Modular nucleic acid-based circuits for counters, binary operations, memory, and logic

Abstract

We have created novel engineered genetic counter designs and methods of use thereof that utilize DNA recombinases to provide modular systems, termed single invertase memory modules (SIMMs), for encoding memory in cells and cellular systems. Our designs are easily extended to compute to high numbers, by utilizing the >100 known recombinases to create subsequent modules. Flexibility in our engineered genetic counter designs is provided by daisy-chaining individual modular components, i.e., SIMMs together. These modular components of the engineered genetic counters can be combined in other network topologies to create circuits that perform, amongst other things, logic and memory. Our novel engineered genetic counter designs allow for the maintenance of memory and provide the ability to count between discrete states by expressing the recombinases between their cognate recognition sites.

Claims

1. A single invertase memory module (SIMM) engineered nucleic acid molecule comprising a nucleic acid sequence encoding: a forward recombinase recognition site (RRS.sub.for), an inverted promoter sequence (iP.sub.inv), a recombinase sequence (RC), a reverse recombinase recognition site (RRS.sub.rev), [RRS.sub.for-iP.sub.inv-RC-RRS.sub.rev],a ribosome binding site (RBS), a protein degradation tag sequence (D), and a transcriptional terminator sequence (T), where the recombinase encoded by the recombinase sequence is specific for the forward and reverse recombination recognition sites.

2. An inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence comprising an inducible promoter sequence (iP.sub.A), at least one single invertase memory module (SIMM), and an output nucleic acid sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the inducer engineered genetic counter nucleic acid molecule comprises a nucleic acid molecule encoding the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev].sub.n-OP, wherein iP.sub.A and the iP.sub.1 of each SIMM are responsive to the same inducer, wherein the recombinase encoded by each at least one SIMM is specific for the forward and reverse recombinase recognition site of that SIMM, and wherein n is an integer value1 and wherein the engineered genetic counter nucleic acid molecule is introduced into a cellular or non-cellular system.

3. The engineered genetic counter of claim 2, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of at least one SIMM comprise a Cre recombinase sequence of SEQ ID NO: 1002, and LoxP recombinase recognition sites comprising the sequence of SEQ ID NO:1 and SEQ ID NO:2.

4. The engineered genetic counter of claim 2, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a Flp recombinase sequence of SEQ ID NO:3 or SEQ ID NO: 1002 and FRT recombinase recognition sites comprising the sequence of SEQ ID NO: 4.

5. The engineered genetic counter of claim 2, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a Flp recombinase sequence of SEQ ID NO:3 or SEQ ID NO: 1002 and FRT recombinase recognition sites comprising the sequence of SEQ ID NO: 5.

6. The engineered genetic counter of claim 2, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a FimB recombinase of SEQ ID NO: 9 and recombinase recognition sites comprising the sequence of SEQ ID NO: 7 and SEQ ID NO: 8.

7. The engineered genetic counter of claim 2, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a FimE recombinase of SEQ ID NO: 10 and recombinase recognition sites comprising the sequence of SEQ ID NO: 7 and SEQ ID NO: 8 respectively.

8. The engineered genetic counter of claim 2, wherein the recombinase sequence of one SIMM comprises a Cre recombinase of SEQ ID NO: 1002, and the LoxP recombinase recognition sites of that SIMM comprise a sequence selected from the group consisting of SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, and SEQ ID NO: 17.

9. The engineered genetic counter of claim 2, wherein at least one inducible promoter comprises a sequence selected from the group consisting of a PLtet0-1 promoter of SEQ ID NO: 33, a PBAD promoter of SEQ ID NO: 34, a PTrc-2 promoter of SEQ ID NO: 35, a PLiaco-i promoter of SEQ ID NO: 36, a PAiLaco-i promoter of SEQ ID NO: 37, a Piac/ara-i promoter of SEQ ID NO: 38, and a PLSICO promoter of SEQ ID NO: 39.

10. The engineered genetic counter of claim 2, wherein at least one inducible promoter comprises a sequence selected from the group consisting of SEQ ID NO: 320-SEQ ID NO: 842.

11. The engineered genetic counter of claim 2, wherein the RBS sequence of at least one SIMM comprises a sequence that is selected from the group consisting of SEQ ID NO: 843-SEQ ID NO: 850.

12. The engineered genetic counter of claim 2, wherein the RBS sequence of at least one SIMM comprises a sequence that is selected from SEQ ID NO: 851-SEQ ID NO: 994.

13. The engineered genetic counter of claim 2, wherein the protein degradation tag sequence of at least one SIMM comprises a sequence that is selected from the group consisting of sequences that encode for the peptides of SEQ ID NO: 995-SEQ ID NO: 1001.

14. A single-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding: an inducible promoter sequence (iP.sub.A), one single invertase memory module (SIMM), and an output nucleic acid sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the single-inducer engineered genetic counter nucleic acid molecule comprises a nucleic acid sequence encoding the following components: iP.sub.A-[RRS.sub.1,for-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-OP, wherein iP.sub.A and iP.sub.1 are responsive to the same inducer, and wherein the recombinase encoded by the SIMM is specific for the forward and reverse recombinase recognition site of the SIMM, and wherein the engineering genetic counter nucleic acid molecule is introduced into a cellular or non-cellular system.

15. The single-inducer engineered genetic counter of claim 14, wherein the inducible promoter sequences iPA and iPi are responsive to arabinose.

16. The single-inducer engineered genetic counter of claim 14, wherein the inducible promoter sequences iPA and iPi are PBAD promoter sequences.

17. The single-inducer engineered genetic counter of claim 14, wherein the recombinase gene sequence (RCi) encodes an FIp recombinase and the forward (RRSfor) and reverse (RRSrev) recombinase recognition sites are FRTF and FRTR sites.

18. The single-inducer engineered genetic counter of claim 14, wherein the output nucleic acid sequence encodes green fluorescent protein.

19. A single-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding: an inducible promoter sequence (iP.sub.A), two single invertase memory modules (SIMMs), and an output nucleic acid sequence encoding an output product (OP), where each SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the single-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.1,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]-OP, wherein iP.sub.A and iP.sub.1 are responsive to the same inducer, and wherein the recombinase encoded by each SIMM is specific for the forward and reverse recombinase recognition site of that SIMM, and wherein the engineering genetic counter nucleic acid molecule is introduced into a cellular or non-cellular system.

20. A multiple-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding: an inducible promoter sequence (iP.sub.A), one single invertase memory module (SIMM), and an output nucleic sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the multiple-inducer engineered genetic counter nucleic acid molecule comprises a nucleic acid sequence encoding the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-OP, wherein iP.sub.A and the iP.sub.1 of the SIMM are responsive to different inducers from each other, and wherein the recombinase encoded by the SIMM is specific for the forward and reverse recombinase recognition site of the SIMM, and wherein the engineered genetic counter nucleic acid molecule is introduced into a cellular or non-cellular system.

21. A multiple-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding: an inducible promoter sequence (iP.sub.A), two single invertase memory modules (SIMM), and an output nucleic sequence encoding an output product (OP), where each SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the multiple-inducer engineered genetic counter nucleic acid molecule comprising a nucleic acid sequence encoding the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.2,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]OP, wherein iP.sub.A and the iP of at least one SIMM are responsive to different inducers from each other, and wherein the recombinase encoded by each SIMM is specific for the forward and reverse recombinase recognition site of that SIMM, and wherein the engineered genetic counter nucleic acid molecule is introduced into a cellular or non-cellular system.

22. A method for counting at least one event in a cellular system comprising introducing an inducer engineered genetic counter of claim 2, 14, 19, 20, or 21 into a cellular system and counting the at least one event in the cellular system.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1A-C depict a single-inducer DIC 3-Counter construct design and results. FIG. 1A shows that a single-inducer DIC 3-Counter is built by cascading SIMMs. FIG. 1B depicts mean fluorescence of single-inducer DIC 3-Counter cell populations over time, measured by a flow cytometer. FIG. 1C depicts GFP fluorescence ratios between a single-inducer DIC 3-Counter exposed to three pulses of arabinose (N) versus two pulses of arabinose (N1), with varying arabinose pulse lengths and intervals.

(2) FIGS. 2A-D depict a multiple-inducer DIC 3-Counter construct design and results. FIG. 2A depicts a multiple-inducer DIC 3-Counter where each promoter is a unique inducible promoter: P.sub.Ltet0-1, P.sub.BAD and P.sub.A1lacO that respond to anhydrotetracycline (aTc), arabinose, and IPTG, respectively. FIG. 2B shows mean fluorescence of multiple-inducer DIC 3-Counter cell populations over time, measured by a flow cytometer. FIG. 2C depicts flow cytometry population data showing a multiple-inducer DIC 3-Counter when exposed to its desired sequence of three inducers and to single inducers only. FIG. 2D depicts flow cytometry population data showing a multiple-inducer DIC 3-Counter when exposed to its desired sequence of three inducers and to all pairwise permutations of inducers.

(3) FIG. 3 depicts a schematic design of a Single Invertase Memory Module (SIMM) used in the DIC counters. The SIMMs are composed of opposing recombinase recognition sites (R.sub.f and R.sub.r) which contain between them an inverted promoter (P.sub.inv), a synthetic ribosome-binding-sequence (RBS), a recombinase gene (rec), an ssrA-based degradation tag, and a transcriptional terminator (Term). The SIMM maintains memory based on its DNA orientation, which can be inverted when the recombinase is expressed.

(4) FIG. 4 shows a single-inducer DIC 2-Counter plasmid. Genes are denoted by arrows within the plasmid circle, promoters by arrows on the plasmid circle, transcriptional terminators by light rectangles, ssrA-based degradation tags by darker rectangles, and recombinase recognition sites by rectangles of other shades.

(5) FIG. 5 shows a single-inducer DIC 3-Counter Plasmid. Genes are denoted by arrows within the plasmid circle, promoters by arrows on the plasmid circle, transcriptional terminators by light rectangles, ssrA-based degradation tags by darker rectangles, and recombinase recognition sites by rectangles of other shades.

(6) FIGS. 6A-C depict a single-inducer DIC 2-Counter construct design and results. FIG. 6A shows that a single-inducer DIC 2-Counter is characterized by a single Single Invertase Memory Module (SIMM) with P.sub.BAD as the inducible upstream promoter and inducible inverted promoter within the SIMM. FIG. 6B shows the mean fluorescence of single-inducer DIC 2-Counter cell populations over time, measured by a flow cytometer, and demonstrates a significant increase in GFP fluorescence after exposure to two pulses of arabinose. FIG. 6C shows the mean fluorescence of single-inducer DIC 2-Counter cell populations over time, measured by a flow cytometer, and demonstrates that cells grown with no inducer for 9 hours followed by a single pulse of arabinose lasting 7 hours did not show significant GFP expression. Mean fluorescence was normalized against the maximum fluorescence for cells obtained in FIGS. 6B and 6C in order to allow comparison between the two plots.

(7) FIG. 7 shows flow cytometry population data for a single-inducer DIC 3-Counter exposed to zero, one, two, or three pulses of arabinose. Each arabinose pulse was 8 hours long and spaced by 9 hours of no arabinose exposure. The data demonstrate that there is no leakage with one pulse (Ara in the legend), a small degree of leakage with two pulses (Ara=>Ara in the legend), and a large degree of activation after three pulses (Ara=>Ara=>Ara in the legend).

(8) FIG. 8 depicts a multiple-inducer DIC 3-Counter Plasmid. Genes are denoted by arrows within the plasmid circle, promoters by arrows on the plasmid circle, transcriptional terminators by light rectangles, ssrA-based degradation tags by darker rectangles, and recombinase recognition sites by rectangles of other shades.

(9) FIGS. 9A-B depict that switching times for each SIMM stage in the multiple-inducer DIC 3-Counter were examined by varying the length of exposure to either anhydrotetracycline or arabinose while holding all other inputs constant (aTc followed by Ara followed by IPTG). When not being varied, aTc and Ara pulses were 18 hours in duration and IPTG pulses were 12 hours in duration. The last input to the multiple-inducer DIC 3-Counter, IPTG, does not drive an invertase stage and directly induces the transcriptional GFP output of the system. FIG. 9A shows that a first SIMM stage responds to aTc within 6 hours of exposure. Very long aTc exposure times did not result in increased GFP fluorescence. FIG. 9B shows that a second SIMM stage begins to respond to Ara within 9 hours of exposure. Very long arabinose exposure times did not result in increased GFP fluorescence.

(10) FIGS. 10A-B depict model predictions of the fluorescence output of n-node RTC Counters in response to n, n1, and n2 arabinose pulses. In FIG. 10A, the numbers on the x-axis represent counters with n nodes, and for each counter the fluorescence output was plotted due to n, n1, and n2 pulses. The best-fit parameter values are used in this figure, the same as those used for FIG. 2. FIG. 10B is similar to FIG. 10A, except that the GFP protein half-life has been reduced from 231 minutes to 8 minutes.

(11) FIGS. 11A-B depict a synthetic pulse generator that can work with a broad range of engineered nucleic acid-based circuits to provide pulse generation and edge detection. FIG. 11A shows that upon addition of an inducer, the synthetic counter circuit starts to transcribe its genes, and at the same time, the synthetic pulse generator produces a repressor protein. As illustrated in FIG. 11B, once enough repressor protein is produced by the synthetic pulse generator, transcription from the inducible promoter is shut down even in the presence of an inducer.

DETAILED DESCRIPTION

(12) We have discovered a nucleic acid-based circuit utilizing DNA recombinases that provides a modular system for encoding memory in cells. Our design is easily extended to compute to high numbers, by utilizing the >100 known recombinases to create subsequent modules. Flexibility in our nucleic acid-based circuit designs is provided by daisy-chaining individual modular components together and utilizing combinations thereof. These modular components of the engineered nucleic acid-based circuits or engineered genetic circuits are combined in other network topologies to create circuits that perform, amongst other things, logic and memory.

(13) While researchers in synthetic biology have developed engineered biological devices that have interesting and well-modeled characteristics (E. Andrianantoandro, Mol Syst Biol 2, 2006.0028 (2006)), many problems exist in the utility of these devices for performing complex computations and information storage. We have discovered that operations on DNA can change the state of a biological circuit in a discrete, Boolean-like fashion, and such states can be maintained without constant energetic input and can persist after cell death. Since the state is encoded in the DNA, it can be inherited and can be transferred through mechanisms of inter-cell DNA transfer, such as conjugation.

(14) We designed our engineered nucleic acid-based or genetic circuits using nucleic acid-based switches instead of the traditionally protein-based systems for several reasons. One example of protein-based memory that can be cascaded to create a counter is the toggle switch (T. S. Gardner, Nature 403, 339 (2000)). The toggle switch requires well-characterized repressors to work properly and is thus much more complicated and more cumbersome than our design, as presented herein. Each of the individual modules of our engineered nucleic acid-based or genetic circuits requires only a single recombinase, whereas protein-based switches utilize two proteins (T. S. Gardner, Nature 403, 339 (2000)). Our nucleic acid-based circuit or engineered genetic circuit designs can be extended readily in a modular fashion with currently known components. Furthermore, our nucleic acid-based system can be used for long periods of time without needing to maintain active transcription and translation of the circuit because our circuit is stable in the absence of inducers. In one embodiment, the engineered nucleic acid-based circuit does not include a toggle switch.

(15) Our invention provides, in part, core modules for engineered nucleic acid-based circuits that can be used for a variety of synthetic circuits and in a modular way to construct memory units. Examples of such synthetic circuits include, but are not limited to, counters, memory, adders, etc. The strength of our modular circuit designs lie in their simplicity, modularity, and extensibility with different recombinase proteins. Therefore, such circuit designs can be used in different means to create basic digital logic in cells.

(16) In one embodiment, the individual modular units used in a genetic counter can be decoupled to each represent a single bit in an engineered memory system rather than a counter. In one embodiment, a pulse generator for the generation of transcriptional pulses is provided that is readily designed by modifying individual modular units to perform inversion events continuously. In some embodiments, the engineered nucleic acid-based circuits and engineered genetic counters described herein essentially comprise AND gates that enforce a particular sequence of inputs. In other embodiments, the design is a cis-based counting system that requires physical proximity of individual counting units for counting transitions. In other embodiments, further functionality, including digital-logic-based computation, is incorporated by adding trans-acting components for coupling to other circuits (K. Rinaudo, Nat Biotechnol 25, 795 (2007)). In other embodiments, the engineered nucleic acid-based circuits can be coupled to quorum-sensing circuits to create a consensus-based counting system.

(17) The ability to count inputs in individual cells is useful for engineering biological organisms and performing basic scientific experiments. Accordingly, described herein are uses of engineered genetic counters in cellular and non-cellular systems, and methods of counting events in cellular and non-cellular systems through the introduction of engineered genetic counters. In a non-limiting example, engineered bacteria can be designed to count exposures to environmental agents, such as toxins or pollutants, and trigger an output, such as population control, only when a discrete threshold has been reached. A yeast cell-cycle counter has been developed to facilitate cell-cycle research (C. M. Ajo-Franklin, Genes Dev 21, 2271 (2007)). Mammalian cells that carry counters can help elucidate the sequence and number of mutations needed to produce cancer cells.

(18) Recombinases and Recombination Recognition Sequences

(19) Described herein are modules that constitute a stable switchable bit of memory, termed as a Single Invertase Memory Module (SIMM), and engineered genetic counters comprising such SIMMs. An improvement of the engineered nucleic acid-based circuits described herein over other described synthetic biological systems is the lack of both leakiness and mixtures of inverted and non-inverted states that is caused by expressing the recombinases independently from their cognate recognition sites. Thus, our invention allows for the maintenance of memory and the ability to count between discrete states by expressing the recombinases between their cognate recognition sites.

(20) The recombinases in the engineered nucleic acid-based circuits and engineered genetic counters described herein, are expressed between their cognate recognition sites recombinase recognition site.sub.for-recombinase-recombinase recognition site.sub.rev). As a result, upon recombinase expression following activation of an upstream promoter, the recombinase causes a single inversion of the DNA between the cognate recognition sites, including its own DNA sequence (i.e., recombinase recognition site.sub.for-inverted recombinase-recombinase recognition site.sub.rev). Any further transcription from the upstream promoter yields antisense RNA of the recombinase gene rather then sense RNA, and therefore no further recombinase protein will be produced. Thus, the inversion event is discrete and stable and does not result in a mixture of inverted and non-inverted states.

(21) As described herein, the engineered nucleic acid-based circuits and engineered genetic counters can use any recombinase for encoding memory, rather than only unidirectional recombinases, allowing greater flexibility and practicality. In some embodiments, the recombinase is encoded between its cognate recombinase recognition sequences. In some embodiments, the recombinase is encoded outside of its cognate recombinase recognition sequences. In such embodiments, where the recombinase is encoded outside of its cognate recombinase recognition sequences, the engineered nucleic acid-based circuit or engineered genetic counter can be used, for example, as a waveform generator or an analog-to-digital converter, where the inputs that lead to recombinase expression results in constant inversion between the recombinase recognition sequences and can be used to generate pulses of output products, such as a fluorescent protein.

(22) The advantages of the use of recombinases that mediate site-specific inversion for use in the various aspects of the invention are the binary dynamics, the sensitivity of the output, the efficiency of DNA usage, and the persistence of the DNA modification. A recombinase, as defined herein, is a site-specific enzyme that recognizes short DNA sequence(s), which are typically between about 30 bp and 40 bp, and mediates the recombination between these recombinase recognition sequences that results in the excision, integration, inversion, or exchange of DNA fragments.

(23) Recombinases can be classified into two distinct families, the integrase and invertase/resolvase families, based on distinct biochemical properties. Members of the integrase family cleave one strand of each of the two DNA molecules involved, then exchange this strand, and subsequently cleave the second DNA strand. Integrase family recombinases use a conserved tyrosine residue to establish a transient covalent bond between the recombinase and the target DNA. Members of the invertase/resolvase family of recombinases cleave all 4 DNA strands and then exchange them, and initiate DNA cleavage by utilizing a serine residue as the catalytic residue. Recombinases have been used for numerous standard biological applications, including the creation of gene knockouts and the solving of sorting problems (N. J. Kilby, Trends Genet. 9, 413 (December, 1993); K. A. Haynes, J Biol Eng 2, 8 (2008); T. S. Ham, Biotechnol Bioeng 94, 1 (2006); K. A. Datsenko, Proc Natl Acad Sci USA 97, 6640 (2000)).

(24) Inversion recombination happens between two short inverted repeated DNA sequences, typically less than 30 bp long. The recombinases bind to these inverted repeated sequences, which are specific to each recombinase, and are defined herein as recombinase recognition sequences or recombinase recognition sites. Thus, as used herein, a recombinase is specific for a recombinase recognition sequence when the recombinase can mediate an inversion between the inverted repeat DNA sequences. As used herein, a recombinase can also be said to recognize its cognate recombinase recognition sites. A DNA loop formation, assisted by DNA bending proteins, brings the two repeat sequences together, at which point DNA cleavage and ligation occur. This reaction is ATP independent and requires supercoiled DNA. The end result of such an inversion recombination event is that the stretch of DNA between the repeated site inverts, i.e., the stretch of DNA reverses orientation, such that what was the coding strand is now the non-coding strand and vice versa. In such reactions, the DNA is conserved with no net gain or no loss of DNA.

(25) The recombinases provided herein are not meant to be an exclusive listing. Other examples of recombinases that are useful in the modules and engineered genetic counters described herein are known to those of skill in the art, and furthermore, any new recombinase that is discovered or generated can be used in the different embodiments of the invention.

(26) In some embodiments, the recombinase comprises the sequence of Cre recombinase of Pubmed Gene ID #277747, and the corresponding loxP recombinase recognition sequences comprise the sequences of ATAACTTCGTATA GCATACAT TATACGAAGTTAT (SEQ ID NO:1) or ATAACTTCGTATA ATGTATGC TATACGAAGTTAT (SEQ ID NO:2).

(27) In some embodiments, the recombinase is Flp recombinase comprising the sequences of GenBank ID U46493 or NC_001398. In another embodiment, the recombinase is an enhanced Flp recombinase that comprises the sequence:

(28) TABLE-US-00001 (SEQIDNO:3) ATGAGCCAATTTGATATATTATGTAAAACACCACCTAAGGTCCTGGTTCG TCAGTTTGTGGAAAGGTTTGAAAGACCTTCAGGGGAAAAAATAGCATCAT GTGCTGCTGAACTAACCTATTTATGTTGGATGATTACTCATAACGGAACA GCAATCAAGAGAGCCACATTCATGAGCTATAATACTATCATAAGCAATTC GCTGAGTTTCGATATTGTCAACAAATCACTCCAGTTTAAATACAAGACGC AAAAAGCAACAATTCTGGAAGCCTCATTAAAGAAATTAATTCCTGCTTGG GAATTTACAATTATTCCTTACAATGGACAAAAACATCAATCTGATATCAC TGATATTGTAAGTAGTTTGCAATTACAGTTCGAATCATCGGAAGAAGCAG ATAAGGGAAATAGCCACAGTAAAAAAATGCTTAAAGCACTTCTAAGTGAG GGTGAAAGCATCTGGGAGATCACTGAGAAAATACTAAATTCGTTTGAGTA TACCTCGAGATTTACAAAAACAAAAACTTTATACCAATTCCTCTTCCTAG CTACTTTCATCAATTGTGGAAGATTCAGCGATATTAAGAACGTTGATCCG AAATCATTTAAATTAGTCCAAAATAAGTATCTGGGAGTAATAATCCAGTG TTTAGTGACAGAGACAAAGACAAGCGTTAGTAGGCACATATACTTCTTTA GCGCAAGGGGTAGGATCGATCCACTTGTATATTTGGATGAATTTTTGAGG AACTCTGAACCAGTCCTAAAACGAGTAAATAGGACCGGCAATTCTTCAAG CAACAAACAGGAATACCAATTATTAAAAGATAACTTAGTCAGATCGTACA ACAAGGCTTTGAAGAAAAATGCGCCTTATCCAATCTTTGCTATAAAGAAT GGCCCAAAATCTCACATTGGAAGACATTTGATGACCTCATTTCTGTCAAT GAAGGGCCTAACGGAGTTGACTAATGTTGTGGGAAATTGGAGCGATAAGC GTGCTTCTGCCGTGGCCAGGACAACGTATACTCATCAGATAACAGCAATA CCTGATCACTACTTCGCACTAGTTTCTCGGTACTATGCATATGATCCAAT ATCAAAGGAAATGATAGCATTGAAGGATGAGACTAATCCAATTGAGGAGT GGCAGCATATAGAACAGCTAAAGGGTAGTGCTGAAGGAAGCATACGATAC CCCGCATGGAATGGGATAATATCACAGGAGGTACTAGACTACCTTTCATC CTACATAAATAGACGCATATAA

(29) The corresponding recombinase recognition sequences for the Flp and enhanced Flp recombinases comprise FRT sites with sequences comprising GAAGTTCCTATTC C GAAGTTCCTATTC TCTAGAAA GTATAGGAACTTC (SEQ ID NO: 4). In some embodiments, minimal FRT recombinase recognition sites are used, comprising the sequence of GAAGTTCCTATTC TCTAGAAA GTATAGGAACTTC (SEQ ID NO: 5)

(30) In some embodiments, the recombinase is R recombinase comprising the sequence of GenBank ID #X02398 and the corresponding recombinase recognition sequence comprising TTGATGAAAGAA TACGTTA TTCTTTCATCAA (SEQ ID NO: 6).

(31) In some embodiments, the recombinase comprises the bidirectional FimB recombinase of GeneID: 948832 (SEQ ID NO: 9) and the corresponding recombinase recognition sequences comprise AATACAAGACAATTGGGGCCAAACTGTCCATATCAT (SEQ ID NO: 7) and CTCTATGAGTCAAAATGGCCCCAAATGTTTCATCTTTTG (SEQ ID NO: 8).

(32) In some embodiments, the recombinase is the unidirectional FimE recombinase of GeneID: 948836 (SEQ ID NO: 10) and the corresponding recombinase recognition sequences comprise SEQ ID NO: 7 and SEQ ID NO: 8.

(33) In some embodiments, the recombinase is an Int recombinase. In some embodiments, the Int recombinase comprises a sequence that encodes for an Int recombinase selected from the group consisting of intE, HP1 Int, and HK022 Int.

(34) In some embodiments, the recombinase is the XerC/XerD recombinase comprising the sequence of GeneID: 5387246 (SEQ ID NO: 11) and the corresponding recombinase recognition sequences comprise cer and dif.

(35) In one embodiment, the recombinase is Salmonella Hin recombinase comprising the sequence of GeneID: 1254295 (SEQ ID NO: 12) and the corresponding recombinase recognition sequences comprise hixL and hixR.

(36) The Cre protein has been purified to homogeneity (Abremski et al. (1984) J. Mol. Biol. 259:1509) and the cre gene has been cloned and expressed in a variety of host cells (Abremski et al. (1983)). Purified Cre protein is available from a number of suppliers (e.g., Stratagene, Novagen and New England Nuclear/Du Pont). Cre catalyzes the cleavage of the lox site within the spacer region and creates a six base-pair staggered cut (Hoess and Abremski (1985) J. Mol. Biol. 181:351). The two 13 bp inverted repeat domains of the lox site represent binding sites for the Cre protein. If two lox sites differ in their spacer regions in such a manner that the overhanging ends of the cleaved DNA cannot reanneal with one another, Cre cannot efficiently catalyze a recombination event using the two different lox sites. For example, it has been reported that Cre cannot recombine (at least not efficiently) a loxP site and a loxP511 site; these two lox sites differ in the spacer region. Two lox sites which differ due to variations in the binding sites (i.e., the 13 bp inverted repeats) may be recombined by Cre provided that Cre can bind to each of the variant binding sites; the efficiency of the reaction between two different lox sites (varying in the binding sites) may be less efficient that between two lox sites having the same sequence (the efficiency will depend on the degree and the location of the variations in the binding sites). For example, the loxC2 site can be efficiently recombined with the loxP site; these two lox sites differ by a single nucleotide in the left binding site.

(37) In addition to the foregoing examples of sequences that the Cre protein recognizes, Cre also recognizes a number of variant or mutant lox sites (variant relative to the loxP sequence), including the loxB, loxL, loxR, loxA86, and lox.DELTA.117 sites which are found in the E. coli chromosome (Hoess et al. (1982)). Other variant lox sites include loxP511 (5ATAACTTCGTATAGTATACATTATACGAAGTTAT-3 (SEQ ID NO: 13)); Hoess et al. (1986), supra), loxC2 (5-ACAAC TTCGTATAATGTATGCTATACGAAGTTAT-3 (SEQ ID NO: 14); U.S. Pat. No. 4,959,317), lox66 (5CTTGGTATAGCATACATTATACGAACGGTA-3) (SEQ ID NO: 15), lox 71 (5GTTCGTATACGATACATTATACGAAGTTAT 3) (SEQ ID NO: 16), and lox BBa_J61046 (5CTTCGTATAATGTATGCTATACGAAGTTAT3) (SEQ ID NO: 17).

(38) Other alternative site-specific recombinases include: 1) the FLP recombinase of the 2pi plasmid of Saccharomyces cerevisiae (Cox (1983), Proc. Natl. Acad. Sci. USA 80:4223) which recognize the frt site which, like the loxP site, comprises two 13 bp inverted repeats separated by an 8 bp spacer (5-GAAGTTCCTATTCTCTAGAAAGT ATAGGAACTTC-3 (SEQ ID NO: 18)). The FLP gene has been cloned and expressed in E. coli (Cox, supra) and in mammalian cells (PCT International Patent Application PCT/US92/01899, Publication No.: WO 92/15694, the disclosure of which is herein incorporated by reference) and has been purified (Meyer-Lean et al. (1987) Nucleic Acids Res. 15:6469; Babineau et al (1985) J. Biol. Chem. 260:12313; Gronostajski and Sadowski (1985) J. Biol. Chem. 260:12328); 2) the integrase of Streptomyces phage .PHI.C31 that carries out efficient recombination between the attP site of the phage genome and the attB site of the host chromosome (Groth et al., 2000 Proc. Natl. Acad. Sci. USA, 97: 5995); 3) the Int recombinase of bacteriophage lambda (lambda-int/attP) (with or without Xis) which recognizes att sites (Weisberg et al. In: Lambda II, supra, pp. 211-250); 4) the xerC and xerD recombinases of E. coli which together form a recombinase that recognizes the 28 bp dif site (Leslie and Sherratt (1995) EMBO J. 14:1561); 5) the Int protein from the conjugative transposon Tn916 (Lu and Churchward (1994) EMBO J. 13:1541); 6) TpnI and the -lactamase transposons (Levesque (1990) J. Bacteriol. 172:3745); 7) the Tn3 resolvase (Flanagan et al. (1989) J. Mol. Biol. 206:295 and Stark et al. (1989) Cell 58:779); 8) the SpoIVC recombinase of Bacillus subtilis (Sato et al. J. Bacteriol. 172:1092); 9) the Hin recombinase (Galsgow et al. (1989) J. Biol. Chem. 264:10072); 10) the Cin recombinase (Hafter et al. (1988) EMBO J. 7:3991); 11) the immunoglobulin recombinases (Malynn et al. Cell (1988) 54:453); and 12) the FIMB and FIME recombinases (Blomfield et al., 1997 Mol. Microbiol. 23:705).

(39) In the natural Salmonella system, the Hin DNA recombinase (BBa_J31000, BBa_J31001) catalyzes an inversion reaction that regulates the expression of alternative flagellin genes by switching the orientation of a promoter located on a 1 kb invertible DNA segment. The asymmetrical palindromic sequences hixL and hixR flank the invertible DNA segment and serve as the recognition sites for cleavage and strand exchange. A 70 bp cis-acting recombinational enhancer (RE) increases efficiency of protein-DNA complex formation. In some embodiments, rather than hixL and hixR, hixC (BBa_J44000), a composite 26 bp symmetrical hix site that shows higher binding affinity for Hin and a 16-fold slower inversion rate than wild type sites hixL and hixR can be used. In addition, a modified Hin/hix DNA recombination system can be used in vivo to manipulate at least two adjacent hixC-flanked DNA segments. Hin recombinase fused to a C-terminus LVA degradation tag (BBa_J31001) and hixC (BBa_J44000) are sufficient for DNA inversion activity. Exemplary sequences for the recombinational enhancer and modified Hin recombinase recognition sequences are provided below:

(40) TABLE-US-00002 TABLE1 Name Description Sequence Length BBa_J3101 SEQIDNO:19Recombinational ... 77 Enhancer(RE)forHin/Hixinverting ctttctagtgcaaattgtgaccgcattttg BBa_J44000 SEQIDNO:20hixCbindingsite ttatcaaaaaccatggtttttgataa 26 forSalmonellatyphimuriumHin recombinase

(41) TABLE-US-00003 TABLE 2 Name Protein Description Direction KEGG UniProt E.C. Length BBa_J31001 Hin- DNA invertase Hin stm: STM2772 P03013 none 612 LVA tagged with LVA DNA-invertase Hin BBa_J31000 Hin from Salmonella stm: STM2772 P03013 none 573 typhimurium

(42) Bacteriophage has long served as a model system for studies of regulated site-specific recombination. In conditions favorable for bacterial growth, the phage genome is inserted into the Escherichia coli genome by an integrative recombination reaction, which takes place between DNA attachment sites called attP and attB in the phage and bacterial genomes, respectively. As a result, the integrated DNA is bounded by hybrid attachment sites, termed attL and attR. In response to the physiological state of the bacterial host or to DNA damage, phage DNA excises itself from the host chromosome. This excision reaction recombines attL with attR to precisely restore the attP and attB sites on the circular and E. coli DNAs. The phage-encoded integrase protein (Int), a tyrosine recombinase, splices together bacterial and phage attachment sites. Int is required for both integration and excision of the prophage.

(43) recombination has a strong directional bias in response to environmental conditions. Accessory factors, whose expression levels change in response to host physiology, control the action of Int and determine whether the phage genome will remain integrated or be excised. Int has two DNA-binding domains: a C-terminal domain, consisting of a catalytic domain and a core-binding (CB) domain, that interacts with the core recombining sites and an N-terminal domain (N-domain) that recognizes the regulatory arm DNA sites [5]. The heterobivalent Int molecules bridge distant core and arm sites with the help of accessory proteins, such as integration host factor (IHF), which bend the DNA at intervening sites, and appose arm and core sequences for interaction with the Int recombinase. Five arm DNA sites in the regions flanking the core of attP are differentially occupied during integration and excision reactions. The integration products attL and attR cannot revert back to attP and attB without assistance from the phage-encoded factor Xis, which bends DNA on its own or in combination with the host-encoded factor Fis. Xis also inhibits integration, and prevents the attP and attB products of excision from reverting the attP and attB products of excision from reverting to attL and attR. Because the cellular levels of IHF and F is proteins respond to growth conditions, these host-encoded factors have been proposed as the master signals for integration and excision. Additional exemplary recombination recognition sequences and recombinases for the practice of the invention described herein are shown below:

(44) TABLE-US-00004 TABLE3 Name Description Sequence Length BBa_I11022 SEQIDNO:21LambdaattB, accactttgtacaagaaagctgggt 25 reversecomplement BBa_I11023 SEQIDNO:22LambdaattP ... 232 tcactatcagtcaaaataaaatcattattt BBa_K112141 SEQIDNO:23attR2 ... 136 recombinationsite gttcagctttcttgtacaaagtggttgatc BBa_K112142 SEQIDNO:24attR2 ... 136 recombinationsite-reverse aacacaacatatccagtcactatggtcgac orientation

(45) TABLE-US-00005 TABLE 4 Name Protein Description Direction KEGG UniProt E.C. Length BBa_I11021 Xis excisionase from E. coli Forward none P03699 none 255 lambda phage lambda (removes prophage from host genome) BBa_I11020 Int integrase from E. coli phage Forward none P03700 none 1107 lambda lambda BBa_K112001 Xis Xis from bacteriophage 216 lambda, assembly standard 21 BBa_K112204 {a~xis} The bacteriophage 223 lambda xis gene ready to have rbs attached and stop codon; assembly stand BBa_K112200 {xis} from bacteriophage 219 lambda; assembly standard 21

(46) Bacteriophage P22 is a lambdoid phage which infects Salmonella typhimurium. P22 can integrate into and excise out of its host chromosome via site-specific recombination. Both integration and excision reactions require the phage-encoded int gene, and excision is dependent on the xis gene as well.

(47) P22 Int is a member of the integrase family. The Int proteins of and P22 are composed of two domains. The catalytic domain binds to the core region of the phage recombination site, attP, where the actual recombination reactions occur. The smaller amino -terminal domain binds to arm-type sequences which are located on either site of the core within the attP. The active components of integrative and excisive recombination are nucleosome-like structures, called intasomes, in which DNA is folded around several molecules of Int and integration host factor (IHF). It has been demonstrated that one monomer of integrase can simultaneously occupy both a core-type binding site and an arm-type binding site. Formation of these bridges is facilitated by IHF, which binds to specific sequences and imparts a substantial bend to the DNA.

(48) The attP regions of P22 and are also similar in that both contain arm regions, known as the P and P arms, which contain Int arm-type binding sites and IHF binding sites. However, the arrangement, spacing, and orientation of the Int and IHF binding sites are distinct. The attP region of contains two Int arm-type binding sites on the P arm and three on the P arm. The P arm contains two IHF binding sites, and the P arm contains a single site. The attP region of P22 contains three Int arm-type binding sites on the P arm and two sites on the P arm. In addition, IHF binding sites, called H and H, are located on each arm of the P22 attP. Leong et al. showed that the Escherichia coli IHF can recognize and bind to these P22 IHF binding sites in vitro. It was also shown that the maximum amount of P22 integrative recombination occurred in the presence of E. coli IHF in vitro, whereas in its absence, recombination was detectable but depressed. However, the requirement for IHF or other possible accessory proteins during P22 site-specific recombination in vivo has not been tested. In this study, we assessed the role of IHF in P22 integration and excision in vivo.

(49) Although the attP region of P22 contains strong IHF binding sites, in vivo measurements of integration and excision frequencies showed that infecting P22 phages can perform site-specific recombination to its maximum efficiency in the absence of IHF. In addition, a plasmid integration assay showed that integrative recombination occurs equally well in wild-type and ihfA mutant cells. P22 integrative recombination is also efficient in Escherichia coli in the absence of functional IHF. Additional exemplary recombination recognition sequences and recombinases are described below:

(50) TABLE-US-00006 TABLE5 Name Description Sequence Length BBa_I11032 SEQIDNO:25reversecomplement acgaccttcgcattacgaatgcgctgc 27 P22attB, BBa_I11033 SEQIDNO:26P22attP ... 260 gggacatatttgggacagaagtaccaaaaa

(51) TABLE-US-00007 TABLE 6 Name Protein Description Direction KEGG UniProt E.C. Length BBa_I11031 Xis excisionase from E. coli phage Forward none P04889 none 387 P22 P22 (removes prophage from host genome) BBa_I11030 Int integrase from E. coli phage Forward none P04890 none 1200 P22 P22

(52) The FLP system of the yeast 2 mm plasmid is one of the most attractive for genomic manipulation because of its efficiency, simplicity, and demonstrated in vivo activity in a wide range of organisms. The Flp system has been used to construct specific genomic deletions and gene duplications, study gene function, promote chromosomal translocations, promote site-specific chromosome cleavage, and facilitate the construction of genomic libraries in organisms including bacteria, yeast, insects, plants, mice, and humans. Site-specific recombination catalyzed by the FLP recombinase occurs readily in bacterial cells.

(53) The yeast FLP system has been studied intensively. The only requirements for FLP recombination are the FLP protein and the FLP recombination target (FRT) sites on the DNA substrates. The minimal functional FRT site contains only 34 bp. The FLP protein can promote both inter- and intramolecular recombination. Exemplary recombination recognition sequences for use with the yeast FLP system are provided below:

(54) TABLE-US-00008 TABLE7 Name Description Sequence Length BBa_J61020 SEQIDNO:27[FRT] ... 34 ttcctatactttttagagaataggaacttc BBa_J72001 SEQIDNO:28[FRT] ... 36 recombinationsiteforflp ttcctatactttctagagaataggaacttc recombinaseinBBb

(55) The separation and segregation of newly replicated E. coli circular chromosomes can also be prevented by the formation of circular chromosome dimers, which can arise during crossing over by homologous recombination. In E. coli, these dimers, which arise about once every six generations, are resolved to monomers by the action of the FtsK-XerCD-dif chromosome dimer resolution machinery. Two site-specific recombinases of the tyrosine recombinase family, XerCD, act at a 28 bp recombination site, dif, located in the replication terminus region of the E. coli chromosome to remove the crossover introduced by dimer formation, thereby converting dimers to monomers. A complete dimer resolution reaction during recombination at dif requires the action of the C-terminal domain of FtsK (FtsK.sub.C). FtsK is a multifunctional protein whose N-terminal domain acts in cell division, while the C-terminal domain functions in chromosome segregation. Therefore, FtsK is well suited to coordinate chromosome segregation and cell division. A purified protein, FtsK.sub.50C, containing a functional C-terminal domain, can translocate DNA in an ATP-dependent manner and activate Xer recombination at the recombination site dif, thereby reconstituting in vitro the expected in vivo activities of the C-terminal domain of the complete FtsK protein. Additional exemplary recombination recognition sequences for use with the XerCD system are provided below:

(56) TABLE-US-00009 TABLE8 Name Description Sequence Length BBa_I742101 SEQIDNO:29difsitewith ... 31 forwardorientation tcggtgcgcataatgtatattatgttaaat BBa_I742102 SEQIDNO:30difsitewith ... 31 reverseorientation tcatttaacataatatacattatgcgcacc

(57) The fim switch (fimS) consists of a 314 bp DNA element that can be inverted by site-specific recombinases FimB and FimE. In the natural system, fimSc contains a promoter, that when switched to the on orientation, drives transcription of the fim operon. The fim operon is needed for export and structural assembly of type 1 fimbriae. FimB and FimE, required to invert fimS, are members of the integrase family of site-specific recombinases. Recombination of fimS is distinct from the related Xer-mediated recombination in that the recombinases act independently to invert fimS. Each inverted repeat (IR) is flanked by overlapping FimB and FimE binding sites, and following occupancy of these sites they recombine the switch within the IR sequence. As for phage chromosomal integration and excision, fim recombination also requires accessory proteins, specifically integration host factor (IHF) and the leucine-responsive regulatory protein (Lrp). These proteins are believed to contribute to the overall architecture of the fim switch that facilitates synapse of the 9 bp IRs.

(58) FimB catalyses inversion in both directions, although with a slight bias for the off-to-on orientation, while FimE predominantly catalyses on-to-off inversion. Control of FimE expression is important in bringing about its orientation bias; as the fim switch is located at the end of fimE, the orientation of fimS determines the length and 3 sequence of the fimE transcript. As a consequence, fimE mRNA is likely to be subject to more rapid 3 to 5 degradation when the switch is in the off orientation than when it is in the on orientation. In addition, FimE preferentially binds to fimS in the on orientation, as has been demonstrated in vitro and in vivo, which adds to the directional bias. A further difference between FimB and FimE is that FimB inversion frequencies are markedly lower than those exhibited by FimE, both in vitro and in vivo. Additional exemplary recombination recognition sequences and recombinases for use with the FimB and FimE system are provided below:

(59) TABLE-US-00010 TABLE9 Name Description Sequence Recombinase Length BBa_K137008 SEQIDNO:31fimE ... 35 IRR gaaacatttggggccaaactgtccatatta BBa_K137010 SEQIDNO:32fimE ... 35 IRL gagtcaaaatggccccaattgtcttgtatt

(60) TABLE-US-00011 TABLE 10 Name Protein Description Length BBa_K137007 fimE 558
Promoters

(61) Described herein are promoter sequences for use in the engineered genetic counters and modules. In some aspects, the promoters used in the engineered genetic counters and modules drives expression of an operably linked recombinase, thus regulating expression and consequent enzymatic activity of said recombinase.

(62) The term promoter as used herein refers to any nucleic acid sequence that regulates the expression of another nucleic acid sequence by driving transcription of the nucleic acid sequence, which can be a heterologous target gene, encoding a protein or RNA. Promoters can be constitutive, inducible, activateable, repressible, tissue-specific, or any combination thereof. A promoter is a control region of a nucleic acid sequence at which initiation and rate of transcription of the remainder of a nucleic acid sequence are controlled. A promoter may also contain genetic elements at which regulatory proteins and molecules may bind, such as RNA polymerase and other transcription factors. In some embodiments of the aspects, a promoter may drive the expression of a transcription factor that regulates the expression of the promoter itself, or that of another promoter used in another modular component of the invention.

(63) A promoter can be said to drive expression or drive transcription of the nucleic acid sequence that it regulates. The phrases operably linked, operatively positioned, operatively linked, under control, and under transcriptional control indicate that a promoter is in a correct functional location and/or orientation in relation to a nucleic acid sequence it regulates to control transcriptional initiation and/or expression of that sequence. An inverted promoter is a promoter in which the nucleic acid sequence is in the reverse orientation, such that what was the coding strand is now the non-coding strand, and vice versa. Inverted promoter sequences can be used in various embodiments of the invention to regulate the state of a module or a switch. Thus, inversion of an inverted promoter sequence due, for example, to recombinase activity, orients the promoter in a direction such that it can drive expression of an operably linked sequence. In some embodiments of the aspects described herein, the promoter is an inverted inducible promoter that, upon inversion to the correct orientation, can drive expression of an operably linked sequence upon receiving the appropriate inducer signal. In addition, in various embodiments of the invention, a promoter may or may not be used in conjunction with an enhancer, which refers to a cis-acting regulatory sequence involved in the transcriptional activation of a nucleic acid sequence downstream of the promoter. The enhancer may be located at any functional location before or after the promoter, and/or the encoded nucleic acid.

(64) A promoter may be one naturally associated with a gene or sequence, as may be obtained by isolating the 5 non-coding sequences located upstream of the coding segment and/or exon of a given gene or sequence. Such a promoter can be referred to as endogenous. Similarly, an enhancer may be one naturally associated with a nucleic acid sequence, located either downstream or upstream of that sequence.

(65) Alternatively, certain advantages will be gained by positioning a coding nucleic acid segment under the control of a recombinant or heterologous promoter, which refers to a promoter that is not normally associated with the encoded nucleic acid sequence in its natural environment. A recombinant or heterologous enhancer refers to an enhancer not normally associated with a nucleic acid sequence in its natural environment. Such promoters or enhancers may include promoters or enhancers of other genes; promoters or enhancers isolated from any other prokaryotic, viral, or eukaryotic cell; and synthetic promoters or enhancers that are not naturally occurring, i.e., contain different elements of different transcriptional regulatory regions, and/or mutations that alter expression through methods of genetic engineering that are known in the art. In addition to producing nucleic acid sequences of promoters and enhancers synthetically, sequences may be produced using recombinant cloning and/or nucleic acid amplification technology, including PCR, in connection with the biological converter switches and modules disclosed herein (see U.S. Pat. Nos. 4,683,202, 5,928,906, each incorporated herein by reference). Furthermore, it is contemplated the control sequences that direct transcription and/or expression of sequences within non-nuclear organelles such as mitochondria, chloroplasts, and the like, can be employed as well.

(66) Inducible Promoters

(67) As described herein, an inducible promoter is one that is characterized by initiating or enhancing transcriptional activity when in the presence of, influenced by, or contacted by an inducer or inducing agent. An inducer or inducing agent may be endogenous, or a normally exogenous compound or protein that is administered in such a way as to be active in inducing transcriptional activity from the inducible promoter. In some embodiments, the inducer or inducing agent, i.e., a chemical, a compound or a protein, can itself be the result of transcription or expression of a nucleic acid sequence (i.e., an inducer can be a transcriptional repressor protein), which itself may be under the control or an inducible promoter. In some embodiments, an inducible promoter is induced in the absence of certain agents, such as a repressor. Examples of inducible promoters include but are not limited to, tetracycline, metallothionine, ecdysone, mammalian viruses (e.g., the adenovirus late promoter; and the mouse mammary tumor virus long terminal repeat (MMTV-LTR)) and other steroid-responsive promoters, rapamycin responsive promoters and the like.

(68) Inducible promoters useful in the methods and systems of the present invention are capable of functioning in both prokaryotic and eukaryotic host organisms. In some embodiments of the different aspects of the invention, mammalian inducible promoters are included, although inducible promoters from other organisms, as well as synthetic promoters designed to function in a prokaryotic or eukaryotic host may be used. One important functional characteristic of the inducible promoters of the present invention is their ultimate inducibility by exposure to an externally applied inducer, such as an environmental inducer. Appropriate environmental inducers include exposure to heat (i.e., thermal pulses or constant heat exposure), various steroidal compounds, divalent cations (including Cu.sup.2+ and Zn.sup.2+), galactose, tetracycline, IPTG (isopropyl--D thiogalactoside), as well as other naturally occurring and synthetic inducing agents and gratuitous inducers.

(69) The promoters for use in the biological circuit chemotactic converters and modules described herein encompass the inducibility of a prokaryotic or eukaryotic promoter by, in part, either of two mechanisms. In particular embodiments of the present invention, the engineered genetic counters and their component modules comprise suitable inducible promoters that can be dependent upon transcriptional activators that, in turn, are reliant upon an environmental inducer. In other embodiments, the inducible promoters can be repressed by a transcriptional repressor which itself is rendered inactive by an environmental inducer, such as the product of a sequence driven by another promoter. Thus, unless specified otherwise, an inducible promoter can be either one that is induced by an inducing agent that positively activates a transcriptional activator, or one which is derepressed by an inducing agent that negatively regulates a transcriptional repressor. In such embodiments of the various aspects described herein, where it is required to distinguish between an activating and a repressing inducing agent, explicit distinction will be made.

(70) Inducible promoters that are useful in the engineered biological counters and methods of use described herein include those controlled by the action of latent transcriptional activators that are subject to induction by the action of environmental inducing agents. Some non-limiting examples include the copper-inducible promoters of the yeast genes CUP1, CRS5, and SOD1 that are subject to copper-dependent activation by the yeast ACE1 transcriptional activator (see e.g. Strain and Culotta, 1996; Hottiger et al., 1994; Lapinskas et al., 1993; and Gralla et al., 1991). Alternatively, the copper inducible promoter of the yeast gene CTT1 (encoding cytosolic catalase T), which operates independently of the ACE1 transcriptional activator (Lapinskas et al., 1993), can be utilized. The copper concentrations required for effective induction of these genes are suitably low so as to be tolerated by most cell systems, including yeast and Drosophila cells. Alternatively, other naturally occurring inducible promoters can be used in the present invention including: steroid inducible gene promoters (see e.g. Oligino et al. (1998) Gene Ther. 5: 491-6); galactose inducible promoters from yeast (see e.g. Johnston (1987) Microbiol Rev 51: 458-76; Ruzzi et al. (1987) Mol Cell Biol 7: 991-7); and various heat shock gene promoters. Many eukaryotic transcriptional activators have been shown to function in a broad range of eukaryotic host cells, and so, for example, many of the inducible promoters identified in yeast can be adapted for use in a mammalian host cell as well. For example, a unique synthetic transcriptional induction system for mammalian cells has been developed based upon a GAL4-estrogen receptor fusion protein that induces mammalian promoters containing GAL4 binding sites (Braselmann et al. (1993) Proc Natl Acad Sci USA 90: 1657-61). These and other inducible promoters responsive to transcriptional activators that are dependent upon specific inducers are suitable for use with the present invention.

(71) Inducible promoters useful in the modules and methods disclosed herein also include those that are repressed by transcriptional repressors that are subject to inactivation by the action of environmental, external agents, or the product of another gene. Such inducible promoters may also be termed repressible promoters where it is required to distinguish between other types of promoters in a given module or component of an engineered genetic counter described herein. Examples include prokaryotic repressors that can transcriptionally repress eukaryotic promoters that have been engineered to incorporate appropriate repressor-binding operator sequences. Preferred repressors for use in the present invention are sensitive to inactivation by physiologically benign agent. Thus, where a lac repressor protein is used to control the expression of a promoter sequence that has been engineered to contain a lacO operator sequence, treatment of the host cell with IPTG will cause the dissociation of the lac repressor from the engineered promoter containing a lacO operator sequence and allow transcription to occur. Similarly, where a tet repressor is used to control the expression of a promoter sequence that has been engineered to contain a tetO Operator sequence, treatment of the host cell with tetracycline will cause the dissociation of the tet repressor from the engineered promoter and allow transcription of the sequence downstream of the engineered promoter to occur.

(72) An inducible promoter useful in the methods and systems as disclosed herein can be induced by one or more physiological conditions, such as changes in pH, temperature, radiation, osmotic pressure, saline gradients, cell surface binding, and the concentration of one or more extrinsic or intrinsic inducing agents. The extrinsic inducer or inducing agent may comprise amino acids and amino acid analogs, saccharides and polysaccharides, nucleic acids, protein transcriptional activators and repressors, cytokines, toxins, petroleum-based compounds, metal containing compounds, salts, ions, enzyme substrate analogs, hormones, and combinations thereof. In specific embodiments, the inducible promoter is activated or repressed in response to a change of an environmental condition, such as the change in concentration of a chemical, metal, temperature, radiation, nutrient or change in pH. Thus, an inducible promoter useful in the methods and systems as disclosed herein can be a phage inducible promoter, nutrient inducible promoter, temperature inducible promoter, radiation inducible promoter, metal inducible promoter, hormone inducible promoter, steroid inducible promoter, and/or hybrids and combinations thereof.

(73) Promoters that are inducible by ionizing radiation can be used in certain embodiments, where gene expression is induced locally in a cell by exposure to ionizing radiation such as UV or x-rays. Radiation inducible promoters include the non-limiting examples of fos promoter, c-jun promoter or at least one CArG domain of an Egr-1 promoter. Further non-limiting examples of inducible promoters include promoters from genes such as cytochrome P450 genes, inducible heat shock protein genes, metallothionein genes, hormone-inducible genes, such as the estrogen gene promoter, and such. In further embodiments, an inducible promoter useful in the methods and systems as disclosed herein can be Zn.sup.2+ metallothionein promoter, metallothionein-1 promoter, human metallothionein IIA promoter, lac promoter, lacO promoter, mouse mammary tumor virus early promoter, mouse mammary tumor virus LTR promoter, triose dehydrogenase promoter, herpes simplex virus thymidine kinase promoter, simian virus 40 early promoter or retroviral myeloproliferative sarcoma virus promoter. Examples of inducible promoters also include mammalian probasin promoter, lactalbumin promoter, GRP78 promoter, or the bacterial tetracycline-inducible promoter. Other examples include phorbol ester, adenovirus E1A element, interferon, and serum inducible promoters.

(74) Inducible promoters useful in the modules and engineered genetic counters as disclosed herein for in vivo uses may include those responsive to biologically compatible agents, such as those that are usually encountered in defined animal tissues. An example is the human PAI-1 promoter, which is inducible by tumor necrosis factor. Further suitable examples include cytochrome P450 gene promoters, inducible by various toxins and other agents; heat shock protein genes, inducible by various stresses; hormone-inducible genes, such as the estrogen gene promoter, and such.

(75) The administration or removal of an inducer or repressor as disclosed herein results in a switch between the on or off states of the transcription of the operably linked heterologous target gene. Thus, as defined herein the on state of a promoter operably linked to a nucleic acid sequence, refers to the state when the promoter is actively driving transcription of the operably linked nucleic acid sequence, i.e., the linked nucleic acid sequence is expressed. Several small molecule ligands have been shown to mediate regulated gene expressions, either in tissue culture cells and/or in transgenic animal models. These include the FK1012 and rapamycin immunosupressive drugs (Spencer et al., 1993; Magari et al., 1997), the progesterone antagonist mifepristone (RU486) (Wang, 1994; Wang et al., 1997), the tetracycline antibiotic derivatives (Gossen and Bujard, 1992; Gossen et al., 1995; Kistner et al., 1996), and the insect steroid hormone ecdysone (No et al., 1996). All of these references are herein incorporated by reference. By way of further example, Yao discloses in U.S. Pat. No. 6,444,871, which is incorporated herein by reference, prokaryotic elements associated with the tetracycline resistance (tet) operon, a system in which the tet repressor protein is fused with polypeptides known to modulate transcription in mammalian cells. The fusion protein is then directed to specific sites by the positioning of the tet operator sequence. For example, the tet repressor has been fused to a transactivator (VP16) and targeted to a tet operator sequence positioned upstream from the promoter of a selected gene (Gussen et al., 1992; Kim et al., 1995; Hennighausen et al., 1995). The tet repressor portion of the fusion protein binds to the operator thereby targeting the VP16 activator to the specific site where the induction of transcription is desired. An alternative approach has been to fuse the tet repressor to the KRAB repressor domain and target this protein to an operator placed several hundred base pairs upstream of a gene. Using this system, it has been found that the chimeric protein, but not the tet repressor alone, is capable of producing a 10 to 15-fold suppression of CMV-regulated gene expression (Deuschle et al., 1995).

(76) One example of a repressible promoter useful in the modules and engineered genetic counters as described herein is the Lac repressor (lacR)/operator/inducer system of E. coli that has been used to regulate gene expression by three different approaches: (1) prevention of transcription initiation by properly placed lac operators at promoter sites (Hu and Davidson, 1987; Brown et al., 1987; Figge et al., 1988; Fuerst et al., 1989; Deuschle et al., 1989; (2) blockage of transcribing RNA polymerase II during elongation by a LacR/operator complex (Deuschle et al. (1990); and (3) activation of a promoter responsive to a fusion between LacR and the activation domain of herpes simples virus (HSV) virion protein 16 (VP16) (Labow et al., 1990; Baim et al., 1991). In one version of the Lac system, expression of lac operator-linked sequences is constitutively activated by a LacR-VP16 fusion protein and is turned off in the presence of isopropyl--D-1-thiogalactopyranoside (IPTG) (Labow et al. (1990), cited supra). In another version of the system, a lacR-VP16 variant is used that binds to lac operators in the presence of IPTG, which can be enhanced by increasing the temperature of the cells (Baim et al. (1991), cited supra). Thus, in some embodiments of the present invention, components of the Lac system are utilized. For example, a lac operator (LacO) may be operably linked to tissue specific promoter, and control the transcription and expression of the heterologous target gene and another repressor protein, such as the TetR. Accordingly, the expression of the heterologous target gene is inversely regulated as compared to the expression or presence of Lac repressor in the system.

(77) Components of the tetracycline (Tc) resistance system of E. coli have also been found to function in eukaryotic cells and have been used to regulate gene expression. For example, the Tet repressor (TetR), which binds to tet operator (tetO) sequences in the absence of tetracycline and represses gene transcription, has been expressed in plant cells at sufficiently high concentrations to repress transcription from a promoter containing tet operator sequences (Gatz, C. et al. (1992) Plant J. 2:397-404). In some embodiments of the present invention, the Tet repressor system is similarly utilized in the engineered genetic counters.

(78) A temperature- or heat-inducible gene regulatory system may also be used in the present invention, such as the exemplary TIGR system comprising a cold-inducible transactivator in the form of a fusion protein having a heat shock responsive regulator, rheA, fused to the VP16 transactivator (Weber et al., 2003a). The promoter responsive to this fusion thermosensor comprises a rheO element operably linked to a minimal promoter, such as the minimal version of the human cytomegalovirus immediate early promoter. At the permissive temperature of 37 C., the cold-inducible transactivator transactivates the exemplary rheO-CMVmin promoter, permitting expression of the target gene. At 41 C., the cold-inducible transactivator no longer transactivates the rheO promoter. Any such heat-inducible or -regulated promoter can be used in accordance with the methods of the present invention, including but not limited to a heat-responsive element in a heat shock gene (e.g., hsp20-30, hsp27, hsp40, hsp60, hsp70, and hsp90). See Easton et al. (2000) Cell Stress Chaperones 5(4):276-290; Csermely et al. (1998) Pharmacol Ther 79(2): 129-168; Ohtsuka & Hata (2000) Int J Hyperthermia 16(3):231-245; and references cited therein. Sequence similarity to heat shock proteins and heat-responsive promoter elements have also been recognized in genes initially characterized with respect to other functions, and the DNA sequences that confer heat inducibility are suitable for use in the disclosed gene therapy vectors. For example, expression of glucose-responsive genes (e.g., grp94, grp78, mortalin/grp75) (Merrick et al. (1997) Cancer Lett 119(2): 185-190; Kiang et al. (1998) FASEB J 12(14):1571-16-579), calreticulin (Szewczenko-Pawlikowski et al. (1997) MoI Cell Biochem 177(1-2): 145-152); clusterin (Viard et al. (1999) J Invest Dermatol 112(3):290-296; Michel et al. (1997) Biochem J 328(Ptl):45-50; Clark & Griswold (1997) J Androl 18(3):257-263), histocompatibility class I gene (HLA-G) (Ibrahim et al. (2000) Cell Stress Chaperones 5(3):207-218), and the Kunitz protease isoform of amyloid precursor protein (Shepherd et al. (2000) Neuroscience 99(2):317-325) are upregulated in response to heat. In the case of clusterin, a 14 base pair element that is sufficient for heat-inducibility has been delineated (Michel et al. (1997) Biochem J 328(Pt1):45-50). Similarly, a two sequence unit comprising a 10- and a 14-base pair element in the calreticulin promoter region has been shown to confer heat-inducibility (Szewczenko-Pawlikowski et al. (1997) Mol Cell Biochem 177(1-2): 145-152).

(79) Other inducible promoters useful in the engineered genetic counters described herein include the erythromycin-resistance regulon from E. coli, having repressible (E.sub.off) and inducible (E.sub.on) systems responsive to macrolide antibiotics, such as erythromycin, clarithromycin, and roxithromycin (Weber et al., 2002). The E.sub.off system utilizes an erythromycin-dependent transactivator, wherein providing a macrolide antibiotic represses transgene expression. In the E.sub.on system, the binding of the repressor to the operator results in repression of transgene expression. Therein, in the presence of macrolides gene expression is induced.

(80) Fussenegger et al. (2000) describe repressible and inducible systems using a Pip (pristinamycin-induced protein) repressor encoded by the streptogramin resistance operon of Streptomyces coelicolor, wherein the systems are responsive to streptogramin-type antibiotics (such as, for example, pristinamycin, virginiamycin, and Synercid). The Pip DNA-binding domain is fused to a VP16 transactivation domain or to the KRAB silencing domain, for example. The presence or absence of, for example, pristinamycin, regulates the PipON and PipOFF systems in their respective manners, as described therein.

(81) Another example of a promoter expression system useful for the modules and switches of the invention utilizes a quorum-sensing (referring to particular prokaryotic molecule communication systems having diffusible signal molecules that prevent binding of a repressor to an operator site, resulting in derepression of a target regulon) system. For example, Weber et al. (2003b) employ a fusion protein comprising the Streptomyces coelicolor quorum-sending receptor to a transactivating domain that regulates a chimeric promoter having a respective operator that the fusion protein binds. The expression is fine-tuned with non-toxic butyrolactones, such as SCB1 and MP133.

(82) In some embodiments, multiregulated, multigene gene expression systems that are functionally compatible with one another are utilized in the present invention (see, for example, Kramer et al. (2003)). For example, in Weber et al. (2002), the macrolide-responsive erythromycin resistance regulon system is used in conjunction with a streptogramin (PIP)-regulated and tetracycline-regulated expression systems.

(83) Other promoters responsive to non-heat stimuli can also be used. For example, the mortalin promoter is induced by low doses of ionizing radiation (Sadekova (1997) Int J Radiat Biol 72(6):653-660), the hsp27 promoter is activated by 17--estradiol and estrogen receptor agonists (Porter et al. (2001) J MoI Endocrinol 26(1):31-42), the HLA-G promoter is induced by arsenite, hsp promoters can be activated by photodynamic therapy (Luna et al. (2000) Cancer Res 60(6): 1637-1644). A suitable promoter can incorporate factors such as tissue-specific activation. For example, hsp70 is transcriptionally impaired in stressed neuroblastoma cells (Drujan & De Maio (1999) 12(6):443-448) and the mortalin promoter is up-regulated in human brain tumors (Takano et al. (1997) Exp Cell Res 237(1):38-45). A promoter employed in methods of the present invention can show selective up-regulation in tumor cells as described, for example, for mortalin (Takano et al. (1997) Exp Cell Res 237(1):38-45), hsp27 and calreticulin (Szewczenko-Pawlikowski et al. (1997) MoI Cell Biochem 177(1-2): 145-152; Yu et al. (2000) Electrophoresis 21(14):3058-3068)), grp94 and grp78 (Gazit et al. (1999) Breast Cancer Res Treat 54(2): 135-146), and hsp27, hsp70, hsp73, and hsp90 (Cardillo et al. (2000) Anticancer Res 20(6B):4579-4583; Strik et al. (2000) Anticancer Res 20(6B):4457-4552).

(84) In some embodiments, the promoter is a SOS-responsive promoter that allows the module to count the number of times that the SOS network is activated. In one embodiment, the promoter is an iron-responsive promoter that allows the module to count the number of times that iron is encountered.

(85) In some embodiments, the inducible promoter comprises an Anhydrotetracycline (aTc)-inducible promoter as provided in PLtetO-1 (Pubmed Nucleotide#U66309) with the sequence comprising GCATGCTCCCTATCAGTGATAGAGATTGACATCCCTATCAGTGATAGAGATACTGAG CACATCAGCAGGACGCACTGACCAGGA (SEQ ID NO: 33).

(86) In some embodiments, the inducible promoter is an arabinose-inducible promoter P.sub.BAD comprising the sequence AAGAAACCAATTGTCCATATTGCATCAGACATTGCCGTCACTGCGTCTTTTACTGGC TCTTCTCGCTAACCAAACCGGTAACCCCGCTTATTAAAAGCATTCTGTAACAAAGCG GGACCAAAGCCATGACAAAAACGCGTAACAAAAGTGTCTATAATCACGGCAGAAAA GTCCACATTGATTATTTGCACGGCGTCACACTTTGCTATGCCATAGCATTTTTATCCA TAAGATTAGCGGATCCTACCTGACGCTTTTTATCGCAACTCTCTACTGTTTCTCCATA (SEQ ID NO: 34).

(87) In some embodiments, the inducible promoter is an isopropyl -D-1-thiogalactopyranoside (IPTG) inducible promoter. In one embodiment, the IPTG-inducible promoter comprises the P.sub.TAC sequence found in the vector encoded by PubMed Accession ID #EU546824. In one embodiment, the IPTG-inducible promoter sequence comprises the P.sub.Trc-2 sequence CCATCGAATGGCTGAAATGAGCTGTTGACAATTAATCATCCGGCTCGTATAATGTGT GGAATTGTGAGCGGATAACAATTTCACACAGGA (SEQ ID NO: 35).

(88) In some embodiments, the IPTG-inducible promoter comprises the P.sub.Trc-2 sequence found in the vector encoded by PubMed Accession ID #EU546816.

(89) In some embodiments, the IPTG-inducible promoter comprises the P.sub.LlacO-1 sequence:ATAAATGTGAGCGGATAACATTGACATTGTGAGCGGATAACAAGATACTG AGCACTCAGCAGGACGCACTGACC (SEQ ID NO: 36).

(90) In some embodiments, the IPTG-inducible promoter comprises the P.sub.A1lacO-1 sequence AAAATTTATCAAAAAGAGTGTTGACTTGTGAGCGGATAACAATGATACTTAGATTCA ATTGTGAGCGGATAACAATTTCACACA (SEQ ID NO: 37).

(91) In some embodiments, the IPTG-inducible promoter comprises the P.sub.lac/ara-1 sequence CATAGCATTTTTATCCATAAGATTAGCGGATCCTAAGCTTTACAATTGTGAGCGCTC ACAATTATGATAGATTCAATTGTGAGCGGATAACAATTTCACACA (SEQ ID NO: 38).

(92) In some embodiments, the inducible promoter sequence comprises the P.sub.Ls1con sequence GCATGCACAGATAACCATCTGCGGTGATAAATTATCTCTGGCGGTGTTGACATAAAT ACCACTGGCGGTtATAaTGAGCACATCAGCAGG//GTATGCAAAGGA (SEQ ID NO: 39)

(93) Other non-limiting examples of promoters that are useful for use in the modules and engineered genetic counters described herein are presented in Tables 11-47.

(94) TABLE-US-00012 TABLE11 ExamplesofConstitutiveE.coli.sup.70Promoters Name Description PromoterSequence BBa_I14018 SEQIDNO:40P(Bla) ... gtttatacataggcgagtactctgttatgg BBa_I14033 SEQIDNO:41P(Cat) ... agaggttccaactttcaccataatgaaaca BBa_I14034 SEQIDNO:42P(Kat) ... taaacaactaacggacaattctacctaaca BBa_I732021 SEQIDNO:43TemplateforBuilding ... PrimerFamilyMember acatcaagccaaattaaacaggattaacac BBa_i742126 SEQIDNO:44ReverselambdacI-regulated ... promoter gaggtaaaatagtcaacacgcacggtgtta BBa_J01006 SEQIDNO:45KeyPromoterabsorbs3 ... caggccggaataactccctataatgcgcca BBa_J23100 SEQIDNO:46constitutivepromoterfamily ... member ggctagctcagtcctaggtacagtgctagc BBa_J23101 SEQIDNO:47constitutivepromoterfamily ... member agctagctcagtcctaggtattatgctagc BBa_J23102 SEQIDNO:48constitutivepromoterfamily ... member agctagctcagtcctaggtactgtgctagc BBa_J23103 SEQIDNO:49constitutivepromoterfamily ... member agctagctcagtcctagggattatgctagc BBa_J23104 SEQIDNO:50constitutivepromoterfamily ... member agctagctcagtcctaggtattgtgctagc BBa_J23105 SEQIDNO:51constitutivepromoterfamily ... member ggctagctcagtcctaggtactatgctagc BBa_J23106 SEQIDNO:52constitutivepromoterfamily ... member ggctagctcagtcctaggtatagtgctagc BBa_J23107 SEQIDNO:53constitutivepromoterfamily ... member ggctagctcagccctaggtattatgctagc BBa_J23108 SEQIDNO:54constitutivepromoterfamily ... member agctagctcagtcctaggtataatgctagc BBa_J23109 SEQIDNO:55constitutivepromoterfamily ... member agctagctcagtcctagggactgtgctagc BBa_J23110 SEQIDNO:56constitutivepromoterfamily ... member ggctagctcagtcctaggtacaatgctagc BBa_J23111 SEQIDNO:57constitutivepromoterfamily ... member ggctagctcagtcctaggtatagtgctagc BBa_J23112 SEQIDNO:58constitutivepromoterfamily ... member agctagctcagtcctagggattatgctagc BBa_J23113 SEQIDNO:59constitutivepromoterfamily ... member ggctagctcagtcctagggattatgctagc BBa_J23114 SEQIDNO:60constitutivepromoterfamily ... member ggctagctcagtcctaggtacaatgctagc BBa_J23115 SEQIDNO:61constitutivepromoterfamily ... member agctagctcagcccttggtacaatgctagc BBa_J23116 SEQIDNO:62constitutivepromoterfamily ... member agctagctcagtcctagggactatgctagc BBa_J23117 SEQIDNO:63constitutivepromoterfamily ... member agctagctcagtcctagggattgtgctagc BBa_J23118 SEQIDNO:64constitutivepromoterfamily ... member ggctagctcagtcctaggtattgtgctagc BBa_J23119 SEQIDNO:65constitutivepromoterfamily ... member agctagctcagtcctaggtataatgctagc BBa_J23150 SEQIDNO:661bpmutantfromJ23107 ... ggctagctcagtcctaggtattatgctagc BBa_J23151 SEQIDNO:671bpmutantfromJ23114 ... ggctagctcagtcctaggtacaatgctagc BBa_J44002 SEQIDNO:68pBADreverse ... aaagtgtgacgccgtgcaaataatcaatgt BBa_J48104 SEQIDNO:69NikRpromoter,aproteinof ...gacgaatacttaaaatcgtcatacttattt theribbonhelix-helixfamilyoftranscription factorsthatrepressexpre BBa_J54200 SEQIDNO:70lacq_Promoter ... aaacctttcgcggtatggcatgatagcgcc BBa_J56015 SEQIDNO:71lacIQ-promotersequence ... tgatagcgcccggaagagagtcaattcagg BBa_J64951 SEQIDNO:72E.coliCreABCDphosphate ... sensingoperonpromoter ttatttaccgtgacgaactaattgctcgtg BBa_K088007 SEQIDNO:73GlnRSpromoter ...catacgccgttatacgttgtttacgctttg BBa_K119000 SEQIDNO:74Constitutiveweakpromoter ... oflacZ ttatgcttccggctcgtatgttgtgtggac BBa_K119001 SEQIDNO:75MutatedLacZpromoter ... ttatgcttccggctcgtatggtgtgtggac BBa_K137029 SEQIDNO:76constitutivepromoterwith ...atatatatatatatataatggaagcgtttt (TA)10between10and35elements BBa_K137030 SEQIDNO:77constitutivepromoterwith ...atatatatatatatataatggaagcgtttt (TA)9between10and35elements BBa_K137031 SEQIDNO:78constitutivepromoterwith ... (C)10between10and35elements ccccgaaagcttaagaatataattgtaagc BBa_K137032 SEQIDNO:79constitutivepromoterwith ... (C)12between10and35elements ccccgaaagcttaagaatataattgtaagc BBa_K137085 SEQIDNO:80optimized(TA)repeat ...tgacaatatatatatatatataatgctagc constitutivepromoterwith13bpbetween 10and35elements BBa_K137086 SEQIDNO:81optimized(TA)repeat ...acaatatatatatatatatataatgctagc constitutivepromoterwith15bpbetween 10and35elements BBa_K137087 SEQIDNO:82optimized(TA)repeat ...aatatatatatatatatatataatgctagc constitutivepromoterwith17bpbetween 10and35elements BBa_K137088 SEQIDNO:83optimized(TA)repeat ...tatatatatatatatatatataatgctagc constitutivepromoterwith19bpbetween 10and35elements BBa_K137089 SEQIDNO:84optimized(TA)repeat ...tatatatatatatatatatataatgctagc constitutivepromoterwith21bpbetween 10and35elements BBa_K137090 SEQIDNO:85optimized(A)repeat ... constitutivepromoterwith17bpbetween aaaaaaaaaaaaaaaaaatataatgctagc BBa_K137091 SEQIDNO:86optimized(A)repeat ... constitutivepromoterwith18bpbetween aaaaaaaaaaaaaaaaaatataatgctagc 10and35elements BBa_K256002 SEQIDNO:87J23101:GFP ... caccttcgggtgggcctttctgcgtttata BBa_K256018 SEQIDNO:88J23119:IFP ... caccttcgggtgggcctttctgcgtttata BBa_K256020 SEQIDNO:89J23119:HO1 ... caccttcgggtgggcctttctgcgtttata BBa_K256033 SEQIDNO:90Infraredsignalreporter ... (J23119:IFP:J23119:HO1) caccttcgggtgggcctttctgcgtttata BBa_K292000 SEQIDNO:91Doubleterminator+ ... constitutivepromoter ggctagctcagtcctaggtacagtgctagc BBa_K292001 SEQIDNO:92Doubleterminator+ ... Constitutivepromoter+ StrongRBS tgctagctactagagattaaagaggagaaa BBa_M13101 SEQIDNO:93Ml3K07geneIpromoter ...cctgtttttatgttattctctctgtaaagg BBa_M13102 SEQIDNO:94M13K07geneIIpromoter ...aaatatttgcttatacaatcttcctgtttt BBa_M13103 SEQIDNO:95M13K07geneIIIpromoter ... gctgataaaccgatacaattaaaggctcct BBa_M13104 SEQIDNO:96M13K07geneIVpromoter ...ctcttctcagcgtcttaatctaagctatcg BBa_M13105 SEQIDNO:97M13K07geneVpromoter ... atgagccagttcttaaaatcgcataaggta BBa_M13106 SEQIDNO:98M13K07geneVIpromoter ...ctattgattgtgacaaaataaacttattcc BBa_M13108 SEQIDNO:99M13K07geneVIII ... promoter gtttcgcgcttggtataatcgctgggggtc BBa_M13110 SEQIDNO:100M13110 ... ctttgcttctgactataatagtcagggtaa BBa_M31519 SEQIDNO:101Modifiedpromoter ... sequenceofg3. aaaccgatacaattaaaggctcctgctagc BBa_R1074 SEQIDNO:102ConstitutivePromoterI ... gccggaataactccctataatgcgccacca BBa_R1075 SEQIDNO:103ConstitutivePromoterII ... gccggaataactccctataatgcgccacca BBa_503331 SEQIDNO:104 ttgacaagcttttcctcagctccgtaaact

(95) TABLE-US-00013 TABLE12 ExamplesofConstitutiveE.coli.sup.70Promoters Identifier Sequence BBa_J23119 SEQIDNO:105 ttgacagctagctcagtcctaggtataatgctagc n/a BBa_J23100 SEQIDNO:106 ttgacggctagctcagtcctaggtacagtgctagc 1 BBa_J23101 SEQIDNO:107 tttacagctagctcagtcctaggtattatgctagc 0.70 BBa_J23102 SEQIDNO:108 ttgacagctagctcagtcctaggtactgtgctagc 0.86 BBa_J23103 SEQIDNO:109 ctgatagctagctcagtcctagggattatgctagc 0.01 BBa_J23104 SEQIDNO:110 ttgacagctagctcagtcctaggtattgtgctagc 0.72 BBa_J23105 SEQIDNO:111 tttacggctagctcagtcctaggtactatgctagc 0.24 BBa_J23106 SEQIDNO:112 tttacggctagctcagtcctaggtatagtgctagc 0.47 BBa_J23107 SEQIDNO:113 tttacggctagctcagccctaggtattatgctagc 0.36 BBa-J23108 SEQIDNO:114 ctgacagctagctcagtcctaggtataatgctagc 0.51 BBa_J23109 SEQIDNO:115 tttacagctagctcagtcctagggactgtgctagc 0.04 BBa_J23110 SEQIDNO:116 tttacggctagctcagtcctaggtacaatgctagc 0.33 BBa_J23111 SEQIDNO:117 ttgacggctagctcagtcctaggtatagtgctagc 0.58 BBa_J23112 SEQIDNO:118 ctgatagctagctcagtcctagggattatgctagc 0.00 BBa_J23113 SEQIDNO:119 ctgatggctagctcagtcctagggattatgctagc 0.01 BBa_J23114 SEQIDNO:120 tttatggctagctcagtcctaggtacaatgctagc 0.10 BBa_J23115 SEQIDNO:121 tttatagctagctcagcccttggtacaatgctagc 0.15 BBa_J23116 SEQIDNO:122 ttgacagctagctcagtcctagggactatgctagc 0.16 BBa_J23117 SEQIDNO:123 ttgacagctagctcagtcctagggattgtgctagc 0.06 BBa_J23118 SEQIDNO:124 ttgacggctagctcagtcctaggtattgtgctagc 0.56

(96) TABLE-US-00014 TABLE13 ExamplesofConstitutiveE.coli.sup.sPromoters Name Description PromoterSequence BBa_J45992 SEQIDNO:125 ... Full-lengthstationary ggtttcaaaattgtgatctatatttaacaa phaseosmYpromoter BBa_J45993 SEQIDNO:126 ... Minimalstationary ggtttcaaaattgtgatctatatttaacaa phaseosmYpromoter

(97) TABLE-US-00015 TABLE14 ExamplesofConstitutiveE.coli.sup.32Promoters Name Description PromoterSequence BBa_J45504 SEQIDNO:127 ... htpGHeatShock tctattccaataaagaaatcttcctgcgtg Promoter

(98) TABLE-US-00016 TABLE15 ExamplesofConstitutiveB.subtilis.sup.APromoters Name Description PromoterSequence BBa_K143012 SEQIDNO:128 ... Promotervegacon- aaaaatgggctcgtgttgtacaataaatgt stitutivepromoter forB.subtilis BBa_K143013 SEQIDNO:129 ... Promoter43acon- aaaaaaagcgcgcgattatgtaaaatataa stitutivepromoter forB.subtilis

(99) TABLE-US-00017 TABLE16 ExamplesofConstitutiveB.subtilis.sup.BPromoters Name Description PromoterSequence BBa_K143010 SEQIDNO:130 ... PromoterctcforB. atccttatcgttatgggtattgtttgtaat subtilis BBa_K143011 SEQIDNO:131 ... PromotergsiBforB. taaaagaattgtgagcgggaatacaacaac subtilis BBa_K143013 SEQIDNO:132 ... Promoter43acon- aaaaaaagcgcgcgattatgtaaaatataa stitutivepromoter forB.subtilis

(100) TABLE-US-00018 TABLE17 ExamplesofConstitutivePromotersfromMiscellaneousProkaryotes Name Description PromoterSequence BBa_K112706 SEQIDNO:133 ...tacaaaataattcccctgcaaacattatca Pspv2fromSalmonella BBa_K112707 SEQIDNO:134 ...tacaaaataattcccctgcaaacattatcg PspvfromSalmonella

(101) TABLE-US-00019 TABLE18 ExamplesofConstitutivePromotersfrombacteriophageT7 Name Description PromoterSequence BBa_I712074 SEQIDNO:135 ... T7promoter(strong agggaatacaagctacttgttctttttgca promoterfromT7 bacteriophage) BBa_I719005 SEQIDNO:136 taatacgactcactatagggaga T7Promoter BBa_J34814 SEQIDNO:137 gaatttaatacgactcactatagggaga T7Promoter BBa_J64997 SEQIDNO:138 taatacgactcactatagg 7consensus-10andrest BBa_K113010 SEQIDNO:139 ... overlappingT7promoter gagtcgtattaatacgactcactatagggg BBa_K113011 SEQIDNO:140 ... moreoverlappingT7 agtgagtcgtactacgactcactatagggg promoter BBa_K113012 SEQIDNO:141 ... weakenoverlapping gagtcgtattaatacgactctctatagggg T7promoter BBa_R0085 SEQIDNO:142 taatacgactcactatagggaga T7ConsensusPromoter Sequence BBa_R0180 SEQIDNO:143 ttatacgactcactatagggaga T7RNAPpromoter BBa_R0181 SEQIDNO:144 gaatacgactcactatagggaga T7RNAPpromoter BBa_R0182 SEQIDNO:145 taatacgtctcactatagggaga T7RNAPpromoter BBa_R0183 SEQIDNO:146 tcatacgactcactatagggaga T7RNAPpromoter BBa_Z0251 SEQIDNO:147 ... T7strongpromoter taatacgactcactatagggagaccacaac BBa_Z0252 SEQIDNO:148 ... T7weakbindingand taattgaactcactaaagggagaccacagc processivity BBa_Z0253 SEQIDNO:149 ... T7weakbinding cgaagtaatacgactcactattagggaaga promoter SEQIDNO:150 attaaccctcactaaagggaga T714.3m

(102) TABLE-US-00020 TABLE19 ExamplesofConstitutivePromotersfrom bacteriophageSP6 Name Description PromoterSequence BBa_J64998 SEQIDNO:151 atttaggtgacactataga consensus 10andrest fromSP6

(103) TABLE-US-00021 TABLE20 ExamplesofConstitutivePromotersfromYeast Name Description PromoterSequence BBa_I766555 SEQIDNO:152 ... pCyc(Medium)Promoter acaaacacaaatacacacactaaattaata BBa_I766556 SEQIDNO:153 ... pAdh(Strong)Promoter ccaagcatacaatcaactatctcatataca BBa_I766557 SEQIDNO:154 ... pSte5(Weak)Promoter gatacaggatacagcggaaacaacttttaa BBa_J63005 SEQIDNO:155 ... yeastADH1promoter tttcaagctataccaagcatacaatcaact BBa_K105027 SEQIDNO:156 ...cctttgcagcataaattactatacttctat cycl00minimalpromoter BBa_K105028 SEQIDNO:157 ...cctttgcagcataaattactatacttctat cyc70minimalpromoter BBa_K105029 SEQIDNO:158 ...cctttgcagcataaattactatacttctat cyc43minimalpromoter BBa_K105030 SEQIDNO:159 ...cctttgcagcataaattactatacttctat cyc28minimalpromoter BBa_K105031 SEQIDNO:160 ...cctttgcagcataaattactatacttctat cycl6minimalpromoter BBa_K122000 SEQIDNO:161 ...ttatctactttttacaacaaatataaaaca pPGK1 BBa_K124000 SEQIDNO:162 ... pCYCYeastPromoter acaaacacaaatacacacactaaattaata BBa_K124002 SEQIDNO:163 ... YeastGPD(TDH3) gtttcgaataaacacacataaacaaacaaa Promoter BBa_M31201 SEQIDNO:164 ... YeastCLB1promoter accatcaaaggaagctttaatcttctcata region,G2/Mcell cyclespecific

(104) TABLE-US-00022 TABLE21 ExamplesofConstitutivePromotersfromMiscellaneous Eukaryotes Name Description PromoterSequence BBa_I712004 SEQIDNO:165 ...agaacccactgcttactggcttatcgaaat CMVpromoter BBa_K076017 SEQIDNO:166 ...ggccgtttttggcttttttgttagacgaag UbcPromoter

(105) TABLE-US-00023 TABLE22 ExamplesofCellSignalingPromoters Name Description PromoterSequence BBa_I1051 SEQIDNO:167 ... Luxcassetteright tgttatagtcgaatacctctggcggtgata promoter BBa_I14015 SEQIDNO:168 ... P(Las)TetO ttttggtacactccctatcagtgatagaga BBa_I14016 SEQIDNO:169 ... P(Las)CIO ctttttggtacactacctctggcggtgata BBa_I14017 SEQIDNO:170 ... P(Rhl) tacgcaagaaaatggtttgttatagtcgaa BBa_I739105 SEQIDNO:171 ... DoublePromoter cgtgcgtgttgataacaccgtgcgtgttga (LuxR/HSL,positive/ cI,negative) BBa_I746104 SEQIDNO:172 ... P2promoterin agattgtactaaatcgtataatgacagtga agroperon fromS.aureus BBa_I751501 SEQIDNO:173 ... plux-cIhybrid gtgttgatgcttttatcaccgccagtggta promoter BBa_I751502 SEQIDNO:174 ... plux-lachybrid agtgtgtggaattgtgagcggataacaatt promoter BBa_I761011 SEQIDNO:175 ...acatcttaaaagttttagtatcatattcgt CinR,CinLand glucosecon- trolledpromoter BBa_J06403 SEQIDNO:176 ... RhIRpromoter tacgcaagaaaatggtttgttatagtcgaa repressible byCI BBa_J64000 SEQIDNO:177 ...atcctcctttagtcttccccctcatgtgtg rhlIpromoter BBa_J64010 SEQIDNO:178 ...taaaattatgaaatttgcataaattcttca lasIpromoter BBa_J64067 SEQIDNO:179 ... LuxR+ 3OC6HSL gtgttgactattttacctctggcggtgata independentR0065 BBa_J64712 SEQIDNO:180 ... LasR/LasIIndu- gaaatctggcagtttttggtacacgaaagc cible&RHLR/ RHLIrepressible Promoter BBa_K091107 SEQIDNO:181 ... Lux/cIHybrid acaccgtgcgtgttgatatagtcgaataaa Promoter BBa_K091117 SEQIDNO:182 ...aaaattatgaaatttgtataaattcttcag pLaspromoter BBa_K091143 SEQIDNO:183 ... pLas/cIHybrid ggttctttttggtacctctggcggtgataa Promoter BBa_K091146 SEQIDNO:184 ... pLas/LuxHybrid tgtaggatcgtacaggtataaattcttcag Promoter BBa_K091156 SEQIDNO:185 ... pLux caagaaaatggtttgttatagtcgaataaa BBa_K091157 SEQIDNO:186 ...ctatctcatttgctagtatagtcgaataaa pLux/LasHybrid Promoter BBa_K145150 SEQIDNO:187 ... Hybridpromoter: tagtttataatttaagtgttctttaatttc HSL-LuxRactivated, P22C2repressed BBa_K266000 SEQIDNO:188 ... PAI+ LasR-> LuxI caccttcgggtgggcctttctgcgtttata (AI) BBa_K266005 SEQIDNO:189 ... PAI+ LasR-> LasI& aataactctgatagtgctagtgtagatctc AI+ LuxR--ILasI BBa_K266006 SEQIDNO:190 ... PAI+ LasR-> LasI+ caccttcgggtgggcctttctgcgtttata GFP&AI+ LuxR--I LasI+ GFP BBa_K266007 SEQIDNO:191 ... ComplexQS-> caccttcgggtgggcctttctgcgtttata LuxI&LasI circuit BBa_R0061 SEQIDNO:192 ttgacacctgtaggatcgtacaggtataat Promoter(HSL- mediatedluxR repressor) BBa_R0062 SEQIDNO:193 ... Promoter(luxR& caagaaaatggtttgttatagtcgaataaa HSLregu- lated--luxpR) BBa_R0063 SEQIDNO:194 ... Promoter(luxR& cacgcaaaacttgcgacaaacaataggtaa HSLregu- lated--luxpL) BBa_R0071 SEQIDNO:195 ... Promoter(RhlR& gttagctttcgaattggctaaaaagtgttc C4-HSL regulated) BBa_R0078 SEQIDNO:196 ... Promoter(cinRand ccattctgctttccacgaacttgaaaacgc HSLregulated) BBa_R0079 SEQIDNO:197 ... Promoter(LasR& ggccgcgggttctttttggtacacgaaagc PAIregulated) BBa_R1062 SEQIDNO:198 ... Promoter,Standard aagaaaatggtttgttgatactcgaataaa (luxRandHSL regulated-- luxpR)

(106) TABLE-US-00024 TABLE23 ExamplesofMetalInduciblePromoters Name Description PromoterSequence BBa_I721001 SEQIDNO:199 ...gaaaaccttgtcaatgaagagcgatctatg LeadPromoter BBa_I731004 SEQIDNO:200 ...ttctcgttcgactcatagctgaacacaaca FecApromoter BBa_I760005 SEQIDNO:201 atgacaaaattgtcat Cu-sensitive promoter BBa_I765000 SEQIDNO:202 ... Fepromoter accaatgctgggaacggccagggcacctaa BBa_I765007 SEQIDNO:203 ...ctgaaagcgcataccgctatggagggggtt FeandUV promoters BBa_J3902 SEQIDNO:204 ...tagatatgcctgaaagcgcataccgctatg PrFe(PI+ PII rusoperon)

(107) TABLE-US-00025 TABLE24 ExamplesofT7Promoters Name Description PromoterSequence BBa_I712074 SEQIDNO:205 ...agggaatacaagctacttgttctttttgca T7promoter(strong promoterfromT7 bacteriophage) BBa_I719005 SEQIDNO:206 taatacgactcactatagggaga T7Promoter BBa_J34814 SEQIDNO:207 gaatttaatacgactcactatagggaga T7Promoter BBa_J64997 SEQIDNO:208 taatacgactcactatagg T7consensus 10andrest BBa_J64998 SEQIDNO:209 atttaggtgacactataga consensus10and restfromSP6 BBa_K113010 SEQIDNO:210 ... overlappingT7 gagtcgtattaatacgactcactatagggg promoter BBa_K113011 SEQIDNO:211 ... moreoverlapping agtgagtcgtactacgactcactatagggg T7promoter BBa_K113012 SEQIDNO:212 ... weakenoverlapping gagtcgtattaatacgactctctatagggg T7promoter BBa_R0085 SEQIDNO:213 taatacgactcactatagggaga T7Consensus PromoterSequence BBa_R0180 SEQIDNO:214 ttatacgactcactatagggaga T7RNAPpromoter BBa_R0181 SEQIDNO:215 gaatacgactcactatagggaga T7RNAPpromoter BBa_R0182 SEQIDNO:216 taatacgtctcactatagggaga T7RNAPpromoter BBa_R0183 SEQIDNO:217 tcatacgactcactatagggaga T7RNAPpromoter BBa_R0184 SEQIDNO:218 ... T7promoter(lacI ataggggaattgtgagcggataacaattcc repressible) BBa_R0185 SEQIDNO:219 ... T7promoter(lacI ataggggaattgtgagcggataacaattcc repressible) BBa_R0186 SEQIDNO:220 ... T7promoter(lacI ataggggaattgtgagcggataacaattcc repressible) BBa_R0187 SEQIDNO:221 ... T7promoter(lacI ataggggaattgtgagcggataacaattcc repressible) BBa_Z0251 SEQIDNO:222 ... T7strong taatacgactcactatagggagaccacaac promoter BBa_Z0252 SEQIDNO:223 ... T7weakbindingand taattgaactcactaaagggagaccacagc processivity BBa_Z0253 SEQIDNO:224 ... T7weakbinding cgaagtaatacgactcactattagggaaga promoter

(108) TABLE-US-00026 TABLE25 ExamplesofStressKitPromoters Name Description PromoterSequence BBa_K086017 SEQIDNO:225 ... unmodifiedLutz-Bujard ttgtgagcggataacaagatactgagcaca LacOpromoter BBa_K086018 SEQIDNO:226 ... modifiedLutz-Bujard ttgtgagcggataacaattctgaagaacaa LacOpromoter,with alternativesigma factor24 BBa_K086019 SEQIDNO:227 ... modifiedLutz-Bujard ttgtgagcggataacaattctgataaaaca LacOpromoter,with alternativesigma factor24 BBa_K086020 SEQIDNO:228 ... modifiedLutz-Bujard ttgtgagcggataacatctaaccctttaga LacOpromoter,with alternativesigma factor24 BBa_K086021 SEQIDNO:229 ... modifiedLutz-Bujard ttgtgagcggataacatagcagataagaaa LacOpromoter,with alternativesigma factor24 BBa_K086022 SEQIDNO:230 ... modifiedLutz-Bujard gtttgagcgagtaacgccgaaaatcttgca LacOpromoter,with alternativesigma factor28 BBa_K086023 SEQIDNO:231 ... modifiedLutz-Bujard gtgtgagcgagtaacgacgaaaatcttgca LacOpromoter,with alternativesigma factor28 BBa_K086024 SEQIDNO:232 ... modifiedLutz-Bujard tttgagcgagtaacagccgaaaatcttgca LacOpromoter,with alternativesigma factor28 BBa_K086025 SEQIDNO:233 ... modifiedLutz-Bujard tgtgagcgagtaacagccgaaaatcttgca LacOpromoter,with alternativesigma factor28 BBa_K086026 SEQIDNO:234 ... modifiedLutz-Bujard ttgtgagcgagtggcaccattaagtacgta LacOpromoter,with alternativesigma factor32 BBa_K086027 SEQIDNO:235 ... modifiedLutz-Bujard ttgtgagcgagtgacaccattaagtacgta LacOpromoter,with alternativesigma factor32 BBa_K086028 SEQIDNO:236 ... modifiedLutz-Bujard ttgtgagcgagtaacaccattaagtacgta LacOpromoter,with alternativesigma factor32 BBa_K086029 SEQIDNO:237 ... modifiedLutz-Bujard ttgtgagcgagtaacaccattaagtacgta LacOpromoter,with alternativesigma factor32 BBa_K086030 SEQIDNO:238 ... modifiedLutz-Bujard cagtgagcgagtaacaactacgctgtttta LacOpromoter,with alternativesigma factor38 BBa_K086031 SEQIDNO:239 ... modifiedLutz-Bujard cagtgagcgagtaacaactacgctgtttta LacOpromoter,with alternativesigma factor38 BBa_K086032 SEQIDNO:240 ... modifiedLutz-Bujard atgtgagcggataacactataattaataga LacOpromoter,with alternativesigma factor38 BBa_K086033 SEQIDNO:241 ... modifiedLutz-Bujard atgtgagcggataacactataattaataga LacOpromoter,with alternativesigma factor38

(109) TABLE-US-00027 TABLE26 ExamplesofLogicPromoters Name Description PromoterSequence BBa_I732200 SEQIDNO:242 ... NOTGatePromoter gaattgtgagcggataacaattggatccgg FamilyMember (D001O1wt1) BBa_I732201 SEQIDNO:243 ... NOTGatePromoter ggaattgtgagcgctcacaattggatccgg FamilyMember (D001O11) BBa_I732202 SEQIDNO:244 ... NOTGatePromoter ggaattgtaagcgcttacaattggatccgg FamilyMember (D001O22) BBa_I732203 SEQIDNO:245 ... NOTGatePromoter ggaattgtaaacgtttacaattggatccgg FamilyMember (D001O33) BBa_I732204 SEQIDNO:246 ... NOTGatePromoter ggaattgtgaacgttcacaattggatccgg FamilyMember (D001O44) BBa_I732205 SEQIDNO:247 ... NOTGatePromoter ggaattttgagcgctcaaaattggatccgg FamilyMember (D001O55) BBa_I732206 SEQIDNO:248 ... NOTGatePromoter ggaattatgagcgctcataattggatccgg FamilyMember (D001O66) BBa_I732207 SEQIDNO:249 ... NOTGatePromoter gggacgactgtatacagtcgtcggatccgg FamilyMember (D001O77) BBa_I732270 SEQIDNO:250 ... PromoterFamily ggaattgtgagcgcttacaattggatccgg Memberwith HybridOperator (D001O12) BBa_I732271 SEQIDNO:251 ... PromoterFamily ggaattgtgagcgctcataattggatccgg Memberwith HybridOperator (D001O16) BBa_I732272 SEQIDNO:252 ... PromoterFamily ggaattgtgagctacagtcgtcggatccgg Memberwith HybridOperator (D001O17) BBa_I732273 SEQIDNO:253 ... PromoterFamily ggaattgtaagcgctcacaattggatccgg Memberwith HybridOperator (D001O21) BBa_I732274 SEQIDNO:254 ... PromoterFamily ggaattgtaagcgttcacaattggatccgg Memberwith HybridOperator (D001O24) BBa_I732275 SEQIDNO:255 ... PromoterFamily ggaattgtaagcgctcataattggatccgg Memberwith HybridOperator (D001O26) BBa_I732276 SEQIDNO:256 ... PromoterFamily ggaattgtaagctacagtcgtcggatccgg Memberwith HybridOperator (D001O27) BBa_I732277 SEQIDNO:257 ... PromoterFamily ggaattgtgaacgctcataattggatccgg Memberwith HybridOperator (D001O46) BBa_I732278 SEQIDNO:258 ... PromoterFamily ggaattgtgaactacagtcgtcggatccgg Memberwith HybridOperator (D001O47) BBa_I732279 SEQIDNO:259 ... PromoterFamily ggaattatgagcgctcacaattggatccgg Memberwith HybridOperator (D001O61) BBa_I732301 SEQIDNO:260 ... NANDCandidate ggaattgtgagcgctcataattggatccgg (U073O26D001O16) BBa_I732302 SEQIDNO:261 ... NANDCandidate ggaattgtgagctacagtcgtcggatccgg (U073O27D001O17) BBa_I732303 SEQIDNO:262 ... NANDCandidate ggaattgtgaacgctcataattggatccgg (U073O22D001O46) BBa_I732304 SEQIDNO:263 ... NANDCandidate ggaattgtgaactacagtcgtcggatccgg (U073O22D001O47) BBa_I732305 SEQIDNO:264 ... NANDCandidate taaattgtgaacgctcataattggatccgg (U073O22D059O46) BBa_I732306 SEQIDNO:265 ... NANDCandidate gaaattgtaagcgcttacaattggatccgg (U073O11D002O22) BBa_I732351 SEQIDNO:266 ... NORCandidate gaaattgtaagcgcttacaattggatccgg (U037O11D002O22) BBa_I732352 SEQIDNO:267 ... NORCandidate ggaattgtaagcgcttacaattggatccgg (U035O44D001O22) BBa_I732400 SEQIDNO:268 PromoterFamily ... Member(U097NUL+ gccaaattaaacaggattaacaggatccgg D062NUL) BBa_I732401 SEQIDNO:269 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U097O11+ D062NUL) BBa_I732402 SEQIDNO:270 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U085O11+ D062NUL) BBa_I732403 SEQIDNO:271 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U073O11+ D062NUL) BBa_I732404 SEQIDNO:272 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U061O11+ D062NUL) BBa_I732405 SEQIDNO:273 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U049O11+ D062NUL) BBa_I732406 SEQIDNO:274 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U037O11+ D062NUL) BBa_I732407 SEQIDNO:275 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U097NUL+ D002O22) BBa_I732408 SEQIDNO:276 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U097NUL+ D014O22) BBa_I732409 SEQIDNO:277 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U097NUL+ D026O22) BBa_I732410 SEQIDNO:278 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U097NUL+ D038O22) BBa_I732411 SEQIDNO:279 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U097NUL+ D050O22) BBa_I732412 SEQIDNO:280 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U097NUL+ D062O22) BBa_I732413 SEQIDNO:281 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U097O11+ D002O22) BBa_I732414 SEQIDNO:282 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U097O11+ D014O22) BBa_I732415 SEQIDNO:283 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U097O11+ D026O22) BBa_I732416 SEQIDNO:284 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U097O11+ D038O22) BBa_I732417 SEQIDNO:285 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U097O11+ D050O22) BBa_I732418 SEQIDNO:286 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U097O11+ D062O22) BBa_I732419 SEQIDNO:287 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U085O11+ D002O22) BBa_I732420 SEQIDNO:288 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U085O11+ D014O22) BBa_I732421 SEQIDNO:289 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U085O11+ D026O22) BBa_I732422 SEQIDNO:290 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U085O11+ D038O22) BBa_I732423 SEQIDNO:291 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U085O11+ D050O22) BBa_I732424 SEQIDNO:292 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U085O11+ D062O22) BBa_I732425 SEQIDNO:293 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U073O11+ D002O22) BBa_I732426 SEQIDNO:294 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U073O11+ D014O22) BBa_I732427 SEQIDNO:295 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U073O11+ D026O22) BBa_I732428 SEQIDNO:296 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U073O11+ D038O22) BBa_I732429 SEQIDNO:297 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U073O11+ D050O22) BBa_I732430 SEQIDNO:298 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U073O11+ D062O22) BBa_I732431 SEQIDNO:299 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U061O11+ D002O22) BBa_I732432 SEQIDNO:300 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U061O11+ D014O22) BBa_I732433 SEQIDNO:301 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U061O11+ D026O22) BBa_I732434 SEQIDNO:302 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U061O11+ D038O22) BBa_I732435 SEQIDNO:303 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U061O11+ D050O22) BBa_I732436 SEQIDNO:304 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U061O11+ D062O22) BBa_I732437 SEQIDNO:305 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U049O11+ D002O22) BBa_I732438 SEQIDNO:306 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U049O11+ D014O22) BBa_I732439 SEQIDNO:307 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U049O11+ D026O22) BBa_I732440 SEQIDNO:308 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U049O11+ D038O22) BBa_I732441 SEQIDNO:309 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U049O11+ D050O22) BBa_I732442 SEQIDNO:310 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U049O11+ D062O22) BBa_I732443 SEQIDNO:311 ... PromoterFamily gaaattgtaagcgcttacaattggatccgg Member(U037O11+ D002O22) BBa_I732444 SEQIDNO:312 ... PromoterFamily taaattgtaagcgcttacaattggatccgg Member(U037O11+ D014O22) BBa_I732445 SEQIDNO:313 ... PromoterFamily gtaattgtaagcgcttacaattggatccgg Member(U037O11+ D026O22) BBa_I732446 SEQIDNO:314 ... PromoterFamily tcaattgtaagcgcttacaattggatccgg Member(U037O11+ D038O22) BBa_I732447 SEQIDNO:315 ... PromoterFamily aaaattgtaagcgcttacaattggatccgg Member(U037O11+ D050O22) BBa_I732448 SEQIDNO:316 ... PromoterFamily caaattgtaagcgcttacaattggatccgg Member(U037O11+ D062O22) BBa_I732450 SEQIDNO:317 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U073O26+ D062NUL) BBa_I732451 SEQIDNO:318 ... PromoterFamily gccaaattaaacaggattaacaggatccgg Member(U073O27+ D062NUL) BBa_I732452 SEQIDNO:319 ... PromoterFamily caaattatgagcgctcacaattggatccgg Member(U073O26+ D062O61)

(110) TABLE-US-00028 TABLE27 ExamplesofPositivelyRegulatedE.coli70Promoters Name Description PromoterSequence BBa_I0500 SEQIDNO:320 ...gtttctccatacccgtttttttgggctagc InduciblepBad/araC promoter BBa_I1051 SEQIDNO:321 ...tgttatagtcgaatacctctggcggtgata Luxcassetteright promoter BBa_I12006 SEQIDNO:322 ...attacaaactttcttgtatagatttaacgt ModifiedlamdbaPrm promoter(repressed by434cI) BBa_I12007 SEQIDNO:323 ...atttataaatagtggtgatagatttaacgt ModifiedlambdaPrm promoter(OR-3 obliterated) BBa_I12036 SEQIDNO:324 ...tttcttgtatagatttacaatgtatcttgt ModifiedlamdbaPrm promoter(cooperative repressionby434cI) BBa_I12040 SEQIDNO:325 ...tttcttgtagatacttacaatgtatcttgt Modifiedlambda P(RM)promoter: 10regionfrom P(L)andcoopera- tivelyrepressed by434cI BBa_I12210 SEQIDNO:326 ...ctttatgcttccggctcgtatgttgtgtgg placOr2-62 (positive) BBa_I13406 SEQIDNO:327 ...ttttttgggctagcaagctttaccatggat Pbad/AraCwith extraRENsites BBa_I13453 SEQIDNO:328 ...tgtttctccataccgtttttttgggctagc Pbadpromoter BBa_I14015 SEQIDNO:329 ...ttttggtacactccctatcagtgatagaga P(Las)TetO BBa_I14016 SEQIDNO:330 ...ctttttggtacactacctctggcggtgata P(Las)CIO BBa_I14017 SEQIDNO:331 ...tacgcaagaaaatggtttgttatagtcgaa P(Rhl) BBa_I721001 SEQIDNO:332 ...gaaaaccttgtcaatgaagagcgatctatg LeadPromoter BBa_I723020 SEQIDNO:333 ...ctcaaagcgggccagccgtagccgttacgc Pu BBa_I731004 SEQIDNO:334 ...ttctcgttcgactcatagctgaacacaaca FecApromoter BBa_I739104 SEQIDNO:335 ...gttctttaattatttaagtgttctttaatt DoublePromoter (LuxR/HSL,positive/ P22cII,negative) BBa_I739105 SEQIDNO:336 ...cgtgcgtgttgataacaccgtgcgtgttga DoublePromoter (LuxR/HSL,positive/ cI,negative) BBa_I741018 SEQIDNO:337 ...gttacgtttatcgcggtgattgttacttat Rightfacingpromoter (forxylF)controlled byxylRandCRP-cAMP BBa_I741019 SEQIDNO:338 ...gcaaaataaaatggaatgatgaaactgggt Rightfacingpromoter (forxylA)controlled byxylRandCRP-cAMP BBa_I741020 SEQIDNO:339 ...gttacgtttatcgcggtgattgttacttat promotertoxylF withoutCRPand severalbinding sitesforxylR BBa_I741021 SEQIDNO:340 ...atttcacactgctattgagataattcacaa promotertoxylA withoutCRPand severalbinding sitesforxylR BBa_I746104 SEQIDNO:341 ...agattgtactaaatcgtataatgacagtga P2promoterin agroperonfrom S.aureus BBa_I746360 SEQIDNO:342 ...gacatctccggcgcaactgaaaataccact PFpromoter fromP2phage BBa_I746361 SEQIDNO:343 ...gaggatgcgcatcgtcgggaaactgatgcc POpromoter fromP2phage BBa_I746362 SEQIDNO:344 ...catccgggactgatggcggaggatgcgcat PPpromoter fromP2phage BBa_I746363 SEQIDNO:345 ...aacttttatatattgtgcaatctcacatgc PVpromoter fromP2phage BBa_I746364 SEQIDNO:346 ...tgttgtccggtgtacgtcacaattttctta Psidpromoter fromP4phage BBa_I746365 SEQIDNO:347 ...aatggctgtgtgttttttgttcatctccac PLLpromoter fromP4phage BBa_I751501 SEQIDNO:348 ...gtgttgatgcttttatcaccgccagtggta plux-cIhybrid promoter BBa_I751502 SEQIDNO:349 ...agtgtgtggaattgtgagcggataacaatt plux-lachybrid promoter BBa_I760005 SEQIDNO:350 atgacaaaattgtcat Cu-sensitive promoter BBa_I761011 SEQIDNO:351 ...acatcttaaaagttttagtatcatattcgt CinR,CinLand glucosecon- trolledpromoter BBa_I765001 SEQIDNO:352 ...ctgaaagcgcataccgctatggagggggtt UVpromoter BBa_I765007 SEQIDNO:353 ...ctgaaagcgcataccgctatggagggggtt FeandUV promoters BBa_J01005 SEQIDNO:354 ...aacgaatataacaggtgggagatgagagga pspoIIEpromoter (spo0AJ01004, positive) BBa_J03007 SEQIDNO:355 ...aatatttcctcattttccacagtgaagtga Maltosespecific promoter BBa_J06403 SEQIDNO:356 ...tacgcaagaaaatggtttgttatagtcgaa RhIRpromoter repressible byCI BBa_J07007 SEQIDNO:357 ...atttaattgttttgatcaattatttttctg ctxpromoter BBa_J13210 SEQIDNO:358 ...attattctgcatttttggggagaatggact pOmpRdependent POPSproducer BBa_J15502 SEQIDNO:359 ...ccttgctggaaggtttaacctttatcacag copApromoter BBa_J16101 SEQIDNO:360 atgatgtgtccatggatta BanAp-Banana- inducedPromoter BBa_J16105 SEQIDNO:361 atgatagacgatgtgcggacaacgtg HelPp-Help Dependantpromoter BBa_J45503 SEQIDNO:362 ...cattagccgccaccatggggttaagtagca hybBColdShock Promoter BBa_J58100 SEQIDNO:363 ...atttataaatagtggtgatagatttaacgt AND-typepromoter synergistically activatedby cIandCRP BBa_J61051 SEQIDNO:364 ...ataaagccatcacgagtaccatagaggatc [Psal1] BBa_J61054 SEQIDNO:365 ...tttgtcttttcttgcttaataatgttgtca [HIP-1] Promoter BBa_J61055 SEQIDNO:366 ...tttgtcttttcttgcttaataatgttgtca [HIP-1fnr] Promoter BBa_J64000 SEQIDNO:367 ...atcctcctttagtcttccccctcatgtgtg rhlIpromoter BBa_J64010 SEQIDNO:368 ...taaaattatgaaatttgcataaattcttca lasIpromoter BBa_J64712 SEQIDNO:369 ...gaaatctggcagtttttggtacacgaaagc LasR/LasIIn- ducible&RHLR/ RHLIrepressible Promoter BBa_J64800 SEQIDNO:370 ...tgccagttctggcaggtctaaaaagtgttc RHLR/RHLIIn- ducible&LasR/ LasIrepressible Promoter BBa_J64804 SEQIDNO:371 ...cacagaacttgcatttatataaagggaaag Thepromoterregion (inclusiveof regulatorbinding sites)oftheB. subtilisRocDEF operon BBa_K091107 SEQIDNO:372 ...acaccgtgcgtgttgatatagtcgaataaa pLux/cIHybrid Promoter BBa_K091117 SEQIDNO:373 ...aaaattatgaaatttgtataaattcttcag pLaspromoter BBa_K091143 SEQIDNO:374 ...ggttctttttggtacctctggcggtgataa pLas/cIHybrid Promoter BBa_K091146 SEQIDNO:375 ...tgtaggatcgtacaggtataaattcttcag pLas/LuxHybrid Promoter BBa_K091156 SEQIDNO:376 ...caagaaaatggtttgttatagtcgaataaa pLux BBa_K091157 SEQIDNO:377 ...ctatctcatttgctagtatagtcgaataaa pLux/LasHybrid Promoter BBa_K100000 SEQIDNO:378 ...gttacgtttatcgcggtgattgttacttat NaturalXylose RegulatedBi- DirectionalOperator BBa_K100001 SEQIDNO:379 ...gttacgtttatcgcggtgattgttacttat EditedXylose RegulatedBi- Directional Operator1 BBa_K100002 SEQIDNO:380 ...gttacgtttatcgcggtgattgttacttat EditedXylose RegulatedBi- Directional Operator2 BBa_K112118 SEQIDNO:381 ...ataaatgcttgactctgtagcgggaaggcg rrnBP1promoter BBa_K112320 SEQIDNO:382 ...aaaactggtagtaggactggagattggtac {< ftsAZpromoter>} inBBbformat BBa_K112322 SEQIDNO:383 ...gggacacaaacatcaagaggatatgagatt {Pdps} inBBb format BBa_K112402 SEQIDNO:384 ...gtcaaaatgaccgaaacgggtggtaacttc promoterfor FabAgene- MembraneDamage andUltrasound Sensitive BBaK112405 SEQIDNO:385 ...agtaatcttatcgccagtttggtctggtca PromoterforCadA andCadBgenes BBa_K112406 SEQIDNO:386 ...agtaatcttatcgccagtttggtctggtca cadCpromoter BBa_K112701 SEQIDNO:387 ...aattctgaacaacatccgtactcttcgtgc hnspromoter BBa_K112900 SEQIDNO:388 ...tcgataagattaccgatcttacctgaagct Pbad BBa_K116001 SEQIDNO:389 ...cgatctattcacctgaaagagaaataaaaa nhaApromoter,which canberegulatedby pHandnhaRprotein. BBa_K116401 SEQIDNO:390 ...atcgcaacctatttattacaacactagtgc externalphosphate sensingpromoter BBa_K116500 SEQIDNO:391 ...aaacgttagtttgaatggaaagatgcctgc OmpFpromoterthat isactivatedor repressedbyOmpR accordingto osmolarity. BBa_K116603 SEQIDNO:392 ...tttgcacgaaccatatgtaagtatttcctt pREpromoterfrom phage BBa_K117002 SEQIDNO:393 ...taacacttatttaattaaaaagaggagaaa LsrApromoter (indirectlyacti- vatedbyAI-2) BBa_K118011 SEQIDNO:394 ...tagaaacaaaatgtaacatctctatggaca PcstA(glucose- repressible promoter) BBa_K121011 SEQIDNO:395 ...acaggaaacagctatgaccatgattacgcc promoter(lacI regulated) BBa_K135000 SEQIDNO:396 ...agcgacgtctgatgacgtaatttctgcctc pCpxR(CpxR responsive promoter) BBa_K136010 SEQIDNO:397 ...gttcactctataccgctgaaggtgtaatgg fliApromoter BBa_K145150 SEQIDNO:398 ...tagtttataatttaagtgttctttaatttc Hybridpromoter: HSL-LuxRactivated, P22C2repressed BBa_K180000 SEQIDNO:399 ...cgagcacttcaccaacaaggaccatagcat Hybridpromoter (trp&lacregu- lated--tacpR) BBa_K180002 SEQIDNO:400 ...caccttcgggtgggcctttctgcgtttata tacpRtesting plasmid(GFP) BBa_K180003 SEQIDNO:401 ...catggcatggatgaactatacaaataataa PTACtesting plasmid(GFP)- basic BBa_K180004 SEQIDNO:402 ...caccttcgggtgggcctttctgcgtttata GameofLife- Primaryplasmid BBa_K180005 SEQIDNO:403 ...caccttcgggtgggcctttctgcgtttata GoL-Primary plasmid(part1)/ RPS-Paperprimary plasmid(part1) [LuxRgenerator] BBa_K180006 SEQIDNO:404 ...caccttcgggtgggcctttctgcgtttata GameofLife- Primaryplasmid (part2)[luxpR, GFPandLacI generator] BBa_K180007 SEQIDNO:405 ...caccttcgggtgggcctttctgcgtttata GameofLife- Secondaryplasmid [tacpR,LuxI generator] BBa_K180010 SEQIDNO:406 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Rockprimaryplasmid BBa_K180011 SEQIDNO:407 ...caccttcgggtgggcctttctgcgtttata Rock-Primary plasmid(part1) [RhlRgenerator] BBa_K180012 SEQIDNO:408 ...caccttcgggtgggcctttctgcgtttata Rock-Primary plasmid(part2) [tacpR,mCherry andLasIgenerator] BBa_K180013 SEQIDNO:409 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Rocksecondaryplasmid [rhlpR,LacIgenerator] BBa_K180014 SEQIDNO:410 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Paperprimaryplasmid BBa_K180015 SEQIDNO:411 ...caccttcgggtgggcctttctgcgtttata Paper-Primary plasmid(part2) [tacpR,GFPand RhlIgenerator] BBa_K180016 SEQIDNO:412 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Papersecondaryplasmid [luxpR,LacIgenerator] BBa_K180017 SEQIDNO:413 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Scissorsprimaryplasmid BBa_K180018 SEQIDNO:414 ...caccttcgggtgggcctttctgcgtttata Scissors-Primary plasmid(part1) [LasRgenerator] BBa_K180019 SEQIDNO:415 ...caccttcgggtgggcctttctgcgtttata Scissors-Primary plasmid(part2) [tacpR,mBananaand LuxIgenerator] BBa_K180020 SEQIDNO:416 ...caccttcgggtgggcctttctgcgtttata Rock-paper-scissors- Scissorssecondary plasmid[laspR, LacIgenerator] BBa_K206000 SEQIDNO:417 ...tgtttctccataccgtttttttgggctagc pBADstrong BBa_K206001 SEQIDNO:418 ...tgtttctccataccgtttttttgggctagc pBADweak BBa_K259005 SEQIDNO:419 ...ttttatcgcaactctctactgtttctccat AraCRheostat Promoter BBa_K259007 SEQIDNO:420 ...gtttctccattactagagaaagaggggaca AraCPromoter fusedwithRBS BBa_K266000 SEQIDNO:421 ...caccttcgggtgggcctttctgcgtttata PAI+ LasR-> LuxI (AI) BBa_K266005 SEQIDNO:422 ...aataactctgatagtgctagtgtagatctc PAI+ LasR-> LasI& AI+ LuxR--ILasI BBa_K266006 SEQIDNO:423 ...caccttcgggtgggcctttctgcgtttata PAI+ LasR-> LasI+ GFP&AI+ LuxR--ILasI+ GFP BBa_K266007 SEQIDNO:424 ...caccttcgggtgggcctttctgcgtttata ComplexQS-> LuxI &LasIcircuit

(111) TABLE-US-00029 TABLE28 ExamplesofPositivelyregulatedE.coliSpromoters Name Description PromoterSequence BBa_K112322 SEQIDNO:425{Pdps} inBBbformat ...gggacacaaacatcaagaggatatgagatt

(112) TABLE-US-00030 TABLE29 ExamplesofPositivelyregulatedE.coli32promoters Name Description PromoterSequence BBa_K112400 SEQIDNO:426PromoterforgrpEgene- ... HeatShockandUltrasoundSensitive ataataagcgaagttagcgagatgaatgcg

(113) TABLE-US-00031 TABLE30 ExamplesofPositivelyregulatedE.coli54promoters Name Description PromoterSequence BBa_J64979 SEQIDNO:427glnAp2 ...agttggcacagatttcgctttatctttttt

(114) TABLE-US-00032 TABLE31 ExamplesofPositivelyregulatedB.subtilisApromoters Name Description PromoterSequence BBa_R0062 SEQIDNO:428Promoter(luxR&HSL ... regulated--luxpR) caagaaaatggtttgttatagtcgaataaa BBa_R0065 SEQIDNO:429Promoter(lambdacIand ... luxRregulated--hybrid) gtgttgactattttacctctggcggtgata BBa_R0071 SEQIDNO:430Promoter(RhlR&C4-HSL ... regulated) gttagctttcgaattggctaaaaagtgttc BBa_R0078 SEQIDNO:431Promoter(cinRandHSL ... regulated) ccattctgctttccacgaacttgaaaacgc BBa_R0079 SEQIDNO:432Promoter(LasR&PAI ... regulated) ggccgcgggttctttttggtacacgaaagc BBa_R0080 SEQIDNO:433Promoter(AraCregulated) ...ttttatcgcaactctctactgtttctccat BBa_R0082 SEQIDNO:434Promoter(OmpR,positive) ... attattctgcatttttggggagaatggact BBa_R0083 SEQIDNO:435Promoter(OmpR,positive) ... attattctgcatttttggggagaatggact BBa_R0084 SEQIDNO:436Promoter(OmpR,positive) ... aacgttagtttgaatggaaagatgcctgca BBa_R1062 SEQIDNO:437Promoter,Standard(luxR ... andHSLregulated--luxpR) aagaaaatggtttgttgatactcgaataaa

(115) TABLE-US-00033 TABLE32 ExamplesofMiscellaneousProkaryoticInducedPromoters Name Description PromoterSequence BBa_J64001 SEQIDNO:438psicAfromSalmonella ... aacgcagtcgttaagttctacaaagtcggt BBa_J64750 SEQIDNO:439SPI-1TTSSsecretion- ... linkedpromoterfromSalmonella gtcggtgacagataacaggagtaagtaatg BBa_K112149 SEQIDNO:440PmgtCBMagnesium ... promoterfromSalmonella tattggctgactataataagcgcaaattca BBa_K116201 SEQIDNO:441ureDpromoterfromP mirabilis BBa_K125100 SEQIDNO:442nirpromoter ... fromSynechocystissp.PCC6803 cgaaacgggaaccctatattgatctctact BBa_K131017 SEQIDNO:443p_qrr4fromVibrioharveyi ... aagttggcacgcatcgtgctttatacagat

(116) TABLE-US-00034 TABLE33 ExamplesofYeastPositive(Activatible)Promoters Name Description PromoterSequence BBa_J63006 SEQIDNO:444yeastGAL1promoter ... gaggaaactagacccgccgccaccatggag BBa_K284002 SEQIDNO:445JEN1Promoterfrom ... Kluyveromyceslactis gagtaaccaaaaccaaaacagatttcaacc BBa_K106699 SEQIDNO:446Gal1Promoter ...aaagtaagaatttttgaaaattcaatataa BBaK165041 SEQIDNO:447Zif268-HIVbinding ...atacggtcaacgaactataattaactaaac sites+ TEFconstitutiveyeastpromoter BBa_K165034 SEQIDNO:448Zif268-HIVbs+ LexA ...cacaaatacacacactaaattaataactag bs+ mCYCpromoter BBa_K165031 SEQIDNO:449mCYCpromoterplus ...cacaaatacacacactaaattaataactag LexAbindingsites BBa_K165030 SEQIDNO:450mCYCpromoterplus ...cacaaatacacacactaaattaataactag Zif268-HIVbindingsites BBa_K165001 SEQIDNO:451pGAL1+ w/XhoIsites ...atactttaacgtcaaggagaaaaaactata BBa_K110016 SEQIDNO:452A-CellPromoterSTE2 ... (backwards) accgttaagaaccatatccaagaatcaaaa BBa_K110015 SEQIDNO:453A-CellPromoterMFA1 ...cttcatatataaaccgccagaaatgaatta (RtL) BBa_K110014 SEQIDNO:454A-CellPromoterMFA2 ...atcttcatacaacaataactaccaacctta (backwards) BBa_K110006 SEQIDNO:455AlphaCellPromoter ...tttcatacacaatataaacgattaaaagaa MF(ALPHA)1 BBa_K110005 SEQIDNO:456AlphaCellPromoter ...aaattccagtaaattcacatattggagaaa MF(ALPHA)2 BBa_K110004 SEQIDNO:457Alpha-CellPromoter ... Ste3 gggagccagaacgcttctggtggtgtaaat BBa_J24813 SEQIDNO:458URA3PromoterfromS. ...gcacagacttagattggtatatatacgcat cerevisiae BBa_K284003 SEQIDNO:459PartialDLDPromoter ... fromKluyveromyceslactis aagtgcaagaaagaccagaaacgcaactca

(117) TABLE-US-00035 TABLE34 ExamplesofEukaryoticPositive(Activatible)Promoters Name Description PromoterSequence BBa_I10498 SEQIDNO:460Oct-4promoter ...taaaaaaaaaaaaaaaaaaaaaaaaaaaaa BBa_J05215 SEQIDNO:461RegulatorforR1- ... CREBH ggggcgagggccccgcctccggaggcgggg BBa_J05216 SEQIDNO:462RegulatorforR3- ... ATF6 gaggggacggctccggccccggggccggag BBa_J05217 SEQIDNO:463RegulatorforR2- ... YAP7 ggggcgagggctccggccccggggccggag BBa_J05218 SEQIDNO:464RegulatorforR4- ... cMaf gaggggacggccccgcctccggaggcgggg

(118) TABLE-US-00036 TABLE35 ExamplesofNegativelyregulated(repressible)E.coli70promoters Name Description PromoterSequence BBa_I1051 SEQIDNO:465Luxcassetterightpromoter ... tgttatagtcgaatacctctggcggtgata BBa_I12001 SEQIDNO:466Promoter(PRM+) ... gatttaacgtatcagcacaaaaaagaaac c BBa_I12006 SEQIDNO:467ModifiedlamdbaPrm ... promoter(repressedby434cI) attacaaactttcttgtatagatttaacgt BBa_I12036 SEQIDNO:468ModifiedlamdbaPrm ...tttcttgtatagatttacaatgtatcttgt promoter(cooperativerepressionby434cI) BBa_I12040 SEQIDNO:469ModifiedlambdaP(RM) ... promoter:-10regionfromP(L)and tttcttgtagatacttacaatgtatcttgt cooperativelyrepressedby434cI BBa_I12212 SEQIDNO:470TetR-TetR-4Cheterodimer ... promoter(negative) actctgtcaatgatagagtggattcaaaaa BBa_I14015 SEQIDNO:471P(Las)TetO ... ttttggtacactccctatcagtgatagaga BBa_I14016 SEQIDNO:472P(Las)CIO ... ctttttggtacactacctctggcggtgata BBa_I14032 SEQIDNO:473promoterP(Lac)IQ ... aaacctttcgcggtatggcatgatagcgc c BBa_I714889 SEQIDNO:474OR21ofPRandPRM ... tattttacctctggcggtgataatggttgc BBa_I714924 SEQIDNO:475RecA_DlexO-DLacO1 ... actctcggcatggacgagctgtacaagta a BBa_I715003 SEQIDNO:476hybridpLacwithUV5 ... mutation ttgtgagcggataacaatatgttgagcaca BBa_I718018 SEQIDNO:477dapAppromoter ... cattgagacacttgtttgcacagaggatgg BBa_I731004 SEQIDNO:478FecApromoter ... ttctcgttcgactcatagctgaacacaaca BBa_I732200 SEQIDNO:479NOTGatePromoterFamily ... Member(D001O1wt1) gaattgtgagcggataacaattggatccg g BBa_I732201 SEQIDNO:480NOTGatePromoterFamily ... Member(D001O11) ggaattgtgagcgctcacaattggatccg g BBa_I732202 SEQIDNO:481NOTGatePromoterFamily ... Member(D001O22) ggaattgtaagcgcttacaattggatccgg BBa_I732203 SEQIDNO:482NOTGatePromoterFamily ... Member(D001O33) ggaattgtaaacgtttacaattggatccgg BBa_I732204 SEQIDNO:483NOTGatePromoterFamily ... Member(D001O44) ggaattgtgaacgttcacaattggatccgg BBa_I732205 SEQIDNO:484NOTGatePromoterFamily ... Member(D001O55) ggaattttgagcgctcaaaattggatccgg BBa_I732206 SEQIDNO:485NOTGatePromoterFamily ... Member(D001O66) ggaattatgagcgctcataattggatccgg BBa_I732207 SEQIDNO:486NOTGatePromoterFamily ... Member(D001O77) gggacgactgtatacagtcgtcggatccg g BBa_I732270 SEQIDNO:487PromoterFamilyMember ... withHybridOperator(D001O12) ggaattgtgagcgcttacaattggatccg g BBa_I732271 SEQIDNO:488PromoterFamilyMember ... withHybridOperator(D001O16) ggaattgtgagcgctcataattggatccg g BBa_I732272 SEQIDNO:489PromoterFamilyMember ... withHybridOperator(D001O17) ggaattgtgagctacagtcgtcggatccg g BBa_I732273 SEQIDNO:490PromoterFamilyMember ... withHybridOperator(D001O21) ggaattgtaagcgctcacaattggatccg g BBa_I732274 SEQIDNO:491PromoterFamilyMember ... withHybridOperator(D001O24) ggaattgtaagcgttcacaattggatccgg BBa_I732275 SEQIDNO:492PromoterFamilyMember ... withHybridOperator(D001O26) ggaattgtaagcgctcataattggatccgg BBa_I732276 SEQIDNO:493PromoterFamilyMember ... withHybridOperator(D001O27) ggaattgtaagctacagtcgtcggatccg g BBa_I732277 SEQIDNO:494PromoterFamilyMember ... withHybridOperator(D001O46) ggaattgtgaacgctcataattggatccgg BBa_I732278 SEQIDNO:495PromoterFamilyMember ... withHybridOperator(D001O47) ggaattgtgaactacagtcgtcggatccg g BBa_I732279 SEQIDNO:496PromoterFamilyMember ... withHybridOperator(D001O61) ggaattatgagcgctcacaattggatccg g BBa_I732301 SEQIDNO:497NANDCandidate ... (U073O26D001O16) ggaattgtgagcgctcataattggatccg g BBa_I732302 SEQIDNO:498NANDCandidate ... (U073O27D001O17) ggaattgtgagctacagtcgtcggatccg g BBa_I732303 SEQIDNO:499NANDCandidate ... (U073O22D001O46) ggaattgtgaacgctcataattggatccgg BBa_I732304 SEQIDNO:500NANDCandidate ... (U073O22D001O47) ggaattgtgaactacagtcgtcggatccg g BBa_I732305 SEQIDNO:501NANDCandidate ... (U073O22D059O46) taaattgtgaacgctcataattggatccgg BBa_I732306 SEQIDNO:502NANDCandidate ... (U073O11D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732351 SEQIDNO:503NORCandidate ... (U037O11D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732352 SEQIDNO:504NORCandidate ... (U035O44D001O22) ggaattgtaagcgcttacaattggatccgg BBa_I732400 SEQIDNO:505PromoterFamilyMember ... (U097NUL+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732401 SEQIDNO:506PromoterFamilyMember ... (U097O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732402 SEQIDNO:507PromoterFamilyMember ... (U085O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732403 SEQIDNO:508PromoterFamilyMember ... (U073O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732404 SEQIDNO:509PromoterFamilyMember ... (U061O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732405 SEQIDNO:510PromoterFamilyMember ... (U049O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732406 SEQIDNO:511PromoterFamilyMember ... (U037O11+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732407 SEQIDNO:512PromoterFamilyMember ... (U097NUL+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732408 SEQIDNO:513PromoterFamilyMember ... (U097NUL+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732409 SEQIDNO:514PromoterFamilyMember ... (U097NUL+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732410 SEQIDNO:515PromoterFamilyMember ... (U097NUL+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732411 SEQIDNO:516PromoterFamilyMember ... (U097NUL+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732412 SEQIDNO:517PromoterFamilyMember ... (U097NUL+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732413 SEQIDNO:518PromoterFamilyMember ... (U097O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732414 SEQIDNO:519PromoterFamilyMember ... (U097O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732415 SEQIDNO:520PromoterFamilyMember ... (U097O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732416 SEQIDNO:521PromoterFamilyMember ... (U097O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732417 SEQIDNO:522PromoterFamilyMember ... (U097O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732418 SEQIDNO:523PromoterFamilyMember ... (U097O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732419 SEQIDNO:524PromoterFamilyMember ... (U085O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732420 SEQIDNO:525PromoterFamilyMember ... (U085O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732421 SEQIDNO:526PromoterFamilyMember ... (U085O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732422 SEQIDNO:527PromoterFamilyMember ... (U085O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732423 SEQIDNO:528PromoterFamilyMember ... (U085O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732424 SEQIDNO:529PromoterFamilyMember ... (U085O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732425 SEQIDNO:530PromoterFamilyMember ... (U073O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732426 SEQIDNO:531PromoterFamilyMember ... (U073O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732427 SEQIDNO:532PromoterFamilyMember ... (U073O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732428 SEQIDNO:533PromoterFamilyMember ... (U073O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732429 SEQIDNO:534PromoterFamilyMember ... (U073O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732430 SEQIDNO:535PromoterFamilyMember ... (U073O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732431 SEQIDNO:536PromoterFamilyMember ... (U061O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732432 SEQIDNO:537PromoterFamilyMember ... (U061O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732433 SEQIDNO:538PromoterFamilyMember ... (U061O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732434 SEQIDNO:539PromoterFamilyMember ... (U061O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732435 SEQIDNO:540PromoterFamilyMember ... (U061O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732436 SEQIDNO:541PromoterFamilyMember ... (U061O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732437 SEQIDNO:542PromoterFamilyMember ... (U049O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732438 SEQIDNO:543PromoterFamilyMember ... (U049O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732439 SEQIDNO:544PromoterFamilyMember ... (U049O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732440 SEQIDNO:545PromoterFamilyMember ... (U049O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732441 SEQIDNO:546PromoterFamilyMember ... (U049O11+ 30D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732442 SEQIDNO:547PromoterFamilyMember ... (U049O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732443 SEQIDNO:548PromoterFamilyMember ... (U037O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732444 SEQIDNO:549PromoterFamilyMember ... (U037O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732445 SEQIDNO:550PromoterFamilyMember ... (U037O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732446 SEQIDNO:551PromoterFamilyMember ... (U037O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732447 SEQIDNO:552PromoterFamilyMember ... (U037O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732448 SEQIDNO:553PromoterFamilyMember ... (U037O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732450 SEQIDNO:554PromoterFamilyMember ... (U073O26+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732451 SEQIDNO:555PromoterFamilyMember ... (U073O27+ D062NUL) gccaaattaaacaggattaacaggatccg g BBa_I732452 SEQIDNO:556PromoterFamilyMember ... (U073O26+ D062O61) caaattatgagcgctcacaattggatccg g BBa_I739101 SEQIDNO:557DoublePromoter ... (constitutive/TetR,negative) tgatagagattccctatcagtgatagagat BBa_I739102 SEQIDNO:558DoublePromoter(cI, ... negative/TetR,negative) tgatagagattccctatcagtgatagagat BBa_I739103 SEQIDNO:559DoublePromoter(lacI ...gttctttaattatttaagtgttctttaatt negative/P22cII,negative) BBa_I739104 SEQIDNO:560DoublePromoter(LuxR/HSL, ...gttctttaattatttaagtgttctttaatt positive/P22cII,negative) BBa_I739105 SEQIDNO:561DoublePromoter(LuxR/HSL, ... positive/cI,negative) cgtgcgtgttgataacaccgtgcgtgttga BBa_I739106 SEQIDNO:562DoublePromoter(TetR, ...gtgttctttaatatttaagtgttctttaat negative/P22cII,negative) BBa_I739107 SEQIDNO:563DoublePromoter(cI, ... negative/LacI,negative) ggaattgtgagcggataacaatttcacac a BBa_I746665 SEQIDNO:564Pspac-hypromoter ... tgtgtgtaattgtgagcggataacaattaa BBa_I751500 SEQIDNO:565pcI(forpositivecontrolof ... pcI-luxhybridpromoter) ttttacctctggcggtgataatggttgcag BBa_I751501 SEQIDNO:566plux-cIhybridpromoter ... gtgttgatgcttttatcaccgccagtggta BBa_I751502 SEQIDNO:567plux-lachybridpromoter ... agtgtgtggaattgtgagcggataacaatt BBa_I756014 SEQIDNO:568LexAoperator- ... MajorLatePromoter agggggtgggggcgcgttggcgcgcca cac BBa_I761011 SEQIDNO:569CinR,CinLandglucose ... controlledpromoter acatcttaaaagttttagtatcatattcgt BBa_J05209 SEQIDNO:570ModifiedPrPromoter ... tattttacctctggcggtgataatggttgc BBa_J05210 SEQIDNO:571ModifiedPrm+ Promoter ... atttataaatagtggtgatagatttaacgt BBa_J07019 SEQIDNO:572FecAPromoter(withFur ... box) acccttctcgttcgactcatagctgaacac BBa_J15301 SEQIDNO:573Parspromoterfrom ... Escherichiacolichromosomalarsoperon. tgacttatccgcttcgaagagagacactac BBa_J22052 SEQIDNO:574Pcya ... aggtgttaaattgatcacgttttagaccat BBa_J22106 SEQIDNO:575recA(SOS)Promoter ... caatttggtaaaggctccatcatgtaataa BBa_J22126 SEQIDNO:576RecA(SOS)promoter ... gagaaacaatttggtaaaggctccatcat g BBa_J31013 SEQIDNO:577pLacBackwards[cf. ... BBa_R0010] aacgcgcggggagaggcggtttgcgtat tg BBa_J34800 SEQIDNO:578Promotertetracycline ... inducible cagtgatagagatactgagcacatcagca c BBa_J34806 SEQIDNO:579promoterlac ... induced ttatgcttccggctcgtataatgtttcaaa BBa_J34809 SEQIDNO:580promoterlacinduced ... ggctcgtatgttgtgtcgaccgagctgcg c BBa_J54016 SEQIDNO:581promoter_lacq ... aaacctttcgcggtatggcatgatagcgc c BBa_J54120 SEQIDNO:582EmrR_regulatedpromoter ... atttgtcactgtcgttactatatcggctgc BBa_J54130 SEQIDNO:583BetI_regulatedpromoter ... gtccaatcaataaccgctttaatagataaa BBa_J56012 SEQIDNO:584Invertiblesequenceofdna ... includesPtrcpromoter actttattatcaataagttaaatcggtacc BBa_J64065 SEQIDNO:585cIrepressedpromoter ... gtgttgactattttacctctggcggtgata BBa_J64067 SEQIDNO:586LuxR+ 3OC6HSL ... independentR0065 gtgttgactattttacctctggcggtgata BBa_J64068 SEQIDNO:587increasedstrengthR0051 ... atacctctggcggtgatatataatggttgc BBa_J64069 SEQIDNO:588R0065withluxboxdeleted ... gtgttgactattttacctctggcggtgata BBa_J64712 SEQIDNO:589LasR/LasIInducible& ... RHLR/RHLIrepressiblePromoter gaaatctggcagtttttggtacacgaaagc BBa_J64800 SEQIDNO:590RHLR/RHLIInducible& ... LasR/LasIrepressiblePromoter tgccagttctggcaggtctaaaaagtgttc BBa_J64981 SEQIDNO:591OmpR-Pstrongbinding, ... regulatoryregionforTeamChallenge03-2007 agcgctcacaatttaatacgactcactata BBa_J64987 SEQIDNO:592LacIConsensusBindingSite ... insigma70bindingregion taataattgtgagcgctcacaattttgaca BBa_J72005 SEQIDNO:593{Ptet} promoterinBBb ... atccctatcagtgatagagatactgagcac BBa_K086017 SEQIDNO:594unmodifiedLutz-Bujard ... LacOpromoter ttgtgagcggataacaagatactgagcac a BBa_K091100 SEQIDNO:595pLac_luxhybridpromoter ... ggaattgtgagcggataacaatttcacac a BBa_K091101 SEQIDNO:596pTet_Lachybridpromoter ... ggaattgtgagcggataacaatttcacac a BBa_K091104 SEQIDNO:597pLac/MntHybridPromoter ... ggaattgtgagcggataacaatttcacac a BBa_K091105 SEQIDNO:598pTet/MntHybridPromoter ... agaactgtaatccctatcagtgatagagat BBa_K091106 SEQIDNO:599LsrA/cIhybridpromoter ... tgttgatttatctaacaccgtgcgtgttga BBa_K091107 SEQIDNO:600pLux/cIHybridPromoter ... acaccgtgcgtgttgatatagtcgaataaa BBa_K091110 SEQIDNO:601LacIPromoter ... cctttcgcggtatggcatgatagcgcccg g BBa_K091111 SEQIDNO:602LacIQpromoter ... cctttcgcggtatggcatgatagcgcccg g BBa_K091112 SEQIDNO:603pLacIQ1promoter ... cctttcgcggtatggcatgatagcgcccg g BBa_K091143 SEQIDNO:604pLas/cIHybridPromoter ... ggttctttttggtacctctggcggtgataa BBa_K091146 SEQIDNO:605pLas/LuxHybridPromoter ... tgtaggatcgtacaggtataaattcttcag BBa_K091157 SEQIDNO:606pLux/LasHybridPromoter ... ctatctcatttgctagtatagtcgaataaa BBa_K093000 SEQIDNO:607pRecAwithLexAbinding ... site gtatatatatacagtataattgcttcaaca BBa_K093008 SEQIDNO:608reverseBBa_R0011 ... cacaatgtcaattgttatccgctcacaatt BBa_K094120 SEQIDNO:609pLacI/ara-1 ... aattgtgagcggataacaatttcacacaga BBa_K094140 SEQIDNO:610pLaclq ... ccggaagagagtcaattcagggtggtga at BBa_K101000 SEQIDNO:611Dual-RepressedPromoterfor ... p22mntandTetR acggtgacctagatctccgatactgagca c BBa_K101001 SEQIDNO:612Dual-RepressedPromoterfor ... LacIandLambdacI tggaattgtgagcggataaaatttcacaca BBa_K101002 SEQIDNO:613Dual-RepressedPromoterfor ... p22cIIandTetR tagtagataatttaagtgttctttaatttc BBa_K101017 SEQIDNO:614MioCPromoter(DNAa- ... RepressedPromoter) ccaacgcgttcacagcgtacaattactagt BBa_K109200 SEQIDNO:615AraCandTetRpromoter ... (hybrid) aacaaaaaaacggatcctctagttgcggc c BBa_K112118 SEQIDNO:616rrnBP1promoter ... ataaatgcttgactctgtagcgggaaggc g BBa_K112318 SEQIDNO:617{<bolApromoter>} inBBb ... format atttcatgatgatacgtgagcggatagaag BBa_K112401 SEQIDNO:618PromoterforrecAgene-SOS ... andUltrasoundSensitive caaacagaaagcgttggcggcagcactg gg BBa_K112402 SEQIDNO:619promoterforFabAgene- ... MembraneDamageandUltrasoundSensitive gtcaaaatgaccgaaacgggtggtaactt c BBa_K112405 SEQIDNO:620PromoterforCadAandCadB ... genes agtaatcttatcgccagtttggtctggtca BBa_K112406 SEQIDNO:621cadCpromoter ... agtaatcttatcgccagtttggtctggtca BBa_K112701 SEQIDNO:622hnspromoter ... aattctgaacaacatccgtactcttcgtgc BBa_K112708 SEQIDNO:623PfhuA ... tttacgttatcattcactttacatcagagt BBa_K113009 SEQIDNO:624pBad/araC ... gtttctccatacccgtttttttgggctagc BBa_K116001 SEQIDNO:625nhaApromoterthatcanbe ... regulatedbypHandnhaRprotein. cgatctattcacctgaaagagaaataaaa a BBa_K116500 SEQIDNO:626OmpFpromoterthatis ... activatedorrepressedbyOmpRaccordingto aaacgttagtttgaatggaaagatgcctgc osmolarity. BBa_K119002 SEQIDNO:627RcnRoperator(represses ... RcnA) attgccgaattaatactaagaattattatc BBa_K121011 SEQIDNO:628promoter(lacIregulated) ... acaggaaacagctatgaccatgattacgc c BBa_K121014 SEQIDNO:629promoter(lambdacI ... regulated) actggcggttataatgagcacatcagcag g BBa_K137046 SEQIDNO:630150bpinvertedtetRpromoter ... caccgacaaacaacagataaaacgaaag gc BBa_K137047 SEQIDNO:631250bpinvertedtetRpromoter ... agtgttattaagctactaaagcgtagtttt BBa_K137048 SEQIDNO:632350bpinvertedtetRpromoter ... gaataagaaggctggctctgcaccttggt g BBa_K137049 SEQIDNO:633450bpinvertedtetRpromoter ... ttagcgacttgatgctcttgatcttccaat BBa_K137050 SEQIDNO:634650bpinvertedtetRpromoter ... acatctaaaacttttagcgttattacgtaa BBa_K137051 SEQIDNO:635850bpinvertedtetRpromoter ... ttccgacctcattaagcagctctaatgcgc BBa_K137124 SEQIDNO:636LacI-repressedpromoterA81 ... caatttttaaacctgtaggatcgtacaggt BBa_K137125 SEQIDNO:637LacI-repressedpromoterB4 ... caatttttaaaattaaaggcgttacccaac BBaK145150 SEQIDNO:638Hybridpromoter:HSL-LuxR ...tagtttataatttaagtgttctttaatttc activated,P22C2repressed BBa_K145152 SEQIDNO:639Hybridpromoter:P22c2, ... LacINORgate gaaaatgtgagcgagtaacaacctcaca ca BBa_K256028 SEQIDNO:640placI:CHE ... caccttcgggtgggcctttctgcgtttata BBa_K259005 SEQIDNO:641AraCRheostatPromoter ... ttttatcgcaactctctactgtttctccat BBa_K259007 SEQIDNO:642AraCPromoterfusedwith ... RBS gtttctccattactagagaaagaggggac a BBa_K266001 SEQIDNO:643InverterTetR-> LuxR ... caccttcgggtgggcctttctgcgtttata BBa_K266003 SEQIDNO:644POPS-> LacInverter-> ... LasR caccttcgggtgggcctttctgcgtttata BBa_K266004 SEQIDNO:645ConstLacInverter-> LasR ... caccttcgggtgggcctttctgcgtttata BBa_K266005 SEQIDNO:646PAI+ LasR-> LasI& ... AI+ LuxR--|LasI aataactctgatagtgctagtgtagatctc BBa_K266006 SEQIDNO:647PAI+ LasR->LasI+ GFP& ... AI+ LuxR--ILasI+ GFP caccttcgggtgggcctttctgcgtttata BBa_K266007 SEQIDNO:648ComplexQS-> LuxI&LasI circuit caccttcgggtgggcctttctgcgtttata BBa_K266008 SEQIDNO:649J23100+ Lacinverter ... ttgtgagcggataacaagatactgagcac a BBa_K266009 SEQIDNO:650J23100+ Lacinverter+ RBS ... actgagcacatactagagaaagaggaga aa BBa_K266011 SEQIDNO:651LacInverterandstrongRBS ... actgagcacatactagagaaagaggaga aa BBa_K292002 SEQIDNO:652pLac(LacIregulated)+ ... StrongRBS tcacacatactagagattaaagaggagaa a BBa_M31370 SEQIDNO:653tacIPromoter ... ggaattgtgagcggataacaatttcacac a BBa_R0010 SEQIDNO:654promoter(lacIregulated) ... ggaattgtgagcggataacaatttcacac a BBa_R0011 SEQIDNO:655Promoter(lacIregulated, ... lambdapLhybrid) ttgtgagcggataacaagatactgagcac a BBa_R0040 SEQIDNO:656TetRrepressiblepromoter ... atccctatcagtgatagagatactgagcac BBa_R0050 SEQIDNO:657Promoter(HK022cI ... regulated) ccgtcataatatgaaccataagttcaccac BBa_R0051 SEQIDNO:658promoter(lambdacI ... regulated) tattttacctctggcggtgataatggttgc BBa_R0052 SEQIDNO:659Promoter(434cIregulated) ... attgtatgaaaatacaagaaagtttgttga BBa_R0053 SEQIDNO:660Promoter(p22cIIregulated) ... tagtagataatttaagtgttctttaatttc BBa_R0061 SEQIDNO:661Promoter(HSL-mediated ... luxRrepressor) ttgacacctgtaggatcgtacaggtataat BBa_R0063 SEQIDNO:662Promoter(luxR&HSL ... regulated--luxpL) cacgcaaaacttgcgacaaacaataggta a BBa_R0065 SEQIDNO:663Promoter(lambdacIandluxR ... regulated--hybrid) gtgttgactattttacctctggcggtgata BBa_R0073 SEQIDNO:664Promoter(Mntregulated) ... tagatctcctatagtgagtcgtattaattt BBa_R0074 SEQIDNO:665Promoter(PenIregulated) ... tactttcaaagactacatttgtaagatttg BBa_R0075 SEQIDNO:666Promoter(TP901cI ... regulated) cataaagttcatgaaacgtgaactgaaatt BBa_R1050 SEQIDNO:667Promoter,Standard(HK022 ... cIregulated) ccgtgatactatgaaccataagttcaccac BBa_R1051 SEQIDNO:668Promoter,Standard(lambda ... cIregulated) aattttacctctggcggtgatactggttgc BBa_R1052 SEQIDNO:669Promoter,Standard(434cI ... regulated) attgtatgatactacaagaaagtttgttga BBa_R1053 SEQIDNO:670Promoter,Standard(p22cII ... regulated) tagtagatactttaagtgttctttaatttc BBa_R2000 SEQIDNO:671Promoter,Zif23regulated, ... test:between tggtcccacgcgcgtgggatactacgtca g BBa_R2001 SEQIDNO:672Promoter,Zif23regulated, ... test:after attacggtgagatactcccacgcgcgtgg g BBa_R2002 SEQIDNO:673Promoter,Zif23regulated, ... test:betweenandafter acgcgcgtgggatactcccacgcgcgtg gg BBa_R2108 SEQIDNO:674Promoterwithoperatorsite ... forC2003 gattagattcataaatttgagagaggagtt BBa_R2109 SEQIDNO:675Promoterwithoperatorsite forC2003 acttagattcataaatttgagagaggagtt BBa_R2110 SEQIDNO:676Promoterwithoperatorsite ... forC2003 ggttagattcataaatttgagagaggagtt BBa_R2111 SEQIDNO:677Promoterwithoperatorsite ... forC2003 acttagattcataaatttgagagaggagtt BBa_R2112 SEQIDNO:678Promoterwithoperatorsite ... forC2003 aattagattcataaatttgagagaggagtt BBa_R2113 SEQIDNO:679Promoterwithoperatorsite ... forC2003 acttagattcataaatttgagagaggagtt BBa_R2114 SEQIDNO:680Promoterwithoperatorsite ... forC2003 atttagattcataaatttgagagaggagtt BBa_R2201 SEQIDNO:681C2006-repressiblepromoter ... cacgcgcgtgggaatgttataatacgtca g BBa_S04209 SEQIDNO:682R0051:Q04121:B0034:C0079: ... B0015 actgagcacatactagagaaagaggaga aa

(119) TABLE-US-00037 TABLE36 ExamplesofNegativelyregulated(repressible)E.coli.sup.Spromoters Name Description PromoterSequence BBa_K086030 SEQIDNO:683modifiedLutz-Bujard ... LacOpromoter,withalternative cagtgagcgagtaacaactacgctgtttta sigmafactor38 BBa_K086031 SEQIDNO:684modifiedLutz-Bujard ... LacOpromoter,withalternativesigma cagtgagcgagtaacaactacgctgtttta factor38 BBa_K086032 SEQIDNO:685modifiedLutz-Bujard ... LacOpromoter,withalternativesigma atgtgagcggataacactataattaataga factor38 BBa_K086033 SEQIDNO:686modifiedLutz-Bujard ... LacOpromoter,withalternativesigma atgtgagcggataacactataattaataga factor38 BBa_K112318 SEQIDNO:687{<bolApromoter>} in ... BBbformat atttcatgatgatacgtgagcggatagaag

(120) TABLE-US-00038 TABLE37 ExamplesofNegativelyregulated(repressible)E.coli32promoters Name Description PromoterSequence BBa_K086026 SEQIDNO:688modifiedLutz-Bujard ... LacOpromoter,withalternativesigma ttgtgagcgagtggcaccattaagtacgta factor32 BBa_K086027 SEQIDNO:689modifiedLutz-Bujard ... LacOpromoter,withalternativesigma ttgtgagcgagtgacaccattaagtacgta factor32 BBa_K086028 SEQIDNO:690modifiedLutz-Bujard ... LacOpromoter,withalternativesigma ttgtgagcgagtaacaccattaagtacgta factor32 BBa_K086029 SEQIDNO:691modifiedLutz-Bujard ... LacOpromoter,withalternativesigma ttgtgagcgagtaacaccattaagtacgta factor32

(121) TABLE-US-00039 TABLE38 ExamplesofNegativelyregulated(repressible)E.coli54promoters Name Description PromoterSequence BBa_J64979 SEQIDNO:692glnAp2 ...agttggcacagatttcgctttatctttttt

(122) TABLE-US-00040 TABLE39 Examples of Repressible B. subtilis .sup.A promoters Name Description PromoterSequence BBa_K090501 SEQIDNO:693 Gram-PositiveIPTG- ... InduciblePromoter tggaattgtgagcggataacaattaagctt BBa_K143014 SEQIDNO:694 PromoterXylfor ... B.subtilis agtttgtttaaacaacaaactaataggtga BBa_K143015 SEQIDNO:695 Promoterhyper-spankfor ... B.subtilis aatgtgtgtaattgtgagcggataacaatt

(123) TABLE-US-00041 TABLE40 Examples of T7 Repressible Promoters Name Description PromoterSequence BBa_R0184 SEQIDNO:696 T7promoter(lacI ... repressible) ataggggaattgtgagcggataacaattcc BBa_R0185 SEQIDNO:697 T7promoter(lacI ... repressible) ataggggaattgtgagcggataacaattcc BBa_R0186 SEQIDNO:698 T7promoter(lacI ... repressible) ataggggaattgtgagcggataacaattcc BBa_R0187 SEQIDNO:699 T7promoter(lacI ... repressible) ataggggaattgtgagcggataacaattcc

(124) TABLE-US-00042 TABLE41 Examples of Yeast Repressible Promoters Name Description PromoterSequence BBa_I766558 SEQIDNO:700 pFigl(Inducible) ... Promoter aaacaaacaaacaaaaaaaaaaaaaaaaaa BBa_1766214 SEQIDNO:701 pGall ...atactttaacgtcaaggagaaaaaactata BBa_K165000 SEQIDNO:702 MET25Promoter ...tagatacaattctattacccccatccatac

(125) TABLE-US-00043 TABLE42 Examples of Eukaryotic Repressible Promoters Name Description PromoterSequence BBa_1756015 SEQIDNO:703 CMVPromoterwithlac ...ttagtgaaccgtcagatcactagtctgcag operatorsites BBa_1756016 SEQIDNO:704 CMV-tetpromoter ...ttagtgaaccgtcagatcactagtctgcag BBa_1756017 SEQIDNO:705 U6promoterwithtet ... operators ggaaaggacgaaacaccgactagtctgcag BBa_1756018 SEQIDNO:706 LambdaOperatorin ...attgtttgtgtattttagactagtctgcag SV-40intron BBa_1756019 SEQIDNO:707 LacOperatorinSV-40 ...attgtttgtgtattttagactagtctgcag intron BBa_1756020 SEQIDNO:708 TetOperatorinSV-40 ...attgtttgtgtattttagactagtctgcag intron BBa_1756021 SEQIDNO:709 CMVpromoterwith ...ttagtgaaccgtcagatcactagtctgcag LambdaOperator

(126) TABLE-US-00044 TABLE43 Examples of Combination Inducible & Repressible E. coli Promoters Name Description PromoterSequence BBa_I1051 SEQIDNO:710 Luxcassetteright ... promoter tgttatagtcgaatacctctggcggtgata BBa_I12006 SEQIDNO:711 Modifiedlamdba ...attacaaactttcttgtatagatttaacgt Prmpromoter(repressedby434cI) BBa_I12036 SEQIDNO:712 Modifiedlamdba ...tttcttgtatagatttacaatgtatcttgt Prmpromotoer(cooperativerepressionby434cI) BBa_I12040 SEQIDNO:713 Modifiedlambda ...tttcttgtagatacttacaatgtatcttgt P(RM)promotoer:10regionfromP(L)and cooperativelyrepressedby434cI BBa_I14015 SEQIDNO:714 P(Las)TetO ... ttttggtacactccctatcagtgatagaga BBa_I14016 SEQIDNO:715 P(Las)CIO ... ctttttggtacactacctctggcggtgata BBa_I714924 SEQIDNO:716 RecA_DlexO_DLacO1 ... actctcggcatggacgagctgtacaagtaa BBa_I731004 SEQIDNO:717 FecApromoter ... ttctcgttcgactcatagctgaacacaaca BBa_I732301 SEQIDNO:718 NANDCandidate ... (U073O26D001O17) ggaattgtgagcgctcataattggatccgg BBa_I732302 SEQIDNO:719 NANDCandidate ... (U073O27D001O17) ggaattgtgagctacagtcgtcggatccgg BBa_I732303 SEQIDNO:720 NANDCandidate ... (U073O22D001O46) ggaattgtgaacgctcataattggatccgg BBa_I732304 SEQIDNO:721 NANDCandidate ... (U073O22D001O47) ggaattgtgaactacagtcgtcggatccgg BBa_I732305 SEQIDNO:722 NANDCandidate ... (U073O22D059O46) taaattgtgaacgctcataattggatccgg BBa_I732306 SEQIDNO:723 NANDCandidate ... (U073O11D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732351 SEQIDNO:724 NORCandidate ... (U037O11D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732352 SEQIDNO:725 NORCandidate ... (U035O44D001O22) ggaattgtaagcgcttacaattggatccgg BBa_I732400 SEQIDNO:726 PromoterFamily ... Member(U097NUL+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732401 SEQIDNO:727 PromoterFamily ... Member(U097O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732402 SEQIDNO:728 PromoterFamily ... Member(U085O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732403 SEQIDNO:729 PromoterFamily ... Member(U073O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732404 SEQIDNO:730 PromoterFamily ... Member(U061O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732405 SEQIDNO:731 PromoterFamily ... Member(U049O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732406 SEQIDNO:732 PromoterFamily ... Member(U037O11+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732407 SEQIDNO:733 PromoterFamily ... Member(U097NUL+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732408 SEQIDNO:734 PromoterFamily ... Member(U097NUL+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732409 SEQIDNO:735 PromoterFamily ... Member(U097NUL+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732410 SEQIDNO:736 PromoterFamily ... Member(U097NUL+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732411 SEQIDNO:737 PromoterFamily ... Member(U097NUL+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_732412 SEQIDNO:738 PromoterFamily ... Member(U097NUL+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732413 SEQIDNO:739 PromoterFamily ... Member(U097O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732414 SEQIDNO:740 PromoterFamily ... Member(U097O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732415 SEQIDNO:741 PromoterFamily ... Member(U097O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732416 SEQIDNO:742 PromoterFamily ... Member(U097O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732417 SEQIDNO:743 PromoterFamily ... Member(U097O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732418 SEQIDNO:744 PromoterFamily ... Member(U097O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732419 SEQIDNO:745 PromoterFamily ... Member(U085O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732420 SEQIDNO:746 PromoterFamily ... Member(U085O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732421 SEQIDNO:747 PromoterFamily ... Member(U085O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732422 SEQIDNO:748 PromoterFamily ... Member(U085O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732423 SEQIDNO:749 PromoterFamily ... Member(U085O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732424 SEQIDNO:750 PromoterFamily ... Member(U085O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732425 SEQIDNO:751 PromoterFamily ... Member(U073O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732426 SEQIDNO:752 PromoterFamily ... Member(U073O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732427 SEQIDNO:753 PromoterFamily ... Member(U073O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732428 SEQIDNO:754 PromoterFamily ... Member(U073O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732429 SEQIDNO:755 PromoterFamily ... Member(U073O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732430 SEQIDNO:756 PromoterFamily ... Member(U073O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732431 SEQIDNO:757 PromoterFamily ... Member(U061O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732432 SEQIDNO:758 PromoterFamily ... Member(U061O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732433 SEQIDNO:759 PromoterFamily ... Member(U061O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732434 SEQIDNO:760 PromoterFamily ... Member(U061O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732435 SEQIDNO:761 PromoterFamily ... Member(U061O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732436 SEQIDNO:762 PromoterFamily ... Member(U061O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732437 SEQIDNO:763 PromoterFamily ... Member(U049O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732438 SEQIDNO:764 PromoterFamily ... Member(U049O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732439 SEQIDNO:765 PromoterFamily ... Member(U049O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732440 SEQIDNO:766 PromoterFamily ... Member(U049O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732441 SEQIDNO:767 PromoterFamily ... Member(U049O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732442 SEQIDNO:768 PromoterFamily ... Member(U049O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732443 SEQIDNO:769 PromoterFamily ... Member(U037O11+ D002O22) gaaattgtaagcgcttacaattggatccgg BBa_I732444 SEQIDNO:770 PromoterFamily ... Member(U037O11+ D014O22) taaattgtaagcgcttacaattggatccgg BBa_I732445 SEQIDNO:771 PromoterFamily ... Member(U037O11+ D026O22) gtaattgtaagcgcttacaattggatccgg BBa_I732446 SEQIDNO:772 PromoterFamily ... Member(U037O11+ D038O22) tcaattgtaagcgcttacaattggatccgg BBa_I732447 SEQIDNO:773 PromoterFamily ... Member(U037O11+ D050O22) aaaattgtaagcgcttacaattggatccgg BBa_I732448 SEQIDNO:774 PromoterFamily ... Member(U037O11+ D062O22) caaattgtaagcgcttacaattggatccgg BBa_I732450 SEQIDNO:775 PromoterFamily ... Member(U073O26+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732451 SEQIDNO:776 PromoterFamily ... Member(U073O27+ D062NUL) gccaaattaaacaggattaacaggatccgg BBa_I732452 SEQIDNO:777 PromoterFamily ... Member(U073O26+ D062061) caaattatgagcgctcacaattggatccgg BBa_I739102 SEQIDNO:778 DoublePromoter ... (cI,negative/TetR,negative) tgatagagattccctatcagtgatagagat BBa_I739103 SEQIDNO:779 DoublePromoter ...gttctttaattatttaagtgttctttaatt (lacI,negative/P22cII,negative) BBa_I739104 SEQIDNO:780 DoublePromoter ...gttctttaattatttaagtgttctttaatt (LuxR/HSL,positive/P22cII,negative) BBa_I739105 SEQIDNO:781 DoublePromoter ... (LuxR/HSL,positive/cI,negative) cgtgcgtgttgataacaccgtgcgtgttga BBa_I739106 SEQIDNO:782 DoublePromoter ...gtgttctttaatatttaagtgttctttaat (TetR,negative/P22cII,negative) BBa_I739107 SEQIDNO:783 DoublePromoter ... (cI,negative/LacI,negative) ggaattgtgagcggataacaatttcacaca BBa_I741018 SEQIDNO:784 Rightfacing ...gttacgtttatcgcggtgattgttacttat promoter(forxylF)controlledbyxylRandCRP- cAMP BBa_I741019 SEQIDNO:785 Rightfacing ... promoter(forxylA)controlledbyxylRandCRP- gcaaaataaaatggaatgatgaaactgggt cAMP BBa_I742124 SEQIDNO:786 Reversecomplement ... Lacpromoter aacgcgcggggagaggcggtttgcgtattg BBaJ751501 SEQIDNO:787 plux-cIhybrid ... promoter gtgttgatgcttttatcaccgccagtggta BBa_I751502 SEQIDNO:788 plux-lachybrid ... promoter agtgtgtggaattgtgagcggataacaatt BBa_I761011 SEQIDNO:789 CinR,CinLand ...acatcttaaaagttttagtatcatattcgt glucosecontrolledpromoter BBa_I765007 SEQIDNO:790 FeandUV ... promoters ctgaaagcgcataccgctatggagggggtt BBa_J05209 SEQIDNO:791 ModifiedPr ... Promoter tattttacctctggcggtgataatggttgc BBa_J05210 SEQIDNO:792 ModifiedPrm+ ...atttataaatagtggtgatagatttaacgt Promoter BBa_J58100 SEQIDNO:793 ANDtype ...atttataaatagtggtgatagatttaacgt promotersynergisticallyactivatedbycIandCRP BBa_J64712 SEQIDNO:794 LasR/LasI ... Inducible&RHLR/RHLIrepressiblePromoter gaaatctggcagtttttggtacacgaaagc BBa_J64800 SEQIDNO:795 RHLR/RHLI ... Inducible&LasR/LasIrepressiblePromoter tgccagttctggcaggtctaaaaagtgttc BBa_J64804 SEQIDNO:796 Thepromoter ... region(inclusiveofregulatorbindingsites) cacagaacttgcatttatataaagggaaag oftheB.subtilisRocDEFoperon BBa_J64979 SEQIDNO:797 glnAp2 ...agttggcacagatttcgctttatctttttt BBa_J64981 SEQIDNO:798 OmpR-Pstrong ... binding,regulatoryregionforTeamChallenge03- agcgctcacaatttaatacgactcactata 2007 BBa_K091100 SEQIDNO:799 pLac_luxhybridpromoter ... ggaattgtgagcggataacaatttcacaca BBa_K091101 SEQIDNO:800 pTet_Lachybridpromoter ... ggaattgtgagcggataacaatttcacaca BBa_K091104 SEQIDNO:801 pLac/MntHybridPromoter ... ggaattgtgagcggataacaatttcacaca BBa_K091105 SEQIDNO:802 pTet/MntHybridPromoter ... agaactgtaatccctatcagtgatagagat BBa_K091106 SEQIDNO:803 LsrA/cIhybridpromoter ...tgttgatttatctaacaccgtgcgtgttga BBa_K091107 SEQIDNO:804 pLux/cIHybridPromoter ... acaccgtgcgtgttgatatagtcgaataaa BBa_K091143 SEQIDNO:805 pLas/cIHybridPromoter ... ggttctttttggtacctctggcggtgataa BBa_K091146 SEQIDNO:806 pLas/LuxHybridPromoter ... tgtaggatcgtacaggtataaattcttcag BBa_K091157 SEQIDNO:807 pLux/LasHybridPromoter ...ctatctcatttgctagtatagtcgaataaa BBa_K094120 SEQIDNO:808 pLacI/ara-1 ... aattgtgagcggataacaatttcacacaga BBa_K100000 SEQIDNO:809 NaturalXyloseRegulated ...gttacgtttatcgcggtgattgttacttat BiDirectionalOperator BBa_K101000 SEQIDNO:810 Dual-RepressedPromoter ... forp22mntandTetR acggtgacctagatctccgatactgagcac BBa_K101001 SEQIDNO:811 Dual-RepressedPromoter ... forLacIandLambdacI tggaattgtgagcggataaaatttcacaca BBa_K101002 SEQIDNO:812 Dual-RepressedPromoter ...tagtagataatttaagtgttctttaatttc forp22cIIandTetR BBa_K109200 SEQIDNO:813 AraCandTetRpromoter ... (hybrid) aacaaaaaaacggatcctctagttgcggcc BBa_K112118 SEQIDNO:814 rrnBP1promoter ... ataaatgcttgactctgtagcgggaaggcg BBa_K112318 SEQIDNO:815 {<bolApromoter>} inBBb ... format atttcatgatgatacgtgagcggatagaag BBa_K112322 SEQIDNO:816 {Pdps} inBBbformat ... gggacacaaacatcaagaggatatgagatt BBa_K112402 SEQIDNO:817 promoterforFabAgene- ... MembraneDamageandUltrasound gtcaaaatgaccgaaacgggtggtaacttc Sensitive BBa_K112405 SEQIDNO:818 PromoterforCadAand ... CadBgenes agtaatcttatcgccagtttggtctggtca BBa_K112406 SEQIDNO:819 cadCpromoter ... agtaatcttatcgccagtttggtctggtca BBa_K112701 SEQIDNO:820 hnspromoter ... aattctgaacaacatccgtactcttcgtgc BBa_K116001 SEQIDNO:821 nhaApromoter,thatcan ... beregulatedbypHandnhaRprotein. cgatctattcacctgaaagagaaataaaaa BBa_K116500 SEQIDNO:822 OmpFpromoterthatis ... activatedorrepressedbyOmpRaccordingto osmolarity. BBa_K121011 SEQIDNO:823 promoter(ladregulated) ... acaggaaacagctatgaccatgattacgcc BBa_K136010 SEQIDNO:824 fliApromoter ... gttcactctataccgctgaaggtgtaatgg BBa_K145150 SEQIDNO:825 Hybridpromoter:HSL- ...tagtttataatttaagtgttctttaatttc LuxRactivated,P22C2repressed BBa_K145152 SEQIDNO:826 Hybridpromoter:P22c2, ... LacINORgate gaaaatgtgagcgagtaacaacctcacaca BBa_K259005 SEQIDNO:827 AraCRheostatPromoter ...ttttatcgcaactctctactgtttctccat BBa_K259007 SEQIDNO:828 AraCPromoterfusedwith ... RBS gtttctccattactagagaaagaggggaca BBa_K266005 SEQIDNO:829 PAI+ LasR.fwdarw. LasI& ... AI+ LuxR| LasI aataactctgatagtgctagtgtagatctc BBa_K266006 SEQIDNO:830 PAI+ LasR.fwdarw. LasI+ GFP& ... AI+ LuxR| LasI+ GFP caccttcgggtgggcctttctgcgtttata BBa_K266007 SEQIDNO:831 ComplexQS.fwdarw. LuxI&LasI ... circuit caccttcgggtgggcctttctgcgtttata BBa_R0065 SEQIDNO:832 Promoter(lambdacIand ... luxRregulated hybrid) gtgttgactattttacctctggcggtgata

(127) TABLE-US-00045 TABLE44 Examples of Combination Inducible & Repressible Miscellaneous Prokaryotic Promoters Name Description PromoterSequence BBa_K125100 SEQIDNO:833 nirpromoter ... fromSynechocystissp.PCC6803 cgaaacgggaaccctatattgatctctact

(128) TABLE-US-00046 TABLE45 Examples of Combination Inducible & Repressible Miscellaneous Yeast Promoters Name Description PromoterSequence BBa_I766200 SEQIDNO:834 pSte2 ... accgttaagaaccatatccaagaatcaaaa BBa_K110016 SEQIDNO:835 A-CellPromoterSTE2 ... (backwards) accgttaagaaccatatccaagaatcaaaa BBa_K165034 SEQIDNO:836 Zif268-HIVbs+ LexAbs ... + mCYCpromoter cacaaatacacacactaaattaataactag BBa_K165041 SEQIDNO:837 Zif268-HIVbindingsites ... + TEFconstitutiveyeastpromoter atacggtcaacgaactataattaactaaac BBa_K165043 SEQIDNO:838 Zif268-HIVbindingsites ... + MET25constitutiveyeastpromoter tagatacaattctattacccccatccatac

(129) TABLE-US-00047 TABLE46 Examples of Combination Inducible & Repressible Miscellaneous Eukaryotic Promoters Name Description PromoterSequence BBa_J05215 SEQIDNO:839 RegulatorforR1- ... CREBH ggggcgagggccccgcctccggaggcgggg BBa_J05216 SEQIDNO:840 RegulatorforR3- ... ATF6 gaggggacggctccggccccggggccggag BBa_J05217 SEQIDNO:841 RegulatorforR2- ... YAP7 ggggcgagggctccggccccggggccggag BBa_J05218 SEQIDNO:842 RegulatorforR4- ... cMaf gaggggacggccccgcctccggaggcgggg
Ribosome Binding Sites

(130) Ribosome binding sites (RBS) are sequences that promote efficient and accurate translation of mRNAs for protein synthesis, and are also provided for use in the modules and biological converter switches of the invention to enable modulation of the efficiency and rates of synthesis of the proteins encoded by the switches, such as recombinases and repressors. The RBS affects the translation rate of an open reading frame in two main waysi) the rate at which ribosomes are recruited to the mRNA and initiate translation is dependent on the sequence of the RBS, and ii) the RBS can also affect the stability of the mRNA, thereby affecting the number of proteins made over the lifetime of the mRNA. Accordingly, one or more ribosome binding site (RBS) can be added to the modules and engineered genetic counters described herein to control expression of proteins, such as recombinases.

(131) Translation initiation in prokaryotes is a complex process involving the ribosome, the mRNA, and several other proteins, such as initiation factors, as described in Laursen B S, et al., Microbiol Mol Biol Rev 2005 March; 69(1) 101-23. Translation initiation can be broken down into two major stepsi) binding of the ribosome and associated factors to the mRNA, and ii) conversion of the bound ribosome into a translating ribosome lengthening processing along the mRNA. The rate of the first step can be increased by making the RBS highly complementary to the free end of the 16s rRNA and by ensuring that the start codon is AUG. The rate of ribosome binding can also be increased by ensuring that there is minimal secondary structure in the neighborhood of the RBS. Since binding between the RBS and the ribosome is mediated by base-pairing interactions, competition for the RBS from other sequences on the mRNA, can reduce the rate of ribosome binding. The rate of the second step in translation initiation, conversion of the bound ribosome into an initiation complex is dependent on the spacing between the RBS and the start codon being optimal (5-6 bp).

(132) Thus, a ribosome binding site (RBS), as defined herein, is a segment of the 5 (upstream) part of an mRNA molecule that binds to the ribosome to position the message correctly for the initiation of translation. The RBS controls the accuracy and efficiency with which the translation of mRNA begins. In prokaryotes (such as E. coli) the RBS typically lies about 7 nucleotides upstream from the start codon (i.e., the first AUG). The sequence itself in general is called the Shine-Dalgarno sequence after its discoverers, regardless of the exact identity of the bases. Strong Shine-Dalgarno sequences are rich in purines (A's,G's), and the Shine-Dalgarno consensus sequencederived statistically from lining up many well-characterized strong ribosome binding siteshas the sequence AGGAGG. The complementary sequence (CCUCCU) occurs at the 3-end of the structural RNA (16S) of the small ribosomal subunit and it base-pairs with the Shine-Dalgarno sequence in the mRNA to facilitate proper initiation of protein synthesis. In some embodiments of aspects described herein, a ribosome binding site (RBS) is added to an engineered genetic counter to regulate expression of a recombinase.

(133) For protein synthesis in eukaryotes and eukaryotic cells, the 5 end of the mRNA has a modified chemical structure (cap) recognized by the ribosome, which then binds the mRNA and moves along it (scans) until it finds the first AUG codon. A characteristic pattern of bases (called a Kozak sequence) is sometimes found around that codon and assists in positioning the mRNA correctly in a manner reminiscent of the Shine-Dalgarno sequence, but does not involve base pairing with the ribosomal RNA.

(134) RBSs can include only a portion of the Shine-Dalgarno sequence. When looking at the spacing between the RBS and the start codon, the aligned spacing rather than just the absolute spacing is important. In essence, if only a portion of the Shine-Dalgarno sequence is included in the RBS, the spacing that matters is between wherever the center of the full Shine-Dalgarno sequence would be and the start codon rather than between the included portion of the Shine-Dalgarno sequence and the start codon.

(135) While the Shine-Dalgarno portion of the RBS is critical to the strength of the RBS, the sequence upstream of the Shine-Dalgarno sequence is also important. One of the ribosomal proteins, S1, is known to bind to adenine bases upstream from the Shine-Dalgarno sequence. As a result, in some embodiments of the modules and engineered genetic counters described herein, an RBS can be made stronger by adding more adenines to the sequence upstream of the RBS. A promoter may add some bases onto the start of the mRNA that may affect the strength of the RBS by affecting S1 binding.

(136) In addition, the degree of secondary structure can affect the translation initiation rate. This fact can be used to produce regulated translation initiation rates, as described in Isaacs F J et al., Nat Biotechnol 2004 July; 22(7) 841-7.

(137) In addition to affecting the translation rate per unit time, an RBS affects the level of protein synthesis in a second way. That is because the stability of the mRNA affects the steady state level of mRNA, i.e., a stable mRNA will have a higher steady state level than an unstable mRNA that is being produced as an identical rate. Since the primary sequence and the secondary structure of an RBS (for example, the RBS could introduce an RNase site) can affect the stability of the mRNA, the RBS can affect the amount of mRNA and hence the amount of protein that is synthesized.

(138) A regulated RBS is an RBS for which the binding affinity of the RBS and the ribosome can be controlled, thereby changing the RBS strength. One strategy for regulating the strength of prokaryotic RBSs is to control the accessibility of the RBS to the ribosome. By occluding the RBS in RNA secondary structure, translation initiation can be significantly reduced. By contrast, by reducing secondary structure and revealing the RBS, translation initiation rate can be increased. Isaacs and coworkers engineered mRNA sequences with an upstream sequence partially complementary to the RBS. Base-pairing between the upstream sequence and the RBS locks the RBS off. A key RNA molecule that disrupts the mRNA secondary structure by preferentially base-pairing with the upstream sequence can be used to expose the RBS and increase translation initiation rate. In some embodiments, the ribosome binding site (RBS) comprises a sequence that is selected from the group consisting of SEQ ID NO: 843-SEQ ID NO: 850 presented in Table 47. In some embodiments, the ribosome binding site (RBS) is selected from the ribosome binding site sequences presented in Tables 48-53. In some embodiments, novel ribosome binding sites can be generated using automated design of synthetic ribosome sites, as described in Salis H M et al., Nature Biotechnology 27, 946-950 (2009).

(139) TABLE-US-00048 TABLE47 SEQIDNO:843 RBS-A AGGAGGAAAAAAATG SEQIDNO:844 RBS-B AGGAATTTAAATG SEQIDNO:845 RBS-C AGGAAACAGACCATG SEQIDNO:846 RBS-D AGGAAACCGGTTCGATG SEQIDNO:847 RBS-E AGGAAACCGGTTATG SEQIDNO:848 RBS-F AGGACGGTTCGATG SEQIDNO:849 RBS-G AGGAAAGGCCTCGATG SEQIDNO:850 RBS-H AGGACGGCCGGATG

(140) TABLE-US-00049 TABLE48 Examples of RBS Sequences (underlines indicate consensus sequence) Identifier Sequence SEQIDNO:851 Master TCTAGAGAAAGANNNGANNNACTAGATG Sequence SEQIDNO:852 BBa_J61100 TCTAGAGAAAGAGGGGACAAACTAGATG SEQIDNO:853 BBa_J61101 TCTAGAGAAAGACAGGACCCACTAGATG SEQIDNO:854 BBa_J61102 TCTAGAGAAAGATCCGATGTACTAGATG SEQIDNO:855 BBa_J61103 TCTAGAGAAAGATTAGACAAACTAGATG SEQIDNO:856 BBa_J61104 TCTAGAGAAAGAAGGGACAGACTAGATG SEQIDNO:857 BBa_J61105 TCTAGAGAAAGACATGACGTACTAGATG SEQIDNO:858 BBa_J61106 TCTAGAGAAAGATAGGAGACACTAGATG SEQIDNO:859 BBa_J61107 TCTAGAGAAAGAAGAGACTCACTAGATG SEQIDNO:860 BBa_J61108 TCTAGAGAAAGACGAGATATACTAGATG SEQIDNO:861 BBa_J61109 TCTAGAGAAAGACTGGAGACACTAGATG SEQIDNO:862 BBa_J61110 TCTAGAGAAAGAGGCGAATTACTAGATG SEQIDNO:863 BBa_J61111 TCTAGAGAAAGAGGCGATACACTAGATG SEQIDNO:864 BBa_J61112 TCTAGAGAAAGAGGTGACATACTAGATG SEQIDNO:865 BBa_J61113 TCTAGAGAAAGAGTGGAAAAACTAGATG SEQIDNO:866 BBa_J61114 TCTAGAGAAAGATGAGAAGAACTAGATG SEQIDNO:867 BBa_J61115 TCTAGAGAAAGAAGGGATACACTAGATG SEQIDNO:868 BBa_J61116 TCTAGAGAAAGACATGAGGCACTAGATG SEQIDNO:869 BBa_J61117 TCTAGAGAAAGACATGAGTTACTAGATG SEQIDNO:870 BBa_J61118 TCTAGAGAAAGAGACGAATCACTAGATG SEQIDNO:871 BBa_J61119 TCTAGAGAAAGATTTGATATACTAGATG SEQIDNO:872 BBa_J61120 TCTAGAGAAAGACGCGAGAAACTAGATG SEQIDNO:873 BBa_J61121 TCTAGAGAAAGAGACGAGTCACTAGATG SEQIDNO:874 BBa_J61122 TCTAGAGAAAGAGAGGAGCCACTAGATG SEQIDNO:875 BBa_J61123 TCTAGAGAAAGAGATGACTAACTAGATG SEQIDNO:876 BBa_J61124 TCTAGAGAAAGAGCCGACATACTAGATG SEQIDNO:877 BBa_J61125 TCTAGAGAAAGAGCCGAGTTACTAGATG SEQIDNO:878 BBa_J61126 TCTAGAGAAAGAGGTGACTCACTAGATG SEQIDNO:879 BBa_J61127 TCTAGAGAAAGAGTGGAACTACTAGATG SEQIDNO:880 BBa_J61128 TCTAGAGAAAGATAGGACTCACTAGATG SEQIDNO:881 BBa_J61129 TCTAGAGAAAGATTGGACGTACTAGATG SEQIDNO:882 BBa_J61130 TCTAGAGAAAGAAACGACATACTAGATG SEQIDNO:883 BBa_J61131 TCTAGAGAAAGAACCGAATTACTAGATG SEQIDNO:884 BBa_J61132 TCTAGAGAAAGACAGGATTAACTAGATG SEQIDNO:885 BBa_J61133 TCTAGAGAAAGACCCGAGACACTAGATG SEQIDNO:886 BBa_J61134 TCTAGAGAAAGACCGGAAATACTAGATG SEQIDNO:887 BBa_J61135 TCTAGAGAAAGACCGGAGACACTAGATG SEQIDNO:888 BBa_J61136 TCTAGAGAAAGAGCTGAGCAACTAGATG SEQIDNO:889 BBa_J61137 TCTAGAGAAAGAGTAGATCAACTAGATG SEQIDNO:890 BBa_J61138 TCTAGAGAAAGATATGAATAACTAGATG SEQIDNO:891 BBa_J61139 TCTAGAGAAAGATTAGAGTCACTAGATG

(141) TABLE-US-00050 TABLE49 Examples of Community RBS Sequences Measured Strength Identifier Sequence Set1 Set2 SEQIDNO:892 BBa_B002 TCTAGAGTTCACACAGGAAACCTACTAGATG 0.764 9 SEQIDNO:893 BBa_B003 TCTAGAGATTAAAGAGGAGAAATACTAGATG 0.6 0 SEQIDNO:894 BBa_B003 TCTAGAGTCACACAGGAAACCTACTAGATG 0.07 1 SEQIDNO:895 BBa_B003 TCTAGAGTCACACAGGAAAGTACTAGATG 0.3 0.376 2 SEQIDNO:896 BBa_B003 TCTAGAGTCACACAGGACTACTAGATG 0.01 0.002 3 SEQIDNO:897 BBa_B003 TCTAGAGAAAGAGGAGAAATACTAGATG 1 1 4 SEQIDNO:898 BBa_B003 TCTAGAGATTAAAGAGGAGAATACTAGATG 1.124 5 SEQIDNO:899 BBa_B006 TCTCAGAGAAAGAGGGGAAATACTAGATG 0.35 4

(142) TABLE-US-00051 TABLE50 Examples Miscellaneous Constitutive Prokaryotic RBS Name Sequence Description SEQIDNO:900 BBa_B0036 gtgtg SpecializedRBS SEQIDNO:901 BBa_B0037 gtgtgtctag SpecializedRBS SEQIDNO:902 BBa_B0038 tcacacaggaaaccggttcgatg RBS1 SEQIDNO:903 BBa_B0039 tcacacaggaaaggcctcgatg RBS2 SEQIDNO:904 BBa_B0041 tcacacaggacggccggatg RBS3 SEQIDNO:905 BBa_B0070 tctcacgtgtgtcaag SpecializedRBSmodified fromthatofB0036(Brink etal.) SEQIDNO:906 BBa_B0071 tctcacgtgtgt ISpecializedRBS SEQIDNO:907 BBa_B0076 catccct SpecializedRBS SEQIDNO:908 BBa_B0077 tcacatccct SpecializedRBS SEQIDNO:909 BBa_B0078 tcacatccctcc SpecializedRBS SEQIDNO:910 BBa_B2001 actgcacgaggtaacacaag T7RBS0.3 SEQIDNO:911 BBa_B2002 tacgaggaggatgaagagta T7RBS0.4 SEQIDNO:912 BBa_B2003 actttacttatgagggagta T7RBS0.5 SEQIDNO:913 BBa_B2017 acgaagacggagacttctaa 2.8RBSfromT7 SEQIDNO:914 BBa_B2022 aaccctcaggaggtaaacca 4BRBSfromT7 SEQIDNO:915 BBa_B2040 aagacatggagacacattta 8RBSfromT7 SEQIDNO:916 BBa_B2101 ... T7RBS0.3+ SapI(rev) gcacgaggtaacacaagatgtgaagagctg SEQIDNO:917 BBa_B2102 ... T7RBS0.4+ SapI(rev) gaggaggatgaagagtaatgtgaagagctg SEQIDNO:918 BBa_I11010 aggaggtcatc RBS SEQIDNO:919 BBa_I723012 gcaagctcttttttcagttgtctc EstimatedRBSforDntR SEQIDNO:920 BBa_I723014 ctgatagttaaaatcaccagcatga EstimatedRBSforDntA SEQIDNO:921 BBa_I723019 taaaaacaagaggaaaacaa RBSforXy1R SEQIDNO:922 BBa_I742130 tctcctcttt ReverseRBS SEQIDNO:923 BBa_I742145 acggagaagcagcgaa sam5nativerbs SEQIDNO:924 BBa_I742146 gaggttgggacaag sam8nativerbs SEQIDNO:925 BBa_I742150 ... crtEnativerbs taaatgtatccgtttataaggacagcccga SEQIDNO:926 BBa_I742153 ctcttaagtgggagcggct crtYnativerbs SEQIDNO:927 BBa_I742156 ctctaccggagaaatt crtZnativerbs SEQIDNO:928 BBa_I742159 ctcatcgttaaagagcgactac crtInativerbs SEQIDNO:929 BBa_I742163 ctcagcctgtacctggagagcctttc nativeftsKrbs SEQIDNO:930 BBa_J15001 ctcaaggagg strongsyntheticE.coli ribosomebindingsitewith SacIsite. SEQIDNO:931 BBa_J26002 gagagg MarioBindingSite SEQIDNO:932 BBa_J29048 aggaggattacaa RBS SEQIDNO:933 BBa_J34801 aaagaggagaaa ribosomebindingsite SEQIDNO:934 BBa_J34803 tcacacaggaaag ribosomebindingsite SEQIDNO:935 BBa_J34810 ggaagagg ribosomebindingsite SEQIDNO:936 BBa_J44001 tttctcctctttaat ReverseRBS(RBS.sub.rev) correspondstoBBa_B0030 SEQIDNO:937 BBa_J56013 tcacacaggaaaggcctcg Rbs2ribosomebindingsite SEQIDNO:938 BBa_J56016 attaaagaggagaaattaagc Rbs-orig ribosome bindingsite SEQIDNO:939 BBa_J59001 ...tcgtttctgaaaaattttcgtttctgaaaa tuba SEQIDNO:940 BBa_J61140 tggctaacatagggt {rbs1} LibraryMemberin BBb SEQIDNO:941 BBa_J61141 tggctaactgaggat {rbs1} LibraryMemberin BBb SEQIDNO:942 BBa_J61142 tggctaacccagggt {rbs1} LibraryMemberin BBb SEQIDNO:943 BBa_J61143 tggctaactcaggtg {rbs1} LibraryMemberin BBb SEQIDNO:944 BBa_J61144 tggctaaccctggta {rbs1} LibraryMemberin BBb SEQIDNO:945 BBa_J61145 tggctaacttgggac {rbs1} LibraryMemberin BBb SEQIDNO:946 BBa_J61146 tggctaacgcaggtc {rbs1} LibraryMemberin BBb SEQIDNO:947 BBa_J61147 tggctaacatcggtg {rbs1} LibraryMemberin BBb SEQIDNO:948 BBa_J64011 ttaattaaggaaaagatct invBRBS SEQIDNO:949 BBa_J64013 cagaagaggatattaata sipARBS SEQIDNO:950 BBa_J64015 ttgataaggaattgta sopARBS SEQIDNO:951 BBa_J64018 tcagaggagataattta invJRBS SEQIDNO:952 BBa_J64020 tgacacgttgagcggtatga invIRBS SEQIDNO:953 BBa_J64022 acagataacaggagtaagta sicARBS SEQIDNO:954 BBa_J64024 taaagggagaaaaat sipCRBS SEQIDNO:955 BBa_J64026 gagtcttgaggtaactat sigERBS SEQIDNO:956 BBa_J64028 tcaggaatattaaaaacgct sopBRBS SEQIDNO:957 BBa_J64030 atttgaaggaaaatatt sopDRBS SEQIDNO:958 BBa_J64031 caaaaacatactgcaggaat sptPRBS SEQIDNO:959 BBa_J64609 tgccattgcaaaggagaagact creDRBS SEQIDNO:960 BBa_J64807 aagggggaattcaaat RocDRBS SEQIDNO:961 BBa_J64808 aaggggtgcagaat RocERBS SEQIDNO:962 BBa_J64809 aggtggaatcacag RocFRBS SEQIDNO:963 BBa_J64907 atagataaaaatggtaacaat creARBS SEQIDNO:964 BBa_J64908 gggatatagcctgaggggcctgta RBSforcreCinecoli operon SEQIDNO:965 BBa_J64968 cggcaataacagaggcgattt RBSoncreB SEQIDNO:966 BBa_K082000 attaaagaggagaaata reconstructstrongRBS SEQIDNO:967 BBa_K082001 tcacacaggaaagta RBSmedium SEQIDNO:968 BBa_K090505 aaaggaggtgt Bacillussubtilis consensusRBS SEQIDNO:969 BBa_K090506 agaggtggtgt Bacillussubtilis weak RBS SEQIDNO:970 BBa_K103015 aggagg consensusRBS SEQIDNO:971 BBa_K118012 gagg Syntheticribosomebinding siteaddedbySonofBabel procedure SEQIDNO:972 BBa_K143020 taaaggaggaa GsiBribosomebindingsite (RBS)forB.subtilis SEQIDNO:973 BBa_K143021 aaaggtggtgaa SpoVGribosomebinding site(RBS)forB.subtilis SEQIDNO:974 BBa_K150005 aggaaacagaacc ribosomebindingsiteof pTrc99a SEQIDNO:975 BBa_M13501 gattgggataaataat M13K07geneIRBS SEQIDNO:976 BBa_M13502 atcaaccggggtacat M13KO7geneIIRBS SEQIDNO:977 BBa_M13503 tttggagattttcaac M13K07geneIIIRBS SEQIDNO:978 BBa_M13504 aaaaaaggtaattcaa M13K07geneIVRBS SEQIDNO:979 BBa_M13505 cataaggtaattcaca M13KO7geneVRBS SEQIDNO:980 BBa_M13506 ataaggagtcttaatc M13K07geneVIRBS SEQIDNO:981 BBa_M13507 gttccggctaagtaac M13KO7geneVIIRBS SEQIDNO:982 BBa_M13508 taatggaaacttcctc M13K07geneVIIIRBS SEQIDNO:983 BBa_M13509 tcgctgggggtcaaag M13Ko7geneIXRBS SEQIDNO:984 BBa_M13510 atttgagggggattca M13KO7geneXRBS SEQIDNO:985 BBa_M13511 aatttaggtcagaag M13K07geneXIRBS SEQIDNO:986 BBa_Z0261 aatcaataggagaaatcaat StrongT7.2RBS SEQIDNO:987 BBa_Z0262 ttaaagaggagaaatactag MediumstrengthT7.2 RBS

(143) TABLE-US-00052 TABLE51 Examples of Regulated Prokaryotic RBS Identifier Sequence SEQIDNO:988 TCTAGAGAACTAGAATCACCTCTTGGATTTGGGTATTAAAGAGGAGATA BBa_J01010 CTAGATG SEQIDNO:989 TCTAGAGAACTAGAATCACCTCTTGCTTTTGGGTAAGAAAGAGGAGATA BBa_J01080 CTAGATG

(144) TABLE-US-00053 TABLE52 Examples of Regulated Yeast RBS Name Sequence Description SEQIDNO:990 BBa_J63003 cccgccgccaccatggag designedyeastKozaksequence SEQIDNO:991 BBa_K165002 cccgccgccaccatggag Kozaksequence(yeastRBS)

(145) TABLE-US-00054 TABLE53 Examples of Eukaryotic RBS Identifier Sequence.sup.a Strength.sup.b SEQIDNO: BBa_B0072 TCTAGAGCACCACTACTAGATG 0.24 992 SEQIDNO: BBa_B0073 TCTAGAGTCACACCACTACTAG 1 993 ATG SEQIDNO: BBa_B0074 TCTAGAGTCACACCACCCTACT 0.84 994 AGATG
Terminators

(146) In some embodiments, terminator sequences are provided for use in the modules and engineered genetic counters described herein. Terminators are genetic sequences that usually occur at the end of a gene or operon and cause transcription to stop. As described herein, a terminator sequence prevents activation of downstream modules by upstream promoters. A terminator or termination signal, as described herein, is comprised of the DNA sequences involved in specific termination of an RNA transcript by an RNA polymerase. Thus, in certain embodiments a terminator that ends the production of an RNA transcript is contemplated. A terminator may be necessary in vivo to achieve desirable message levels.

(147) In prokaryotes, terminators usually fall into two categories (1) rho-independent terminators and (2) rho-dependent terminators. Rho-independent terminators are generally composed of palindromic sequence that forms a stem loop rich in G-C base pairs followed by several T bases. Without wishing to be bound by a theory, the conventional model of transcriptional termination is that the stem loop causes RNA polymerase to pause, and transcription of the poly-A tail causes the RNA:DNA duplex to unwind and dissociate from RNA polymerase.

(148) The most commonly used type of terminator is a forward terminator. When placed downstream of a nucleic acid sequence that is usually transcribed, a forward transcriptional terminator will cause transcription to abort. In some embodiments, bidirectional transcriptional terminators are provided. Such terminators will usually cause transcription to terminate on both the forward and reverse strand. Finally, In some embodiments, reverse transcriptional terminators are provided that terminate transcription on the reverse strand only.

(149) In eukaryotic systems, the terminator region may also comprise specific DNA sequences that permit site-specific cleavage of the new transcript so as to expose a polyadenylation site. This signals a specialized endogenous polymerase to add a stretch of about 200 A residues (polyA) to the 3 end of the transcript. RNA molecules modified with this polyA tail appear to more stable and are translated more efficiently. Thus, in other embodiments involving eukaryotes, it is preferred that a terminator comprises a signal for the cleavage of the RNA, and it is more preferred that the terminator signal promotes polyadenylation of the message. The terminator and/or polyadenylation site elements can serve to enhance message levels and/or to minimize read through between modules of the engineered genetic counters. As disclosed herein, terminators contemplated for use in the modules, engineered genetic counters, and methods of use thereof include any known terminator of transcription described herein or known to one of ordinary skill in the art. Such terminators include, but are not limited to, the termination sequences of genes, such as for example, the bovine growth hormone terminator, or viral termination sequences, such as for example, the SV40 terminator. In certain embodiments, the termination signal may be a lack of transcribable or translatable sequence, such as due to a sequence truncation. The terminator used can be unidirectional or bidirectional.

(150) Terminators of use in the engineered genetic counters described herein can be selected from the non-limiting examples of Tables 54-58.

(151) TABLE-US-00055 TABLE 54 Examples of Forward Terminators Efficiency Name Description Direction Fwd. Rev. Length BBa_B0010 T1 from E. coli rrnB Forward 80 BBa_B0012 TE from coliphageT7 Forward 0.309[CC] 0.368[CC] 41 BBa_B0013 TE from coliphage T7 (+/) Forward 0.6[CC] 1.06[CC] 47 BBa_B0015 double terminator (B0010-B0012) Forward 0.984[CC] 0.295[CC] 129 0.97[JK] 0.62[JK] BBa_B0017 double terminator (B0010-B0010) Forward 168 BBa_B0053 Terminator (His) Forward 72 BBa_B0055 -- No description -- 78 BBa_B1002 Terminator (artificial, small, % T ~= 85%) Forward 0.98[CH] 34 BBa_B1003 Terminator (artificial, small, % T ~= 80) Forward 0.83[CH] 34 BBa_B1004 Terminator (artificial, small, % T ~= 55) Forward 0.93[CH] 34 BBa_B1005 Terminator (artificial, small, % T ~= 25% Forward 0.86[CH] 34 BBa_B1006 Terminator (artificial, large, % T ~> 90) Forward 0.99[CH] 39 BBa_B1010 Terminator (artificial, large, % T ~< 10) Forward 0.95[CH] 40 BBa_I11013 Modification of biobricks part BBa_B0015 129 BBa_I51003 -- No description -- 110 BBa_J61048 [rnpB-T1] Terminator Forward 0.98[JCA] 113

(152) TABLE-US-00056 TABLE 55 Examples of Bidirectional Terminators Efficiency Name Description Direction Fwd. Rev. Length BBa_B0011 LuxICDABEG (+/) Bidirectional 0.419[CC]/0.95[JK] 0.636[CC]/0.86[JK] 46 BBa_B0014 double terminator Bidirectional 0.604[CC]/0.96[JK] 0.86[JK] 95 (B0012-B0011) BBa_B0021 LuxICDABEG (+/), Bidirectional 0.636[CC]/0.86[JK] 0.419[CC]/0.95[JK] 46 reversed BBa_B0024 double terminator Bidirectional 0.86[JK] 0.604[CC]/0.96[JK] 95 (B0012-B0011), reversed BBa_B0050 Terminator Bidirectional 33 (pBR322, +/) BBa_B0051 Terminator Bidirectional 35 (yciA/tonA, +/) BBa_B1001 Terminator Bidirectional 0.81[CH] 34 (artificial, small, % T ~= 90) BBa_B1007 Terminator Bidirectional 0.83[CH] 40 (artificial, large, % T ~= 80) BBa_B1008 Terminator Bidirectional 40 (artificial, large ,% T ~= 70) BBa_B1009 Terminator Bidirectional 40 (artificial, large, % T ~= 40%) BBa_K259006 GFP-Terminator Bidirectional 0.604[CC]/0.96[JK] 0.86[JK] 823

(153) TABLE-US-00057 TABLE 56 Examples of Reverse Terminators Efficiency Name Description Direction Fwd. Rev. Length BBa_B0020 Terminator (Reverse Reverse 82 B0010) BBa_B0022 TE from coliphageT7, Reverse 0.368[CC] 0.309[CC] 41 reversed BBa_B0023 TE from coliphage Reverse 1.06[CC] 0.6[CC] 47 T7, reversed BBa_B0025 double terminator Reverse 0.295[CC]/0.62[JK] 0.984[CC]/0.97[JK] 129 (B0015), reversed BBa_B0052 Terminator (rrnC) Forward 41 BBa_B0060 Terminator (Reverse Bidirectional 33 B0050) BBa_B0061 Terminator (Reverse Bidirectional 35 B0051) BBa_B0063 Terminator (Reverse Reverse 72 B0053)

(154) TABLE-US-00058 TABLE 57 Examples of Yeast Terminators Efficiency Name Description Direction Fwd. Rev. Length BBa_J63002 ADH1 terminator Forward 225 from S. cerevisiae BBa_K110012 STE2 terminator Forward 123 BBa_Y1015 CycE1 252

(155) TABLE-US-00059 TABLE 58 Examples of Eukaryotic Terminators Efficiency Name Description Direction Fwd. Rev. Chassis Length BBa_J52016 eukaryotic -- derived from SV40 Forward 238 early poly A signal sequence BBa_J63002 ADH1 terminator from Forward 225 S. cerevisiae BBa_K110012 STE2 terminator Forward 123 BBa_Y1015 CycE1 252
Degradation Tags

(156) In some embodiments, a nucleic sequence encoding a protein degradation tag is added to the modules and engineered genetic counters in order to enhance protein degradation of a protein, such as a recombinase. As defined herein, a degradation tag is a genetic addition to the end of a nucleic acid sequence that modifies the protein that is expressed from that sequence such that the protein undergoes faster degradation by cellular degradation mechanisms. Thus, such protein degradation tags mark a protein for degradation, thus decreasing a protein's half-life.

(157) One of the useful aspects of degradation tags is the ability to detect and regulate gene activity in a time-sensitive manner. Such protein degradation tags can operate through the use of protein-degrading enzymes, such as proteases, within the cell. In some embodiments, the tags encode for a sequence of about eleven amino acids at the C-terminus of a protein, wherein said sequence is normally generated in E. coli when a ribosome gets stuck on a broken (truncated) mRNA. Without a normal termination codon, the ribosome can't detach from the defective mRNA. A special type of RNA known as ssrA (small stable RNA A) or tmRNA (transfer-messenger RNA) rescues the ribosome by adding the degradation tag followed by a stop codon. This allows the ribosome to break free and continue functioning. The tagged, incomplete protein can get degraded by the proteases ClpXP or ClpAP. Although the initial discovery of the number of amino acids encoding for an ssRA/tmRNA tag was eleven, the efficacy of mutating the last three amino acids of that system has been tested. Thus, the tags AAV, ASV, LVA, and LAA are classified by only three amino acids.

(158) In some embodiments, the protein degradation tag is an ssrA tag. In some embodiments, the ssrA tag comprises a sequence that is selected from the group consisting of sequences that encode for the peptides RPAANDENYALAA (SEQ ID NO: 995), RPAANDENYALVA (SEQ ID NO: 996), RPAANDENYAAAV (SEQ ID NO: 997), and RPAANDENYAASV (SEQ ID NO: 998).

(159) In some embodiments, the protein degradation tag is an LAA variant comprising the sequence GCAGCAAACGACGAAAACTACGCTTTAGCAGCTTAA (SEQ ID NO: 999). In one embodiment, the protein degradation tag is an AAV variant comprising the sequence GCAGCAAACGACGAAAACTACGCTGCAGCAGTTTAA (SEQ ID NO: 1000). In some embodiments, the protein degradation tag is an ASV variant comprising the sequence GCAGCAAACGACGAAAACTACGCTGCATCAGTTTAA (SEQ ID NO: 1001).

(160) Output Product Sequences and Output Products

(161) A variety of biological output gene and output product nucleic acid sequences are provided for use in the various modules and engineered genetic counters described herein. The biological outputs, or output gene products, as described herein, refer to gene products that can are used as markers of specific states of the modules and engineered genetic counters described herein. An output gene can encode for a protein or RNA that is used to track or mark the state of the cell upon receiving a particular input. Such output gene products can be used to distinguish between various states of a cell. Representative output products for the engineered genetic counters described herein include, but are not limited to, reporter proteins, transcriptional repressors, transcriptional activators, selection markers, enzymes, receptor proteins, ligand proteins, RNAs, riboswitches or short-hairpin RNAs.

(162) Reporter Outputs

(163) In some embodiments of the aspects described herein, the output gene products are reporters. As defined herein, reporters are proteins that can be used to measure gene expression and generally produce a measurable signal such as fluorescence, color, or luminescence. Reporter protein coding sequences encode proteins whose presence in the cell or organism is readily observed. For example, fluorescent proteins cause a cell to fluoresce when excited with light of a particular wavelength, luciferases cause a cell to catalyze a reaction that produces light, and enzymes such as -galactosidase convert a substrate to a colored product. In some embodiments, reporters are used to quantify the strength or activity of the signal received by the modules or biological converter switches of the invention. In some embodiments, reporters can be fused in-frame to other protein coding sequences to identify where a protein is located in a cell or organism.

(164) There are several different ways to measure or quantify a reporter depending on the particular reporter and what kind of characterization data is desired. In some embodiments, microscopy can be a useful technique for obtaining both spatial and temporal information on reporter activity, particularly at the single cell level. In other embodiments, flow cytometers can be used for measuring the distribution in reporter activity across a large population of cells. In some embodiments, plate readers may be used for taking population average measurements of many different samples over time. In other embodiments, instruments that combine such various functions, can be used, such as multiplex plate readers designed for flow cytometers, and combination microscopy and flow cytometric instruments.

(165) Fluorescent proteins are convenient ways to visualize or quantify the output of a module or engineered genetic counter. Fluorescence can be readily quantified using a microscope, plate reader or flow cytometer equipped to excite the fluorescent protein with the appropriate wavelength of light. Since several different fluorescent proteins are available, multiple gene expression measurements can be made in parallel. Non-limiting examples of fluorescent proteins useful for the engineered genetic counters described herein are provided in Table 59.

(166) TABLE-US-00060 TABLE 59 Examples of Fluorescent Protein Reporters Name Protein Description Tag Emission Excitation Length BBa_E0030 EYFP enhanced yellow fluorescent None 527 514 723 protein derived from A. victoria GFP BBa_E0020 ECFP engineered cyan fluorescent None 476 439 723 protein derived from A. victoria GFP BBa_E1010 mRFP1 **highly** engineered mutant of None 607 584 681 red fluorescent protein from Discosoma striata (coral) BBa_E2050 mOrange derivative of mRFP1, yeast- None 562 548 744 optimized BBa_E0040 GFPmut3b green fluorescent protein derived None 511 501 720 from jellyfish Aequeora victoria wild-type GFP (SwissProt: P42212 BBa_J52021 dnTraf6-linker-GFP 1446 BBa_J52026 dnMyD88-linker-GFP 1155 BBa_I715022 Amino Portion of RFP 462 BBa_I715023 Carboxyl portion of RFP 220 BBa_I712028 CherryNLS - synthetic construct 733 monomeric red fluorescent protein with nuclear localization sequence BBa_K125500 GFP fusion brick 718 BBa_K106000 GFP, AarI BD part 714 BBa_K106004 mCherry, Aar1 AB part 708 BBa_K106005 mCherry, Aar1 BD part 708 BBa_K106028 GFP, Aar1 AB part 714 BBa_K165005 Venus YFP, yeast optimized for 744 fusion BBa_K157005 Split-Cerulean-cCFP 261 BBa_K157006 Split-Cerulean-nCFP 483 BBa_K157007 Split-Venus-cYFP 261 BBa_K157008 Split-Venus-nYFP 486 BBa_K125810 slr2016 signal sequence + GFP 779 fusion for secretion of GFP BBa_K082003 GFP GFP(+LVA) 756 BBa_K156009 OFP (orange fluorescent protein) 864 BBa_K156010 SBFP2 (strongly enhanced blue 720 fluorescent protein) BBa_K106671 GFP, Aar1 AD part 714 BBa_K294055 GFPmut3b GFP RFP Hybrid None 511 501 720 BBa_K192001 CFP + tgt + lva 858 BBa_K180001 GFPmut3b Green fluorescent protein (+LVA) LVA 754 BBa_K283005 lpp_ompA_eGFP_streptavidin 1533 BBa_K180008 mCherry mCherry (rights owned by 708 Clontech) BBa_K180009 mBanana mBanana (rights owned by 708 Clontech)

(167) Luminescence can be readily quantified using a plate reader or luminescence counter. Luciferases can be used as output gene products for various embodiments of the invention, for example, measuring low levels of gene expression, because cells tend to have little to no background luminescence in the absence of a luciferase. Non-limiting examples of luciferases are provided in Table 60.

(168) TABLE-US-00061 TABLE 60 Examples of Luciferases Name Description Length BBa_J52011 dnMyD88-linker-Rluc 1371 BBa_J52013 dnMyD88-linker-Rluc-linker-PEST191 1872 BBa_I712019 Firefly luciferase - 1653 luciferase from Photinus pyralis

(169) In other embodiments, enzymes that produce colored substrates can be quantified using spectrophotometers or other instruments that can take absorbance measurements including plate readers. Like luciferases, enzymes like -galactosidase can be used for measuring low levels of gene expression because they tend to amplify low signals.

(170) TABLE-US-00062 TABLE 61 Examples of Enzymes that Produce Colored Substrates Name Protein Description Length BBa_I732006 lacZ alpha fragment 234 BBa_I732005 lacZ (encoding beta- 3075 galactosidase, full-length) BBa_K147002 xylE 924

(171) Another reporter gene output product for use in the different aspects described herein include:

(172) TABLE-US-00063 TABLE 62 Examples of Other Reporter Genes Name Protein Description Length BBa_K157004 Fluoresceine-A-binding 522
Transcriptional Outputs:

(173) In some embodiments of the different aspects described herein, the output gene product of a given module or engineered genetic counter is itself a transcriptional activator or repressor, the production of which by an output gene can result in a further change in state of the cell, and provide additional input signals to subsequent or additional modules or engineered genetic counters. Transcriptional regulators either activate or repress transcription from cognate promoters. Transcriptional activators typically bind nearby to transcriptional promoters and recruit RNA polymerase to directly initiate transcription. Repressors bind to transcriptional promoters and sterically hinder transcriptional initiation by RNA polymerase. Other transcriptional regulators serve as either an activator or a repressor depending on where it binds and cellular conditions. Examples of transcriptional regulators as output gene products are provided in Table 63.

(174) TABLE-US-00064 TABLE 63 Examples of Transcriptional Regulators Name Protein Description Tag Direction Uniprot Length BBa_C0079 lasR- lasR activator from P. aeruginosa LVA Forward P25084 756 LVA PAO1(+LVA) BBa_C0077 cinR cinR activator from Rhizobium LVA Forward ~Q84HT2 762 leguminosarum (+LVA) BBa_C0179 lasR lasR activator from P. aeruginosa None Forward P25084 723 PAO1(no LVA) BBa_J07009 ToxR toxicity-gene activator from Vibrio None Forward P15795 630 cholerae BBa_K118001 appY coding sequence encoding a 753 DNA-binding transcriptional activator BBa_K137113 rcsA 624 BBa_K131022 LuxO D47E, Vibrio harveyi 1362 BBa_K131023 LuxO D47A, Vibrio harveyi 1362 BBa_K082006 LuxR-G2F 753 BBa_K294205 This is a coding sequence of heat 402 shock protein from E. coli BBa_S04301 lasR- C0079: B0015 LVA Forward P25084 918 LVA BBa_K266002 lasR- LasR + Term LVA Forward P25084 918 LVA BBa_C0012 LacI lacI repressor from E. coli (+LVA) LVA Forward P03023 1128 BBa_C0040 TetR tetracycline repressor from LVA Forward P04483 660 transposon Tn10 (+LVA) BBa_C0050 CI cI repressor from phage HK022 LVA Forward P18680 744 HK022 (+LVA?) BBa_C0051 CI cI repressor from E. coli phage LVA Forward P03034 750 lambda lambda (+LVA) BBa_C0052 CI 434- cI repressor from phage 434 (+LVA) LVA Forward P16117 669 LVA BBa_C0053 C2 P22 c2 repressor from Salmonella phage LVA Forward P69202 687 P22 (+LVA) BBa_C0073 mnt- mnt repressor (weak) from LVA Forward P03049 288 weak Salmonella phage P22 (+LVA) BBa_C0075 cI TP901 cI repressor from phage LVA Forward none 579 TP901 TP901-1 (+LVA) BBa_C0074 penI penI repressor from Bacillus LVA Forward P06555 423 licheniformis (+LVA) BBa_C0072 mnt mnt repressor (strong) from LVA Forward P03049 288 Salmonella phage P22 (+LVA) BBa_C2001 Zif23- Zif23-GCN4 engineered repressor LVA Forward P03069 300 GCN4 (+LVA, C2000 codon-optimized for E. coli) BBa_C0056 CI 434 cI repressor from phage 434 (no None Forward P16117 636 LVA) BBa_J06501 LacI- LacI repressor (temperature- LVA Forward ~P03023 1153 mut2 sensitive mut 265) (+LVA) BBa_J06500 LacI- LacI repressor (temperature- LVA Forward ~P03023 1153 mut1 sensitive mut 241) (+LVA) BBa_C2006 MalE.FactorXa.Zif268-GCN4 1428 BBa_I715032 lacIq reverse 1128 BBa_I732100 LacI 1086 BBa_I732101 LRLa 1086 BBa_I732105 ARL2A0101 1086 BBa_I732106 ARL2A0102 1086 BBa_I732107 ARL2A0103 1086 BBa_I732110 ARL2A0203 1086 BBa_I732112 ARL2A0301 1086 BBa_I732115 ARL4A0604 1086 BBa_K091001 LsrR gene Forward 954 BBa_K091121 LacI wild-type gene 1083 BBa_K091122 LacI_I12 protein 1083 BBa_K143033 LacI (Lva.sup., N-terminal deletion) 1086 regulatory protein BBa_K142000 lacI IS mutant (IPTG unresponsive) 1128 R197A BBa_K142001 lacI IS mutant (IPTG unresponsive) 1128 R197F BBa_K142002 lacI IS mutant (IPTG unresponsive) 1128 T276A BBa_K142003 lacI IS mutant (IPTG unresponsive) 1128 T276F BBa_K106666 Lac Repressor, AarI AB part 1104 BBa_K106667 Lac Repressor, AarI BD part 1107 BBa_K142004 lacI IS mutant (IPTG unresponsive) 1128 R197A T276A BBa_K106668 Tet Repressor, AarI AB part 618 BBa_K106669 Tet Repressor, AarI BD part 621 BBa_K142005 lacI IS mutant (IPTG unresponsive) 1128 R197A T276F BBa_K142006 lacI IS mutant (IPTG unresponsive) 1128 R197F T276A BBa_K142007 lacI IS mutant (IPTG unresponsive) 1128 R197F T276F BBa_K082004 LacI LacI- wild type 1083 BBa_K082005 LacI LacI-Mutant 1083 BBa_C0062 LuxR luxR repressor/activator, (no LVA?) None Forward P12746 756 BBa_C0071 rhlR- rhlR repressor/activator from P. LVA Forward P54292 762 LVA aeruginosa PA3477 (+LVA) BBa_C0080 araC araC arabinose operon regulatory LVA Forward P0A9E0 915 protein (repressor/activator) from E. coli (+LVA) BBa_C0171 rhIR rhlR repressor/activator from P. None Forward P54292 729 aeruginosa PA3477 (no LVA) BBa_K108021 Fis 297
Selection Markers

(175) In other embodiments of the various aspects described herein, genes encoding selection markers are used as output genes. Selection markers, as defined herein, are protein coding sequences that confer a selective advantage or disadvantage to a biological unit, such as a cell. For example, a common type of prokaryotic selection marker is one that confers resistance to a particular antibiotic. Thus, cells that carry the selection marker can grow in media despite the presence of antibiotic. For example, most plasmids contain antibiotic selection markers so that it is ensured that the plasmid is maintained during cell replication and division, as cells that lose a copy of the plasmid will soon either die or fail to grow in media supplemented with antibiotic. A second common type of selection marker, often termed a positive selection marker, are those that are toxic to the cell. Positive selection markers are frequently used during cloning to select against cells transformed with the cloning vector and ensure that only cells transformed with a plasmid containing the insert. Examples of output genes encoding selection markers are provided in Table 64.

(176) TABLE-US-00065 TABLE 64 Examples of Selection Markers Name Protein Description Tag Direction UniProt KEGG Length BBa_T9150 PyrF orotidine 5 None Forward P08244 eco: b1281; 741 BBa_J31002 AadA- kanamycin resistance P0AG05 none 816 bkw backwards (KanB) [cf. BBa_J23012 & BBa_J31003] BBa_J31003 AadA2 kanamycin resistance P0AG05 none 816 forward (KanF) [cf. BBa_J23012 & BBa_J31002] BBa_J31004 CAT- chloramphenicol P62577 none 660 bkw acetyltransferase (backwards, CmB) [cf. BBa_J31005] BBa_J31006 TetA(C)- tetracycline resistance P02981 1191 bkw protein TetA(C) (backwards) [cf. BBa_J31007] BBa_J31005 CAT chloramphenicol P62577 none 660 acetyltransferase (forwards, CmF) [cf. BBa_J31004] BBa_J31007 TetA(C) tetracycline resistance P02981 1191 protein TetA(C) (forward), [cf. BBa_J31006] BBa_K145151 ccdB coding region 306 BBa_K143031 Aad9 Spectinomycin 771 Resistance Gene BBa_K156011 aadA (streptomycin 3- 789 adenyltransferase)
Enzyme Outputs

(177) An output gene sequence can encode an enzyme for use in different embodiments the modules and engineered genetic counters described herein. In some embodiments, an enzyme output is used as a response to a particular input. For example, in response to a particular number of inputs received by one or more engineered genetic counters described herein, such as a certain range of toxin concentration present in the environment, the engineered genetic counter may turn on a modular component that encodes as an output gene product an enzyme that can degrade or otherwise destroy the toxin.

(178) In some embodiments, output gene sequences encode biosynthetic enzymes that catalyze the conversion of substrates to products. For example, such biosynthetic enzymes can be combined together along with or within the modules and engineered genetic counters of the invention to construct pathways that produce or degrade useful chemicals and materials, in response to specific signals. These combinations of enzymes can reconstitute either natural or synthetic biosynthetic pathways. These enzymes have applications in specialty chemicals, biofuels, and bioremediation. Descriptions of enzymes useful for the modules and engineered genetic counters of the invention are described herein.

(179) N-Acyl Homoserine lactones (AHLs or N-AHLs) are a class of signaling molecules involved in bacterial quorum sensing. Quorum sensing is a method of communication between bacteria that enables the coordination of group based behavior based on population density. In synthetic biology, genetic parts derived from quorum sensing systems have been used to create patterns on a lawn of bacteria and to achieve synchronized cell behavior. AHL can diffuse across cell membranes and is stable in growth media over a range of pH values. AHL can bind to transcriptional activators such as LuxR and stimulate transcription from cognate promoters. Several similar quorum sensing systems exists across different bacterial species; thus, there are several known enzymes that synthesize or degrade different AHL molecules that can be used for the modules and engineered genetic counters of the invention.

(180) TABLE-US-00066 TABLE 65 Examples of AHLs Name Protein Description Direction Uniprot KEGG E.C. Length BBa_C0061 luxI- autoinducer Forward P12747 none none 618 LVA synthetase for AHL BBa_C0060 aiiA- autoinducer Forward Q1WNZ5 none 3.1.1. 789 LVA inactivation enzyme from Bacillus; hydrolyzes acetyl homoserine lactone BBa_C0070 rhlI- autoinducer Forward Q02QW5 none none 642 LVA synthetase for N- butyryl-HSL (BHL) and HHL BBa_C0076 cinI autoinducer Forward Q1MDW1 none none 702 synthetase BBa_C0078 lasI autoinducer Forward P33883 pae: PA1432 none 642 synthetase for PAI from Pseudomonas aeruginosa BBa_C0161 luxI autoinducer Forward P12747 none none 585 synthetase for AHL (no LVA) BBa_C0170 rhII autoinducer Forward Q02QW5 none none 609 synthetase for N- butyryl-HSL (BHL) and HHL (no LVA) BBa_C0178 lasI autoinducer Forward P33883 pae: PA1432 none 609 synthetase for PAI from Pseudomonas aeruginosa (no LVA) BBa_K091109 LuxS 516 BBa_C0060 aiiA- autoinducer Forward Q1WNZ5 none 3.1.1. 789 LVA inactivation enzyme from Bacillus; hydrolyzes acetyl homoserine lactone BBa_C0160 aiiA autoinducer Forward Q1WNZ5 none 3.1.1. 756 inactivation enzyme aiiA (no LVA)

(181) Isoprenoids, also known as terpenoids, are a large and highly diverse class of natural organic chemicals with many functions in plant primary and secondary metabolism. Most are multicyclic structures that differ from one another not only in functional groups but also in their basic carbon skeletons. Isoprenoids are synthesized from common prenyl diphosphate precursors through the action of terpene synthases and terpene-modifying enzymes such as cytochrome P450 monooxygenases. Plant terpenoids are used extensively for their aromatic qualities. They play a role in traditional herbal remedies and are under investigation for antibacterial, antineoplastic, and other pharmaceutical functions. Much effort has been directed toward their production in microbial hosts.

(182) There are two primary pathways for making isoprenoids: the mevalonate pathway and the non-mevalonate pathway.

(183) TABLE-US-00067 TABLE 66 Examples of Isoprenoids Name Description Length BBa_K118000 dxs coding sequence encoding 1866 1-deoxyxylulose-5-phosphate synthase BBa_K115050 A-coA > AA-coA 1188 BBa_K115056 IPP > OPP or DMAPP > OPP 552 BBa_K115057 OPP > FPP 903 BBa_K118002 crtB coding sequence encoding 933 phytoene synthase BBa_K118003 crtI coding sequence encoding 1482 phytoene dehydrogenase BBa_K118008 crtY coding sequence encoding 1152 lycopene B-cyclase

(184) Odorants are volatile compounds that have an aroma detectable by the olfactory system. Odorant enzymes convert a substrate to an odorant product. Exemplary odorant enzymes are described in Table 67.

(185) TABLE-US-00068 TABLE 67 Examples of Odorant Enzymes Name Protein Description Uniprot KEGG E.C. Length BBa_J45001 SAMT SAM: salicylic acid carboxyl Q8H6N2 none none 1155 methyltransferase; converts salicylic acid to methyl salicylate (winter BBa_J45002 BAMT SAM: benzoic acid carboxyl Q9FYZ9 none 2.1.1. 1098 methyltransferase; converts benzoic acid to methyl benzoate (floral odor) BBa_J45004 BSMT1 SAM: benzoic acid/salicylic Q84UB5 none none 1074 acid carboxyl methyltransferase I; converts salicylic acid to methyl sali BBa_J45008 BAT2 branched-chain amino acid P47176 sce: YJR148W 2.6.1.42 1134 transaminase (BAT2); converts leucine to alpha- ketoisocaproate BBa_J45014 ATF1-1148 alcohol acetyltransferase I; P40353 sce: YOR377W 2.3.1.84 1581 mutant converts isoamyl alcohol to isoamyl acetate (banana odor) BBa_J45017 PchA & isochorismate pyruvate-lyase 1736 PchB and isochorismate synthase (pchBA); converts chorismate to salicylate BBa_I742107 COMT 1101

(186) The following are exemplary enzymes involved in the biosynthesis of plastic, specifically polyhydroxybutyrate.

(187) TABLE-US-00069 TABLE 68 Examples of Plastic Biosynthesis Enzymes Name Description Length BBa_K125504 phaE BioPlastic polyhydroxybutyrate 996 synthesis pathway (origin PCC6803 slr1829) BBa_K125501 phaA BioPlastic polyhydroxybutyrate 1233 synthesis pathway (origin PCC6803 slr1994) BBa_K125502 phaB BioPlastic polyhydroxybutyrate 726 synthesis pathway (origin PCC6803 slr1993) BBa_K125503 phaC BioPlastic polyhydroxybutyrate 1140 synthesis pathway (origin PCC6803 slr1830) BBa_K156012 phaA (acetyl-CoA acetyltransferase) 1182 BBa_K156013 phaB1 (acetyacetyl-CoA reductase) 741 BBa_K156014 phaC1 (Poly(3-hydroxybutyrate)polymerase)

(188) The following are exemplary enzymes involved in the biosynthesis of butanol and butanol metabolism.

(189) TABLE-US-00070 TABLE 69 Examples of Butanol Biosynthesis Enzymes Name Description Length BBa_I725011 B-hydroxy butyryl coA dehydrogenase 870 BBa_I72512 Enoyl-coa hydratase 801 BBa_I725013 Butyryl CoA dehyrogenase 1155 BBa_I725014 Butyraldehyde dehydrogenase 2598 BBa_I725015 Butanol dehydrogenase 1188

(190) Bisphenol A is a toxin that has been shown to leech from certain types of plastic. Studies have shown this chemical to have detrimental effects in animal studies and is very likely to be harmful to humans as well. The following exemplary bisphenol A degradation protein coding sequences are from Sphingomonas bisphenolicum and may aid in the remediation of bisphenol A contamination.

(191) TABLE-US-00071 TABLE 70 Examples of Bisphenol A Biosynthesis Enzymes Name Description Length BBa_K123001 BisdB 1284 BBa_K123000 BisdA 330

(192) Other miscellaneous enzymes for use in the invention are provided in Table 71.

(193) TABLE-US-00072 TABLE 71 Examples of Miscellaneous Biosynthetic Enzymes Name Description Direction Uniprot KEGG E.C. Length BBa_K118022 cex coding sequence encoding 1461 Cellulomonas fimi exoglucanase BBa_K118023 cenA coding sequence 1353 encoding Cellulomonas fimi endoglucanase A BBa_K118028 beta-glucosidase gene bglX 2280 (chu_2268) from Cytophaga hutchinsonii BBa_C0083 aspartate ammonia-lyase Forward P0AC38 eco: b4139 4.3.1.1 1518 BBa_I15008 heme oxygenase (ho1) from Forward P72849 syn: sll1184 1.14.99.3 726 Synechocystis BBa_I15009 phycocyanobilin: ferredoxin Forward Q55891 syn: slr0116 1.3.7.5 750 oxidoreductase (PcyA) from synechocystis BBa_T9150 orotidine 5 Forward P08244 eco: b1281; 4.1.1.23 741 BBa_I716153 hemB 975 BBa_I716154 hemC 942 BBa_I716155 hemD 741 BBa_I716152 hemA (from CFT703) 1257 BBa_I742141 sam5 (coumarate 1542 hydroxylase) coding sequence BBa_I742142 sam8 (tyrosine-ammonia 1536 lyase) coding sequence BBa_I723024 PhzM 1019 BBa_I723025 PhzS 1210 BBa_K137005 pabA (from pABA synthesis) 585 BBa_K137006 pabB (from pABA synthesis) 1890 BBa_K137009 folB (dihydroneopterin 354 aldolase) BBa_K137011 folKE (GTP Cyclohydrolase I + 1053 pyrophosphokinase) BBa_K137017 Galactose Oxidase 1926 BBa_K118015 glgC coding sequence 1299 encoding ADP-glucose pyrophosphorylase BBa_K118016 glgC16 (glgC with G336D 1299 substitution) BBa_K123001 BisdB 1284 BBa_K108018 PhbAB 1997 BBa_K108026 XylA 1053 BBa_K108027 XylM 1110 BBa_K108028 XylB 1101 BBa_K108029 XylS 966 BBa_K147003 ohbA 531 BBa_K123000 BisdA 330 BBa_K284999 Deletar este 1431 BBa_I716253 HPI, katG 2181 BBa_K137000 katE 2265 BBa_K137014 katE + LAA 2298 BBa_K137067 katG 2184 BBa_K078102 dxnB 886 BBa_K078003 one part of the initial 1897 dioxygenase of the dioxin degradation pathway

(194) Other enzymes of use in the modules and engineered genetic counters of the invention include enzymes that phosphorylate or dephosphorylate either small molecules or other proteins, and enzymes that methylate or demethylate other proteins or DNA.

(195) TABLE-US-00073 TABLE 72 Examples of Phosphorylation and Methylation-Related Enzymes Name Protein Description Direction Uniprot KEGG E.C. Length BBa_C0082 tar- Receptor, tar-envZ Forward 1491 envZ BBa_J58104 Fusion protein Trg-EnvZ 1485 for signal transduction BBa_J58105 Synthetic periplasmic 891 binding protein that docks a vanillin molecule BBa_I752001 CheZ coding sequence 639 (Chemotaxis protein) BBa_K091002 LsrK gene Forward 1593 BBa_K147000 cheZ 835 BBa_K118015 glgC coding sequence 1299 encoding ADP-glucose pyrophosphorylase BBa_K118016 glgC16 (glgC with 1299 G336D substitution) BBa_K094100 cheZ gene 695 BBa_K136046 envZ* 1353 BBa_K283008 chez chez_Histag 713 BBa_C0024 CheB CheB chemotaxis coding Forward P07330 JW1872 3.1.1.61 1053 sequence (protein glutamate methylesterase) BBa_K108020 Dam 837

(196) Also useful as output gene products for the purposes of the invention are receptors, ligands, and lytic proteins. Receptors tend to have three domains: an extracellular domain for binding ligands such as proteins, peptides or small molecules, a transmembrane domain, and an intracellular or cytoplasmic domain which frequently can participate in some sort of signal transduction event such as phosphorylation. In some embodiments, transporter, channel, or pump gene sequences are used as output genes. Transporters are membrane proteins responsible for transport of substances across the cell membrane. Channels are made up of proteins that form transmembrane pores through which selected ions can diffuse. Pumps are membrane proteins that can move substances against their gradients in an energy-dependent process known as active transport. In some embodiments, nucleic acid sequences encoding proteins and protein domains whose primary purpose is to bind other proteins, ions, small molecules, and other ligands are used. Exemplary receptors, ligands, and lytic proteins are listed in Table 73.

(197) TABLE-US-00074 TABLE 73 Examples of Receptors, Ligands, and Lytic Proteins Name Protein Description Tag Direction UniProt Length BBa_J07009 ToxR toxicity-gene activator from None Forward P15795 630 Vibrio cholerae BBa_K133063 (TIR)TLR3 453 BBa_K133064 (TIR)TLR9 585 BBa_K133065 (TMTIR)TLR3 600 BBa_K133069 (TMTIR)TLR3stop 603 BBa_K133067 (TMTIR)TLR4 621 BBa_K133060 (TMTIR)TLR9 645 BBa_K209400 AarI B-C part, hM4D 1434 BBa_K209401 AarI B-C part, Rs1.3 1407 BBa_I712002 CCR5 1059 BBa_I712003 CCR5-NUb 1194 BBa_I712010 CD4 sequence without signal 1299 peptide BBa_I712017 Chemokine (CXC motif) receptor 4, 1191 fused to N-terminal half of ubiquitin. BBa_I15010 Cph8 cph8 (Cph1/EnvZ fusion) None Forward 2238 BBa_I728500 CPX Terminal Surface Display 654 Protein with Polystyrene-Binding Peptide BBa_J52035 dnMyD88 420 BBa_K259000 fhuA - Outer membrane transporter 2247 for ferrichrome-iron BBa_K259001 fiu B Outer Membrane Ferric Iron 2247 Transporter BBa_J58104 Fusion protein Trg-EnvZ for signal 1485 transduction BBa_K137112 lamB 1339 BBa_C0082 tar- Receptor, tar-envZ LVA Forward 1491 envZ BBa_J58105 Synthetic periplasmic binding 891 protein that docks a vanillin molecule BBa_I712012 TIR domain of TLR3 456 BBa_K143037 YtvA Blue Light Receptor for 789 B. subtilis BBa_J07006 malE 1191 BBa_J07017 FecA protein 2325 BBa_K141000 UCP1 Ucp1 924 BBa_K141002 Ucp 175 deleted 921 BBa_K141003 Ucp 76 deleted 921 BBa_K190028 GlpF 846 BBa_I746200 FepA L8T Mutant - Large Diffusion 2208 pore for E. coli outer membrane. BBa_I765002 ExbB membrane spanning protein in 735 TonB-ExbB-ExbD complex [Escherichia coli K12] BBa_I765003 TonB ferric siderophore transport 735 system, periplasmic binding protein TonB [Pseudomonas entomophila BBa_K090000 Glutamate gated K+ channel 1194 BBa_K284000 Lactate Permease from 1873 Kluyveromyces lactis BBa_K284997 Deletar este 1069 BBa_J22101 Lac Y gene 1288 BBa_K079015 LacY transporter protein from E. 1254 coli BBa_K119003 RcnA (YohM) 833 BBa_K137001 LacY 1254 BBa_I712024 CD4 1374 BBa_K133061 CD4 ecto 1113 BBa_K136046 envZ* 1353 BBa_K157002 Transmembrane region of the EGF- 87 Receptor (ErbB-1) BBa_K227006 puc BA coding region of R. forward 336 sphaeroides BBa_M12067 E1 264 BBa_I721002 Lead Binding Protein 399 BBa_K126000 TE33 Fab L chain 648 BBa_K133070 gyrEC 660 BBa_K133062 gyrHP 660 BBa_K157003 Anti-NIP singlechain Fv-Fragment 753 BBa_K211001 RI7 987 BBa_K211002 RI7-odr10 chimeric GPCR 1062 BBa_K103004 protein Z.sub.SPA-1 190 BBa_K128003 p1025 101 BBa_K133059 RGD 9 BBa_K283010 Streptavidin 387 BBa_K103004 protein Z.sub.SPA-1 190 BBa_K128003 p1025 101 BBa_K133059 RGD 9 BBa_K283010 Streptavidin 387 BBa_K112000 Holin T4 holin, complete CDS, berkeley 657 standard BBa_K112002 Holin T4 holin, without stop codon, 654 berkeley standard BBa_K112004 a~T4 holin in BBb 661 BBa_K112006 T4 antiholin in BBb 294 BBa_K112009 in BBb 288 BBa_K112010 a~T4 antiholin in BBb 298 BBa_K112012 T4 lysozyme in BBb 495 BBa_K112015 in BBb 489 BBa_K112016 a~T4 lysozyme in BBb 499 BBa_K117000 Lysis gene (promotes lysis in 144 colicin-producing bacteria strain) BBa_K124014 Bacteriophage Holin Gene pS105 317 BBa_K108001 SRRz 1242 BBa_K112300 {lambda lysozyme} in BBb format 477 BBa_K112304 {a~lambda lysozyme} in BBb 481 format BBa_K112306 {lambda holin} in BBb format 318 BBa_K112310 {a~lambda holin}; adheres to 322 Berkeley standard BBa_K112312 {lambda antiholin}; adheres to 324 Berkeley standard BBa_K112316 {a~lambda antiholin}; adheres to 328 Berkeley standard BBa_K124017 Bacteriophage Lysis Cassette S105, 1257 R, and Rz BBa_K112806 [T4 endolysin] 514 BBa_K284001 Lysozyme from Gallus gallus 539
Single Invertase Memory Modules

(198) In some aspects, different components, such as promoters, promoter activators promoter repressors, recombinases, and output gene products, are provided to create novel biological modules to be used in the engineered genetic counters described herein. The ability to create and modulate various combinations of the different components and modules provides flexibility in the designs and uses of the engineered genetic counters described herein.

(199) One exemplary module for use in the engineered genetic counters described herein is the single invertase memory module. As defined herein, a single invertase memory module (SIMM), is a stable, switchable bit of memory that uses recombinases, such as Cre and flp.sub.e, which can invert DNA between two oppositely oriented cognate recombinase recognition sites. A unique feature and advantage of SIMMs, of relevance to their use in the engineered genetic counters described herein, is the lack of both leakiness and mixtures of inverted and non-inverted states that can be caused by expressing recombinases independently from their cognate recognition sites. Thus, the use of SIMMs in the engineered genetic counters described herein allows for the maintenance of memory, and provides the ability to count between discrete states by expressing the recombinases between their cognate recognition sites.

(200) A SIMM is a nucleic acid-based module comprising a recombinase sequence that is located between its cognate recombinase recognition sites, and downstream of an inverted inducible promoter sequence, i.e., RRS.sub.for-iP.sub.inv-RC-RRS.sub.rev, where RRS.sub.for is a forward recombinase recognition site, iP.sub.inv is an inverted promoter sequence, RC is a recombinase sequence and RRS.sub.rev is a reverse recombinase recognition. Upon recombinase expression following activation of an upstream promoter not present within the SIMM, the recombinase causes a single inversion of the DNA between the cognate recognition sites, including its own DNA sequence (i.e., RRS.sub.for-iP-RC.sub.inv-RRS.sub.rev). Any further transcription from the upstream promoter yields antisense RNA of the recombinase gene rather then sense RNA, and therefore no further recombinase protein is produced. Thus, the inversion event is discrete and stable, and does not result in a mixture of inverted and non-inverted states. Further, the inverted promoter is now in the proper orientation to drive transcription of components of downstream modules, such as another SIMM. Similarly, the upstream promoter driving expression of the SIMM can be a promoter within an upstream SIMM or another module.

(201) In some embodiments of the aspects described herein, a SIMM can use any recombinase for encoding memory, rather than only unidirectional recombinases, which can allow greater flexibility and practicality. In some embodiments, the recombinase is encoded between its cognate recombinase recognition sequences. In other embodiments, the recombinase is encoded outside of its cognate recombinase recognition sequences. In those embodiments where the recombinase is encoded outside of its cognate recombinase recognition sequences, the SIMM can be used as, for example, a waveform generator, such that the input or inputs that lead to recombinase expression results in constant inversion between the recombinase recognition sequences and is used to generate pulses of outputs. Such outputs can be any of the output gene products described herein. In some embodiments, the outputs can be a fluorescent protein.

(202) The recombinases and recombination recognition sequences for use in the SIMMs described herein can be selected from any known or variant (engineered) recombinase or recombinase recognition sequences, as determined by a skilled artisan. In some embodiments of the various aspects described herein, the recombinase is a Cre recombinase and the recombinase recognition sites are LoxP sites or variants thereof. Alternative site-specific recombinases include: 1) the Flp recombinase of the 2pi plasmid of Saccharomyces cerevisiae (Cox (1983) Proc. Natl. Acad. Sci. USA 80:4223) which recognize FRT sites and variants thereof; 2) the integrase of Streptomyces phage .PHI.C31 that carries out efficient recombination between the attP site of the phage genome and the attB site of the host chromosome (Groth et al., 2000 Proc. Natl. Acad. Sci. USA, 97: 5995); 3) the Int recombinase of bacteriophage lambda (lambda-int/attP) (with or without Xis) which recognizes att sites (Weisberg et al. In: Lambda II, supra, pp. 211-250); 4) the xerC and xerD recombinases of E. coli which together form a recombinase that recognizes the 28 bp dif site (Leslie and Sherratt (1995) EMBO J. 14:1561); 5) the Int protein from the conjugative transposon Tn916 (Lu and Churchward (1994) EMBO J. 13:1541); 6) TpnI and the -lactamase transposons (Levesque (1990) J. Bacteriol. 172:3745); 7) the Tn3 resolvase (Flanagan et al. (1989) J. Mol. Biol. 206:295 and Stark et al. (1989) Cell 58:779); 8) the SpoIVC recombinase of Bacillus subtilis (Sato et al. J. Bacteriol. 172:1092); 9) the Hin recombinase (Galsgow et al. (1989) J. Biol. Chem. 264:10072); 10) the Cin recombinase (Hafter et al. (1988) EMBO J. 7:3991); 11) the immunoglobulin recombinases (Malynn et al. Cell (1988) 54:453); and 12) the FIMB and FIME recombinases (Blomfield et al., 1997 Mol. Microbiol. 23:705). Additional non-limiting examples of recombinases and their cognate recombinase recognition sequences that are useful for the SIMMs and engineered genetic counters described herein are provided in Tables 1-10, and in SEQ ID NOs: 1-18.

(203) The inverted promoter sequence in a SIMM can be used to drive transcription of downstream components of that SIMM or other modules upon recombinase activation and inversion of the promoter to the forward direction. Accordingly, an inverted promoter sequence for use in the SIMMs described herein can be a constitutive or inducible promoter, depending upon the requirements of the engineered genetic counters. Non-limiting examples of such promoter sequences for use in the SIMMs described herein are provided in SEQ ID NOs: 33-39 and Tables 11-46.

(204) In other embodiments of the aspects described herein, one or more ribosome binding site sequences (RBSs) can also be added to a SIMM to promote efficient and accurate translation of the mRNA sequences for protein synthesis. RBSs are useful components for modulating the efficiency and rates of synthesis of the proteins encoded by the engineered genetic counters described herein. Non-limiting examples of such RBS sequences for use in the SIMMs described herein are provided in Tables 47-53. Accordingly, in some embodiments of these aspects, a SIMM further comprises a ribosome binding site upstream of the recombinase sequence, i.e., the SIMM comprises RRS.sub.for-iP.sub.inv-RBS-RC-RRS.sub.rev, where RBS is a ribosome binding site.

(205) In other embodiments of the aspects described herein, one or more terminator sequences can be added to a SIMM to prevent activation of downstream genes or modules by an upstream promoter. Terminator sequences can be added to the end of, for example, a recombinase sequence in a SIMM, to prevent further transcription downstream of the recombinase. Thus, terminator sequences are useful in the engineered genetic counters described herein to prevent unwanted transcription driven by activation of the various modules. Non-limiting examples of such terminator sequences for use in the SIMMs described herein are provided in Tables 54-58. Accordingly, in some embodiments of these aspects, a SIMM further comprises a transcriptional terminator sequence downstream of the recombinase sequence, i.e., RRS.sub.for-iP.sub.inv-RC-T-RRS.sub.rev, where T is a terminator sequence.

(206) Degradation tag sequences are also provided for use in the SIMMs and engineered genetic counters described herein to enhance degradation of a protein expressing the tag. The ability to add degradation tags to the proteins encoded by the SIMMs and engineered genetic counters described herein provides for additional layer of regulation and control of the modules. Non-limiting examples of such degradation tag sequences for use in the SIMMs described herein are provided in SEQ ID NOs: 995-1001. Accordingly, in some embodiments of the aspects described herein, a SIMM further comprises a protein degradation tag sequence downstream of the recombinase sequence, i.e., the SIMM comprises i.e., the SIMM comprises RRS.sub.for-iP.sub.inv-RC-D-RRS.sub.rev, where D is a degradation tag sequence.

(207) In further embodiments of these aspects, a SIMM comprises both a ribosome binding site upstream of the recombinase sequence and a protein degradation tag sequence downstream of the recombinase sequence, i.e., the SIMM comprises RRS.sub.for-iP.sub.invRBS-RC-D-RRS.sub.rev. In other embodiments of these aspects, a SIMM comprises a protein degradation tag sequence and a transcriptional terminator sequence downstream of the recombinase sequence, i.e., the SIMM comprises RRS.sub.for-iP.sub.inv-RC-D-T-RRS.sub.rev. In some embodiments of these aspects, a SIMM comprises a ribosome binding site upstream of the recombinase sequence and a terminator sequence downstream of the recombinase sequence, i.e., the SIMM comprises RRS.sub.for-iP.sub.inv-RBS-RC-T-RRS.sub.rev.

(208) In some particular embodiments of these aspects, a SIMM can further comprise a ribosome binding site upstream of the recombinase sequence, and protein degradation tag and transcriptional terminator sequences downstream of the recombinase sequence, i.e., RRS.sub.for-iP.sub.inv-RBS-RC-D-T-RRS.sub.rev. In such embodiments, the combined addition of an RBS, a transcriptional terminator sequence, and a degradation tag to the SIMM provides an enhanced ability to regulate and control expression of the recombinase encoded by the SIMM.

(209) In some embodiments of these aspects and all such aspects described herein, a SIMM can be designed so that it can be reset by placing an additional promoter sequence in an inverted orientation downstream of the reverse recombinase recognition site, i.e., RRS.sub.for-iP.sub.1,inv-RBS-RC-RRS.sub.rev-iP.sub.2,inv; where iP.sub.1,inv is a first inverted inducible promoter sequence and iP.sub.2,inv is a second inverted inducible promoter sequence. Upon activation of the reverse promoter, the state of such a SIMM is flipped from its inverted state back to its original state. In some embodiments, the same reverse inducible promoter can be used throughout the entire set of SIMMs within an engineered genetic counter, such that a single inducer can be used to perform a global reset of the memory system.

(210) Engineered Genetic Counters

(211) Described herein are engineered genetic counters that are extensible, highly modular and can function with a variety of combinations of various component parts and modules, such as inducible promoters, recombinases, output products, and SIMMs. The modular architecture of the counters described herein allows for tunable expression of a variety output products. Further, these counters can operate on a variety of time scales, including hours, and retain their state based on DNA orientation, due to the use of recombinases expressed within their cognate recognition sequences. Depending on the combinations of promoters used in the engineered genetic modules described herein, an engineered genetic counter can be used with a single inducer or with multiple inducers. Depending on the type of inducible promoters utilized, the engineered genetic circuits described herein can be used to enumerate physiological events and stimuli, such as activation of gene networks or exposure to nutrients, toxins, or metabolites.

(212) Accordingly, in some aspects, single inducer engineered genetic counters are provided. Single inducer counters can be used for counting multiple independent exposures to a single type of inducer, such as arabinose. Thus, such single inducer counters can be used to detect multiple exposures to a biological agent, such as a toxin. Such single inducer engineered genetic counters comprise an inducible promoter sequence (iP.sub.1), at least one SIMM, and an output nucleic acid sequence (OP). In such counters, the inverted promoter sequences of each SIMM and the inducible promoter sequence of the counter are the same promoter sequence. In some embodiments of the aspects described herein, the SIMM comprises a ribosome binding site upstream of a recombinase sequence, and protein degradation tag and transcriptional terminator sequences downstream of a recombinase sequence, i.e., the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev). Thus, in such embodiments, the single inducer engineered genetic counter comprises: iP.sub.1-[RRS.sub.for-iP.sub.1,inv-RBS-RC-D-T-RRS.sub.rev].sub.n-OP. In such embodiments, the recombinase encoded by each of the at least one SIMMs is a unique recombinase, such that expression of a recombinase in one SIMM does not result in inversion of sequences outside of that SIMM.

(213) In such single inducer engineered genetic counters, upon activation of the inducible promoter of the counter by an inducer or inducing agent, the recombinase encoded within the first SIMM is expressed, resulting in the inversion of the sequence between the two recombinase recognition sites, causing termination of recombinase expression, and allowing for the inverted promoter sequence within the first SIMM (i.e., iP.sub.1,inv) to be in the appropriate direction to drive expression of a downstream module or component, such as an output nucleic acid sequence, e.g., a gene, or another SIMM, if the counter receives a second same inducer signal.

(214) In some embodiments, a single inducer, 2 input, engineered genetic counter is provided, i.e., iP.sub.1-[RRS.sub.for-iP.sub.1,inv-RBS-RC-D-T-RRS.sub.rev]-OP. In such single inducer, 2 input, engineered genetic counters, the counter has to receive two discrete input signals of the same inducer for output nucleic acid expression to occur. In some such embodiments, the output nucleic acid sequence encodes a reporter protein, such as a fluorescent or luminescent reporter. In some embodiments, the output nucleic acid sequence further comprises an upstream RBS sequence. In some embodiments, the output nucleic acid sequence further comprises a downstream terminator sequence. In other embodiments, the output nucleic acid sequence further comprises both an upstream RBS sequence and a downstream terminator sequence.

(215) For example, in some embodiments, the single inducer, 2 input engineered genetic counter comprises a P.sub.BAD inducible promoter, i.e., iP.sub.BAD=iP.sub.1; FRT sites as recombinase recognition sites, i.e., RRS.sub.for and RRS.sub.rev are FRT.sub.f and FRT.sub.r sites respectively; a flp.sub.e recombinase, i.e., RC=flp.sub.e, and the output nucleic acid product is GFP, i.e., OP=GFP such that the engineered genetic counter comprises iP.sub.BAD-[FRT.sub.f-iP.sub.BAD,inv-RBS-flp.sub.e-D-T-FRT.sub.r]-GFP. In such embodiments, a first arabinose signal causes expression of the flp.sub.e recombinase within the SIMM, resulting in inversion of the recombinase sequence and inversion of the inducible promoter within the SIMM. A second arabinose signal results in expression of GFP driven by the iP.sub.BAD promoter of the SIMM. Thus, such a single inducer, 2 input engineered genetic counter gives an output signal only after the receipt of two independent inputs of the same inducer, i.e., the single inducer, 2 input engineered genetic counter counts to two.

(216) In other embodiments, a single inducer, 3 input, engineered genetic counter is provided, i.e., iP.sub.1-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.1,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]-OP. In such single inducer, 3 input, engineered genetic counters, the counter has to receive three discrete input signals of the same inducer for output gene expression to occur. In some such embodiments, the output gene sequence encodes a reporter protein, such as a fluorescent or luminescent reporter. In some embodiments, the output nucleic acid sequence further comprises an upstream RBS sequence. In some embodiments, the output nucleic acid sequence further comprises a downstream terminator sequence. In other embodiments, the output nucleic acid sequence further comprises both an upstream RBS sequence and a downstream terminator sequence.

(217) For example, in some embodiments, the single inducer, 3 input engineered genetic counter comprises a P.sub.BAD inducible promoter, i.e., iP.sub.BAD=iP.sub.1; a flp.sub.e recombinase SIMM (i.e., RRS.sub.1,for=FRT.sub.f; RRS.sub.1,rev=FRT.sub.r and RC.sub.1=flp.sub.e); a Cre recombinase SIMM (i.e., RRS.sub.2,for=loxP.sub.F; RRS.sub.2,rev=loxP.sub.R and RC.sub.2=Cre), and GFP as an output nucleic acid sequence, such that the engineered genetic counter comprises iP.sub.BAD-[FRT.sub.f-iP.sub.BAD,inv-RBS-flp.sub.e-D-T-FRT.sub.r]-[loxP.sub.F-iP.sub.BAD,inv-RBS-Cre-D-T-loxP.sub.R]-GFP. In such embodiments, a first arabinose signal causes expression of the flp.sub.e recombinase within the flp.sub.e SIMM, resulting in inversion of the flp.sub.e recombinase sequence and inversion of the inducible promoter within the flp.sub.e SIMM, while the inducible promoter within the Cre SIMM remains inverted. A second arabinose signal results in expression of the Cre recombinase within the Cre SIMM, resulting in inversion of the Cre recombinase sequence and inversion of the inducible promoter within the Cre. As the flp.sub.e recombinase is inverted, the second arabinose signal has no effect on the flp.sub.e SIMM. A third such arabinose signal results in expression of GFP driven by the iP.sub.BAD promoter of the Cre SIMM. Thus, such a single inducer, 3 input engineered genetic counter gives an output signal only after the receipt of three independent inputs of the same inducer, i.e., the single inducer, 3 input engineered genetic counter counts to three.

(218) In all such embodiments of these aspects, the single inducer engineered genetic counter described herein can comprise at least 150 SIMMs, where the number of SIMMs n in a counter is an integer that ranges between and includes 1 to 150, such that the single inducer engineered genetic counter counts to n+1, i.e., the number of input signal required for the output gene product to be expressed is n+1. For example, in one embodiment n equals 1, and the single inducer engineered genetic counter counts to 2. In another embodiment, n equals 2 and the single inducer engineered genetic counter counts to 3. In another embodiment, n equals 3 and the single inducer engineered genetic counter counts to 4. In another embodiment, n equals 4 and the single inducer engineered genetic counter counts to 5. In another embodiment, n equals 5 and the single inducer engineered genetic counter counts to 6. In another embodiment, n equals 6 and the single inducer engineered genetic counter counts to 7. In another embodiment, n equals 7 and the single inducer engineered genetic counter counts to 8. In another embodiment, n equals 8 and the single inducer engineered genetic counter counts to 9. In another embodiment, n equals 9 and the single inducer engineered genetic counter counts to 10. In another embodiment, n equals 10 and the single inducer engineered genetic counter counts to 11. In another embodiment, n equals any one of 11 . . . 25 . . . 45 . . . 90 . . . 99 . . . 105 . . . 125 . . . 150. For example, n equals 12. In another embodiment, n equals 117. In another embodiment, n is an integer value ranging between 10-150. In another embodiment, n is an integer value ranging between 10 and 15. In another embodiment, n is an integer value ranging between 15 and 20. In another embodiment, n is an integer value ranging between 25 and 30. In another embodiment, n is an integer value ranging between 30 and 35. In another embodiment, n is an integer value ranging between 35 and 40. In another embodiment, n is an integer value ranging between 40 and 45. In another embodiment, n is an integer value ranging between 45 and 50. In another embodiment, n is an integer value ranging between 50 and 55. In another embodiment, n is an integer value ranging between 55 and 60. In another embodiment, n is an integer value ranging between 60 and 65. In another embodiment, n is an integer value ranging between 65 and 70. In another embodiment, n is an integer value ranging between 70 and 75. In another embodiment, n is an integer value ranging between 75 and 80. In another embodiment, n is an integer value ranging between 80 and 85. In another embodiment, n is an integer value ranging between 85 and 90. In another embodiment, n is an integer value ranging between 90 and 95. In another embodiment, n is an integer value ranging between 95 and 100. In another embodiment, n is an integer value ranging between 100 and 105. In another embodiment, n is an integer value ranging between 105 and 110. In another embodiment, n is an integer value ranging between 110 and 115. In another embodiment, n is an integer value ranging between 115 and 120. In another embodiment, n is an integer value ranging between 120 and 125. In another embodiment, n is an integer value ranging between 125 and 130. In another embodiment, n is an integer value ranging between 130 and 135. In another embodiment, n is an integer value ranging between 135 and 140. In another embodiment, n is an integer value ranging between 140 and 145. In another embodiment, n is an integer value ranging between 145 and 150. In all the ranges described herein, both the lower and upper values of the range are included. In other aspects, the single inducer engineered genetic counter can be extended with more sophisticated designs to count in binary, thus allowing the maximum countable number to be 2.sup.n1.

(219) In other aspects, multiple inducer engineered genetic counters are provided. Multiple inducer engineered genetic counters can be used to distinguish multiple input signals occurring in a specific order, such that output nucleic acid expression occurs only when a certain number of signals in a specific order are received by the counter. Such multiple inducer engineered genetic counters comprise an inducible promoter sequence (iP.sub.A), at least one SIMM, and an output nucleic acid sequence (OP). In such counters, the inverted promoter sequences of at least one SIMM and the inducible promoter sequence of the counter are different promoter sequences, or are responsive to at least two different inducers. In some embodiments of the aspects described herein, the SIMM comprises a ribosome binding site upstream of a recombinase sequence, and protein degradation tag and transcriptional terminator sequences downstream of a recombinase sequence, i.e., the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev). Thus, in such embodiments, the multiple inducer engineered genetic counter comprises: iP.sub.A-[RRS.sub.for-iP.sub.1,inv-RBS-RC-D-T-RRS.sub.rev].sub.n-OP. In such embodiments, the recombinase encoded by each of the at least one SIMMs is a unique recombinase, such that expression of a recombinase in one SIMM does not result in inversion of sequences outside of that SIMM.

(220) In some embodiments of such aspects, a multiple inducer, 2 input, engineered genetic counter is provided, i.e., iP.sub.A-[RRS.sub.for-iP.sub.1,inv-RBS-RC-D-T-RRS.sub.rev]-OP. In such multiple inducers, 2 input, engineered genetic counters, the counter has to receive two discrete input signals of different inducers for output nucleic acid expression to occur. In some such embodiments, the output nucleic acid sequence encodes a reporter protein, such as a fluorescent or luminescent reporter. In some embodiments, the output nucleic acid sequence further comprises a downstream terminator sequence. In other embodiments, the output nucleic acid sequence further comprises both an upstream RBS sequence and a downstream terminator sequence.

(221) For example, in some embodiments, the multiple inducer, 2 input engineered genetic counter comprises a P.sub.LtetO-1 inducible promoter, i.e., iP.sub.LtetO-1=iP.sub.A; an inverted P.sub.BAD promoter that drives expression of the SIMM, i.e., iP.sub.BAD,inv=iP.sub.1,inv; FRT sites as recombinase recognition sites in the SIMM, i.e., RRS.sub.for and RRS.sub.rev are FRT.sub.f and FRT.sub.r sites respectively; a flp.sub.e recombinase, i.e., RC=flp.sub.e, and the output nucleic acid product is GFP, i.e., OP=GFP. In such embodiments, the engineered genetic counter comprises iP.sub.LtetO-1-[FRT.sub.f-iP.sub.BAD,inv-RBS-flp.sub.e-D-T-FRT.sub.r]-GFP. In such embodiments, exposure to anhydrotetracycline causes expression of the flp.sub.e recombinase within the SIMM, resulting in inversion of the recombinase sequence and inversion of the inducible promoter P.sub.BAD within the SIMM. Exposure to an arabinose signal results in expression of GFP driven by the iP.sub.BAD promoter of the SIMM. Thus, such a multiple inducer, 2 input engineered genetic counter gives an output signal only after the receipt of two independent inputs of two different inducers, i.e., the multiple inducer, 2 input engineered genetic counter counts to two.

(222) In other embodiments, a multiple inducer, 3 input, engineered genetic counter is provided, i.e., iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.2,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]-OP. In such multiple inducers, 3 input, engineered genetic counters, the counter has to receive three discrete input signals of at least two different inducers for output nucleic acid expression to occur. In some embodiments, each inducible promoter in the engineered genetic counter is responsive to a different inducer, i.e., all the inducible promoters are different. In other embodiments, at least one inducible promoter in the engineered genetic counter is responsive to a different inducer from the other inducible promoters. Specific combinations of inducible promoters can be used to create engineered genetic counters that receive specific patterns of multiple inducers. For example, an engineered genetic counter can be designed so that every other inducible promoter is responsive to the same inducer or inducing agent, such that the counter detects alternate exposures to a combination of inducers, for example, arabinose followed by anyhydrotetracycline.

(223) In some such embodiments, the output nucleic acid sequence encodes a reporter protein, such as a fluorescent or luminescent reporter. In some embodiments, the output nucleic acid sequence further comprises an upstream RBS sequence. In some embodiments, the output nucleic acid sequence further comprises a downstream terminator sequence. In other embodiments, the output nucleic acid sequence further comprises both an upstream RBS sequence and a downstream terminator sequence.

(224) For example, in some embodiments, the multiple inducer, 3 input engineered genetic counter comprises a P.sub.LtetO-1 inducible promoter that receives the first signal of the engineered genetic counter i.e., iP.sub.LtetO-1=iP.sub.A, and the output nucleic acid product is GFP, i.e., OP=GFP. The first SIMM comprises an inverted P.sub.BAD promoter that drives expression of the first SIMM, i.e., iP.sub.BAD,inv=iP.sub.1,inv; FRT sites as recombinase recognition sites in the first SIMM, i.e., RRS.sub.for and RRS.sub.rev are FRT.sub.f and FRT.sub.r sites respectively; a flp.sub.e recombinase, i.e., RC=flp.sub.e. The second SIMM comprises an inverted iP.sub.A1lacO-1 promoter that drives expression of the second SIMM, i.e., iP.sub.A1lacO-1,inv=iP.sub.2,inv; LoxP sites as recombinase recognition sites in the second SIMM, i.e., RRS.sub.2,for=loxP.sub.F; RRS.sub.2,rev=loxP.sub.R; and a Cre recombinase as the recombinase of the second SIMM. In such embodiments, the engineered genetic counter comprises iP.sub.BAD-[FRT.sub.f-iP.sub.BAD,inv-RBS-flp.sub.e-D-T-FRT.sub.r]-[loxP.sub.F-iP.sub.A1lacO-1,inv-RBS-Cre-D-T-loxP.sub.R]-GFP. In such embodiments, exposure to anhydrotetracycline causes expression of the flp.sub.e recombinase within the first SIMM, resulting in inversion of the flp.sub.e recombinase sequence and inversion of the inducible promoter P.sub.BAD within the first SIMM. Exposure to an arabinose signal results in expression of the Cre recombinase within the second SIMM, resulting in inversion of the Cre recombinase sequence and inversion of the inducible promoter iP.sub.A1lacO-1 within the second SIMM. Exposure to IPTG then drives expression of the output nucleic acid sequence resulting in GFP expression. Thus, such a multiple inducer, 3 input engineered genetic counter gives an output signal only after the receipt of three independent inputs of at least two different inducers, i.e., the multiple inducer, 3 input engineered genetic counter counts to three.

(225) In all embodiments of the aspects described herein, the multiple inducer engineered genetic counters can comprise at least 150 SIMMs, where the number of SIMMs n in a counter is an integer that ranges between and includes 1 to 150, such that the multiple inducer engineered genetic counter counts to n+1, i.e., the number of input signals required for the output product to be expressed is n+1. For example, in one embodiment n equals 1, and the multiple inducer engineered genetic counter counts to 2. In another embodiment, n equals 2 and the multiple inducer engineered genetic counter counts to 3. In another embodiment, n equals 3 and the multiple inducer engineered genetic counter counts to 4. In another embodiment, n equals 4 and the multiple inducer engineered genetic counter counts to 5. In another embodiment, n equals 5 and the multiple inducer engineered genetic counter counts to 6. In another embodiment, n equals 6 and the multiple inducer engineered genetic counter counts to 7. In another embodiment, n equals 7 and the multiple inducer engineered genetic counter counts to 8. In another embodiment, n equals 8 and the multiple inducer engineered genetic counter counts to 9. In another embodiment, n equals 9 and the multiple inducer engineered genetic counter counts to 10. In another embodiment, n equals 10 and the multiple inducer engineered genetic counter counts to 11. In another embodiment, n equals any one of 11 . . . 25 . . . 45 . . . 90 . . . 99 . . . 105 . . . 125 . . . 150. For example, n equals 12. In another embodiment, n equals 117. In another embodiment, n is an integer value ranging between 10-150. In another embodiment, n is an integer value ranging between 10 and 15. In another embodiment, n is an integer value ranging between 15 and 20. In another embodiment, n is an integer value ranging between 25 and 30. In another embodiment, n is an integer value ranging between 30 and 35. In another embodiment, n is an integer value ranging between 35 and 40. In another embodiment, n is an integer value ranging between 40 and 45. In another embodiment, n is an integer value ranging between 45 and 50. In another embodiment, n is an integer value ranging between 50 and 55. In another embodiment, n is an integer value ranging between 55 and 60. In another embodiment, n is an integer value ranging between 60 and 65. In another embodiment, n is an integer value ranging between 65 and 70. In another embodiment, n is an integer value ranging between 70 and 75. In another embodiment, n is an integer value ranging between 75 and 80. In another embodiment, n is an integer value ranging between 80 and 85. In another embodiment, n is an integer value ranging between 85 and 90. In another embodiment, n is an integer value ranging between 90 and 95. In another embodiment, n is an integer value ranging between 95 and 100. In another embodiment, n is an integer value ranging between 100 and 105. In another embodiment, n is an integer value ranging between 105 and 110. In another embodiment, n is an integer value ranging between 110 and 115. In another embodiment, n is an integer value ranging between 115 and 120. In another embodiment, n is an integer value ranging between 120 and 125. In another embodiment, n is an integer value ranging between 125 and 130. In another embodiment, n is an integer value ranging between 130 and 135. In another embodiment, n is an integer value ranging between 135 and 140. In another embodiment, n is an integer value ranging between 140 and 145. In another embodiment, n is an integer value ranging between 145 and 150. In all the ranges described herein, both the lower and upper values of the range are included. In other aspects, the multiple inducer engineered nucleic acid-based circuit can be extended with more sophisticated designs to count in binary, thus allowing the maximum countable number to be 2.sup.n1.

(226) In some embodiments of the different aspects of the invention described herein, additional components can be added to the SIMMs to increase the utility and functionality of the SIMM in the engineered genetic counters. In some embodiments, output nucleic acid sequences can be included within an individual SIMM, such that an individual SIMM regulates its own output nucleic acid expression. Regulation of an output nucleic acid sequence within a SIMM is dependent on the placement and orientation of the output nucleic acid sequence within the SIMM. For example, in some embodiments, the output nucleic acid sequence is placed in an inverted orientation between the recombinase recognition sites, such that upon expression of the recombinase encoded by the SIMM, the output nucleic acid sequence is inverted and can be driven by the promoter sequence of the SIMM upon receipt of the appropriate input signal by the SIMM, i.e., the SIMM comprises (RRS.sub.for-iP.sub.inv-RBS-RC-D-T-OP.sub.inv-RRS.sub.rev). In some embodiments, regulation of output nucleic acid sequence transcription within the SIMM can be enhanced through the addition of an RBS sequence, a terminator sequence, or a combination thereof, such that the RBS sequence and/or terminator sequence are also placed in the inverted orientation.

(227) In other embodiments where an output nucleic acid sequence is included within an individual SIMM, the output nucleic acid sequence can be placed in the forward orientation between the recombinase recognition sites, i.e., (RRS.sub.for-iP.sub.inv-RBS-RC-D-T-OP-RRS.sub.rev). In such embodiments, upon activation of the promoter sequence that drives expression of that SIMM, for example, the promoter sequence of an upstream SIMM, expression of both the recombinase and the output nucleic acid product occurs. Inversion of the sequence within the two recombinase recognition sites then occurs due to the activity of the recombinase, resulting in inversion of the output nucleic acid sequence, thus shutting off expression of the output nucleic acid product. Thus, in such embodiments, an individual SIMM can creates a single pulse of expression of an output nucleic acid product. When multiple such SIMMs are used in the engineered genetic counters described herein, each count is represented by a single pulse of output nucleic acid expression, thus achieving enumeration of each count recorded by the engineered genetic counters described herein. In some such embodiments, regulation of output nucleic acid sequence transcription within the SIMM can be enhanced through the addition of an RBS sequence, a terminator sequence, or a combination thereof, such that the RBS sequence and/or terminator sequence.

(228) In some embodiments, the engineered genetic counters are designed so that they can reset by placing an additional inverted promoter sequence downstream of the reverse recombinase recognition site within a SIMM, i.e., iP.sub.A-(RRS.sub.for-iP.sub.1,inv-RBS-RC-D-T-RRS.sub.rev-iP.sub.reset,inv).sub.n-OP, where iP.sub.reset,inv is the inverted sequence of the reset promoter. In such embodiments, upon activation of the reverse promoter, all recombinases in the reverse orientation are expressed and flipped back to their original position. Thus, the state of the system is flipped from its inverted state back to its original state. If the same reverse promoter is used throughout the entire set of SIMMs within a counter, a single inducer can be used to perform a global reset of the memory system, which has great utility for regulating the counters described herein

(229) In some embodiments of these aspects, one or more of any of the SIMMs described herein can be daisy-chained together on an E. coli chromosome, with a promoter placed upstream of the first SIMM. In some embodiments of these aspects, the designs utilized in the engineered genetic counters described herein are cis-based counting systems that require physical proximity of the individual counting units, or SIMMs, for counting transitions. In other embodiments of these aspects, further functionality is provided by incorporating trans-acting components to couple the counters to other engineered genetic and biological circuit designs. In one such embodiment, the engineered genetic counter is coupled to a toggle switch. For example, in some embodiments, the engineered genetic counters can be coupled to quorum-sensing engineered biological circuits to create consensus-based counting systems.

(230) Some non-limiting examples of output products for use in the engineered genetic counters described herein are fluorescent proteins, such as GFP, RFP and YFP, transcription factors, transcriptional repressors, or RNAs, such as riboswitches in prokaryotic and mammalian cells, as well as short-hairpin RNAs in mammalian cells (F. J. Isaacs, Nat Biotechnol 22, 841 (2004)). Further non-limiting examples of output gene sequences and output products for use in the SIMMs, as described herein, are provided in the foregoing section entitled Output Nucleic Acid Sequences and Output Products and in Tables 59-73, and include, but are not limited to, reporter proteins, transcriptional repressors, transcriptional activators, selection markers, enzymes, receptor proteins, ligand proteins, RNAs, riboswitches or short-hairpin RNAs. The choice of an output nucleic acid sequence for use in the engineered genetic counters described herein is dependent on a variety of factors, including whether an output nucleic acid product should be detected by the skilled artisan, or whether the output nucleic acid product is itself responsive to a particular set of inputs. For example, an engineered genetic counter can be designed so that the output nucleic acid product is an enzyme that is produced only when the counter receives a certain number of inputs, such as a toxin.

(231) Uses of Engineered Genetic Counters

(232) The engineered genetic counters described herein are useful for engineering complex behavioral phenotypes in cellular systems, such as prokaryotic, eukaryotic, or synthetic cells, or in non-cellular systems, including test tubes, viruses and phages. The novel engineered genetic counters described herein combine the power of nucleic acid-based engineering methods with systems biology approaches to elicit targeted responses in cellular and non-cellular systems, such as the ability to count specific inputs, and respond to such inputs.

(233) In some of the aspects described herein, an engineered genetic counter is provided for use in cellular systems, such as bacteria, to count input signals received by the cellular system. In some aspects, engineered genetic counters are provided for use in non-cellular systems, such as viruses or phages, to count input signals received by the non-cellular system. In other aspects, methods are provided for counting at least 1 event in a cellular or non-cellular system comprising introducing an engineered genetic counter into a cellular or non-cellular system for use in counting events in the cellular or non-cellular system. In one aspect, a method is provided for counting at least 2 events in a cellular system comprising introducing an engineered genetic counter into a cellular system for use in counting events or inputs. In one embodiment, a method is provided for counting at least 1 . . . 3 . . . 26 . . . 45 . . . 76 . . . 96 . . . 121 . . . 150 events in a cellular or non-cellular system, the method comprising introducing an engineered genetic counter into a cellular or non-cellular system for use in counting events. Such an engineered counter can be a multiple inducer or single inducer counter.

(234) The engineered genetic counters described herein can be used for a variety of applications and in many different types of methods, including, but not limited to, bioremediation, biosensing, and biomedical therapeutics. For example, in some embodiments, an engineered genetic counter is coupled to the cell cycle for use in a cellular system. In such embodiments, the output gene product can be a toxin or agent that causes cell death, such that the cellular system dies after a certain number of events is counted by the counter. Such embodiments of the engineered counters described herein are useful in biosensing and bioremediation applications. In other embodiments, the engineered genetic counters described herein can be modified to perform continuous inversion events. In one such embodiment, the engineered genetic counters can be introduced into a cellular system to provide transcriptional pulses. In addition, such embodiments where an engineered genetic counter is coupled to the cell cycle can be useful in biomedical or therapeutic applications, such as in therapies for cancer or other proliferative disorders. In some embodiments of the aspects described herein, an engineered genetic counter can be introduced into a mammalian cell to count the number of mutations that are required to produce a cancer cell. In other embodiments of the aspects described herein, the engineered genetic counters can be introduced into cellular systems, such as ex vivo or in vivo mammalian cells to maintain genetic memory of low frequency events. Such embodiments are useful for therapeutic applications or research purposes, such as the study of neural circuits.

(235) The methods and uses of the engineered genetic counters described herein can involve in vivo, ex vivo, or in vitro systems. The term in vivo refers to assays or processes that occur in or within an organism, such as a multicellular animal. In some of the aspects described herein, a method or use can be said to occur in vivo when a unicellular organism, such as a bacteria, is used. The term ex vivo refers to methods and uses that are performed using a living cell with an intact membrane that is outside of the body of a multicellular animal or plant, e.g., explants, cultured cells, including primary cells and cell lines, transformed cell lines, and extracted tissue or cells, including blood cells, among others. The term in vitro refers to assays and methods that do not require the presence of a cell with an intact membrane, such as cellular extracts, and can refer to the introducing an engineered genetic counter in a non-cellular system, such as a media not comprising cells or cellular systems, such as cellular extracts.

(236) A cell to be engineered for use with the engineered genetic counters described herein can be any cell or host cell. As defined herein, a cell or cellular system is the basic structural and functional unit of all known independently living organisms. It is the smallest unit of life that is classified as a living thing, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. A natural cell, as defined herein, refers to any prokaryotic or eukaryotic cell found naturally. A prokaryotic cell can comprise a cell envelope and a cytoplasmic region that contains the cell genome (DNA) and ribosomes and various sorts of inclusions.

(237) In some embodiments, the cell is a eukaryotic cell. A eukaryotic cell comprises membrane-bound compartments in which specific metabolic activities take place, such as a nucleus. In other embodiments, the cell or cellular system is an artificial or synthetic cell. As defined herein, an artificial cell or a synthetic cell is a minimal cell formed from artificial parts that can do many things a natural cell can do, such as transcribe and translate proteins and generate ATP.

(238) Host cells of use in the aspects of the invention upon transformation or transfection with the engineered genetic counters include any host cell that is capable of supporting the activation and expression of the engineered genetic counters. In some embodiments of the aspects described herein, the cells are bacterial cells. The term bacteria as used herein is intended to encompass all variants of bacteria, for example, prokaryotic organisms and cyanobacteria. Bacteria are small (typical linear dimensions of around 1 m), non-compartmentalized, with circular DNA and ribosomes of 70S. The term bacteria also includes bacteria subdivisions of Eubacteria and Archaebacteria. Eubacteria can be further subdivided on the basis of their staining using Gram stain, and both gram-positive and gram-negative eubacteria, which depends upon a difference in cell wall structure are also included, as well as classified based on gross morphology alone (into cocci, bacilli, etc.).

(239) In some embodiments, the bacterial cells are gram-negative cells and in alternative embodiments, the bacterial cells are gram-positive cells. Non-limiting examples of species of bacterial cells useful for engineering with the engineered genetic counters of the invention include, without limitation, cells from Escherichia coli, Bacillus subtilis, Salmonella typhimurium and various species of Pseudomonas, Streptomyces, and Staphylococcus. Other examples of bacterial cells that can be genetically engineered for use with the biological circuit chemotactic converters of the invention include, but are not limited to, cells from Yersinia spp., Escherichia spp., Klebsiella spp., Bordetella spp., Neisseria spp., Aeromonas spp., Franciesella spp., Corynebacterium spp., Citrobacter spp., Chlamydia spp., Hemophilus spp., Brucella spp., Mycobacterium spp., Legionella spp., Rhodococcus spp., Pseudomonas spp., Helicobacter spp., Salmonella spp., Vibrio spp., Bacillus spp., and Erysipelothrix spp. In some embodiments, the bacterial cells are E. coli cells. Other examples of organisms from which cells may be transformed or transfected with the engineered genetic counters of the present invention include, but are not limited to the following: Staphylococcus aureus, Bacillus subtilis, Clostridium butyricum, Brevibacterium lactofermentum, Streptococcus agalactiae, Lactococcus lactis, Leuconostoc lactis, Streptomyces, Actinobacillus actinobycetemcomitans, Bacteroides, cyanobacteria, Escherichia coli, Helobacter pylori, Selnomonas ruminatium, Shigella sonnei, Zymomonas mobilis, Mycoplasma mycoides, or Treponema denticola, Bacillus thuringiensis, Staphlococcus lugdunensis, Leuconostoc oenos, Corynebacterium xerosis, Lactobacillus planta rum, Streptococcus faecalis, Bacillus coagulans, Bacillus ceretus, Bacillus popillae, Synechocystis strain PCC6803, Bacillus liquefaciens, Pyrococcus abyssi, Selenomonas nominantium, Lactobacillus hilgardii, Streptococcus ferus, Lactobacillus pentosus, Bacteroides fragilis, Staphylococcus epidermidis, Staphylococcus epidermidis, Zymomonas mobilis, Streptomyces phaechromogenes, Streptomyces ghanaenis, Halobacterium strain GRB, and Halobaferax sp. strain Aa2.2.

(240) In alternative embodiments, the cells can be any cell, for example mammalian cells, plant cells and chimeric cells. In some embodiments, the cells can be from any organism or multi-cell organism. Examples of eukaryotic cells that can be useful in aspects of the invention include eukaryotic cells selected from, e.g., mammalian, insect, yeast, or plant cells. In some embodiments, the eukaryotic cells are from a vertebrate animal. The present invention contemplates the use of any such vertebrate cells for the engineered genetic counters, including, but not limited to, reproductive cells including sperm, ova and embryonic cells, and non-reproductive cells, such as kidney, lung, spleen, lymphoid, cardiac, gastric, intestinal, pancreatic, muscle, bone, neural, brain, and epithelial cells.

(241) In other embodiments of the aspects described herein, engineered genetic counters can be introduced into a non-cellular system such as a virus or phage, by direct integration of the engineered genetic counter nucleic acid, for example, into the viral genome. A virus for use with the engineered genetic counters described herein can be a dsDNA virus (e.g. Adenoviruses, Herpesviruses, Poxviruses), a ssDNA viruses ((+)sense DNA) (e.g. Parvoviruses); a dsRNA virus (e.g. Reoviruses); a (+)ssRNA viruses ((+)sense RNA) (e.g. Picornaviruses, Togaviruses); ()ssRNA virus (()sense RNA) (e.g. Orthomyxoviruses, Rhabdoviruses); a ssRNA-Reverse Transcriptase viruses ((+)sense RNA with DNA intermediate in life-cycle) (e.g. Retroviruses); or a dsDNA-Reverse Transcriptase virus (e.g. Hepadnaviruses).

(242) Viruses can also include plant viruses and bacteriophages or phages. Examples of phage families that can be used with the engineered genetic counters described herein include, but are not limited to, Myoviridae (T4-like viruses; P1-like viruses; P2-like viruses; Mu-like viruses; SPO1-like viruses; H-like viruses); Siphoviridae-like viruses (T1-like viruses; T5-like viruses; c2-like viruses; L5-like viruses; M1-like viruses; C31-like viruses; N15-like viruses); Podoviridae (T7-like viruses; 29-like viruses; P22-like viruses; N4-like viruses); Tectiviridae (Tectivirus); Corticoviridae (Corticovirus); Lipothrixviridae (Alphalipothrixvirus, Betalipothrixvirus, Gammalipothrixvirus, Deltalipothrixvirus); Plasmaviridae (Plasmavirus); Rudiviridae (Rudivirus); Fuselloviridae (Fusellovirus); Inoviridae (Inovirus, Plectrovirus); Microviridae (Microvirus, Spiromicrovirus, Bdellomicrovirus, Chlamydiamicrovirus); Leviviridae (Levivirus, Allolevivirus) and Cystoviridae (Cystovirus). Such phages can be naturally occurring or engineered phages.

(243) In some embodiments of the aspects described herein, the engineered genetic counters are introduced into a cellular or non-cellular system using a vector or plasmid for use in counting events in the system. As used herein, the term vector is used interchangeably with plasmid to refer to a nucleic acid molecule capable of transporting another nucleic acid to which it has been linked. Vectors capable of directing the expression of genes and/or nucleic acid sequence to which they are operatively linked are referred to herein as expression vectors.. In general, expression vectors of utility in the methods and engineered genetic counters described herein are often in the form of plasmids, which refer to circular double stranded DNA loops which, in their vector form are not bound to the chromosome.

(244) Other expression vectors can be used in different embodiments of the invention, for example, but not limited to, plasmids, episomes, bacteriophages or viral vectors, and such vectors can integrate into the host's genome or replicate autonomously in the particular cellular system used. Other forms of expression vectors known by those skilled in the art which serve the equivalent functions can also be used. Expression vectors comprise expression vectors for stable or transient expression encoding the DNA. A vector can be either a self replicating extrachromosomal vector or a vector which integrates into a host genome. One type of vector is a genomic integrated vector, or integrated vector, which can become integrated into the chromosomal DNA or RNA of a host cell, cellular system, or non-cellular system. In some embodiments, the nucleic acid sequence or sequences encoding the engineered genetic counter integrates into the chromosomal DNA or RNA of a host cell, cellular system, or non-cellular system along with components of the vector sequence. In other embodiments, the nucleic acid sequence encoding the engineered genetic counter directly integrates into chromosomal DNA or RNA of a host cell, cellular system, or non-cellular system, in the absence of any components of the vector by which it was introduced. In such embodiments, the nucleic acid sequence encoding the engineered genetic counter can be integrated using targeted insertions, such as knock-in technologies or homologous recombination techniques, or by non-targeted insertions, such as gene trapping techniques or non-homologous recombination. The number of copies of an engineered genetic counter that integrate into the chromosomal DNA or RNA of a cellular or non-cellular system can impact the fidelity of counting, and thus it is preferred that only one copy is integrated per cellular system. Accordingly, in some embodiments of the aspects described herein, only one copy of an engineered genetic counter is integrated in the chromosomal DNA or RNA of a cellular or non-cellular system. In some embodiments, the number of copies is less than 10, less than 9, less than 8, less than 7, less than 6, less than 6, less than 4, less than 3, or less than 2.

(245) Another type of vector is an episomal vector, i.e., a nucleic acid capable of extrachromosomal replication. Such plasmids or vectors can include plasmid sequences from bacteria, viruses or phages. Such vectors include chromosomal, episomal and virus-derived vectors e.g., vectors derived from bacterial plasmids, bacteriophages, yeast episomes, yeast chromosomal elements, and viruses, vectors derived from combinations thereof, such as those derived from plasmid and bacteriophage genetic elements, cosmids and phagemids. A vector can be a plasmid, bacteriophage, bacterial artificial chromosome (BAC) or yeast artificial chromosome (YAC). A vector can be a single or double-stranded DNA, RNA, or phage vector. In some embodiments, the engineered genetic counters are introduced into a cellular system using a BAC vector.

(246) The vectors comprising the engineered genetic counters described herein may be introduced into cells as polynucleotides, preferably DNA, by techniques well-known in the art for introducing DNA and RNA into cells. The term transduction refers to any method whereby a nucleic acid sequence is introduced into a cell, e.g., by transfection, lipofection, electroporation, biolistics, passive uptake, lipid:nucleic acid complexes, viral vector transduction, injection, contacting with naked DNA, gene gun, and the like. The vectors, in the case of phage and viral vectors may also be introduced into cells as packaged or encapsidated virus by well-known techniques for infection and transduction. Viral vectors may be replication competent or replication defective. In the latter case, viral propagation generally occurs only in complementing host cells. In some embodiments, the engineered genetic counters are introduced into a cell using other mechanisms known to one of skill in the art, such as a liposome, microspheres, gene gun, fusion proteins, such as a fusion of an antibody moiety with a nucleic acid binding moiety, or other such delivery vehicle.

(247) The engineered genetic counters or the vectors comprising the engineered genetic counters described herein can be introduced into a cell using any method known to one of skill in the art. The term transformation as used herein refers to the introduction of genetic material (e.g., a vector comprising an engineered genetic counter) comprising one or more modules or engineered genetic counters described herein into a cell, tissue or organism. Transformation of a cell may be stable or transient. The term transient transformation or transiently transformed refers to the introduction of one or more transgenes into a cell in the absence of integration of the transgene into the host cell's genome. Transient transformation may be detected by, for example, enzyme linked immunosorbent assay (ELISA), which detects the presence of a polypeptide encoded by one or more of the transgenes. Alternatively, transient transformation may be detected by detecting the activity of the protein encoded by the transgene. The term transient transformant refers to a cell which has transiently incorporated one or more transgenes.

(248) In contrast, the term stable transformation or stably transformed refers to the introduction and integration of one or more transgenes into the genome of a cell or cellular system, preferably resulting in chromosomal integration and stable heritability through meiosis. Stable transformation of a cell may be detected by Southern blot hybridization of genomic DNA of the cell with nucleic acid sequences, which are capable of binding to one or more of the transgenes. Alternatively, stable transformation of a cell may also be detected by the polymerase chain reaction of genomic DNA of the cell to amplify transgene sequences. The term stable transformant refers to a cell or cellular, which has stably integrated one or more transgenes into the genomic DNA. Thus, a stable transformant is distinguished from a transient transformant in that, whereas genomic DNA from the stable transformant contains one or more transgenes, genomic DNA from the transient transformant does not contain a transgene. Transformation also includes introduction of genetic material into plant cells in the form of plant viral vectors involving epichromosomal replication and gene expression, which may exhibit variable properties with respect to meiotic stability. Transformed cells, tissues, or plants are understood to encompass not only the end product of a transformation process, but also transgenic progeny thereof.

(249) Definitions

(250) The terms nucleic acids and nucleotides refer to naturally occurring or synthetic or artificial nucleic acid or nucleotides. The terms nucleic acids and nucleotides comprise deoxyribonucleotides or ribonucleotides or any nucleotide analogue and polymers or hybrids thereof in either single- or doublestranded, sense or antisense form. As will also be appreciated by those in the art, many variants of a nucleic acid can be used for the same purpose as a given nucleic acid. Thus, a nucleic acid also encompasses substantially identical nucleic acids and complements thereof. Nucleotide analogues include nucleotides having modifications in the chemical structure of the base, sugar and/or phosphate, including, but not limited to, 5-position pyrimidine modifications, 8-position purine modifications, modifications at cytosine exocyclic amines, substitution of 5-bromo-uracil, and the like; and 2-position sugar modifications, including but not limited to, sugar-modified ribonucleotides in which the 2-OH is replaced by a group selected from H, OR, R, halo, SH, SR, NH2, NHR, NR2, or CN. shRNAs also can comprise non-natural elements such as non-natural bases, e.g., ionosin and xanthine, nonnatural sugars, e.g., 2-methoxy ribose, or non-natural phosphodiester linkages, e.g., methylphosphonates, phosphorothioates and peptides.

(251) The term nucleic acid sequence or oligonucleotide or polynucleotide are used interchangeably herein and refers to at least two nucleotides covalently linked together. The term nucleic acid sequence is also used inter-changeably herein with gene, cDNA, and mRNA. As will be appreciated by those in the art, the depiction of a single nucleic acid sequence also defines the sequence of the complementary nucleic acid sequence. Thus, a nucleic acid sequence also encompasses the complementary strand of a depicted single strand. Unless otherwise indicated, a particular nucleic acid sequence also implicitly encompasses conservatively modified variants thereof (e.g., degenerate codon substitutions) and complementary sequences, as well as the sequence explicitly indicated. As will also be appreciated by those in the art, a single nucleic acid sequence provides a probe that can hybridize to the target sequence under stringent hybridization conditions. Thus, a nucleic acid sequence also encompasses a probe that hybridizes under stringent hybridization conditions. The term nucleic acid sequence refers to a single or double-stranded polymer of deoxyribonucleotide or ribonucleotide bases read from the 5-to the 3-end. It includes chromosomal DNA, self-replicating plasmids, infectious polymers of DNA or RNA and DNA or RNA that performs a primarily structural role. Nucleic acid sequence also refers to a consecutive list of abbreviations, letters, characters or words, which represent nucleotides. Nucleic acid sequences can be single stranded or double stranded, or can contain portions of both double stranded and single stranded sequence. The nucleic acid sequence can be DNA, both genomic and cDNA, RNA, or a hybrid, where the nucleic acid sequence can contain combinations of deoxyribo- and ribo-nucleotides, and combinations of bases including uracil, adenine, thymine, cytosine, guanine, inosine, xanthine hypoxanthine, isocytosine and isoguanine. Nucleic acid sequences can be obtained by chemical synthesis methods or by recombinant methods. A nucleic acid sequence will generally contain phosphodiester bonds, although nucleic acid analogs can be included that can have at least one different linkage, e.g., phosphoramidate, phosphorothioate, phosphorodithioate, or O-methylphosphoroamidite linkages and peptide nucleic acid backbones and linkages in the nucleic acid sequence. Other analog nucleic acids include those with positive backbones; non-ionic backbones, and non-ribose backbones, including those described in U.S. Pat. Nos. 5,235,033 and 5,034,506, which are incorporated by reference. Nucleic acid sequences containing one or more non-naturally occurring or modified nucleotides are also included within one definition of nucleic acid sequences. The modified nucleotide analog can be located for example at the 5-end and/or the 3-end of the nucleic acid sequence. Representative examples of nucleotide analogs can be selected from sugar- or backbone-modified ribonucleotides. It should be noted, however, that also nucleobase-modified ribonucleotides, i.e. ribonucleotides, containing a non naturally occurring nucleobase instead of a naturally occurring nucleobase such as uridines or cytidines modified at the 5-position, e.g. 5-(2-amino)propyl uridine, 5-bromo uridine; adenosines and guanosines modified at the 8-position, e.g. 8-bromo guanosine; deaza nucleotides, e.g. 7 deaza-adenosine; O- and N-alkylated nucleotides, e.g. N6-methyl adenosine are suitable. The 2 OH-group can be replaced by a group selected from H, OR, R, halo, SH, SR, NH2, NHR, NR2 or CN, wherein R is C-C6 alkyl, alkenyl or alkynyl and halo is F, Cl, Br or I. Modifications of the ribose-phosphate backbone can be done for a variety of reasons, e.g., to increase the stability and half-life of such molecules in physiological environments or as probes on a biochip. Mixtures of naturally occurring nucleic acids and analogs can be used; alternatively, mixtures of different nucleic acid analogs, and mixtures of naturally occurring nucleic acids and analogs can be used. Nucleic acid sequences include but are not limited to, nucleic acid sequence encoding proteins, for example that act as transcriptional repressors, antisense molecules, ribozymes, small inhibitory nucleic acid sequences, for example but not limited to RNAi, shRNAi, siRNA, micro RNAi (mRNAi), antisense oligonucleotides etc.

(252) The term oligonucleotide as used herein refers to an oligomer or polymer of ribonucleic acid (RNA) or deoxyribonucleic acid (DNA) or mimetics thereof, as well as oligonucleotides having non-naturally-occurring portions which function similarly. Such modified or substituted oligonucleotides are often preferred over native forms because of desirable properties such as, for example, enhanced cellular uptake, enhanced affinity for nucleic acid target and increased stability in the presence of nucleases. An oligonucleotide preferably includes two or more nucleomonomers covalently coupled to each other by linkages (e.g., phosphodiesters) or substitute linkages.

(253) In its broadest sense, the term substantially complementary, when used herein with respect to a nucleotide sequence in relation to a reference or target nucleotide sequence, means a nucleotide sequence having a percentage of identity between the substantially complementary nucleotide sequence and the exact complementary sequence of said reference or target nucleotide sequence of at least 60%, at least 70%, at least 80% or 85%, at least 90%, at least 93%, at least 95% or 96%, at least 97% or 98%, at least 99% or 100% (the later being equivalent to the term identical in this context). For example, identity is assessed over a length of at least 10 nucleotides, or at least 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 or up to 50 nucleotides of the entire length of the nucleic acid sequence to said reference sequence (if not specified otherwise below). Sequence comparisons are carried out using default GAP analysis with the University of Wisconsin GCG, SEQWEB application of GAP, based on the algorithm of Needleman and Wunsch (Needleman and Wunsch (1970) J. Mol. Biol. 48: 443-453; as defined above). A nucleotide sequence substantially complementary to a reference nucleotide sequence hybridizes to the reference nucleotide sequence under low stringency conditions, preferably medium stringency conditions, most preferably high stringency conditions (as defined above).

(254) In its broadest sense, the term substantially identical, when used herein with respect to a nucleotide sequence, means a nucleotide sequence corresponding to a reference or target nucleotide sequence, wherein the percentage of identity between the substantially identical nucleotide sequence and the reference or target nucleotide sequence is at least 60%, at least 70%, at least 80% or 85%, at least 90%, at least 93%, at least 95% or 96%, at least 97% or 98%, at least 99% or 100% (the later being equivalent to the term identical in this context). For example, identity is assessed over a length of 10-22 nucleotides, such as at least 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 or up to 50 nucleotides of a nucleic acid sequence to said reference sequence (if not specified otherwise below). Sequence comparisons are carried out using default GAP analysis with the University of Wisconsin GCG, SEQWEB application of GAP, based on the algorithm of Needleman and Wunsch (Needleman and Wunsch (1970) J. Mol. Biol. 48: 443-453; as defined above). A nucleotide sequence that is substantially identical to a reference nucleotide sequence hybridizes to the exact complementary sequence of the reference nucleotide sequence (i.e. its corresponding strand in a double-stranded molecule) under low stringency conditions, preferably medium stringency conditions, most preferably high stringency conditions (as defined above). Homologues of a specific nucleotide sequence include nucleotide sequences that encode an amino acid sequence that is at least 24% identical, at least 35% identical, at least 50% identical, at least 65% identical to the reference amino acid sequence, as measured using the parameters described above, wherein the amino acid sequence encoded by the homolog has the same biological activity as the protein encoded by the specific nucleotide. The term substantially non-identical refers to a nucleotide sequence that does not hybridize to the nucleic acid sequence under stringent conditions.

(255) As used herein, the term gene refers to a nucleic acid sequence comprising an open reading frame encoding a polypeptide, including both exon and (optionally) intron sequences. A gene refers to coding sequence of a gene product, as well as non-coding regions of the gene product, including 5UTR and 3UTR regions, introns and the promoter of the gene product. These definitions generally refer to a single-stranded molecule, but in specific embodiments will also encompass an additional strand that is partially, substantially or fully complementary to the single-stranded molecule. Thus, a nucleic acid sequence can encompass a double-stranded molecule or a double-stranded molecule that comprises one or more complementary strand(s) or complement(s) of a particular sequence comprising a molecule. As used herein, a single stranded nucleic acid can be denoted by the prefix ss, a double stranded nucleic acid by the prefix ds, and a triple stranded nucleic acid by the prefix ts.

(256) The term operable linkage or operably linked are used interchangeably herein, are to be understood as meaning, for example, the sequential arrangement of a regulatory element (e.g. a promoter) with a nucleic acid sequence to be expressed and, if appropriate, further regulatory elements (such as, e.g., a terminator) in such a way that each of the regulatory elements can fulfill its intended function to allow, modify, facilitate or otherwise influence expression of the linked nucleic acid sequence. The expression may result depending on the arrangement of the nucleic acid sequences in relation to sense or antisense RNA. To this end, direct linkage in the chemical sense is not necessarily required. Genetic control sequences such as, for example, enhancer sequences, can also exert their function on the target sequence from positions which are further away, or indeed from other DNA molecules. In some embodiments, arrangements are those in which the nucleic acid sequence to be expressed recombinantly is positioned behind the sequence acting as promoter, so that the two sequences are linked covalently to each other. The distance between the promoter sequence and the nucleic acid sequence to be expressed recombinantly can be any distance, and in some embodiments is less than 200 base pairs, especially less than 100 base pairs, less than 50 base pairs. In some embodiments, the nucleic acid sequence to be transcribed is located behind the promoter in such a way that the transcription start is identical with the desired beginning of the chimeric RNA of the invention. Operable linkage, and an expression construct, can be generated by means of customary recombination and cloning techniques as described (e.g., in Maniatis T, Fritsch E F and Sambrook J (1989) Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory, Cold Spring Harbor (N.Y.); Silhavy et al. (1984) Experiments with Gene Fusions, Cold Spring Harbor Laboratory, Cold Spring Harbor (N.Y.); Ausubel et al. (1987) Current Protocols in Molecular Biology, Greene Publishing Assoc and Wiley Interscience; Gelvin et al. (Eds) (1990) Plant Molecular Biology Manual; Kluwer Academic Publisher, Dordrecht, The Netherlands). However, further sequences may also be positioned between the two sequences. The insertion of sequences may also lead to the expression of fusion proteins, or serves as ribosome binding sites. In some embodiments, the expression construct, consisting of a linkage of promoter and nucleic acid sequence to be expressed, can exist in a vector integrated form and be inserted into a plant genome, for example by transformation.

(257) The terms promoter, promoter element, or promoter sequence are equivalents and as used herein, refers to a DNA sequence which when operatively linked to a nucleotide sequence of interest is capable of controlling the transcription of the nucleotide sequence of interest into mRNA. A promoter is typically, though not necessarily, located 5 (i.e., upstream) of a nucleotide sequence of interest (e.g., proximal to the transcriptional start site of a structural gene) whose transcription into mRNA it controls, and provides a site for specific binding by RNA polymerase and other transcription factors for initiation of transcription. A polynucleotide sequence is heterologous to an organism or a second polynucleotide sequence if it originates from a foreign species, or, if from the same species, is modified from its original form. For example, a promoter operably linked to a heterologous coding sequence refers to a coding sequence from a species different from that from which the promoter was derived, or, if from the same species, a coding sequence which is not naturally associated with the promoter (e.g. a genetically engineered coding sequence or an allele from a different ecotype or variety). Suitable promoters can be derived from genes of the host cells where expression should occur or from pathogens for the host cells (e.g., tissue promoters or pathogens like viruses).

(258) If a promoter is an inducible promoter, as defined herein, then the rate of transcription is modified in response to an inducing agent or inducer. In contrast, the rate of transcription is not regulated by an inducer if the promoter is a constitutive promoter. The term constitutive when made in reference to a promoter means that the promoter is capable of directing transcription of an operably linked nucleic acid sequence in the absence of a stimulus (e.g., heat shock, chemicals, agents, light, etc.). Typically, constitutive promoters are capable of directing expression of a nucleic acid sequence in substantially any cell and any tissue. In contrast, the term regulateable or inducible promoter referred to herein is one which is capable of directing a level of transcription of an operably linked nucleic acid sequence in the presence of a stimulus (e.g., heat shock, chemicals, light, agent etc.) which is different from the level of transcription of the operably linked nucleic acid sequence in the absence of the stimulus.

(259) A promoter may be regulated in a tissue-specific or tissue preferred manner such that it is only active in transcribing the associated coding region in a specific tissue type(s). The term tissue specific as it applies to a promoter refers to a promoter that is capable of directing selective expression of a nucleotide sequence of interest to a specific type of tissue (e.g., liver) in the relative absence of expression of the same nucleotide sequence of interest in a different type of tissue (e.g., kidney). Tissue specificity of a promoter may be evaluated by, for example, operably linking a reporter gene to the promoter sequence to generate a reporter construct, introducing the reporter construct into the genome of an organism, e.g. an animal model such that the reporter construct is integrated into every tissue of the resulting transgenic animal, and detecting the expression of the reporter gene (e.g., detecting mRNA, protein, or the activity of a protein encoded by the reporter gene) in different tissues of the transgenic animal. The detection of a greater level of expression of the reporter gene in one or more tissues relative to the level of expression of the reporter gene in other tissues shows that the promoter is specific for the tissues in which greater levels of expression are detected. The term cell type specific as applied to a promoter refers to a promoter, which is capable of directing selective expression of a nucleotide sequence of interest in a specific type of cell in the relative absence of expression of the same nucleotide sequence of interest in a different type of cell within the same tissue. The term cell type specific when applied to a promoter also means a promoter capable of promoting selective expression of a nucleotide sequence of interest in a region within a single tissue. Cell type specificity of a promoter may be assessed using methods well known in the art, e.g., GUS activity staining or immunohistochemical staining. The term minimal promoter as used herein refers to the minimal nucleic acid sequence comprising a promoter element while also maintaining a functional promoter. A minimal promoter may comprise an inducible, constitutive or tissue-specific promoter.

(260) The term expression as used herein refers to the biosynthesis of a gene product, preferably to the transcription and/or translation of a nucleotide sequence, for example an endogenous gene or a heterologous gene, in a cell. For example, in the case of a heterologous nucleic acid sequence, expression involves transcription of the heterologous nucleic acid sequence into mRNA and, optionally, the subsequent translation of mRNA into one or more polypeptides. Expression also refers to biosynthesis of an RNAi molecule, which refers to expression and transcription of an RNAi agent such as siRNA, shRNA, and antisense DNA but does not require translation to polypeptide sequences. The term expression construct and nucleic acid construct as used herein are synonyms and refer to a nucleic acid sequence capable of directing the expression of a particular nucleotide sequence, such as the heterologous target gene sequence in an appropriate host cell (e.g., a prokaryotic cell, eukaryotic cell, or mammalian cell). If translation of the desired heterologous target gene is required, it also typically comprises sequences required for proper translation of the nucleotide sequence. The coding region may code for a protein of interest but may also code for a functional RNA of interest, for example antisense RNA, dsRNA, or a nontranslated RNA, in the sense or antisense direction. The nucleic acid construct as disclosed herein can be chimeric, meaning that at least one of its components is heterologous with respect to at least one of its other components.

(261) The term leakiness or leaky as used in reference to promoter leakiness refers to some level of expression of the nucleic acid sequence which is operatively linked to the promoter, even when the promoter is not intended to result in expression of the nucleic acid sequence (i.e. when the promoter is in the off state, a background level of expression of the nucleic acid sequence which is operatively linked to such promoter exists). In one illustrative example using inducible promoters, for example a Tet-on promoter, a leaky promoter is where some level of the nucleic acid sequence expression (which is operatively linked to the Tet-on promoter) still occurs in the absence of the inducer agent, tetracycline. Typically, most inducible promoters and tissue-specific promoters have approximately 10%-30% or 10-20% unintended or background nucleic acid sequence expression when the promoter is not active, for example, the background of leakiness of nucleic acid sequence expression is about 10%-20% or about 10-30%. As an illustrative example using a tissue-specific promoter, a leaky promoter is one in which expression of the nucleic acid sequence occurs in tissue where a tissue-specific promoter is not active, i.e. expression occurs in a non-specific tissue. Stated in another way using a kidney-specific promoter as an example; if at least some level of the nucleic acid sequence expression occurs in at least one tissue other than the kidney, where the nucleic acid sequence is operably linked to a kidney specific promoter, the kidney specific promoter would be considered a leaky promoter

(262) The term enhancer refers to a cis-acting regulatory sequence involved in the transcriptional activation of a nucleic acid sequence. An enhancer can function in either orientation and can be upstream or downstream of the promoter. As used herein, the term gene product(s) is used to refer to include RNA transcribed from a gene, or a polypeptide encoded by a gene or translated from RNA. A protein and/or peptide or fragment thereof can be any protein of interest, for example, but not limited to; mutated proteins; therapeutic proteins; truncated proteins, wherein the protein is normally absent or expressed at lower levels in the cell. Proteins can also be selected from a group comprising; mutated proteins, genetically engineered proteins, peptides, synthetic peptides, recombinant proteins, chimeric proteins, antibodies, midibodies, tribodies, humanized proteins, humanized antibodies, chimeric antibodies, modified proteins and fragments thereof.

(263) The term nucleic acid construct as used herein refers to a nucleic acid at least partly created by recombinant methods. The term DNA construct refers to a polynucleotide construct consisting of deoxyribonucleotides. The construct can be single or double stranded. The construct can be circular or linear. A person of ordinary skill in the art is familiar with a variety of ways to obtain and generate a DNA construct. Constructs can be prepared by means of customary recombination and cloning techniques as are described, for example, in Maniatis T, Fritsch E F and Sambrook J (1989) Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory, Cold Spring Harbor (N.Y.); Silhavy et al. (1984) Experiments with Gene Fusions, Cold Spring Harbor Laboratory, Cold Spring Harbor (N.Y.); Ausubel et al. (1987) Current Protocols in Molecular Biology, Greene Publishing Assoc and Wiley Interscience; Gelvin et al. (Eds) (1990) Plant Molecular Biology Manual; Kluwer Academic Publisher, Dordrecht, The Netherlands.

(264) The terms polypeptide, peptide, oligopeptide, polypeptide, gene product, expression product and protein are used interchangeably herein to refer to a polymer or oligomer of consecutive amino acid residues.

(265) As used herein, the term comprising means that other elements can also be present in addition to the defined elements presented. The use of comprising indicates inclusion rather than limitation. Accordingly, the terms comprising means including principally, but not necessary solely. Furthermore, variation of the word comprising, such as comprise and comprises, have correspondingly the same meanings. The term consisting essentially of means including principally, but not necessary solely at least one, and as such, is intended to mean a selection of one or more, and in any combination. Stated another way, the term consisting essentially of means that an element can be added, subtracted or substituted without materially affecting the novel characteristics of the invention. This applies equally to steps within a described method as well as compositions and components therein. In other embodiments, the inventions, compositions, methods, and respective components thereof, described herein are intended to be exclusive of any element not deemed an essential element to the component, composition or method (consisting of). For example, an engineered genetic counter that comprises a sequence encoding a recombinase and a recombinase recognition sequence encompasses both the recombinase and a recombinase recognition sequence of a larger sequence. By way of further example, a composition that comprises elements A and B also encompasses a composition consisting of A, B and C.

(266) As used in this specification and the appended claims, the singular forms a, an, and the include plural references unless the context clearly dictates otherwise. Thus for example, references to the method includes one or more methods, and/or steps of the type described herein and/or which will become apparent to those persons skilled in the art upon reading this disclosure and so forth.

(267) It is understood that the foregoing detailed description and the following examples are illustrative only and are not to be taken as limitations upon the scope of the invention. Various changes and modifications to the disclosed embodiments, which will be apparent to those of skill in the art, may be made without departing from the spirit and scope of the present invention. Further, all patents, patent applications, publications, and websites identified are expressly incorporated herein by reference for the purpose of describing and disclosing, for example, the methodologies described in such publications that might be used in connection with the present invention. These publications are provided solely for their disclosure prior to the filing date of the present application. Nothing in this regard should be construed as an admission that the inventors are not entitled to antedate such disclosure by virtue of prior invention or for any other reason. All statements as to the date or representation as to the contents of these documents are based on the information available to the applicants and do not constitute any admission as to the correctness of the dates or contents of these documents.

(268) The present invention can be defined in any of the following numbered paragraphs: 1. A single invertase memory module (SIMM) comprising a forward recombinase recognition site (RRS.sub.for), an inverted promoter sequence (iP.sub.inv), a recombinase sequence (RC) and a reverse recombinase recognition site (RRS.sub.rev), [RRS.sub.for-iP.sub.inv-RC-RRS.sub.rev], where the recombinase encoded by the recombinase sequence is specific for the forward and reverse recombination recognition sites. 2. The single invertase memory module of paragraph 1, further comprising a ribosome binding site (RBS). 3. The single invertase memory module of any of the preceding paragraphs, further comprising a transcriptional terminator sequence (T). 4. The single invertase memory module of any of the preceding paragraphs, further comprising a protein degradation tag sequence (D). 5. The single invertase memory module of any of the preceding paragraphs, further comprising a ribosome binding site (RBS) and a transcriptional terminator sequence (T). 6. The single invertase memory module of any of the preceding paragraphs, further comprising a ribosome binding site (RBS) and a protein degradation tag sequence (D). 7. The single invertase memory module of any of the preceding paragraphs, further comprising a protein degradation tag sequence (D) and a transcriptional terminator sequence (T). 8. The single invertase memory module of any of the preceding paragraphs, further comprising a ribosome binding site (RBS), a protein degradation tag sequence (D), and a transcriptional terminator sequence (T). 9. The single invertase memory module of any of the preceding paragraphs, further comprising an output nucleic acid sequence encoding an output product. 10. The single invertase memory module of any of the preceding paragraphs, wherein the output product is a reporter protein, a transcriptional repressor, a transcriptional activator, a selection marker, an enzyme, a receptor protein, a ligand protein, an RNA, a riboswitch or a short-hairpin RNA. 11. A single-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), at least one single invertase memory module (SIMM), and an output nucleic acid sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the single-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev].sub.n-OP, wherein iP.sub.A and the iP.sub.1 of each SIMM are responsive to the same inducer, wherein the recombinase encoded by each at least one SIMM is specific for the forward and reverse recombinase recognition site of that SIMM, and wherein n is an integer value 1. 12. The single-inducer engineered genetic counter of paragraph 11, wherein the recombinase encoded by each at least one SIMM is a different recombinase from each other SIMM. 13. The single-inducer engineered genetic counter of paragraph 11 or 12, further comprising an inverted promoter sequence downstream of the reverse recombination recognition site of at least one SIMM. 14. The single-inducer engineered genetic counter of any of paragraphs 11-13, further comprising an output nucleic acid sequence encoding an output product downstream of the recombinase sequence of at least one SIMM. 15. The single-inducer engineered genetic counter of any of paragraphs 11-14, further comprising an inverted output nucleic acid sequence encoding an output product downstream of the transcriptional terminator sequence of at least one SIMM. 16. A multiple-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), at least one single invertase memory module (SIMM), and an output nucleic sequence encoding an output product (OP), where each at least one SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the multiple-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev].sub.n-OP, wherein iP.sub.A and the iP.sub.1 of at least one SIMM are responsive to different inducers from each other, wherein the recombinase encoded by each at least one SIMM is specific for the forward and reverse recombinase recognition site of that SIMM, and wherein n is an integer value1. 17. The multiple-inducer engineered genetic counter of paragraph 16, wherein the recombinase encoded by each at least one SIMM is a different recombinase from each other SIMM. 18. The multiple-inducer engineered genetic counter of paragraphs 16 or 17, further comprising an inverted promoter sequence downstream of the reverse recombination recognition site of at least one SIMM. 19. The multiple-inducer engineered genetic counter of any of paragraphs 16-18, further comprising an output nucleic acid sequence encoding an output product downstream of the recombinase sequence of at least one SIMM. 20. The multiple-inducer engineered genetic counter of paragraphs 16-19, further comprising an inverted output nucleic acid sequence encoding an output product downstream of the transcriptional terminator sequence of at least one SIMM. 21. The engineered genetic counter of any of paragraphs 11-20, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of at least one SIMM comprise a Cre recombinase sequence of SEQ ID NO: 1002, and LoxP recombinase recognition sites comprising the sequences of SEQ ID NO:1 and SEQ ID NO:2. 22. The engineered genetic counter of any of paragraphs 11-21, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a Flp recombinase sequence of SEQ ID NO:3 or SEQ ID NO:1002 and FRT recombinase recognition sites comprising the sequence of SEQ ID NO: 4. 23. The engineered genetic counter of any of paragraphs 11-22, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a Flp recombinase sequence of SEQ ID NO:3 or SEQ ID NO:1002 and FRT recombinase recognition sites comprising the sequence of SEQ ID NO: 5. 24. The engineered genetic counter of any of paragraphs 11-23, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a FimB recombinase of SEQ ID NO: 9 and recombinase recognition sites comprising the sequence of SEQ ID NO: 7 and SEQ ID NO: 8. 25. The engineered genetic counter of any of paragraphs 11-24, wherein the recombinase sequence and the forward and reverse recombinase recognition sites of one SIMM comprise a FimE recombinase of SEQ ID NO: 10 and recombinase recognition sites comprising the sequence of SEQ ID NO: 7 and SEQ ID NO: 8 respectively. 26. The engineered genetic counter of any of paragraphs 11-25, wherein the recombinase sequence of one SIMM comprises a Cre recombinase of SEQ ID NO: 1002, and the LoxP recombinase recognition sites of that SIMM comprise a sequence selected from the group consisting of SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, and SEQ ID NO: 17. 27. The engineered genetic counter of any of paragraphs 11-26, wherein at least one inducible promoter comprises a sequence selected from the group consisting of a P.sub.LtetO-1 promoter of SEQ ID NO: 33, a P.sub.BAD promoter of SEQ ID NO: 34, a P.sub.Trc-2 promoter of SEQ ID NO: 35, a P.sub.LlacO-1 promoter of SEQ ID NO: 36, a P.sub.A1LacO-1 promoter of SEQ ID NO: 37, a P.sub.lac/ara-1 promoter of SEQ ID NO: 38, and a P.sub.Ls1con promoter of SEQ ID NO: 39. 28. The engineered genetic counter of any of paragraphs 11-27, wherein at least one inducible promoter comprises a sequence selected from the group consisting of SEQ ID NO: 320-SEQ ID NO: 842. 29. The engineered genetic counter of any of paragraphs 11-28, wherein the output product encoded by the output nucleic acid sequence is a reporter protein, a transcriptional repressor, a transcriptional activator, a selection marker, an enzyme, a receptor protein, a ligand protein, an RNA, a riboswitch or a short-hairpin RNA. 30. The engineered genetic counter of any of paragraphs 11-29, further comprising an RBS sequence upstream of the output nucleic acid sequence. 31. The engineered genetic counter of any of paragraphs 11-30, wherein the RBS sequence of at least one SIMM comprises a sequence that is selected from the group consisting of SEQ ID NO: 843-SEQ ID NO: 850. 32. The engineered genetic counter of any of paragraphs 11-31, wherein the RBS sequence of at least one SIMM comprises a sequence that is selected from SEQ ID NO: 851-SEQ ID NO: 994. 33. The engineered genetic counter of any of paragraphs 11-32, wherein the protein degradation tag sequence of at least one SIMM comprises a sequence that is selected from the group consisting of sequences that encode for the peptides of SEQ ID NO: 995-SEQ ID NO: 1001. 34. The engineered genetic counters of any of paragraphs 11-34, wherein n is an integer value selected from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20. 35. A single-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), one single invertase memory module (SIMM), and an output nucleic acid sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the single-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-OP, wherein iP.sub.A and iP.sub.1 are responsive to the same inducer, and wherein the recombinase encoded by the SIMM is specific for the forward and reverse recombinase recognition site of the SIMM. 36. The single-inducer engineered genetic counter of paragraph 35, wherein the inducible promoter sequences iP.sub.A and iP.sub.1 are responsive to arabinose. 37. The single-inducer engineered genetic counter of paragraph 35 or 36, wherein the inducible promoter sequences iP.sub.A and iP.sub.1 are P.sub.BAD promoter sequences. 38. The single-inducer engineered genetic counter of any of paragraphs 35-37, wherein the recombinase gene sequence (RC.sub.1) encodes a Flp recombinase and the forward (RRS.sub.for) and reverse (RRS.sub.rev) recombinase recognition sites are FRT.sub.F and FRT.sub.R sites. 39. The single-inducer engineered genetic counter of any of paragraphs 35-38, wherein the output nucleic acid sequence encodes green fluorescent protein. 40. A single-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), two single invertase memory modules (SIMMs), and an output nucleic acid sequence encoding an output product (OP), where each SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the single-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.1,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]-OP, wherein iP.sub.A and iP.sub.1 are responsive to the same inducer, and wherein the recombinase encoded by each SIMM is specific for the forward and reverse recombinase recognition site of that SIMM. 41. The single-inducer engineered genetic counter of paragraph 40, wherein the inducible promoter sequences iP.sub.A and iP.sub.1 are responsive to arabinose. 42. The single-inducer engineered genetic counter of paragraph 40 or 41, wherein the inducible promoter sequences iP.sub.A and iP.sub.1 are P.sub.BAD promoter sequences. 43. The single-inducer engineered genetic counter of any of paragraphs 40-42, wherein the recombinase gene sequence of the first SIMM (RC.sub.1) encodes a Flp recombinase and the forward (RRS.sub.1,for) and reverse (RRS.sub.1,rev) recombinase recognition sites of the first SIMM are FRT.sub.F and FRT.sub.R sites. 44. The single-inducer engineered genetic counter of any of paragraphs 40-43, wherein the recombinase gene sequence of the second SIMM (RC.sub.2) encodes a Cre recombinase and the forward (RRS.sub.2,for) and reverse (RRS.sub.2,rev) recombinase recognition sites of the second SIMM are loxP.sub.F and loxP.sub.R sites. 45. The single-inducer engineered genetic counter of any of paragraphs 40-44, wherein the output nucleic acid sequence encodes green fluorescent protein. 46. A multiple-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), one single invertase memory module (SIMM), and an output nucleic sequence encoding an output product (OP), where the SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.1,inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the multiple-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-OP, wherein iP.sub.A and the iP.sub.1 of the SIMM are responsive to different inducers from each other, and wherein the recombinase encoded by the SIMM is specific for the forward and reverse recombinase recognition site of the SIMM. 47. The multiple-inducer engineered genetic counter of paragraph 46, wherein the inducible promoter sequence iP.sub.A is responsive to anhydrotetracycline. 48. The multiple-inducer engineered genetic counter of paragraph 46 or 47, wherein the inducible promoter sequence iP.sub.1 is responsive to arabinose. 49. The multiple-inducer engineered genetic counter of any of paragraphs 46-48, wherein the inducible promoter sequence iP.sub.A is a P.sub.LtetO-1 promoter. 50. The multiple-inducer engineered genetic counter of any of paragraphs 46-49, wherein the inducible promoter sequence iP.sub.1 is a P.sub.BAD promoter. 51. The multiple-inducer engineered genetic counter of any of paragraphs 46-50, wherein the recombinase gene sequence of the SIMM (RC.sub.1) encodes a Flp recombinase and the forward (RRS.sub.1,for) and reverse (RRS.sub.1,rev) recombinase recognition sites of the SIMM are FRT.sub.F and FRT.sub.R sites. 52. The multiple-inducer engineered genetic counter of any of paragraphs 46-51, wherein the output nucleic acid sequence encodes green fluorescent protein. 53. A multiple-inducer engineered genetic counter comprising an inducible promoter sequence (iP.sub.A), two single invertase memory modules (SIMM), and an output nucleic sequence encoding an output product (OP), where each SIMM comprises a forward recombinase recognition sequence (RRS.sub.for), an inverted inducible promoter sequence (iP.sub.inv), a ribosome binding site (RBS), a recombinase gene sequence (RC), a degradation tag sequence (D), a transcriptional terminator sequence (T), and a reverse recombinase recognition sequence (RRS.sub.rev), such that the multiple-inducer engineered genetic counter comprises the following components: iP.sub.A-[RRS.sub.1,for-iP.sub.1,inv-RBS-RC.sub.1-D-T-RRS.sub.1,rev]-[RRS.sub.2,for-iP.sub.2,inv-RBS-RC.sub.2-D-T-RRS.sub.2,rev]OP, wherein iP.sub.A and the iP of at least one SIMM are responsive to different inducers from each other, and wherein the recombinase encoded by each SIMM is specific for the forward and reverse recombinase recognition site of that SIMM. 54. The multiple-inducer engineered genetic counter of paragraph 53, wherein the inducible promoter sequence iP.sub.A is responsive to anhydrotetracycline. 55. The multiple-inducer engineered genetic counter of paragraph 53 or 54, wherein the inducible promoter sequence iP.sub.1 is responsive to arabinose. 56. The multiple-inducer engineered genetic counter of any of paragraphs 53-55, wherein the inducible promoter sequence iP.sub.2 is responsive to IPTG (isopropyl--D thiogalactoside). 57. The multiple-inducer engineered genetic counter of any of paragraphs 53-56, wherein the inducible promoter sequence iP.sub.A is a P.sub.LtetO-1 promoter. 58. The multiple-inducer engineered genetic counter of any of paragraphs 53-57, wherein the inducible promoter sequence iP.sub.1 is a P.sub.BAD promoter. 59. The multiple-inducer engineered genetic counter of any of paragraphs 53-58, wherein the inducible promoter sequence iP.sub.2 is a P.sub.A1lacO-1 promoter. 60. The multiple-inducer engineered genetic counter of any of paragraphs 53-59, wherein the recombinase gene sequence of the first SIMM (RC.sub.1) encodes a Flp recombinase and the forward (RRS.sub.1,for) and reverse (RRS.sub.1,rev) recombinase recognition sites of the first SIMM are FRT.sub.F and FRT.sub.R sites. 61. The multiple-inducer engineered genetic counter of any of paragraphs 53-60, wherein the recombinase gene sequence of the second SIMM (RC.sub.2) encodes a Cre recombinase and the forward (RRS.sub.2,for) and reverse (RRS.sub.2,rev) recombinase recognition sites of the second SIMM are loxP.sub.F and loxP.sub.R sites. 62. The multiple-inducer engineered genetic counter of any of paragraphs 53-61, wherein the output nucleic acid sequence encodes green fluorescent protein. 63. The engineered genetic counter of any of paragraphs 11-62, for use in a cellular or non-cellular system in counting inputs. 64. The engineered genetic counter of paragraph 63, wherein the engineered genetic counter is introduced into a cellular or non-cellular system using a vector. 65. The engineered genetic counter of paragraph 63 or 64, wherein the vector is a bacterial artificial chromosome (BAC). 66. The engineered genetic counter of any of paragraphs 63-65, wherein the cellular system is a prokaryotic, eukaryotic, or artificial cell. 67. The engineered genetic counter of any of paragraphs 63-65, wherein the non-cellular system is a virus or bacteriophage. 68. A method for counting at least one event in a cellular system comprising introducing an engineered genetic counter of any of paragraphs 11-62 into a cellular or non-cellular system for use in counting events in the cellular or non-cellular system. 69. The method of paragraph 68, wherein the engineered genetic counter is introduced into a cellular or non-cellular system using a vector. 70. The method of paragraph 68 or 69, wherein the vector is a bacterial artificial chromosome (BAC). 71. The method of any of paragraphs 68-70, wherein the cellular system is a prokaryotic, eukaryotic, or artificial cell. 72. The method of any of paragraphs 68-70, wherein the non-cellular system is a virus or bacteriophage. 73. Any of the above-described paragraphs wherein the SIMM, the invertase memory module, the engineered genetic counter and methods of use thereof consist essentially of the specified components.

EXAMPLES

Example 1

(269) We have developed a novel circuit design using DNA recombinases to enable individual bacterial cells to count. Recombinases have been used for numerous applications, including the creation of gene knockouts and solving sorting problems (N. J. Kilby, Trends Genet. 9, 413 (December, 1993); K. A. Haynes, J Biol Eng 2, 8 (2008); T. S. Ham, Biotechnol Bioeng 94, 1 (2006); K. A. Datsenko, Proc Natl Acad Sci USA 97, 6640 (2000)).

(270) We demonstrate the ability of the counter to count from zero to three events upon exposure to chemical inducers. Our design is composed of simple, modular building blocks composed of recombinases, such as Cre and Flp, which can invert DNA in between two oppositely-oriented recognition sites, such as loxP and FRT, respectively. Each recombinase is placed downstream of an inverted promoter (P.sub.inv) followed by an upright ribosome-binding site (RBS) and a transcriptional terminator (Term). In addition, each recombinase gene is fused to an ssrA tag that causes rapid degradation of recombinase proteins in order to maintain stability of the counter (J. B. Andersen, Appl Environ Microbiol 64, 2240 (1998)). The P.sub.inv-RBS-recombinase-ssrA-Term DNA sequences (Coff) are placed between recombinase recognition sites that are oriented in opposite directions to form a single counting unit (Rf-Coff-Rr). Upon expression of the recombinase by an upstream promoter, the entire Coff sequence is inverted between the recombinase recognition sites. In this design, the Coff orientation represents a zero and the inverted P.sub.inv-RBS-recombinase-ssrA-TermDNA sequence (Con) represents a one. In the inverted orientation (Con), further expression of the recombinase is not achieved because the recombinase DNA is inverted with respect to the upstream promoter. Therefore, the Con DNA sequence is stable and avoids being flipped back to Coff. To achieve counting, these components are daisy-chained together on the Escherichia coli chromosome, with a promoter placed upstream of the first R.sub.f-C.sub.off-R.sub.r DNA sequence.

(271) To avoid loss of atomicity, we placed counting circuits on pBAC plasmids which are maintained as single-copy episomes (D. A. Wright, Nat Protoc 1, 1637 (2006)). Upon transcription of the most upstream promoter (P.sub.LtetO from R. Lutz, Nucleic Acids Res 25, 1203 (1997)), the first recombinase (Flpe from F. Buchholz, Nat Biotechnol 16, 657 (1998)) is expressed and inverts the DNA located between its cognate recombinase sites. This converts R.sub.f-C.sub.off-R.sub.r to R.sub.f-C.sub.on-R.sub.r and halts further transcription of that same recombinase because there is no active promoter upstream of the R.sub.f-C.sub.on-R.sub.r sequence. This first inversion event results in a logical transition from zero to one. Inversion brings the inverted promoter of C.sub.off, into the upright orientation. For example, inversion of FRT.sub.f-P.sub.BADinv-RBS-flpe-ssrA-Term-FRT.sub.r produces a forward-facing p.sub.BAD promoter that is able to drive expression of the next stage. Transcription from this promoter can thus invert the downstream R.sub.f-C.sub.off-R.sub.r, resulting in another transition. To monitor successful counting, an RBS followed by a green fluorescent protein gene (gfp) was placed downstream of the last R.sub.f-C.sub.off-R.sub.r module. Thus, green fluorescence should only be detected when the last R.sub.f-C.sub.off-R.sub.r module is inverted and the appropriate inducer is added to activate the last promoter, which should only be true when the circuit has counted to its maximum. Because there are >100 identified recombinases, our design is readily extendible to count in a modular fashion to higher numbers (A. C. Groth, J Mol Biol 335, 667 (2004)). Recombinases can also be mutagenized to have altered site preferences or thermostabilities, allowing for increased diversity to create our synthetic gene circuits (F. Buchholz, Nat Biotechnol 16, 657 (1998); M. Hartung, J Biol Chem 273, 22884 (1998); S. W. Santoro, Proc Natl Acad Sci USA 99, 4185 (2002)).

(272) To test the modularity and functionality of the genetic counter, we designed a two-stage counter with P.sub.LtetO-FRT.sub.f-P.sub.BAD,inv-RBS-flpe-ssrA-Term-FRT.sub.r-RBS-gfp on a pBAC plasmid. Without any inducers, GFP fluorescence was minimal. When transcription from P.sub.LtetO was induced with 400 ng/mL anhydrotetracycline, Flp.sub.e was expressed, resulting in an inversion event and resultant DNA containing P.sub.LtetO-FRT.sub.f-Term.sub.inv-flp.sub.e,inv-ssrA-RBS-inv-p.sub.BAD-FRT.sub.r-RBS-gfp. Upon addition of arabinose, GFP fluorescence was induced, demonstrating that the circuit is able to count to two, where two is defined as anhydrotetracycline (aTc) followed by arabinose. Note that the addition of aTc alone, arabinose alone, or arabinose followed by aTc produced no GFP output.

(273) We tested the ability to count from zero to three by placing loxP.sub.f-P.sub.A1lacOinv-RBS-cre-ssrA-Term-loxP.sub.r-RBS-gfp downstream of P.sub.LtetO-FRT.sub.f-P.sub.BADinv-RBS-flp.sub.e-ssrA-Term-FRT.sub.r. In the presence of aTc and arabinose followed by IPTG, the circuit counted to three and therefore expressed a high GFP fluorescence. In the presence of no inducer, aTc alone, arabinose alone, or IPTG alone, the circuit did not count to three and had a low fluorescence. In the presence of aTc followed by arabinose, aTc followed by IPTG, and arabinose followed by IPTG, the circuit did not count to three and had a low fluorescence. These results demonstrate that the counter can count events in a defined order and is not activated by any unintended sequence of inputs.

(274) In order to make the genetic counter more user-friendly and allow a global reset to zero, inverted promoters could be placed in between each counting unit. In the presence of an inducer, each flipped counting unit could be reset by driving expression of the recombinases with the inverted promoters. In this initial embodiment, the counter counts pulses of different inducers. However, the counter could be modified in a straightforward way to count multiple events of the same inducer by replacing all the different promoters with the same promoter.

(275) The genetic circuit described herein is a modular, daisy-chained counter built with individual counting units. In one embodiment of this design, the maximum number which can be counted is linearly proportional to the number of counting units, n. In other embodiments, this system can be readily extended with more sophisticated designs to count in binary, allowing the maximum countable number to be 2.sup.n1.

(276) We designed the engineered nucleic acid-based circuits for use as genetic counters using DNA-based switches instead of protein-based systems for several reasons. An example of protein-based memory which could be cascaded to create a counter is the toggle switch (T. S. Gardner, Nature 403, 339 (2000)). The toggle switch requires well-characterized repressors to work properly and is thus more complicated than the design presented herein. Each of the individual counting units requires only a single recombinase whereas protein-based switches utilize two proteins (T. S. Gardner, Nature 403, 339 (2000)). The DNA-based design can be extended readily in a modular fashion with currently known components. Furthermore, the DNA-based system can be used across long time scales without needing to maintain active transcription and translation of the circuit because the circuit is stable in the absence of inducers.

(277) In one embodiment, the design is a cis-based counting system that requires physical proximity of individual counting units for counting transitions. In other embodiments, further functionality, including digital-logic-based computation, is incorporated by adding trans-acting components for coupling to other circuits (K. Rinaudo, Nat Biotechnol 25, 795 (2007)). In a non-limiting example, the gfp output gene can be replaced by other proteins, such as transcription factors, transcriptional repressors, or RNAs, such as riboswitches in prokaryotic and mammalian cells as well as short-hairpin RNAs in mammalian cells (F. J. Isaacs, Nat Biotechnol 22, 841 (2004)). In other embodiments, the counter can be coupled to quorum-sensing circuits to create a consensus-based counting system.

(278) The ability to count inputs in individual cells can be useful for engineering biological organisms and performing basic scientific experiments. For example, in some embodiments, engineered bacteria can be designed to count exposures to environmental agents and trigger an output only when a discrete threshold has been reached. A yeast cell-cycle counter has been developed to facilitate cell-cycle research (C. M. Ajo-Franklin, Genes Dev 21, 2271 (2007)). Mammalian cells that carry counters can help elucidate the sequence and number of mutations needed to produce cancer cells.

(279) One strength of our design lies in its simplicity, modularity, and extensibility with different recombinase proteins. Therefore, it can be used in different designs to create basic digital logic in cells. For example, in one embodiment, the counter described herein is essentially an AND gate that enforces a particular sequence of inputs. The individual modular units used in the genetic counter can be decoupled to each represent a single bit in an engineered memory system rather than a counter. A pulse generator for the generation of transcriptional pulses can also be readily designed by modifying individual modular units to perform inversion events continuously.

(280) One issue with counters which utilize transcription as an input is that they will not be able to easily distinguish between one pulse and multiple separate pulses. For example, if the counter is modified so it works with a single promoter, such as P.sub.BAD, which is arabinose-inducible, then a long single pulse will eventually flip all of the stages in the counter and result in an output. Three separate pulses may cause the same effect as well. The main reason for this issue is that circuits which use transcription to generate proteins to perform counting (such as a recombinase protein to flip a DNA sequence) respond to pulse duration rather than the transition from no inducer to inducer present.

(281) In order to allow counters to recognize edge transitions, or binary operations, such as 0 to 1 or 1 to 0, a circuit has been developed, that can be placed into cells along with a counting circuit. Essentially, the synthetic pulse generator created allows a burst of transcription to take place before shutting down all transcription, thus allowing step transitions in inducer level to produce pulses of transcription rather than constant transcription. The synthetic pulse generator is composed of an inducible promoter that is the same promoter the counter circuit uses. Some non-limiting examples of promoters include P.sub.BAD, P.sub.LtetO, and P.sub.A1lacO, or, alternatively, whatever synthetic circuit one wants to generate pulses of transcription for. This promoter drives expression of a repressor that suppresses its own transcription, thus forming a negative-feedback loop. For optimal performance, in one embodiment, the repressor is a non-inducible repressor.

(282) Upon addition of the appropriate inducer, the synthetic counter circuit begins to transcribe its genes. However, at the same time, the synthetic pulse generator produces repressor protein that suppresses transcription from the inducible promoters in the synthetic pulse generator or the synthetic counter. Eventually, enough repressor protein is produced that transcription from the inducible promoters is shut down, even in the presence of inducer. In one embodiment, a non-inducible repressor is used such that the shutting down of transcription is absolute. In a non-limiting example, non-inducible AraC proteins have been created (Mutational Analysis of Residue Roles in AraC Function, Jennifer J. Ross, Urszula Gryczynski and Robert Schleif, J. Mol. Biol. (2003) 328, 85-93) and (Hemiplegic Mutations in AraC Protein, Wendy L. Reed and Robert F. Schleif, J. Mol. Biol. (1999) 294, 417-425). These non-inducible AraC proteins could be used in the synthetic pulse generator with inducible promoter P.sub.BAD. Non-inducible versions of TetR and LacI are also available.

(283) Eventually, the inducer is withdrawn and the repressor protein degraded in order to allow transcription from the inducible promoters during the next addition of inducer. This therefore generates pulses of transcription from the inducible promoters and requires that inducer be withdrawn for additional pulses to be generated. Thus, this circuit is a synthetic pulse generator that can work with a broad range of other synthetic circuits to provide pulse generation and edge detection.

Example 2

(284) Synthetic gene networks can be constructed to emulate digital circuits and devices, giving one the ability to program and design cells with some of the principles of modern computing. A counter is one such device that results in a new type of memory and allows for complex synthetic programming and novel behaviors. Here, we describe two complementary synthetic genetic counters in E. coli that can count multiple induction events, shown herein for three events, the first comprised of a riboregulated transcriptional cascade and the second of a recombinase-based cascade of memory units. The modularity of these devices permit counting of varied user-defined inputs over a range of frequencies and their open-ended architectures provide potent biotechnology platforms for counting higher numbers.

(285) A counter is a device that retains memory of events or objects, representing each number of such as a distinct state. A key component in digital circuits and computing, counters can also be useful for cells, which often must have accurate accounting of tightly controlled processes or biomolecules in order to effectively maintain metabolism and growth. Counting mechanisms have been reportedly found in telomere length regulation (S. Marcand et al., Science 275, 986 (1997); A. Ray and K. W. Runge, Mol Cell Biol 19, 31 (1999) and cell aggregation (D. A. Brock, R. H. Gomer, Genes Dev 13, 1960 (1999)), but these system behaviors appear to be the result of a thresholding effect in which some critical molecule number or density must be reached for the observed phenotypic change.

(286) The first type of counter we developed, termed the Riboregulated Transcriptional Cascade (RTC) Counter, is based on a transcriptional cascade with additional translational regulation. The RTC counters represent each number with a unique expression profile, truly counting their inputs, and we have illustrated two such cascades that can count up to 2 and 3, respectively. For the RTC 2-Counter, the constitutive promoter P.sub.Ltet0-1 drives transcription of T7 RNA polymerase (RNAP), whose protein binds the T7 promoter and transcribes the downstream gene, in this case Green Fluorescent Protein (GFP) (B. P. Cormack et al., Gene 173, 33 (1996)). Both genes are additionally regulated by riboregulators (F. J. Isaacs et al., Nat Biotechnol 22, 841 (2004)), whose cis and trans elements silence and activate post-transcriptional gene expression, respectively. The cis-repressor sequence is placed between the transcription start site and the ribosome binding site (RBS), and its complementarity with the RBS causes a stem-loop structure to form upon transcription. This secondary structure prevents binding of the RBS by the 30S ribosomal subunit, inhibiting translation. A short, trans-activating, noncoding RNA (taRNA) driven by the arabinose promoter P.sub.BAD binds to the cis-repressor in trans, relieving RBS repression and allowing translation. With this riboregulation, each node in the cascade requires both independent transcription and translation for protein expression and is thus AND-gated. This cascade is able to count brief arabinose pulses by expressing a new protein species in response to each pulse. With cis-repressed T7 RNAP mRNAs in the cell, the first pulse of arabinose drives a short burst of taRNA production and consequently expression of T7 RNAP proteins. At the end of the pulse, arabinose is removed from the cell environment, intracellular arabinose and taRNA are metabolized, and expression of protein halts. The T7 RNAP proteins that have been made go on to transcribe cis-repressed GFP transcripts, but few GFP proteins are made until the next arabinose pulse is delivered and translation is once again fully activated.

(287) We built the RTC 2-Counter construct on a high copy plasmid and transformed it into E. coli strain K-12pro. Cells containing this construct were pulsed with inducer, and mean fluorescence over time was measured. As expected, uninduced cells show no increase in mean fluorescence while cells that received either the first or second pulse show only small increases, indicating some degree of leakagean effect in which the intended protein is expressed in each arabinose pulse but also some unintended, downstream proteins are expressed as well. Cells that received both arabinose pulses show a significant increase in fluorescence when the second pulse is delivered, precisely when the cells are expected to express GFP proteins. With concentrations of GFP protein switching from low to high as a result of a second pulse, we represent the number 2 in this case with GFP protein.

(288) To extend the RTC counter's capability to count to three, we built a second synthetic construct, the RTC 3-Counter, again with GFP as the quantitative readout. It is similar to the RTC 2-Counter but has three nodes in the cascade instead of two. T7 RNAP is the gene at the first node driving transcription of T3 RNAP, which in turn drives transcription of GFP. All transcripts are likewise cis-repressed with the same riboregulator sequence. When pulsed with arabinose, this counter primarily produces T7 RNAP proteins during the first pulse, T3 RNAP proteins during the second pulse, and GFP proteins during the third pulse.

(289) Our experimental results demonstrate that fluorescence increases substantially only when all three arabinose pulses are delivered. Flow cytometry measurements show this increase beginning at precisely the time of the third pulse, and the considerable slope at this juncture suggests that cells contain a high concentration of cis-repressed GFP transcripts ready for trans-activation. The data also reveal slight leakage in cells that are pulsed only once or twice, but their fluorescence remains comparatively low. This result, in combination with the RTC 2-Counter evidence, shows that the temporal progression of RNA and protein species logically predicted by our counter network architecture design is indeed responsible for the observed effect.

(290) To further support these results, we constructed and analyzed a mathematical model based on the design of the RTC 2-Counter and 3-Counter constructs. This model, with fitted parameters, was able to match both the RTC 2-Counter and 3-Counter experimental results. We used the model to investigate the effects of pulse frequency and pulse length on the performance of the RTC 3-Counter and guide our experimental search for optimal combinations. The mathematical model predictions, shown as contour lines, indicate that maximum expression occurs with pulse lengths of approximately 20 to 30 minutes and pulse intervals of 10 to 40 minutes. The absolute difference in fluorescence after three pulses and two pulses is described, with optimal counting behavior requiring similar pulse length and interval combinations noted above.

(291) Experimentally, we sampled various pulse lengths and intervals, plotting these results as circles. These results are consistent with the model predictions across a wide range of temporal conditions, and confirm that the RTC 3-Counter has a sizeable temporal region in which its counting behavior is robust. Within this region, the counter is also capable of counting irregular pulses; for example, it is able to distinguish between two short pulses followed by a long pulse and two long pulses, as predicted by the model. However, when pulse length or frequency is either too high or low the RTC 3-Counter is unable to count properly due to the intrinsic kinetic limits of the biochemical processes involved, such as transcription and mRNA degradation.

(292) Our second counter design, termed the DNA Invertase Cascade (DIC) Counter, is built by daisy-chaining modular DNA-based counting units (FIG. 1A). The DIC Counter utilizes recombinases, such as cre and flp.sub.e F. Buchholz, et al., Nat Biotechnol 16, 657 (1998)), which can invert DNA between two oppositely-oriented cognate recognition sites, such as loxP and FRT, respectively.

(293) Recombinases have been used for numerous applications, including the creation of gene knockouts, solving sorting problems, and constructing inheritable genetic memory (A. C. Groth, M. P. Calos, J Mol Biol 335, 667 (2004); T. S. Ham, et al., Biotechnol Bioeng 94, 1 (2006); and K. A. Haynes et al., J Biol Eng 2, 8 (2008)). In our counter design, each recombinase gene (rec) is downstream of an inverted promoter (P.sub.inv), fused to an ssrA-based tag that causes rapid protein degradation (J. B. Andersen et al., Appl Environ Microbiol 64, 2240 (1998)), and followed by a transcriptional terminator (Term) (FIG. 1A, FIG. 2A, and FIG. 3). The P.sub.inv-rec-ssrA-Term DNA sequences are placed between recombinase recognition sites (R.sub.f and R.sub.r), forming a single counting unit which we have named a Single Invertase Memory Module (SIMM) (FIG. 1A and FIG. 3). Upon expression of recombinase by an upstream promoter, the entire SIMM is inverted between the recognition sites, representing the flipping of a digital bit. Due to the inverted orientation of the recombinase gene with respect to the upstream promoter, further expression of recombinase protein ceases and DNA orientation is fixed.

(294) To maximize the atomicity of DNA inversion events, we placed our counting circuits on pBAC plasmids that are maintained as single-copy episomes (D. A. Wright et al., Nat Protoc 1, 1637 (2006)). We developed a single-inducer DIC 2-Counter (FIG. 4) and 3-Counter (FIG. 1A and FIG. 5), which are composed of one and two SIMMs, respectively. These circuits utilize P.sub.BAD so that pulses of arabinose constitute inputs to the circuit. Each pulse of arabinose results in promoter activation and expression of the next recombinase in the cascade, which then inverts the SIMM in which it is located. This allows the inverted promoter contained within that SIMM to be placed in an upright orientation to drive expression of the next SIMM stage. The single-inducer DIC 2-Counter shows high GFP output after two pulses of arabinose and only low GFP output after one pulse of arabinose, demonstrating that a single SIMM can be inverted to count events (FIG. 6). In the single-inducer DIC 3-Counter, some premature flipping of the cre-based SIMM did occur, resulting in a small amount of leakage, e.g., fluorescence increased after only two arabinose pulses (FIG. 1B and FIG. 7). However, this leakage was small compared to the high GFP output obtained after three pulses of arabinose (FIG. 1B). In order to probe the temporal characteristics of the single-inducer DIC 3-Counter, we varied the pulse lengths and intervals, calculating the ratio of GFP output for cells exposed to three versus two pulses of arabinose (FIG. 1C). This ratio was at least 1.5 for most conditions tested, demonstrating that the single-inducer DIC 3-Counter is able to successfully count pulses whose lengths and intervals range from 2 to 12 hours (FIG. 1C).

(295) We also developed a multiple-inducer DIC 3-Counter by replacing the P.sub.BAD promoters in the single-inducer DIC 3-Counter with the inducible promoters P.sub.Ltet0-1, P.sub.BAD, and P.sub.A1lacO (FIG. 2A and FIG. 8). These promoters respond to anhydrotetracycline (aTc), arabinose, and isopropyl -D-1-thiogalactopyranoside (IPTG), respectively (FIG. 2A). When exposed to aTc followed by arabinose followed by IPTG, the multiple-inducer DIC 3-Counter produced a high GFP output (FIG. 2B). No other permutations of the three inducers produced a high output, though some did exhibit a small amount of leakage (FIGS. 2C-2D). These results demonstrate that the circuit can be programmed to only record a desired sequence of events.

(296) We have constructed and validated two complementary designs for synthetic counters that operate across a range of time scales. These counters are both highly modular and are capable of functioning with any inducer-promoter pairs, as demonstrated by the different promoters used in the multiple-inducer DIC 3-Counter. Additionally, the architectures of both counters allow for the tunable output expression of any protein species of interest at any number in the counting process. While the constructs described here were built to count up to three events, our engineered genetic counter designs are both extensible with the use of other unique polymerases or recombinases, of which many are known. In addition to these shared qualities, each counter comes with its own set of properties. Our RTC Counters demonstrate fast activation due to transcriptional and translational regulatory elements, making them useful for counting cellular events on the time scale of cell division. The DIC Counters operate on time scales of hours (FIG. 9) as a result of DNA recombination dynamics (S. W. Santoro and P. G. Schultz, Proc Natl Acad Sci USA 99, 4185 (2002)), and they are built with a novel SIMM design that memorizes counter state based on DNA orientation. Together, these features could enable the design of temporally sensitive, complex synthetic programs as well as other types of counters.

(297) Previous synthetic gene networks have demonstrated the feasibility of constructing biological analogues of some aspects of digital circuits, such as inverters (Y. Yokobayashi et al., Proc Natl Acad Sci USA 99, 16587 (2002)), logic gates (K. Rinaudo et al., Nat Biotechnol 25, 795 (2007); G. Seelig et al., Science 314, 1585 (2006)), toggle switches (T. S. Gardner et al., Nature 403, 339 (2000)), oscillators (M. B. Elowitz, S. Leibler, Nature 403, 335 (2000)), and pulse generators (S. Basu et al., Proc Natl Acad Sci USA 101, 6355 (2004)).

(298) Synthetic gene circuits have enlarged the molecular toolset available to bio-engineers and molecular biologists (Y. Yokobayashi et al., Proc Natl Acad Sci USA 99, 16587 (2002); (K. Rinaudo et al., Nat Biotechnol 25, 795 (2007); G. Seelig et al., Science 314, 1585 (2006); T. S. Gardner et al., Nature 403, 339 (2000); (M. B. Elowitz, S. Leibler, Nature 403, 335 (2000); S. Basu et al., Proc Natl Acad Sci USA 101, 6355 (2004); T. S. Bayer, C. D. Smolke, Nat Biotechnol 23, 337 (2005); E. A. Davidson, A. D. Ellington, Trends Biotechnol 23, 109 (2005); F. J. Isaacs et al., Nat Biotechnol 24, 545 (2006); M. Mandal, R. R. Breaker, Nat Rev Mol Cell Biol 5, 451 (2004); O. Rackham, J. W. Chin, Nat Chem Biol 1, 159 (2005)), enabling them to program novel cellular behaviors (J. C. Anderson et al., J Mol Biol 355, 619 (2006); S. Basu et al., Nature 434, 1130 (2005); T. L. Deans et al., Cell 130, 363 (2007); J. Hasty et al., Nature 420, 224 (2002); H. Kobayashi et al., Proc Natl Acad Sci USA 101, 8414 (2004); A. Levskaya et al., Nature 438, 441 (2005)), learn more about the necessary design principles of synthetic biology (B. F. Pfleger et al., Nat Biotechnol 24, 1027 (2006); J. M. Pedraza, A. van Oudenaarden, Science 307, 1965 (2005); S. Hooshangi et al., Proc Natl Acad Sci USA 102, 3581 (2005); N. J. Guido et al., Nature 439, 856 (2006)), and construct therapeutic agents (T. K. Lu, J. J. Collins, Proc Natl Acad Sci USA 104, 11197 (2007)).

(299) Our synthetic counters represent complementary designs that can be used in different settings for a variety of purposes across a range of time scales. For example, if inputs to our RTC Counter are coupled to the cell cycle, cell death is programmed to occur after a user-defined number of cell divisions as a safety mechanism in engineered strains, which is useful for biosensing, bioremediation, or medical purposes. In addition, the multiple-inducer DIC Counter are useful for studying sequential events that occur in settings such as developmental biology and gene cascades, as the single-inducer DIC counter can record events encountered in its environment (e.g., for biosensing), and our SIMM design can be used in other synthetic circuits to maintain genetic memory of low frequency events, for therapeutic or other applications such as studying neural circuits.

(300) Materials and Methods

(301) RTC Counter Plasmid Construction

(302) RTC Counter plasmids were constructed using basic molecular cloning techniques (J. Sambrook et al., Molecular Cloning: A Laboratory Manual, (Cold Spring Harbor Laboratory Press, Plainview, N.Y., edn. 2, 1989). New England Biolab's restriction endonucleases, T4 DNA Ligase, and Taq Polymerase were used as well as Invitrogen's PCR SuperMix High Fidelity. PCRs were carried out with an MJ Research PTC-200 Peltier Thermal Cycler. Synthetic oligonucleotides were made by Integrated DNA Technologies. For cloning, plasmids were transformed into E. coli strain DH5 (F 80lacZM15 (lacZYA-argF)U169 deoR recA1 endA1 hsdR17(r.sub.k.sup., m.sub.k.sup.+)phoA supE44 thi-1 gyrA96 relA1.sup.) with a standard heat shock protocol (Ibid.), and isolated with Qiagen QIAprep Spin Miniprep Kits. Plasmid modifications were confirmed by restriction digests and sequencing by Agencourt.

(303) RTC Counter Plasmid Design

(304) Two plasmidsthe RTC 2-Counter and RTC 3-Counterwere made, both derived from the riboregulator vector pZER21Y1212G reported by Isaacs et al. (F. J. Isaacs et al., Nat Biotechnol 22, 841 (2004)), itself based strongly on the Lutz and Bujard pZE21 expression vector (R. Lutz, H. Bujard, Nucleic Acids Res 25, 1203 (1997)). These contain kanamycin resistance, ColE1 origin of replication, the P.sub.BAD promoter driving transcription of taRNA version taR12 (F. J. Isaacs et al., Nat Biotechnol 22, 841 (2004)), and the P.sub.Ltet0-1 promoter. Both constructs were modified to have the P.sub.Ltet0-1 promoter driving transcription of T7 RNA polymerase (NCBI Accession NC_001604.1). For the RTC 2-Counter construct, there is also the T7 promoter (SEQ ID NO: 136 TAATACGACTCACTATAGGGAGA) driving transcription of GFPmut3b (B. P. Cormack, R. H. Valdivia, S. Falkow, Gene 173, 33 (1996)); for the RTC 3-Counter construct, the T7 promoter drives transcription of T3 RNA polymerase (NCBI Accession NC_003298.1). The RTC 3-Counter additionally contains the T3 promoter 14.3m (SEQ ID NO: 150 ATTAACCCTCACTAAAGGGAGA) (D. Sengupta, D. Chakravarti, U. Maitra, J Biol Chem 264, 14246 (1989)), which drives transcription of GFPmut3b. All genes used in these constructs were engineered with the crR12 cis-repressor sequence upstream of the RBS (F. J. Isaacs et al., Nat Biotechnol 22, 841 (2004)). All promoters were paired with appropriate transcription terminators: P.sub.BAD with the E. coli rrnB terminator, P.sub.Ltet0-1 with the E. coli terminator T1 (of the rrnB terminator), P.sub.T7 with T7 transcription terminator Tphi, and P.sub.T3 with T3 transcription terminator Tphi.

(305) RTC Counter Experimental Conditions

(306) All experiments were conducted with the E. coli K-12pro strain (F.sup.+, P.sub.N25/tetR, P.sub.laciq/lacI, Sp.sup.r). For both the RTC 2-Counter and 3-Counter experiments, cells containing the counting vector were grown overnight in a Luria-Bertani (DIFCO) medium containing 30 g/mL kanamycin, then diluted 1:100 and grown between 5 and 6.5 hours to an OD between 1.1 and 1.6 before being aliquoted into clear-bottom 24-well assay plates, 1 mL per well. For the 2-Counter, cells pulsed with arabinose had arabinose added to their wells for a final concentration of 0.001% at 0 minutes (immediately following the aliquot) and/or at 50 minutes. Pulses were left in the media for 10 minutes before cells were transferred into 1.5 mL tubes and spun for 1 minute at 8,000 rpm. Media was aspirated out of these tubes, and cells were resuspended in fresh media and transferred back to the plate. The 3-Counter experiments had 0.01% (final concentration) arabinose pulses delivered at varying times. All cells in 24-well plates were maintained at 37 C. throughout the course of the experiments, with shaking in between measurements. Experiments were performed in triplicate, and all data points shown are the mean values of these replicates.

(307) RTC Counter Flow Cytometer Measurements

(308) Data were collected with a Becton Dickinson FACSCalibur flow cytometer. Fluorescence was calibrated with Calibrite Beads (Becton Dickinson) and measured with a 488-nm argon laser excitation and a 515-nm to 545-nm emission filter. At each time point, 8 L of cells were taken from the plate wells and diluted into 1 mL of filtered PBS, pH 7.2. Mean fluorescence measurements were calculated by BD Biosciences' Cellquest Pro software, from samples containing at least 100,000 cells. No filters or gates were used on the cell populations.

(309) RTC Counter Spectrophotometer Measurements

(310) Data was collected with a Tecan SPECTRAFluor Plus spectrophotometer. Excitation and emission wavelengths were 485 nm and 535 nm, respectively, with a fixed gain set at 40.

(311) RTC Counter Mathematical Modeling

(312) Mathematical modeling was used to verify the logic-based predictions of our design, to investigate the effects of pulse frequency and pulse length on the performance of the RTC counters, and to explore the possibility of counting to higher numbers. We used ordinary differential equations (ODE) to describe the temporal trajectories of population averages for all biochemical species. Stochastic modeling was not included because of the population homogeneity. Details for the modeling of each of the two constructs are described herein.

(313) The RTC 2-Counter Model

(314) Based on the design of the RTC 2-Counter, we approximated the system dynamics using the following biochemical reactions described below, where Eqs. (1)-(3) represent the synthesis and degradation of trans-activator (taRNA), T7 RNA polymerase transcripts in cis-repressed form (mT7cr), and GFP transcripts in cis-repressed form (mGFPcr), respectively. Transcripts in cis-repressed form are indicated by cr. Kinetic parameters are as indicated in the equations. Eqs. (4) and (5) represent the binding of taRNA with mT7cr and mGFPcr so that the transcripts can be translated; these repression-relieved transcripts are denoted as mT7 and mGFP. Eqs. (6) and (7) represent the translations of mT7 and mGFP, respectively, with pT7 and pGFP as notations for these two proteins. Finally, Eqs. (8) and (9) represent the degradation of proteins. These biochemical reactions were sufficient to describe the system dynamics with high accuracy

(315) ##STR00001##

(316) Based on these reactions, we wrote down the differential equations that describe the temporal evolution of all the species. Some of the parameters in the biochemical reactions are lumped parameters that are expanded to their explicit forms in the differential equations. The notations for all chemical species in this model (and the RTC 3-Counter model) are simplified and listed in Table 74, with all parameter values listed in Table 75. The square brackets in these equations indicate chemical species concentration. Because the fluorescence data to which we directly fit the model (see below for details) have arbitrary units, GFP protein concentrations in the model are considered nondimensional. All other parameter values, except for degradation rates (min.sup.1) and k_ara (concentration), are nondimensional as well.

(317) The following five equations were used to capture the temporal dynamics of the system,

(318) $\begin{array}{cc}\frac{\left[\mathrm{taRNA}\right]}{t}=\mathrm{sT}\frac{\left[\mathrm{ara}\right]}{\left[\mathrm{ara}\right]+\mathrm{k\_ara}}+s0\mathrm{\_taRNA}-\mathrm{\_taRNA}.Math.\left[\mathrm{taRNA}\right]& \left(10\right)\\ \frac{\left[\mathrm{mT}7\mathrm{cr}\right]}{t}=s0\mathrm{\_mT7}\mathrm{cr}-\mathrm{\_mT7}\mathrm{cr}.Math.\left[\mathrm{mT}7\mathrm{cr}\right]& \left(11\right)\\ \frac{\left[\mathrm{pT}7\right]}{t}=s_0\mathrm{\_pT7}.Math.\left[mT7\mathrm{cr}\right]+\mathrm{s\_pT}7k.Math.\left[\mathrm{taRNA}\right].Math.\left[\mathrm{mT}7\mathrm{cr}\right]-\mathrm{\_pT}7.Math.\left[\mathrm{pT}7\right]& \left(12\right)\\ \frac{\left[\mathrm{mGFPcr}\right]}{t}=\mathrm{s0\_mGFPcr}+\mathrm{k\_pT}7.Math.\frac{{\left[\mathrm{pT}7\right]}^n}{\mathrm{km}{7}^n+{\left[\mathrm{pT}7\right]}^n}-\mathrm{\_mGFP}.Math.\left[\mathrm{mGFPcr}\right]& \left(13\right)\\ \frac{\left[\mathrm{pGFP}\right]}{t}=s_0\mathrm{\_pGFP}.Math.\left[\mathrm{mGFPcr}\right]+\mathrm{s\_pGFPk}.Math.\left[\mathrm{taRNA}\right].Math.\left[\mathrm{mGFPcr}\right]-\mathrm{\_pGFP}.Math.\left[\mathrm{pGFP}\right]& \left(14\right)\end{array}$
where on the right-hand side of Eq. (10), taRNA synthesis rate has two parts: the first part (s.sub.0.sub._taRNA) represents the basal production rate without any induction, and the second part (sT*ara/(ara+kara)) represents the synthesis rate induced by arabinose. To simplify the system, we assumed that the arabinose induction effect has a Hill function form with a Hill coefficient equal to 1. The third term of Eq. (10) represents taRNA degradation using a simple exponential decay with rate d_taRNA. In Eq. (11), cis-repressed T7 RNA polymerase transcripts (mT7cr) are constitutively expressed, with a constant production rate (s0_mT7cr) and exponential decay. Similarly, in Eq. (12), T7 RNA polymerase protein synthesis rate has two parts: s.sub.0.sub._pT7*mT7cr represents the translation rate of mT7cr without taRNA binding, and s_pT7k*taRNA*mT7cr represents the translation rate of mT7cr with taRNA binding. Here we assumed that taRNA binding and dissociation with mRNA [Eqs. (4) and (5)] have a much faster time scale than other reactions and reach equilibrium instantly. Thus, the parameter s_pT7k, for example, is also a lumped parameter with information about the binding reaction in Eq. (4) included. In Eq. (13), GFP mRNA synthesis depends on the basal transcription rate and on T7 RNA polymerase protein abundance. We used a general Hill function to describe this dependency: k_pT7*pT7.sup.n/(pT7.sup.n+km7.sup.n), where n accounts for any type of cooperativity caused by T7 RNA polymerase activation. In Eq. (14), GFP protein dynamics parallel that of the T7 RNA polymerase protein in Eq. (12)
Extension to the RTC 3-Counter

(319) The RTC 3-Counter construct is similar to the RTC 2-Counter in design and topology, and they have a number of components in common. So for the RTC 3-Counter model we used many of the same equations used for the RTC 2-Counter model. Besides the reactions in Eqs. (1)-(9), there are four additional reactions, where Eq. (10) represents the synthesis and degradation of cis-repressed T3 RNA polymerase transcripts (mT3cr) and Eq. (11) represents the binding of taRNA with mT3cr. Eqs. (12) and (13) represent translation and degradation of T3 RNA polymerase protein, respectively.

(320) ##STR00002##

(321) The differential equations describing the RTC 3-Counter construct are similar to the RTC 2-Counter differential equations, except Eq. (13) changes to:

(322) $\begin{array}{cc}\frac{\left[\mathrm{mGFPcr}\right]}{t}=\mathrm{s0\_mGFPcr}+\mathrm{k\_pT3}.Math.\frac{{\left[\mathrm{pT}3\right]}^n}{\mathrm{km}{3}^n+{\left[\mathrm{pT}3\right]}^n}-\mathrm{\_mGFP}.Math.\left[\mathrm{mGFPcr}\right]& \left(19\right)\end{array}$
and the following two equations are added:

(323) $\begin{array}{cc}\frac{\left[\mathrm{mT}3\mathrm{cr}\right]}{t}=s0\mathrm{\_mT3cr}+\mathrm{k\_pT7}.Math.\frac{{\left[\mathrm{pT}7\right]}^n}{\mathrm{km}{7}^n+{\left[\mathrm{pT}7\right]}^n}-\mathrm{\_mT3}.Math.\left[\mathrm{mT}3\mathrm{cr}\right]& \left(20\right)\\ \frac{\left[\mathrm{pT}3\right]}{t}=s_0\mathrm{\_pT3}.Math.\left[\mathrm{mT}3\mathrm{cr}\right]+\mathrm{s\_pT3k}.Math.\left[\mathrm{taRNA}\right].Math.\left[\mathrm{mT}3\mathrm{cr}\right]-\mathrm{\_pT3}.Math.\left[mT3\mathrm{cr}\right]& \left(21\right)\end{array}$

(324) Eqs. (20) and (21) describe the change of T3 RNA polymerase transcripts and proteins over time. They have the same forms as Eqs. (13) and (14), respectively, with similar parameter implications.

(325) RTC Counter Arabinose Induction

(326) Different counter strains were induced by different numbers of external arabinose pulses to test and verify the counting behavior. To account for the arabinose pulse dynamics, we modeled it with two differential equations. The first equation describes arabinose when it is present in the medium:

(327) $\begin{array}{cc}\frac{\left[\mathrm{ara}\right]}{t}=-\mathrm{cAra}& \left(22\right)\end{array}$

(328) This represents a constant consumption rate of arabinose, when it is present in abundance. The second equation describes arabinose after the cells have been spun and resuspended in arabinose-free media. The leftover, mainly intracellular arabinose is modeled as an exponentially decaying chemical species:

(329) $\begin{array}{cc}\frac{\left[\mathrm{ara}\right]}{t}=-\mathrm{Ara}.Math.\left[\mathrm{ara}\right]& \left(23\right)\end{array}$

(330) In the simulations, Eqs. (22) and (23) were used alternately so as to be consistent with actual experimental conditions.

(331) RTC Counter Fitting of Experimental Data

(332) Matlab function lsqcurvefit was used to narrow down the model parameters by fitting the model equations to experimental measurements. The parameter set that resulted in the most optimal data fitting among two hundred runs was chosen, with fluorescence levels of uninduced samples subtracted from all other experimental data. Parameters values used for these figures are listed in Table 75. The experimental arabinose doses used in the RTC 3-Counter experiments were ten-fold higher than those in the RTC 2-Counter experiments; thus parameters k_ara and cAra were adjusted ten-fold higher (as written in Table 75) for the RTC 3-Counter model to match the experimental results.

(333) DIC Counter Plasmid Construction

(334) DIC Counter plasmids were constructed using basic molecular cloning techniques (S1). New England Biolab's restriction endonucleases, T4 DNA Ligase, and NEB's Phusion PCR kits were used. PCRs were carried out with an MJ Research PTC-200 Peltier Thermal Cycler. Synthetic oligonucleotides were made by Integrated DNA Technologies. Single-inducer DIC Counter plasmids were transformed into E. coli strain DH5 (F.sup. 80lacZM15 (lacZYA-argF)U169 deoR recA1 endA1 hsdR17(r.sub.k.sup., m.sub.k.sup.+) phoA supE44 thi-1 gyrA96 relA1.sup.). Multiple-inducer DIC Counter plasmids were transformed into E. coli strain DH5PRO (F.sup. 80/acZM15 (lacZYA-argF)U169 deoR recA1 endA1 hsdR17(r.sub.k.sup., m.sub.k.sup.+) phoA supE44 thi-1 gyrA96 relA1.sup., P.sub.N25/tetR, P.sub.laciq/lacI, Sp.sup.r). Transformations were carried out using standard electroporation protocols (J. Sambrook et al., Molecular Cloning: A Laboratory Manual, (Cold Spring Harbor Laboratory Press, Plainview, N.Y., edn. 2, 1989)) and isolated with Qiagen QIAprep Spin Miniprep Kits. Plasmid modifications were confirmed by restriction digests.

(335) DIC Counter Plasmid Design

(336) The single-inducer DIC 2-Counter (FIG. 4) and 3-Counter (FIG. 5) and multiple-inducer DIC 3-Counter (FIG. 8) were based off of the single-copy pBAC platform (D. A. Wright et al., Nat Protoc 1, 1637 (2006)). pBAC-lacZ (Addgene plasmid 13422) was obtained from Addgene (Cambridge, Mass.). We cloned all components for the DIC Counters in between ScaI and PciI restriction sites in pBAC-lacZ. Custom sequences, including recombinase recognition sites, were constructed using sequential PCR with DNA obtained from Integrated DNA Technologies (Coralville, Iowa). Promoters P.sub.Ltet0-1 and P.sub.A1lacO and terminators were obtained from R. Lutz, H. Bujard, Nucleic Acids Res 25, 1203 (1997), while P.sub.BAD was obtained from F. J. Isaacs et al., Nat Biotechnol 22, 841 (2004). The cre gene was obtained from A. Levskaya et al., Nature 438, 441 (2005). The flp.sub.e gene was derived from pCAG-Flpe (Addgene plasmid 13787) and based off of F. Buchholz et al., Nature biotechnology 16, 657 (July, 1998). The ribosome-binding sequences used in each stage were derived from S. Basu et al., Proc Natl Acad Sci USA 101, 6355 (2004), while ssrA-based degradation tags were designed according to J. B. Andersen et al., Appl Environ Microbiol 64, 2240 (June, 1998).

(337) DIC Counter Experimental Conditions

(338) All experiments were performed in Luria-Bertani media containing 30 g/mL kanamycin. Prior to performing flow cytometer measurements on the DIC Counters, cells were grown overnight. To initiate experiments, cells were diluted 1:2000 in fresh media and grown at 37 C. and 300 rpm with inducers as indicated in the specific figures. Inducer concentrations were anhydrotetracycline=700 ng/mL, arabinose=0.1%, and IPTG=10 mM except for FIG. 2B in which anhydrotetracycline=100 ng/mL, arabinose=10.sup.3%, and IPTG=10 mM. At all inducer transitions (i.e., transitions from media with inducer to media without inducer, transitions from media without inducer to media with inducer, or transitions from media with one inducer to media with another inducer), cells were diluted 1:2000 in fresh media. Only in FIG. 1C with pulse intervals 2 h and 4 h were cells not diluted 1:2000 in fresh media for transitions from media without inducer to media with inducer due to low optical density of the cultures. Instead, inducer was added directly to the media; however, cells were still diluted 1:2000 in fresh media for transitions from media with inducer to media without inducer.

(339) DIC Counter Flow Cytometer Measurements

(340) Data for FIGS. 1, 2, 6, 7, and 9 were collected with a Becton Dickinson FACSCalibur flow cytometer. Fluorescence was calibrated with Calibrite Beads (Becton Dickinson) and measured with a 488-nm argon laser excitation and a 515-nm to 545-nm emission filter. Before analysis, cells were diluted in sterile phosphate-buffered saline. Becton Dickinson Calibrite Beads were used for instrument calibration. 50,000 cells were collected for each sample, gated to ensure consistency between samples, and processed with MATLAB to calculate mean fluorescence data points (Mathworks, Natick, Mass.).

(341) RTC Counter Characteristics and Improvements

(342) Whole Population Measurements

(343) To verify the counting behavior, we also analyzed the RTC 2-Counter and the RTC 3-Counter with a spectrophotometer, which measures the total fluorescence in a given cell population. These spectrophotometer results corroborate the data from the flow cytometer. In the case of the RTC 2-Counter, the uninduced population similarly shows no increase in fluorescence, while populations that received either the first or the second arabinose pulse exhibit only some fluorescence. Cells that receive both pulses show a striking increase in fluorescence at 50 minutes, validating our design. The spectrophotometer measurements of the RTC 3-Counter reveal a similar corroboration, in which only cells that are pulsed three times respond with sharp increases in fluorescence.

(344) Flow cytometer and spectrophotometer data sets do diverge qualitatively, where flow cytometer measurements exhibit a peak in fluorescence and then decrease whereas spectrophotometer measurements exhibit a fluorescence plateau. The decrease is likely due to external factors such as cell division (J. Roostalu et al., BMC Microbiol. 8, 68 (2008)), and is revealed in single-cell measurements of the flow cytometer. This effect is not seen in the spectrophotometer, where measurements are made on whole populations. Data presented are the mean of three replicates, and smoothed with a rolling window average.

(345) Flow Cytometry Population Analysis

(346) The data presented are mean fluorescence values of RTC counter cell populations, measured by a flow cytometer. We show the fluorescence profile of the entire RTC 3-Counter population when it is uninduced, after the second pulse, and after the third pulse. It is clear that the entire population shifts homogeneously following induction, with the greatest shift occurring as a result of the third pulse.

(347) Verification of Discrete Counting

(348) To verify that the counting response is driven by discrete induction pulses and not simply a summation of induction length, we took a fixed total length of induction and split it into two and three pulses. RTC 3-Counter cells were either given two short pulses followed by a long pulse or two long pulses, with total induction time equal for both sets of cells. It can be seen in that cells receiving three pulses (dark) generate significantly more GFP than cells receiving two pulses (light), demonstrating a true counting mechanism and not simply a summing effect. This supports our claim that the counter is able to distinguish between different numbers of pulses, even when total induction time is held constant. Additionally, our mathematical model accurately predicted the experimental results for both scenarios.

(349) Higher Number Counters

(350) To investigate the possibility of expanding our design to count higher numbers, we expanded our system using mathematical modeling. We added extra genes to the cascade, each one an RNA polymerase whose downstream promoter regulates the transcription of the gene at the next node. We modeled cascades with up to ten nodes; in each case the first node is T7 RNA polymerase, the last node is GFP, and all nodes in between are polymerases with exactly the same kinetic properties as T3 RNA polymerase. With two additional differential equations for each node, we use mathematical modeling to predict the behavior of these higher number counters by comparing the fluorescence readout of n, n1, and n2 arabinose pulses for each n-node counter. As shown in FIG. 10A, the top line is the fluorescence result of n pulses, the middle line of n1 pulses, and the bottom line n2 pulses. It can be seen that the absolute difference in fluorescence levels between n and n1 pulses increases with cascade length, suggesting the design can better distinguish different numbers of pulses as it is extended. Additionally, all three lines increase as the construct is extended, due to signal propagation and the accumulation of long-lived proteins as more pulses are delivered.

(351) This predicted accumulation effect results in the failure of this system to perform digitally as n increases, with ones and zeros no longer represented by high and low protein concentrations. However, by examining the temporal dynamics of all the chemical species in the cascades, we identified that it is the long half-life of GFP protein that causes the signal increase after n1 and n2 pulses. FIG. 10B is the predicted counter output in which GFP protein has its half-life shortened to 8 minutes instead of the 231 minute half life used for FIG. 10A. FIG. 10B illustrates that when the final output protein has a shortened half-life, the counter performance is remarkably robust as n increases. Counting from 2 to 10, output from n pulses increases almost exponentially while output from n1 and n2 pulses increases only marginally.

(352) In some embodiments, if shortening the final protein's half-life is not possible or desirable, an alternative method for digitizing the output signal would be to couple the counter to a toggle switch (S. Basu et al., Proc Natl Acad Sci USA 101, 6355 (2004)). By placing one of the toggle repressor proteins at the final node of the counter cascade, it would be possible to flip a toggle from one state to the other with expression from the counter. The sharp and tunable switching threshold of a toggle switch may be used to filter out counter leakage due to n1 or n2 pulses, switching states only when n pulses produces a concentration of repressor proteins in excess of the switching threshold.

(353) Extending the DIC Counter

(354) Each of our individual counting units requires only a single recombinase whereas the protein-based toggle switch utilizes two proteins (T. S. Gardner et al., Nature 403, 339 (2000)). This allows our design to be extendable in a modular fashion using >100 identified recombinases to count to higher numbers (A. C. Groth, M. P. Calos, J Mol Biol 335, 667 (2004)). Recombinases can also be mutagenized to have altered site preferences or thermostabilities, allowing for increased diversity to create synthetic gene circuits. The availability of additional recombinases enables the DIC counter to be extended more readily than other systems that require rarer or more specialized components.

(355) RTC and DIC Counter Designs: Further Embodiments

(356) Compared to electronic counters, our biological counters are in an early stage of development. Our counters scale linearly instead of exponentially as is the case with digital electronic circuits that count in binary (P. Horowitz, W. Hill, The Art of Electronics. (Cambridge University Press, Cambridge, United Kingdom, ed. 2nd, 1989)). Counter designs which count in binary require the addition of bit reset and carry operations (Ibid.). The DIC counter is amenable to being adapted with advanced digital designs due to the ability of SIMMs to maintain memory and invert in both orientations. Reset operations could be carried out by downstream promoters which drive the transition of inverted SIMMs back to their original orientations. Carry operations could be achieved by components that act in trans to affect DNA orientation, insertions, or deletions on many different SIMMs or DIC counters; these trans-based components may include bacteriophage integrases and excisionases (A. C. Groth, M. P. Calos, J Mol Biol 335, 667 (2004)) or transcriptional activators. The development of biological counters with exponential scaling greatly expands the potential applications of biological counters.

(357) Though there will invariably be upper limits to pulse frequencies that can be detected by counters, such as those described herein, those limits can be improved by combining synthetic counters with pulse-generating circuits that can detect edge transitions with greater rapidity (E. A. Davidson, A. D. Ellington, Trends Biotechnol 23, 109 (2005)) and/or with amplifiers that can enhance the magnitude of inputs. Pulse-generating circuits (Ibid.) can also enable the RTC counter and the single-inducer DIC counter to record low-frequency events with greater fidelity.

(358) TABLE-US-00075 TABLE 74 A summary of chemical species represented in the RTC Counter model and their notations. Notation Chemical species taRNA trans-activator mT7cr cis-repressed T7 RNA polymerase mRNA mT7 T7 RNA polymerase mRNA pT7 T7 RNA polymerase protein mGFPcr cis-repressed GFP mRNA mGFP GFP mRNA pGFP GFP protein mT3cr cis-repressed T3 RNA polymerase mRNA mT3 T3 RNA polymerase mRNA pT3 T3 RNA polymerase protein ara Arabinose

(359) TABLE-US-00076 TABLE 75 A list of all parameter values used in the RTC Counter models k_ara* 0.0571 d_pT7 0.0056 km7 3.0455 s0_taRNA 0.0008 s_pGFPk 0.9923 k_pT3 3.006 d_taRNA 0.1177 d_pGFP 0.003 s0_mT3cr 0.0003 s0_mT7cr 0.0252 dAra 0.1201 d_mT3 0.0701 d_mT7 0.0706 s0_pT7 0.0003 s0_pT3 0 k_pT7 3.8009 s0_pGFP 0.1007 s_pT3k 0.0115 s0_mGFPcr 0.0123 sT 0.8467 d_pT3 0.0069 d_mGFP 0.07 cAra* 0.0003 n3 0.8892 s_pT7k 0.0766 n7 2.602 km3 7.9075