The present disclosure provides methods and compositions for facilitating efficient adeno-associated virus (AAV)-based homologous recombination (HR). Subject methods include a step of contacting a cell (e.g., a population of cells) with a ribonucleotide reductase inhibitor, which provides for increased HR efficiency compared to performing HR in the absence of the inhibitor. The cell is also contacted with a recombinant adeno-associated vims (rAAV) that includes a donor DNA having a sequence cassette (i.e., a nucleotide sequence of interest) flanked by homology arms that facilitate integration of the sequence cassette into a target genomic locus via HR.

The invention relates to methods and bacterial strains for making terpene and terpenoid products, the bacterial strains having improved carbon pull through the MEP pathway and to a downstream recombinant synthesis pathway.

Disclosed is an NADH-dependent amino acid dehydrogenase and an application thereof in increasing lysine yield. The amino acid dehydrogenases are aspartate dehydrogenase derived from Pseudomonas aeruginos, aspartate semialdehyde dehydrogenase derived from Tistrella mobilis, dihydropyridine dicarboxylic acid reductase derived from Mycobacterium tuberculosis, and diaminopimelate dehydrogenase derived from Tepidanaerobacter acetatoxydans. The amino acid sequences thereof are as shown in SEQ ID NOs: 1, 3, 5, and 7, respectively. NADH or both NADH and NADPH can be used as co-factors of the amino acid dehydrogenase to synthesize lysine, thereby reducing the demand for NADPH in the cell, and significantly increasing the production of lysine or pentanediamine.

Disclosed herein are novel microbial polycultures of two or more cell strains, capable of producing flavanones, flavonoids, and anthocyanidin-3-O-glucosides, and methods of use thereof. Also disclosed is a microbial cell capable of producing phenylpropanoic acids, and methods of use thereof.

Disclosed herein are novel microbial polycultures of two or more cell strains, capable of producing flavanones, flavonoids, and anthocyanidin-3-O-glucosides, and methods of use thereof. Also disclosed is a microbial cell capable of producing phenylpropanoic acids, and methods of use thereof.

The present invention relates to an L-lysine-producing microorganism of the genus Corynebacterium and a method for producing L-lysine using the same.

The invention relates to methods and bacterial strains for making terpene and terpenoid products, the bacterial strains having improved carbon pull through the MEP pathway and to a downstream recombinant synthesis pathway.

Methods of inducing a CD8+ T cell response to a heterologons antigen in which at least 10% of the CD8+ T cells are MHC-E restricted are disclosed. The method involves immunizing with a CMV vector that does not express UL128 and UL130 proteins. Also disclosed are recombinant CMV vectors comprising nucleic acids encoding a heterologous protein antigen, a UL40 protein, and a US28 protein but that do not express an active UL128 and UL130 protein. Also, disclosed are recombinant CMV vectors comprising nucleic acids encoding a heterologous protein antigen, but that do not express an active UL40 protein, UL128 protein, UL130 protein, and optionally a US28 protein. Also disclosed are recombinant CMV vectors comprising nucleic acids encoding a heterologous protein antigen, but that do not express an active US28 protein, UL128 protein, UL130 protein, and optionally a UL40 protein.

In various aspects and embodiments, the invention relates to bacterial strains and methods for making terpene and terpenoid products. The invention provides bacterial strains with improved carbon flux through the MEP pathway, to thereby increase terpene and/or terpenoid product yield by fermentation with carbon sources such as glucose.

The present invention relates to a genetically-engineered Mycobacterium strain and a use thereof in the preparation of steroidal compounds. The genetically-engineered Mycobacterium strain is a Mycobacteria which lacks of acyl-CoA dehydrogenase genes fadE31, fadE32 and fadE33, wherein acyl-CoA dehydrogenase genes fadE31, fadE32 and fadE33 respectively encode proteins as follows: having amino acid sequences according to SEQ ID NOs 4, 6 and 8; derived by substituting, deleting or inserting one or more amino acids in the amino acid sequence defined by preceding protein and having the same function as that of the preceding protein. The present invention constructs a genetically-engineered Mycobacterium strain and applies it in preparing steroidal compounds, thereby enriching the types of valuable intermediates, improving the production efficiency and product quality of steroid drugs, reducing energy consumption in the steroid drugs production, simplifying production steps, and reducing production costs.