Improved DNA vaccine plasmids are disclosed that contain novel immunostimulatory RNA compositions. The improved plasmids eliminate all extraneous sequences, incorporate a novel antibiotic free short RNA based selectable marker, increase eukaryotic expression using a novel chimeric promoter, improve yield and stability during bacterial production, and improve immunostimulation. These vectors are utilized in immunization to elicit improved immune responses or therapy to induce type 1 interferon production.

Compositions and methods for the inducible expression of genes in eukaryotic cells are provided. Expression of a nucleotide sequence of interest encoding a protein of interest is controlled by a regulatory fusion protein that consists of a transcription blocking domain and a ligand-binding domain. When a cognate ligand for the ligand-binding domain is present, transcription of the nucleotide sequence of interest is blocked. Upon removal of the cognate ligand, the nucleotide sequence of interest is transcribed. The method is useful for large scale bioreactor production of a desired protein of interest in eukaryotic cells.

Provided herein are compositions and methods for driving high expression of a transgene. Compositions and methods for driving high expression of a transgene comprising one or more human-derived regulatory elements, which, when operably linked to a transgene, can result in high expression of the transgene in one or more cell types or tissues.

The invention provides a microbial production cell for synthesis of a product, further comprising a burden-addiction genetic circuit whose expression confers a selective growth and/or survival advantage on those cells that synthesize the product; while limiting proliferation of low- or non-productive escaper cells.

Compositions and methods are provided for Tat-inducible expression of a CRISPR-associated endonuclease by a truncated HIV LTR promoter containing at least a core region and a TAR region of a HIV LTR promoter. The compositions may be used as a therapeutic treatment for the treatment and/or prevention of HIV.

Disclosed are eukaryotic expression systems and methods for the selection of mammalian cell lines that produce proteins of interest, such as therapeutic proteins. The systems and methods allow for a simple and fast selection of cells mediating high levels of recombinant protein production. The systems and methods decrease the efforts and time needed to bring a new therapeutic protein to the patients, and also lower the cost of the therapeutic protein by increasing the productivity of cells in a bioreactor.

Four zebrafish gene promoters, which are skin specific, muscle specific, skeletal muscle specific and ubiquitously expressed respectively, were isolated and ligated to the 5 end of the EGFP gene. When the resulting chimeric gene constructs were introduced into zebrafish, the transgenic zebrafish emit green fluorescence under a blue light or ultraviolet light according to the specificity of the promoters used. Thus, new varieties of ornamental fish of different fluorescence patterns, e.g., skin fluorescence, muscle fluorescence, skeletal muscle-specific and/or ubiquitous fluorescence, are developed.

The present invention provides nucleic acid and protein sequences that enhance the expression of fusion proteins by host cells, and in particular bacterial species, together with methods use thereof. While described hereinafter in terms of expression of fusion proteins by Listeria monocytogenes, the present invention is applicable to expression of fusion proteins generally.

A recombinant herpesvirus-based vector comprising a nucleic acid sequence encoding a heterologous antigen and a promoter for controlling the expression of the antigen, in which the promoter is expressed at a time selected to provide a required immune response in a subject.

Modified E1a regulatory sequences are provided, wherein at least one Pea3 binding site, or a functional portion thereof, is deleted. Also provided are modified E1a sequences that selectively express particular isoforms. Also provided is an E1b-19K clone insertion site. These modified sequences can be used individually, or in combination with one another, to provide tumor-selective expression of proteins.