Artificial expression constructs for selectively modulating gene expression in selected central nervous system cell types are described. Particularly, the artificial expression constructs can be used to selectively express synthetic genes and/or modify gene expression in neocortical glutamatergic layer 5 neurons, such as glutamatergic layer 5 extratelencephalic-projecting (L5 ET) neurons.

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.

Provided is a method for screening a Corynebacterium constitutive expression vector promoter on the basis of transcriptome sequencing; and further provided are the Corynebacterium constitutive expression vector promoter screened on the basis of transcriptome sequencing, an expression vector comprising the promoter, a recombination strain obtained by transforming a host cell Corynebacterium glutamicum using the expression vector, and applications thereof.

A recombinant P5 promoter having an insertion of an exogenous spacer between the REP binding site and a transcription start site-localized Ying-Yang 1 (YY1) binding site is described, wherein said recombinant P5 promoter provides for a reduction in DNA contamination upstream of the P5 promoter without a concomitant reduction in viral titer.

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.

The present disclosure generally relates to, inter alia, a new class of chimeric Notch receptors containing a fully humanized transcriptional effector, engineered to modulate gene expression and cellular activities in a ligand-dependent manner. The new chimeric Notch receptors surprisingly retain the ability to transduce signals in response to ligand binding despite that the Notch extracellular subunit (NEC), which includes the negative regulatory region (NRR) previously believed to be essential for the functioning of Notch receptors is completely absent. In addition, the new receptors described herein incorporate an extracellular oligomerization domain to promote oligomer formation of the chimeric receptors. Also provided are compositions and methods useful for producing such receptors, nucleic acids encoding same, engineered cells genetically modified with the nucleic acids, as well as methods for modulating an activity of a cell and/or for the treatment of various diseases such as cancers.

A new promoter comprising: (i) an hCMV enhancer sequence; (ii) an hCMV promoter sequence; (iii) a splice donor region; (iv) a cell-derived enhancer sequence; and (v) a splice acceptor region.

The invention provides various reverse genetics systems for producing segmented RNA viruses, wherein the systems do not require bacteria for propagation of all of their expression constructs.

A gene editing nuclease expression cassette is provided which comprises a nucleic acid sequence comprising a nuclease coding sequence which is operably linked to regulatory sequences which direct expression of the nuclease following delivery to a host cell, wherein the regulatory sequences comprise a weak promoter. A vector is provided comprising the gene editing nuclease expression cassette. Also provided are compositions containing same and methods of use.

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.