Five discrete cis-active domains direct cell type-specific transcription of the vasoactive intestinal peptide (VIP) gene.

The Journal of Biological Chemistry
S H Hahm, L E Eiden

Abstract

Vasoactive intestinal peptide (VIP) is a neuromodulator expressed with great anatomical specificity throughout the nervous system. Cell-specific expression of the VIP gene is mediated by a tissue specifier element (TSE) located within a 2.7-kilobase (kb) region between -5.2 and -2.5 kb upstream from the transcription start site, and requires an intact promoter proximal VIP-CRE (cyclic AMP-responsive element) (Hahm, S. H., and Eiden, L. E. (1997) J. Neurochem. 67, 1872-1881). We now report that the TSE comprises a 425-base pair domain located between -4.7 and -4.2 kb containing two AT-rich octamer-like sequences. The 425-base pair TSE is sufficient to provide full cell-specific regulation of the VIP gene, when fused to the 5' proximal 1.55 kb of the VIP gene. Mutational analysis and gel shift assays of these octamer-like sequences indicate that the binding of proteins related to the ubiquitously expressed POU-homeodomain proteins Oct-1 and/or Oct-2 to these octamer-like sequences plays a central role for the function of the TSE. The TSE interacts with three additional discrete domains besides the cAMP response element, which are located within the proximal 1.55 kb of the VIP gene, to provide cell-specific expression. An upstream...Continue Reading

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Citations

Oct 16, 2002·Biochemical and Biophysical Research Communications·William J HurstMartha U Gillette
Feb 3, 1999·Annals of the New York Academy of Sciences·S H Hahm, L E Eiden
May 26, 2001·Biochemical and Biophysical Research Communications·D LiuJ A Waschek
Mar 19, 2011·FEBS Letters·Andries KalsbeekRuud M Buijs
Sep 27, 2006·Experimental Neurology·Yu LuoHoward J Federoff

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