The BioGRID | PUBLICATION VIEW

	Proc. Natl. Acad. Sci. U.S.A. Dec (1996); 93(26):15092-6
Two contact regions between Stat1 and CBP/p300 in interferon gamma signaling.
Zhang JJ, Vinkemeier U, Gu W, Chakravarti D, Horvath CM, Darnell JE
Laboratory of Molecular Cell Biology, Rockefeller University, New York, NY 10021, USA.
Abstract: Interferon gamma (IFN-gamma) induces rapid tyrosine phosphorylation of the latent cytoplasmic transcription factor, Stat1, which then forms homodimers, translocates to the nucleus and participates in IFN-gamma-induced transcription. However, little is known of the interactions between Stat1 and the general transcription machinery during transcriptional activation. We show here that Stat1 can directly interact with the CREB-binding protein (CBP)/p300 family of transcriptional coactivators. Specifically, two interaction regions were identified: the amino-terminal region of Stat1 interacts with the CREB-binding domain of CBP/p300 and the carboxyl-terminal region of Stat1 interacts with the domain of CBP/p300 that binds adenovirus E1A protein. Transfection experiments suggest a role for these interactions in IFN-gamma-induced transcription. Because CBP/p300-binding is required for the adenovirus E1A protein to regulate transcription of many genes during viral replication and cellular transformation, it is possible that the anti-viral effect of IFN-gamma is based at least in part on direct competition by nuclear Stat1 with E1A for CBP/p300 binding.
[PUBMED: 8986769]