Molecular Basis for the Mechanism of Constitutive CBP/p300 Coactivator Recruitment by CRTC1-MAML2 and Its Implications in cAMP Signaling.

ABSTRACT: The cyclic AMP response element-binding protein (CREB) is a signal-dependent transcription factor that exerts its positive effects on gene transcription of a broad range of genes by recruiting coactivators, including CREB-binding protein (CBP), its paralog, p300, and the family of CRTC (CREB-regulated transcriptional coactivators) proteins. Whereas recruitment of CBP/p300 is dependent on CREB phosphorylation at Ser133, recruitment of CRTCs is not. Here we describe how both mechanisms could concurrently drive transcription of CREB targets in a subset of head and neck cancers featuring chromosomal translocations that fuse portions of CRTC1 and CRTC3 genes with that of the Mastermind-like transcriptional coactivator MAML2. We show that a peptide derived from transactivation domain 1 (TAD1) of

SUBMITTER: Clark MD 

PROVIDER: S-EPMC4564341 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature