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1: J Biol Chem. 1999 Mar 19;274(12):7623-6.Click here to read Links

The B subunit of the CAAT-binding factor NFY binds the central segment of the Co-activator p300.

Faniello MC, Bevilacqua MA, Condorelli G, de Crombrugghe B, Maity SN, Avvedimento VE, Cimino F, Costanzo F.

Dipartimento di Biochimica e Biotecnologie Mediche, Università degli Studi di Napoli 'Federico II', Via S. Pansini 5, I-80131 Napoli, Italy.

We report that the heterotrimeric transcription factor NFY or "CAAT-binding factor" binds the -60 region of the human H ferritin promoter, the B site. DNA binding analysis with specific antibodies demonstrates that NFY/B/C subunits tightly bind this site and that NFY/C subunit is masked in vivo by binding with other protein(s). NFY binds the co-activator p300. Specifically, the NFY/B subunit interacts with the central segment of p300 in vivo and in vitro. cAMP substantially increases the formation of the NFY.p300 complex. Taken together these data provide a general model of cAMP induction of non-CRE-containing promoters and suggest that the NFY-B.p300 complex is located at the 5' end of the promoter and the NFY-B.C. TFIIB on the 3' end toward the transcription start site.

PMID: 10075648 [PubMed - indexed for MEDLINE]