A role for CREB binding protein and p300 transcriptional coactivators in Ets-1 transactivation functions.

Molecular and Cellular Biology
C YangP K Brindle

Abstract

The Ets-1 transcription factor plays a critical role in cell growth and development, but the means by which it activates transcription are still unclear (J. C. Bories, D. M. Willerford, D. Grevin, L. Davidson, A. Camus, P. Martin, D. Stehelin, F. W. Alt, and J. C. Borles, Nature 377:635-638, 1995; N. Muthusamy, K. Barton, and J. M. Leiden, Nature 377:639-642, 1995). Here we show that Ets-1 binds the transcriptional coactivators CREB binding protein (CBP) and the related p300 protein (together referred to as CBP/p300) and that this interaction is required for specific Ets-1 transactivation functions. The Ets-1- and c-Myb-dependent aminopeptidase N (CD13/APN) promoter and an Ets-1-dependent artificial promoter were repressed by adenovirus E1A, a CBP/p300-specific inhibitor. Furthermore, Ets-1 activity was potentiated by CBP and p300 overexpression. The transactivation function of Ets-1 correlated with its ability to bind an N-terminal cysteine- and histidine-rich region spanning CBP residues 313 to 452. Ets-1 also bound a second cysteine- and histidine-rich region of CBP, between residues 1449 and 1892. Both Ets-1 and CBP/p300 formed a stable immunoprecipitable nuclear complex, independent of DNA binding. This Ets-1-CBP/p300 immu...Continue Reading

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Citations

Sep 22, 2010·The Journal of Experimental Medicine·Enguerran MoulyJean-Christophe Bories
Jul 8, 2015·Proceedings of the National Academy of Sciences of the United States of America·Janyaporn PhuchareonOsamu Tetsu
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