Androgen-induced Recruitment of RNA Polymerase II to a Nuclear Receptor–p160 Coactivator Complex

Authors

Maggie C. Louie, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at DavisFollow
Hong Qiong Yang, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at Davis
Ai-Hong Ma, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at Davis
Wei Xu, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at Davis
June X. Zou, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at DavisFollow
Hsing-Jien Kung, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at Davis
Hong-Wu Chen, Department of Biological Chemistry, University of California at Davis Cancer Center/Basic Science, University of California at DavisFollow

Document Type

Article

Source

Proceedings of the National Academy of Sciences

ISSN

1091-6490

Volume

100

Issue

5

First Page

2226

Last Page

2230

Publication Date

3-4-2003

Department

Natural Sciences and Mathematics

Abstract

The androgen receptor, like other nuclear receptors, activates target genes by binding to hormone-responsive enhancers. Here we demonstrate that androgen induces robust recruitment of androgen receptor, members of the p160 coactivator family, and CREB-binding protein/p300 specifically at the distant enhancer of prostate-specific antigen (PSA) gene. Unexpectedly, we found that RNA polymerase II (Pol II) is directly recruited to the enhancer in a hormone-dependent manner, independent of the proximal promoter, and that the isolated PSA enhancer can mediate efficient androgen induction of transcription. Inhibition of the Pol II carboxyl-terminal domain kinase activity with low concentrations of flavopiridol blocks Pol II transfer from the enhancer to the promoter and selectively abolishes PSA induction by androgen. Moreover, elevated levels of the p160 coactivator ACTR/AIB1 increase both androgen-dependent and -independent PSA expression, by facilitating Pol II recruitment to the enhancer. These results support a model in which nuclear receptors and their coactivators mediate hormone induction by serving as a staging platform for Pol II recruitment.

Rights

Copyright © 2003 The Author(s)

PubMed ID

12589022

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.