Ligand-dependent transcription activation by nuclear receptors requires the DRIP complex

Christophe Rachez, Bryan D. Lemon, Zalman Suldan, Virginia Bromleigh, Matthew Gamble, Anders M. Näär, Hediye Erdjument-Bromage, Paul Tempst and Leonard P. Freedman ()
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Christophe Rachez: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences Cornell University
Bryan D. Lemon: University of California
Zalman Suldan: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences Cornell University
Virginia Bromleigh: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences Cornell University
Matthew Gamble: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences Cornell University
Anders M. Näär: University of California
Hediye Erdjument-Bromage: Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences, Cornell University
Paul Tempst: Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences, Cornell University
Leonard P. Freedman: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, Graduate School of Medical Sciences Cornell University

Nature, 1999, vol. 398, issue 6730, 824-828

Abstract: Abstract Nuclear receptors modulate the transcription of genes in direct response to small lipophilic ligands. Binding to ligands induces conformational changes in the nuclear receptors that enable the receptors to interact with several types of cofactor that are critical for transcription activation (transactivation)1. We previously described a distinct set of ligand-dependent proteins called DRIPs, which interact with the vitamin D receptor (VDR); together, these proteins constitute a new cofactor complex2. DRIPs bind to several nuclear receptors and mediate ligand-dependent enhancement of transcription by VDR and the thyroid-hormone receptor in cell-free transcription assays2,3. Here we report the identities of thirteen DRIPs that constitute this complex, and show that the complex has a central function in hormone-dependent transactivation by VDR on chromatin templates. The DRIPs are almost indistinguishable from components of another new cofactor complex called ARC, which is recruited by other types of transcription activators to mediate transactivation on chromatin-assembled templates4,5. Several DRIP/ARC subunits are also components of other potentially related cofactors, such as CRSP6, NAT7, SMCC8 and the mouse Mediator9, indicating that unique classes of activators may share common sets or subsets of cofactors. The role of nuclear-receptor ligands may, in part, be to recruit such a cofactor complex to the receptor and, in doing so, to enhance transcription of target genes.

Date: 1999
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DOI: 10.1038/19783

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