A TFTC/STAGA Module Mediates Histone H2A and H2B Deubiquitination, Coactivates Nuclear Receptors, and Counteracts Heterochromatin Silencing

Yue Zhao, Guillaume Lang, Saya Ito, Jacques Bonnet, Eric Metzger, Shun Sawatsubashi, Eriko Suzuki, Xavier Le Guezennec, Hendrik G. Stunnenberg, Aleksey Krasnov, Sofia G. Georgieva, Roland Schüle, Ken Ichi Takeyama, Shigeaki Kato, László Tora, Didier Devys

Onderzoeksoutput: Bijdrage aan tijdschriftArtikelpeer review

312 Citaten (Scopus)

Samenvatting

Transcriptional activators, several different coactivators, and general transcription factors are necessary to access specific loci in the dense chromatin structure to allow precise initiation of RNA polymerase II (Pol II) transcription. Histone acetyltransferase (HAT) complexes were implicated in loosening the chromatin around promoters and thus in gene activation. Here we demonstrate that the 2 MDa GCN5 HAT-containing metazoan TFTC/STAGA complexes contain a histone H2A and H2B deubiquitinase activity. We have identified three additional subunits of TFTC/STAGA (ATXN7L3, USP22, and ENY2) that form the deubiquitination module. Importantly, we found that this module is an enhancer of position effect variegation in Drosophila. Furthermore, we demonstrate that ATXN7L3, USP22, and ENY2 are required as cofactors for the full transcriptional activity by nuclear receptors. Thus, the deubiquitinase activity of the TFTC/STAGA HAT complex is necessary to counteract heterochromatin silencing and acts as a positive cofactor for activation by nuclear receptors in vivo.

Originele taal-2Engels
Pagina's (van-tot)92-101
Aantal pagina's10
TijdschriftMolecular Cell
Volume29
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 18 jan. 2008
Extern gepubliceerdJa

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