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Mol Cell. 2007 Aug 17;27(4):609-21.

A histone H2A deubiquitinase complex coordinating histone acetylation and H1 dissociation in transcriptional regulation.

Author information

  • 1Howard Hughes Medical Institute, Department of Medicine, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.

Abstract

Deciphering the epigenetic "code" remains a central issue in transcriptional regulation. Here, we report the identification of a JAMM/MPN(+) domain-containing histone H2A deubiquitinase (2A-DUB, or KIAA1915/MYSM1) specific for monoubiquitinated H2A (uH2A) that has permitted delineation of a strategy for specific regulatory pathways of gene activation. 2A-DUB regulates transcription by coordinating histone acetylation and deubiquitination, and destabilizing the association of linker histone H1 with nucleosomes. 2A-DUB interacts with p/CAF in a coregulatory protein complex, with its deubiquitinase activity modulated by the status of acetylation of nucleosomal histones. Consistent with this mechanistic role, 2A-DUB participates in transcriptional regulation events in androgen receptor-dependent gene activation, and the levels of uH2A are dramatically decreased in prostate tumors, serving as a cancer-related mark. We suggest that H2A ubiquitination represents a widely used mechanism for many regulatory transcriptional programs and predict that various H2A ubiquitin ligases/deubiquitinases will be identified for specific cohorts of regulated transcription units.

PMID:
17707232
[PubMed - indexed for MEDLINE]
PMCID:
PMC2709280
Free PMC Article

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