Abstract：
:Histone H2B monoubiquitination (H2Bub1) is centrally involved in gene regulation. The deubiquitination module (DUBm) of the SAGA complex is a major regulator of global H2Bub1 levels, and components of this DUBm are linked to both neurodegenerative diseases and cancer. Unexpectedly, we find that ablation of USP22, the enzymatic center of the DUBm, leads to a reduction, rather than an increase, in global H2bub1 levels. In contrast, depletion of non-enzymatic components, ATXN7L3 or ENY2, results in increased H2Bub1. These observations led us to discover two H2Bub1 DUBs, USP27X and USP51, which function independently of SAGA and compete with USP22 for ATXN7L3 and ENY2 for activity. Like USP22, USP51 and USP27X are required for normal cell proliferation, and their depletion suppresses tumor growth. Our results reveal that ATXN7L3 and ENY2 orchestrate activities of multiple deubiquitinating enzymes and that imbalances in these activities likely potentiate human diseases including cancer.
journal_name
Mol Celljournal_title
Molecular cellauthors
Atanassov BS,Mohan RD,Lan X,Kuang X,Lu Y,Lin K,McIvor E,Li W,Zhang Y,Florens L,Byrum SD,Mackintosh SG,Calhoun-Davis T,Koutelou E,Wang L,Tang DG,Tackett AJ,Washburn MP,Workman JL,Dent SYdoi
10.1016/j.molcel.2016.03.030subject
Has Abstractpub_date
2016-05-19 00:00:00pages
558-71issue
4eissn
1097-2765issn
1097-4164pii
S1097-2765(16)30013-2journal_volume
62pub_type
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