期刊
EMBO REPORTS
卷 12, 期 4, 页码 365-372出版社
WILEY
DOI: 10.1038/embor.2011.33
关键词
regulation; structure; Ubl; USP4
资金
- European Union Network of Excellence
- Dutch Cancer Society [KWF 2008-4014]
USP4 is a member of the ubiquitin-specific protease (USP) family of deubiquitinating enzymes that has a role in spliceosome regulation. Here, we show that the crystal structure of the minimal catalytic domain of USP4 has the conserved USP-like fold with its typical ubiquitin-binding site. A ubiquitin-like (Ubl) domain inserted into the catalytic domain has autoregulatory function. This Ubl domain can bind to the catalytic domain and compete with the ubiquitin substrate, partially inhibiting USP4 activity against different substrates. Interestingly, other USPs, such as USP39, could relieve this inhibition.
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