USP7 counteracts SCFbetaTrCP- but not APCCdh1-mediated proteolysis of Claspin.
USP7 counteracts SCFbetaTrCP- but not APCCdh1-mediated proteolysis of Claspin.
复制标题
USP7抵消了SCFBETATATRCP-,但不反对APCCDH1介导的链蛋白蛋白水解。
DOI:
10.1083/jcb.200807137
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发表时间:
2009-01-12
期刊:
影响因子:
--
通讯作者:
Mailand N
中科院分区:
文献类型:
--
作者:
Faustrup H;Bekker-Jensen S;Bartek J;Lukas J;Mailand N
Claspin is an adaptor protein that facilitates the ataxia telangiectasia and Rad3-related (ATR)-mediated phosphorylation and activation of Chk1, a key effector kinase in the DNA damage response. Efficient termination of Chk1 signaling in mitosis and during checkpoint recovery requires SCFβTrCP-dependent destruction of Claspin. Here, we identify the deubiquitylating enzyme ubiquitin-specific protease 7 (USP7) as a novel regulator of Claspin stability. Claspin and USP7 interact in vivo, and USP7 is required to maintain steady-state levels of Claspin. Furthermore, USP7-mediated deubiquitylation markedly prolongs the half-life of Claspin, which in turn increases the magnitude and duration of Chk1 phosphorylation in response to genotoxic stress. Finally, we find that in addition to the M phase–specific, SCFβTrCP-mediated degradation, Claspin is destabilized by the anaphase-promoting complex (APC) and thus remains unstable in G1. Importantly, we demonstrate that USP7 specifically opposes the SCFβTrCP- but not APCCdh1-mediated degradation of Claspin. Thus, Claspin turnover is controlled by multiple ubiquitylation and deubiquitylation activities, which together provide a flexible means to regulate the ATR–Chk1 pathway.
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影响因子:
5.3
作者:
Sorensen, CS;Lukas, C;Lukas, J
通讯作者:
Lukas, J
DOI:
10.1083/jcb.200510130
发表时间:
2006-04-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bekker-Jensen S;Lukas C;Kitagawa R;Melander F;Kastan MB;Bartek J;Lukas J
通讯作者:
Lukas J
影响因子:
64.5
作者:
Bassermann, Florian;Frescas, David;Guardavaccaro, Daniele;Busino, Luca;Peschiaroli, Angelo;Pagano, Michele
通讯作者:
Pagano, Michele
影响因子:
9.2
作者:
Mamely, Ivan;van Vugt, Marcel A. T. M.;Freire, Raimundo
通讯作者:
Freire, Raimundo
影响因子:
16
作者:
Nijman, SMB;Huang, TT;Bernards, R
通讯作者:
Bernards, R