The APC/C maintains the spindle assembly checkpoint by targeting Cdc20 for destruction.
The APC/C maintains the spindle assembly checkpoint by targeting Cdc20 for destruction.
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DOI:
10.1038/ncb1799
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发表时间:
2008-12
影响因子:
21.3
通讯作者:
Pines, Jonathon
中科院分区:
文献类型:
--
作者:
Nilsson, Jakob;Yekezare, Mona;Minshull, Jeremy;Pines, Jonathon
The Spindle Assembly Checkpoint (SAC) is required to block sister chromatid separation until all chromosomes are properly attached to the mitotic apparatus. The SAC prevents cells entering anaphase by inhibiting the ubiquitination of cyclin B1 and securin by the Anaphase Promoting Complex/Cyclosome (APC/C) ubiquitin ligase. The target of the SAC is the essential APC/C activator, Cdc20. It is unclear how the SAC inactivates Cdc20 but current models mostly involve Cdc20 forming a stable complex with the Mad2 checkpoint protein. Here we show that most Cdc20 is not in a complex with Mad2; instead Mad2 is required for Cdc20 to form a complex with another checkpoint protein, BubR1. We further show that during the SAC the APC/C ubiquitinates Cdc20 to target it for degradation. Thus, ubiquitination of human Cdc20 is not required to release it from the checkpoint complex, but to degrade it to maintain mitotic arrest.
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影响因子:
7.8
作者:
Kallio, Marko J;Beardmore, Victoria A;Weinstein, Jasminder;Gorbsky, Gary J
通讯作者:
Gorbsky, Gary J
影响因子:
5.3
作者:
Millband, DN;Hardwick, KG
通讯作者:
Hardwick, KG
影响因子:
21.3
作者:
Acquaviva, C;Herzog, F;Pines, J
通讯作者:
Pines, J
DOI:
10.1083/jcb.153.1.137
发表时间:
2001-04-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Geley S;Kramer E;Gieffers C;Gannon J;Peters JM;Hunt T
通讯作者:
Hunt T
影响因子:
11.4
作者:
Schwab, M;Neutzner, M;Seufert, W
通讯作者:
Seufert, W