The Mitotic Checkpoint Complex Requires an Evolutionary Conserved Cassette to Bind and Inhibit Active APC/C.
The Mitotic Checkpoint Complex Requires an Evolutionary Conserved Cassette to Bind and Inhibit Active APC/C.
复制标题
DOI:
10.1016/j.molcel.2016.11.006
复制
发表时间:
2016-12-15
期刊:
影响因子:
16
通讯作者:
Pines J
中科院分区:
文献类型:
--
作者:
Di Fiore B;Wurzenberger C;Davey NE;Pines J
The Spindle Assembly Checkpoint (SAC) ensures genomic stability by preventing sister chromatid separation until all chromosomes are attached to the spindle. It catalyzes the production of the Mitotic Checkpoint Complex (MCC), which inhibits Cdc20 to inactivate the Anaphase Promoting Complex/Cyclosome (APC/C). Here we show that two Cdc20-binding motifs in BubR1 of the recently identified ABBA motif class are crucial for the MCC to recognize active APC/C-Cdc20. Mutating these motifs eliminates MCC binding to the APC/C, thereby abolishing the SAC and preventing cells from arresting in response to microtubule poisons. These ABBA motifs flank a KEN box to form a cassette that is highly conserved through evolution, both in the arrangement and spacing of the ABBA-KEN-ABBA motifs, and association with the amino-terminal KEN box required to form the MCC. We propose that the ABBA-KEN-ABBA cassette holds the MCC onto the APC/C by binding the two Cdc20 molecules in the MCC-APC/C complex. The N-terminal half of BubR1 contains two ABBA motifs that bind Cdc20 The motifs are required for the MCC to bind and inhibit active APC/C-Cdc20 These ABBA motifs are essential for the spindle assembly checkpoint The ABBA motifs flank a KEN box to form a cassette highly conserved in evolution Di Fiore et al. show that two ABBA motifs in BubR1 are crucial for the Spindle Assembly Checkpoint because they are needed for the Mitotic Checkpoint Complex (MCC) to bind and inhibit the Anaphase Promoting Complex/Cyclosome (APC/C). Their results show how the MCC inhibits active APC/C.
登录
查看更多内容
DOI:
10.1083/jcb.200902128
发表时间:
2009-06-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Klebig C;Korinth D;Meraldi P
通讯作者:
Meraldi P
影响因子:
64.8
作者:
Alfieri, Claudio;Chang, Leifu;Zhang, Ziguo;Yang, Jing;Maslen, Sarah;Skehel, Mark;Barford, David
通讯作者:
Barford, David
DOI:
10.1083/jcb.201205170
发表时间:
2012-10-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
Izawa D;Pines J
通讯作者:
Pines J
影响因子:
11.4
作者:
Burton, Janet L.;Xiong, Yong;Solomon, Mark J.
通讯作者:
Solomon, Mark J.
影响因子:
11.8
作者:
Di Fiore B;Davey NE;Hagting A;Izawa D;Mansfeld J;Gibson TJ;Pines J
通讯作者:
Pines J