Kinetochore stretching inactivates the spindle assembly checkpoint.
Kinetochore stretching inactivates the spindle assembly checkpoint.
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DOI:
10.1083/jcb.200811028
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发表时间:
2009-02-09
期刊:
影响因子:
--
通讯作者:
Hirota T
中科院分区:
文献类型:
--
作者:
Uchida KS;Takagaki K;Kumada K;Hirayama Y;Noda T;Hirota T
The spindle assembly checkpoint (SAC) monitors the attachment of microtubules to the kinetochore and inhibits anaphase when microtubule binding is incomplete. The SAC might also respond to tension; however, how cells can sense tension and whether its detection is important to satisfy the SAC remain controversial. We generated a HeLa cell line in which two components of the kinetochore, centromere protein A and Mis12, are labeled with green and red fluorophores, respectively. Live cell imaging of these cells reveals repetitive cycles of kinetochore extension and recoiling after biorientation. Under conditions in which kinetochore stretching is suppressed, cells fail to silence the SAC and enter anaphase after a delay, regardless of centromere stretching. Monitoring cyclin B levels as a readout for anaphase-promoting complex/cyclosome activity, we find that suppression of kinetochore stretching delays and decelerates cyclin B degradation. These observations suggest that the SAC monitors stretching of kinetochores rather than centromeres and that kinetochore stretching promotes silencing of the SAC signal.
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影响因子:
5.3
作者:
Watrin, E;Legagneux, V
通讯作者:
Legagneux, V
影响因子:
7.8
作者:
RIEDER, CL;COLE, RW;KHODJAKOV, A;SLUDER, G
通讯作者:
SLUDER, G
影响因子:
7.8
作者:
Hagting, Anja;Den Elzen, Nicole;Vodermaier, Hartmut C;Waizenegger, Irene C;Peters, Jan-Michael;Pines, Jonathon
通讯作者:
Pines, Jonathon
DOI:
10.1083/jcb.200801038
发表时间:
2008-10-06
期刊:
The Journal of cell biology
影响因子:
--
作者:
O'Connell CB;Loncarek J;Hergert P;Kourtidis A;Conklin DS;Khodjakov A
通讯作者:
Khodjakov A
影响因子:
4.8
作者:
Ciferri, C;De Luca, J;Musacchio, A
通讯作者:
Musacchio, A