Sensing centromere tension: Aurora B and the regulation of kinetochore function.

Sensing centromere tension: Aurora B and the regulation of kinetochore function.
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DOI:
10.1016/j.tcb.2010.10.007
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发表时间:
2011-03
影响因子:
19
通讯作者:
Cheeseman, Iain M.
Cheeseman, Iain M.
中科院分区:
生物学1区
文献类型:
--
作者:
Lampson, Michael A.;Cheeseman, Iain M.

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在细胞分裂过程中维持基因组的完整性需要染色体和纺锤体微管之间的相互作用。为了确保子细胞继承正确的染色体,姐妹着丝粒必须附着在相反的纺锤体两极。穿过着丝粒的张力稳定正确的附着,而保守的Ipl 1/Aurora B激酶对动粒底物的磷酸化选择性地消除不正确的附着。在这里,我们回顾我们目前的理解,机械力作用于动粒是如何与生化变化控制染色体分离。我们讨论模型的张力传感和调节下游的极光B,和机制,指定极光B本地化的内部着丝粒,并确定其与基板在不同的位置的相互作用。
Maintaining genome integrity during cell division requires regulated interactions between chromosomes and spindle microtubules. To ensure that daughter cells inherit the correct chromosomes, the sister kinetochores must attach to opposite spindle poles. Tension across the centromere stabilizes correct attachments, while phosphorylation of kinetochore substrates by the conserved Ipl1/Aurora B kinase selectively eliminates incorrect attachments. Here, we review our current understanding of how mechanical forces acting on the kinetochore are linked to biochemical changes to control chromosome segregation. We discuss models for tension sensing and regulation of kinetochore function downstream of Aurora B, and mechanisms that specify Aurora B localization to the inner centromere and determine its interactions with substrates at distinct locations.
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