Microtubule attachment and spindle assembly checkpoint signalling at the kinetochore.

Microtubule attachment and spindle assembly checkpoint signalling at the kinetochore.
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DOI:
10.1038/nrm3494
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发表时间:
2013-01
期刊:
Nature reviews. Molecular cell biology
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其他
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在真核生物中,细胞分裂过程中染色体的分离是由着丝粒DNA上的蛋白质组装而成的。着丝粒将染色体附着到纺锤体微管上,调节这些附着的稳定性,并将微管结合状态传递到纺锤体组装检查点,这是一种细胞周期监视途径,其延迟响应于未附着的着丝粒的染色体分离。在这里,我们讨论了最近的结果,指导目前的思想,这些kinetochore为中心的过程是如何实现的,以及它们的整合如何确保忠实的染色体分离,集中在激酶磷酸酶信号和微管结合KMN蛋白网络的重要作用。
In eukaryotes, chromosome segregation during cell division is facilitated by the kinetochore, an assembly of proteins built on centromeric DNA. The kinetochore attaches chromosomes to spindle microtubules, modulates the stability of these attachments, and relays microtubule-binding status to the spindle assembly checkpoint, a cell cycle surveillance pathway that delays chromosome segregation in response to unattached kinetochores. Here, we discuss recent results that guide current thinking on how each of these kinetochore-centered processes is achieved, and how their integration ensures faithful chromosome segregation, focusing on the essential roles of kinase-phosphatase signaling and the microtubule-binding KMN protein network.
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