Deuterosome-mediated centriole biogenesis.

Deuterosome-mediated centriole biogenesis.
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DOI:
10.1016/j.devcel.2013.08.021
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发表时间:
2013-10-14
期刊:
影响因子:
11.8
通讯作者:
Mitchell, Brian J.
Mitchell, Brian J.
中科院分区:
生物学1区
文献类型:
--
作者:
Dehring, Deborah A. Klos;Vladar, Eszter K.;Werner, Michael E.;Mitchell, Jennifer W.;Hwang, Peter;Mitchell, Brian J.

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细胞在每个细胞周期忠实地复制两个中心粒一次的能力对于正确的有丝分裂进程和染色体分离至关重要。多纤毛细胞代表了中心粒复制的一个有趣的变化,因为这些细胞产生超过100个中心粒,形成其运动纤毛的基体。这种中心粒扩增被认为需要一种被称为后体的结构,后体被认为能够促进从头中心粒生物发生。在这里,我们开始的分子特征的后体,并确定它作为一个网站的本地化Cep152,Plk4,和SAS 6。此外,我们确定CCDC78作为中心粒相关和后体蛋白,是中心粒扩增所必需的。Cep152的过表达,而不是Plk4、SAS6或CCDC78的过表达,驱动中心粒的过度扩增。然而,在CCDC78 morphants,Cep152未能本地化的后体和中心粒生物发生受损,表明CCDC78介导的招聘Cep152是需要后体介导的中心粒生物发生。
The ability of cells to faithfully duplicate their two centrioles once per cell cycle is critical for proper mitotic progression and chromosome segregation. Multi-ciliated cells represent an interesting variation of centriole duplication in that these cells generate greater than 100 centrioles, which form the basal bodies of their motile cilia. This centriole amplification is proposed to require a structure termed the deuterosome, thought to be capable of promoting de novo centriole biogenesis. Here, we begin to molecularly characterize the deuterosome and identify it as a site for the localization of Cep152, Plk4, and SAS6. Additionally we identify CCDC78 as a centriole-associated and deuterosome protein that is essential for centriole amplification. Overexpression of Cep152, but not Plk4, SAS6 or CCDC78, drives over-amplification of centrioles. However, in CCDC78 morphants, Cep152 fails to localize to the deuterosome and centriole biogenesis is impaired, indicating CCDC78-mediated recruitment of Cep152 is required for deuterosome-mediated centriole biogenesis.
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