Overly long centrioles and defective cell division upon excess of the SAS-4-related protein CPAP.

Overly long centrioles and defective cell division upon excess of the SAS-4-related protein CPAP.
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SAS-4 相关蛋白 CPAP 过量时,中心粒过长,细胞分裂有缺陷。

DOI:
10.1016/j.cub.2009.05.018
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发表时间:
2009-06-23
期刊:
影响因子:
9.2
通讯作者:
Goenczy, Pierre
Goenczy, Pierre
中科院分区:
生物学1区
文献类型:
--
作者:
Kohlmaier, Gregor;Loncarek, Jadranka;Meng, Xing;McEwen, Bruce F.;Mogensen, Mette M.;Spektor, Alexander;Dynlacht, Brian D.;Khodjakov, Alexey;Goenczy, Pierre

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中心体是动物细胞中主要的微管组织中心。精确的中心体复制是基因组完整性的基础,并且需要在每个细胞周期中在每个现有中心粒旁边形成一个原中心粒。然后原中心粒伸长,最终达到与中心粒相同的大小。支配中心粒圆柱体伸长的机制及其与细胞分裂的潜在相关性尚不清楚。在这里,我们表明,SAS-4相关的蛋白CPAP是所需的中心体复制周期的人类细胞。此外,我们证明CPAP过度表达导致异常长中心粒的形成。这也促进了在这种过长的中心粒附近形成一个以上的原中心粒,最终导致额外的MTOC的存在。这反过来又导致多极纺锤体组装和胞质分裂缺陷。总的来说,我们的研究结果表明,中心粒的长度必须仔细调节,以限制原中心粒的数量,从而确保准确的细胞分裂。
The centrosome is the principal microtubule organizing center (MTOC) of animal cells. Accurate centrosome duplication is fundamental for genome integrity and entails the formation of one procentriole next to each existing centriole, once per cell cycle. The procentriole then elongates to eventually reach the same size as that of the centriole. The mechanisms that govern elongation of the centriolar cylinder and their potential relevance for cell division are not known. Here, we show that the SAS-4-related protein CPAP is required for centrosome duplication in cycling human cells. Furthermore, we demonstrate that CPAP overexpression results in the formation of abnormal long centrioles. This also promotes formation of more than one procentriole in the vicinity of such overly long centrioles, eventually resulting in the presence of supernumerary MTOCs. This in turn leads to multipolar spindle assembly and cytokinesis defects. Overall, our findings suggest that centriole length must be carefully regulated to restrict procentriole number and thus ensure accurate cell division.
DOI: 10.1091/mbc.e08-06-0619
发表时间: 2009-02-01
影响因子: 3.3
作者:
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期刊: CURRENT BIOLOGY
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