Centrobin: a novel daughter centriole-associated protein that is required for centriole duplication.

Centrobin: a novel daughter centriole-associated protein that is required for centriole duplication.
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DOI:
10.1083/jcb.200506185
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发表时间:
2005-11-07
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Gao Q
Gao Q
中科院分区:
其他
文献类型:
--
作者:
Zou C;Li J;Bai Y;Gunning WT;Wazer DE;Band V;Gao Q

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在哺乳动物细胞中,中心体由一对中心粒和无定形的着丝点周围物质组成。这对中心粒是中心体的核心组成部分,每个细胞周期复制一次。在有丝分裂过程中,中心体在协调双极纺锤体的形成中起着关键作用。最近的研究已经将中心粒或中心粒相关结构上的中心体活动与细胞质分裂和细胞周期进程联系在一起,通过G1进入S阶段。在这项研究中,我们已经确定Centrobin是一种中心粒相关蛋白,它不对称地定位于女儿中心粒。小干扰RNA沉默了中心粒的表达,抑制了中心粒的复制,导致中心体只有一个中心粒或没有中心粒,这表明中心粒的复制需要中心粒。此外,中央知母蛋白的缺失对中心粒复制的抑制导致胞质分裂受损。
In mammalian cells, the centrosome consists of a pair of centrioles and amorphous pericentriolar material. The pair of centrioles, which are the core components of the centrosome, duplicate once per cell cycle. Centrosomes play a pivotal role in orchestrating the formation of the bipolar spindle during mitosis. Recent studies have linked centrosomal activity on centrioles or centriole-associated structures to cytokinesis and cell cycle progression through G1 into the S phase. In this study, we have identified centrobin as a centriole-associated protein that asymmetrically localizes to the daughter centriole. The silencing of centrobin expression by small interfering RNA inhibited centriole duplication and resulted in centrosomes with one or no centriole, demonstrating that centrobin is required for centriole duplication. Furthermore, inhibition of centriole duplication by centrobin depletion led to impaired cytokinesis.
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