The conserved protein SZY-20 opposes the Plk4-related kinase ZYG-1 to limit centrosome size.

The conserved protein SZY-20 opposes the Plk4-related kinase ZYG-1 to limit centrosome size.
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DOI:
10.1016/j.devcel.2008.09.018
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发表时间:
2008-12
期刊:
影响因子:
11.8
通讯作者:
O'Connell, Kevin F.
O'Connell, Kevin F.
中科院分区:
生物学1区
文献类型:
--
作者:
Song, Mi Hye;Aravind, L.;Mueller-Reichert, Thomas;O'Connell, Kevin F.

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微管由中心体组织,中心体是一种动态的细胞器,在细胞周期中表现出大小和数量的变化。在这里,我们表明,SZY-20,一个假定的RNA结合蛋白,在限制C.优雅的。SZY-20部分定位于中心体,并且在其不存在的情况下,中心体具有增加水平的中心粒和中心粒周围组分,包括γ-微管蛋白和中心粒复制因子ZYG-1和SPD-2。这些扩大的中心体拥有正常的中心粒,使更多的微管成核,并且不能正确地指导一些微管依赖性过程。ZYG-1的缺失使szy-20突变体恢复了正常的中心体大小和功能,而szy-20的缺失抑制了zyg-1和spd-2突变体中的中心体复制缺陷。我们的研究结果描述了一条决定中心体大小的途径,并在此过程中涉及中心粒复制因子。
Microtubules are organized by the centrosome, a dynamic organelle that exhibits changes in both size and number during the cell cycle. Here we show that SZY-20, a putative RNA-binding protein, plays a critical role in limiting centrosome size in C. elegans. SZY-20 localizes in part to centrosomes and in its absence centrosomes possess increased levels of centriolar and pericentriolar components including γ-tubulin and the centriole duplication factors ZYG-1 and SPD-2. These enlarged centrosomes possess normal centrioles, nucleate more microtubules, and fail to properly direct a number of microtubule-dependent processes. Depletion of ZYG-1 restores normal centrosome size and function to szy-20 mutants whereas loss of szy-20 suppresses the centrosome duplication defects in both zyg-1 and spd-2 mutants. Our results describe a pathway that determines centrosome size and implicate centriole duplication factors in this process.
DOI: 10.1083/jcb.105.5.2123
发表时间: 1987-11
期刊: The Journal of cell biology
影响因子: --
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