Cep164, a novel centriole appendage protein required for primary cilium formation.

Cep164, a novel centriole appendage protein required for primary cilium formation.
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DOI:
10.1083/jcb.200707181
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发表时间:
2007-10-22
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Nigg EA
Nigg EA
中科院分区:
其他
文献类型:
--
作者:
Graser S;Stierhof YD;Lavoie SB;Gassner OS;Lamla S;Le Clech M;Nigg EA

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初级纤毛(PC)的功能是从许多真核细胞表面伸出的基于微管的感觉天线。它们在机械和化学感觉知觉中发挥重要作用,它们的功能障碍与发育障碍和严重疾病有关。在PC装配中起作用的基体来自成熟的中心粒,中心粒的一个组成部分。通过一个小的干扰RNA筛选,我们发现几个中心体蛋白(Ceps)参与PC的形成。一个新发现的蛋白质,Cep 164,是必不可少的PC的形成,因此,详细的特点。免疫金电镜显示Cep 164定位于成熟中心粒的远端附属物。相反,ninein和Cep 170,两个组件的近远侧附属物,Cep 164坚持在整个有丝分裂的中心粒。此外,Cep 164和ninein/Cep 170在间期的定位是相互独立的。这些数据暗示PC形成的远端附件,并确定Cep 164作为这些结构的一个很好的标记。
Primary cilia (PC) function as microtubule-based sensory antennae projecting from the surface of many eukaryotic cells. They play important roles in mechano- and chemosensory perception and their dysfunction is implicated in developmental disorders and severe diseases. The basal body that functions in PC assembly is derived from the mature centriole, a component of the centrosome. Through a small interfering RNA screen we found several centrosomal proteins (Ceps) to be involved in PC formation. One newly identified protein, Cep164, was indispensable for PC formation and hence characterized in detail. By immunogold electron microscopy, Cep164 could be localized to the distal appendages of mature centrioles. In contrast to ninein and Cep170, two components of subdistal appendages, Cep164 persisted at centrioles throughout mitosis. Moreover, the localizations of Cep164 and ninein/Cep170 were mutually independent during interphase. These data implicate distal appendages in PC formation and identify Cep164 as an excellent marker for these structures.
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