Cep164 mediates vesicular docking to the mother centriole during early steps of ciliogenesis.

Cep164 mediates vesicular docking to the mother centriole during early steps of ciliogenesis.
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DOI:
10.1083/jcb.201202126
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发表时间:
2012-12-24
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Pereira G
Pereira G
中科院分区:
其他
文献类型:
--
作者:
Schmidt KN;Kuhns S;Neuner A;Hub B;Zentgraf H;Pereira G

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Cep164通过与GEF Rabin 8和GTcR Rab8相互作用,提供了母亲中心粒和睫状膜生物发生机制之间的分子联系。纤毛的形成是一个多步骤的过程,首先是在母中心粒的远端部分对接囊泡。这一步骤标志着中心粒母体向基体的转化,轴丝微管从基体延伸形成纤毛室。囊泡是如何稳定地附着在中心粒上以启动睫状膜的生物发生的尚不清楚。在这里,我们调查的分子作用的母亲中心粒组件Cep164纤毛发生。我们表明,Cep164是不可缺少的对接囊泡在母亲中心粒。使用生化和功能测定,我们确定了囊泡运输机械,GEF Rabin8和GTTRab8,作为Cep164的相互作用的合作伙伴的组件。我们建议,Cep164的目标是母亲中心粒的顶端域提供母亲中心粒和膜生物发生机制,启动纤毛形成之间的分子联系。
Cep164 provides a molecular link between the mother centriole and the ciliary membrane biogenesis machinery by interacting with the GEF Rabin8 and the GTPase Rab8. Cilia formation is a multi-step process that starts with the docking of a vesicle at the distal part of the mother centriole. This step marks the conversion of the mother centriole into the basal body, from which axonemal microtubules extend to form the ciliary compartment. How vesicles are stably attached to the mother centriole to initiate ciliary membrane biogenesis is unknown. Here, we investigate the molecular role of the mother centriolar component Cep164 in ciliogenesis. We show that Cep164 was indispensable for the docking of vesicles at the mother centriole. Using biochemical and functional assays, we identified the components of the vesicular transport machinery, the GEF Rabin8 and the GTPase Rab8, as interacting partners of Cep164. We propose that Cep164 is targeted to the apical domain of the mother centriole to provide the molecular link between the mother centriole and the membrane biogenesis machinery that initiates cilia formation.
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