Roles for CEP170 in cilia function and dynein-2 assembly.

Roles for CEP170 in cilia function and dynein-2 assembly.
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CEP170 在纤毛功能和动力蛋白 2 组装中的作用。

DOI:
10.1101/2023.11.20.567836
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发表时间:
2023
期刊:
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影响因子:
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通讯作者:
Weijman J
Weijman J
中科院分区:
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文献类型:
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作者:
Weijman J

文献摘要

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初级纤毛是真核生物中信号传导和分泌所必需的细胞器。动力蛋白-2是一种微管-马达蛋白复合物,通过其促进从纤毛尖端到细胞体的逆行鞭毛内转运(IFT)的作用而为纤毛发生所需。动力蛋白-2必须组装并加载到IFT列车上以进入纤毛,但动力蛋白-2如何组装以及如何回收到纤毛中仍然知之甚少。在这里,我们确定中心体蛋白170 kDa(CEP 170)作为一个动力蛋白2在哺乳动物细胞中的相互作用蛋白。我们发现,CEP 170的损失扰乱鞭毛内运输和刺猬信号,并改变动力蛋白2全酶复合物的稳定性。总之,我们的数据表明CEP 170在支持纤毛功能和动力蛋白-2组装中的作用。
Primary cilia are essential eukaryotic organelles required for signalling and secretion. Dynein-2 is a microtubule-motor protein complex and is required for ciliogenesis via its role in facilitating retrograde intraflagellar transport (IFT) from the cilia tip to the cell body. Dynein-2 must be assembled and loaded onto IFT trains for entry into cilia for this process to occur, but how dynein-2 is assembled and how it is recycled back into a cilium remain poorly understood. Here, we identify centrosomal protein of 170 kDa (CEP170) as a dynein-2-interacting protein in mammalian cells. We show that loss of CEP170 perturbs intraflagellar transport and hedgehog signalling, and alters the stability of dynein-2 holoenzyme complex. Together, our data indicate a role for CEP170 in supporting cilia function and dynein-2 assembly.