Ofd1, a human disease gene, regulates the length and distal structure of centrioles.

Ofd1, a human disease gene, regulates the length and distal structure of centrioles.
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DOI:
10.1016/j.devcel.2009.12.022
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发表时间:
2010-03-16
期刊:
影响因子:
11.8
通讯作者:
Reiter JF
Reiter JF
中科院分区:
生物学1区
文献类型:
--
作者:
Singla V;Romaguera-Ros M;Garcia-Verdugo JM;Reiter JF

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中心体及其组成的中心粒是动物细胞的主要微管组织中心。在这里,我们展示了口腔面部指端综合征1的潜在基因,Ofd1,是控制中心粒长度的远端中心粒的一个组成部分。在没有Ofd1的情况下,中心粒的远端区域异常伸长,但不是前着丝粒。这些长中心粒在结构上与正常中心粒相似,但含有不稳定的微管,具有异常的翻译后修饰。Ofd1对鞭毛内转运蛋白Ift88的中心粒远端附属物的形成和中心粒的募集也很重要。为了在胚胎干细胞中建立OFD1综合征模型,我们用人类OFD1患者的错义等位基因替换了Ofd1基因。不同的疾病相关突变会导致不同程度的中心粒延长过度或减少,所有这些都与纤毛发生减少有关。我们的结果表明,Ofd1作用于远端中心粒,建立远端附件,招募Ift88,并将中心粒微管稳定在指定的长度。
Centrosomes and their component centrioles represent the principal microtubule organizing centers of animal cells. Here we show that the gene underlying Orofaciodigital Syndrome 1, Ofd1, is a component of the distal centriole that controls centriole length. In the absence of Ofd1, distal regions of centrioles, but not procentrioles, elongate abnormally. These long centrioles are structurally similar to normal centrioles, but contain destabilized microtubules with abnormal post-translational modifications. Ofd1 is also important for centriole distal appendage formation and centriolar recruitment of the intraflagellar transport protein Ift88. To model OFD1 Syndrome in embryonic stem cells, we replaced the Ofd1 gene with missense alleles from human OFD1 patients. Distinct disease-associated mutations cause different degrees of excessive or decreased centriole elongation, all of which are associated with diminished ciliogenesis. Our results indicate that Ofd1 acts at the distal centriole to build distal appendages, recruit Ift88, and stabilize centriolar microtubules at a defined length.
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