Neurl4, a novel daughter centriole protein, prevents formation of ectopic microtubule organizing centres

Neurl4, a novel daughter centriole protein, prevents formation of ectopic microtubule organizing centres
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DOI:
10.1038/embor.2012.40
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发表时间:
2012-06-01
期刊:
影响因子:
7.7
通讯作者:
Dynlacht, Brian D.
Dynlacht, Brian D.
中科院分区:
生物学2区
文献类型:
--
作者:
Li, Ji;Kim, Sehyun;Dynlacht, Brian D.

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在这里,我们发现神经化同源物4 (Neurl4)是一种与CP110相互作用的蛋白质,CP110是一种调节中心体复制的中心体蛋白。Neurl4使用神经化的同源重复序列优先定位于前中心粒和子中心粒。神经14缺失导致异位微管组织中心(MTOCs),导致CP110的积累和一系列中心体蛋白的募集。我们发现这些异位MTOCs通过有丝分裂持续存在,并组装异常的有丝分裂纺锤体。有趣的是,Neurl4促进CP110的泛素化,从而使该蛋白不稳定。我们的研究结果表明,Neurl4抑制CP110的积累,从而维持正常的中心心稳态,防止异位mtoc的形成
Here we identify Neuralized homologue 4 (Neurl4) as a protein that interacts with CP110, a centrosomal protein that regulates centrosome duplication. Neurl4 uses a Neuralized homology repeat to preferentially localize to procentrioles and daughter centrioles. Neurl4 depletion results in ectopic microtubular organizing centres (MTOCs), leading to accumulation of CP110 and recruitment of a cohort of centrosomal proteins. We show that these ectopic MTOCs persist through mitosis and assemble aberrant mitotic spindles. Interestingly, Neurl4 promotes ubiquitylation of CP110, thereby destabilizing this protein. Our results indicate that Neurl4 counter-acts accumulation of CP110, thereby maintaining normal centriolar homeostasis and preventing formation of ectopic MTOCs