Centrin3 in trypanosomes maintains the stability of a flagellar inner-arm dynein for cell motility
Centrin3 in trypanosomes maintains the stability of a flagellar inner-arm dynein for cell motility
复制标题
锥虫中的 Centrin3 维持鞭毛内臂动力蛋白的稳定性以促进细胞运动
DOI:
10.1038/ncomms5060
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发表时间:
2014-06-01
影响因子:
16.6
通讯作者:
Li, Ziyin
中科院分区:
文献类型:
--
作者:
Wei, Ying;Hu, Huiqing;Li, Ziyin
Centrin is a conserved component of centrioles in animals and basal bodies in flagellated organisms. It also associates with axonemal inner-arm dyneins and regulates cell motility, but the underlying mechanism remains elusive. InTrypanosoma brucei, three of the five centrins associate with the flagellar basal body, but no centrin has been found to regulate flagellar motility. Here we show that TbCentrin3 is a flagellar protein and knockdown of TbCentrin3 compromises cell motility. Tandem affinity purification followed by mass spectrometry identifies an inner-arm dynein, TbIAD5-1, as the TbCentrin3 partner, and knockdown of TbIAD5-1 causes similar cell motility defect. Further, we demonstrate the interdependence of TbCentrin3 and TbIAD5-1 for maintaining a stable complex in the flagellar axoneme. Together, these results identify the essential role of TbCentrin3 in cell motility by maintaining the stability of an inner-arm dynein in the flagellum, which may be shared by all the centrin-containing flagellated and ciliated organisms.