A kinetoplastid-specific kinesin is required for cytokinesis and for maintenance of cell morphology in Trypanosoma brucei.
A kinetoplastid-specific kinesin is required for cytokinesis and for maintenance of cell morphology in Trypanosoma brucei.
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细胞因子和维持锥虫锥虫的细胞形态所必需的动力质体特异性驱动蛋白。
DOI:
10.1111/j.1365-2958.2011.07951.x
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发表时间:
2012-02
影响因子:
3.6
通讯作者:
Li Z
中科院分区:
文献类型:
--
作者:
Hu L;Hu H;Li Z
Kinesins are motor-based transport proteins that play diverse roles in various cellular processes. The trypanosome genome lacks the homologs of many conserved mitotic kinesins, but encodes a number of trypanosome-specific kinesins with unknown function. Here, we report the biochemical and functional characterization of TbKIN-C, a trypanosome-specific kinesin, which was initially identified through an RNAi screen for cytokinesis genes in T. brucei. TbKIN-C possesses in vitro ATPase activity and associates with cytoskeletal tubulin microtubules in vivo. It is distributed throughout the cytoskeleton with a focal enrichment at the posterior end of the cell during early cell cycle stages. RNAi of TbKIN-C resulted in distorted cell shape with an elongated posterior filled with tyrosinated tubulin microtubules. Silencing of TbKIN-C impaired the segregation of organelles and cytoskeletal structures and led to detachment of the new flagellum and a small portion of the cytoplasm. We also show that RNAi of TbKIN-C compromised cytokinesis and abolished the trans-localization of TbCPC1, a subunit of the chromosomal passenger complex, from the central spindle to the initiation site of cytokinesis. Our results suggest an essential role of TbKIN-C in maintaining cell morphology, likely through regulating microtubule dynamics at the posterior end of the cell.
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影响因子:
3.7
作者:
Li Z;Lee JH;Chu F;Burlingame AL;Günzl A;Wang CC
通讯作者:
Wang CC
影响因子:
3.6
作者:
Li, Y;Li, ZY;Wang, CC
通讯作者:
Wang, CC
影响因子:
11.4
作者:
Kohl, L;Robinson, D;Bastin, P
通讯作者:
Bastin, P
影响因子:
4.8
作者:
Li, ZY;Zou, CB;Wang, CC
通讯作者:
Wang, CC
影响因子:
4.8
作者:
Dang, Hung Quang;Li, Ziyin
通讯作者:
Li, Ziyin