Drosophila katanin is a microtubule depolymerase that regulates cortical-microtubule plus-end interactions and cell migration.

Drosophila katanin is a microtubule depolymerase that regulates cortical-microtubule plus-end interactions and cell migration.
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DOI:
10.1038/ncb2206
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发表时间:
2011-04
影响因子:
21.3
通讯作者:
Sharp DJ
Sharp DJ
中科院分区:
生物学1区
文献类型:
--
作者:
Zhang D;Grode KD;Stewman SF;Diaz-Valencia JD;Liebling E;Rath U;Riera T;Currie JD;Buster DW;Asenjo AB;Sosa HJ;Ross JL;Ma A;Rogers SL;Sharp DJ

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细胞皮质微管动力学的调节对细胞的运动、形态发生和分裂具有重要意义。在这里,我们展示了果蝇katanin,DM-Kat60,功能是在间期细胞中产生一个动态的皮质-微管界面。在S2细胞中,DM-Kat60集中在间期细胞皮质,在那里它抑制微管加端的聚合,从而防止形成异常致密的皮质阵列。DM-Kat60也定位于前沿的游走性D17细胞,并对其运动的多个参数进行负面调节。最后,在体外,DM-Kat60从它们的末端切断并解聚MTS。基于这些数据,我们认为DM-Kat60从接触特定皮质部位的微管末端或晶格中移除微管蛋白,以防止稳定和/或侧向附着。这种活性的不对称分布可能有助于在参与细胞迁移的MT行为中产生地区性差异。
Regulation of microtubule dynamics at the cell cortex is important for cell motility, morphogenesis and division. Here we show that the Drosophila Katanin, Dm-Kat60, functions to generate a dynamic cortical-microtubule interface in interphase cells. In S2 cells, Dm-Kat60 concentrates at the interphase cell cortex where it suppresses the polymerization of microtubule plus-ends thereby preventing the formation of aberrantly dense cortical arrays. Dm-Kat60 also localizes to the leading edge migratory D17 cells and negatively regulates multiple parameters of their motility. Finally, in vitro, Dm-Kat60 severs and depolymerizes MTs from their ends. Based on these data, we propose that Dm-Kat60 removes tubulin from microtubule ends or lattice that contact specific cortical sites to preventing stable and/or lateral attachments. The asymmetric distribution of such an activity could help generate regional variations in MT behaviors involved in cell migration.
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