Regulation of microtubule dynamics by TOG-domain proteins XMAP215/Dis1 and CLASP.

Regulation of microtubule dynamics by TOG-domain proteins XMAP215/Dis1 and CLASP.
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DOI:
10.1016/j.tcb.2011.06.007
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发表时间:
2011-10
影响因子:
19
通讯作者:
Chang F
Chang F
中科院分区:
生物学1区
文献类型:
--
作者:
Al-Bassam J;Chang F

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微管相关蛋白(MAP)调节微管(MT)动态特性的分子机制仍知之甚少。在这里,我们回顾了对两个保守的 MAP 家族(XMAP215/Dis1 和 CLASP 蛋白家族)理解的最新进展。体内和体外研究表明,XMAP215蛋白在MT+末端充当微管聚合酶,加速MT组装,而CLASP蛋白则促进MT救援并抑制MT灾难事件。这些是结构相关的蛋白质,使用保守的 TOG 结构域将微管蛋白二聚体招募到 MT。我们讨论了这些蛋白质如何使用这些单独的微管蛋白二聚体来调节 MT 加末端的动态行为的模型。
The molecular mechanisms by which microtubule-associated proteins (MAPs) regulate the dynamic properties of microtubules (MTs) are still poorly understood. Here, we review recent advances in our understanding of two conserved families of MAPs, the XMAP215/Dis1 and CLASP family of proteins. In vivo and in vitro studies show that XMAP215 proteins act as microtubule polymerases at MT plus ends to accelerate MT assembly, while CLASP proteins promote MT rescue and suppress MT catastrophe events. These are structurally related proteins that use conserved TOG domains to recruit tubulin dimers to MTs. We discuss models for how these proteins might use these individual tubulin dimers to regulate dynamic behaviors of MT plus ends.
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