Mechanisms underlying the dual-mode regulation of microtubule dynamics by Kip3/kinesin-8.

Mechanisms underlying the dual-mode regulation of microtubule dynamics by Kip3/kinesin-8.
复制标题

DOI:
10.1016/j.molcel.2011.06.027
复制
发表时间:
2011-09-02
期刊:
影响因子:
16
通讯作者:
Pellman D
Pellman D
中科院分区:
生物学1区
文献类型:
--
作者:
Su X;Qiu W;Gupta ML Jr;Pereira-Leal JB;Reck-Peterson SL;Pellman D

文献摘要

参考文献

被引文献

相似文献

微管马达的激酶-8家族在细胞微管长度控制中起着关键作用。这些马达对微管动力学有复杂的影响:它们使生长的微管不稳定,却使收缩的微管稳定。出芽酵母的动力蛋白-8 (Kip3)聚集在生长的微管的正端,而不是收缩的微管。在这里,我们确定了Kip3尾部结构域在介导其不稳定和稳定活动中的重要作用。Kip3尾部促进了Kip在正端的积累,促进了Kip3的不稳定作用。然而,Kip3尾部也抑制微管收缩,是促进Kip3拯救微管所必需的。尾结构域的这些作用可能是由我们所描述的微管蛋白和微管结合活动介导的。我们提出了一个浓度依赖模型来协调Kip3的不稳定和稳定活动,并讨论了它与细胞微管组织的相关性。
The kinesin-8 family of microtubule motors plays a critical role in microtubule length control in cells. These motors have complex effects on microtubule dynamics: they destabilize growing microtubules yet stabilize shrinking microtubules. The budding yeast kinesin-8, Kip3, accumulates on plus ends of growing but not shrinking microtubules. Here we identify an essential role of the tail domain of Kip3 in mediating both its destabilizing and stabilizing activities. The Kip3-tail promotes Kip’s accumulation at the plus ends and facilitates the destabilizing effect of Kip3. However, the Kip3-tail also inhibits microtubule shrinkage and is required for promoting microtubule rescue by Kip3. These effects of the tail domain are likely to be mediated by the tubulin- and microtubule-binding activities that we describe. We propose a concentration-dependent model for the coordination of the destabilizing and stabilizing activities of Kip3 and discuss its relevance to cellular microtubule organization.
DOI: 10.1016/j.cell.2009.07.032
发表时间: 2009-09-18
期刊: CELL
影响因子: 64.5
作者:
Varga, Vladimir;Leduc, Cecile;Howard, Jonathon
通讯作者: Howard, Jonathon
DOI: 10.1038/ncb1457
发表时间: 2006-09-01
影响因子: 21.3
作者:
Gupta, Mohan L., Jr.;Carvalho, Pedro;Pellman, David
通讯作者: Pellman, David
DOI: 10.1016/0378-1119(89)90403-4
发表时间: 1989-11-15
期刊: GENE
影响因子: 3.5
作者:
HOVLAND, P;FLICK, J;SCLAFANI, RA
通讯作者: SCLAFANI, RA
DOI: 10.1159/000092963
发表时间: 2006-01-01
期刊: INFECTION AND INFLAMMATION : IMPACTS ON ONCOGENESIS
影响因子: --
作者:
Duesberg, Peter;Li, Ruhong;Hehlmann, Ruediger
通讯作者: Hehlmann, Ruediger
DOI: 10.1083/jcb.143.3.687
发表时间: 1998-11-02
期刊: The Journal of cell biology
影响因子: --
作者:
Straight AF;Sedat JW;Murray AW
通讯作者: Murray AW