Myosin-10 and actin filaments are essential for mitotic spindle function.

Myosin-10 and actin filaments are essential for mitotic spindle function.
复制标题

DOI:
10.1083/jcb.200804062
复制
发表时间:
2008-07-14
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Bement WM
Bement WM
中科院分区:
其他
文献类型:
--
作者:
Woolner S;O'Brien LL;Wiese C;Bement WM

文献摘要

参考文献

被引文献

相似文献

有丝分裂纺锤体是基于微管的结构,负责细胞分裂过程中的染色体分裂。尽管微管和基于微管的马达在有丝分裂纺锤体中的作用已经确定,但肌动蛋白细丝(F-肌动蛋白)和基于F-肌动蛋白的马达(肌球蛋白)是否是有丝分裂纺锤体的必需成分一直存在争议。基于肌球蛋白-10(Myo10)对减数分裂纺锤体组装的重要性,我们评估了这种非传统的肌球蛋白和F-肌动蛋白在有丝分裂纺锤体中的作用。我们发现Myo10定位于有丝分裂的纺锤体极,并且对于适当的纺锤体锚定、正常的纺锤体长度、纺锤体极的完整性以及通过中期的进展是必不可少的。此外,我们发现F-肌动蛋白定位于有丝分裂纺锤体周围的动态索状物中,并在纺锤体和皮质之间延伸。值得注意的是,尽管正确的锚定依赖于F-肌动蛋白和Myo10,但对Myo10在纺锤体极完整性中的要求是不依赖于F-肌动蛋白的,而F-肌动蛋白和Myo10实际上在维持纺锤体长度方面起着拮抗作用。
Mitotic spindles are microtubule-based structures responsible for chromosome partitioning during cell division. Although the roles of microtubules and microtubule-based motors in mitotic spindles are well established, whether or not actin filaments (F-actin) and F-actin–based motors (myosins) are required components of mitotic spindles has long been controversial. Based on the demonstration that myosin-10 (Myo10) is important for assembly of meiotic spindles, we assessed the role of this unconventional myosin, as well as F-actin, in mitotic spindles. We find that Myo10 localizes to mitotic spindle poles and is essential for proper spindle anchoring, normal spindle length, spindle pole integrity, and progression through metaphase. Furthermore, we show that F-actin localizes to mitotic spindles in dynamic cables that surround the spindle and extend between the spindle and the cortex. Remarkably, although proper anchoring depends on both F-actin and Myo10, the requirement for Myo10 in spindle pole integrity is F-actin independent, whereas F-actin and Myo10 actually play antagonistic roles in maintenance of spindle length.
DOI: 10.1242/dev.011437
发表时间: 2008-01-01
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Liu, Raymond;Woolner, Sarah;Parkhurst, Susan M.
通讯作者: Parkhurst, Susan M.
DOI: 10.1007/s00709-007-0265-8
发表时间: 2007-12-01
期刊: PROTOPLASMA
影响因子: 2.9
作者:
Forer, A.;Spurck, T.;Pickett-Heaps, J. D.
通讯作者: Pickett-Heaps, J. D.
DOI: 10.1083/jcb.94.1.165
发表时间: 1982-01-01
影响因子: 7.8
作者:
KIEHART, DP;MABUCHI, I;INOUE, S
通讯作者: INOUE, S
DOI: 10.1007/s00709-007-0262-y
发表时间: 2007-10-01
期刊: PROTOPLASMA
影响因子: 2.9
作者:
Fabian, Lacramioara;Forer, Arthur
通讯作者: Forer, Arthur
DOI: 10.1016/j.cub.2005.09.054
发表时间: 2005-11-22
期刊: CURRENT BIOLOGY
影响因子: 9.2
作者:
Goshima, G;Wollman, R;Vale, RD
通讯作者: Vale, RD