Spindle microtubules generate tension-dependent changes in the distribution of inner kinetochore proteins.

Spindle microtubules generate tension-dependent changes in the distribution of inner kinetochore proteins.
复制标题

DOI:
10.1083/jcb.201012050
复制
发表时间:
2011-04-04
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Fukagawa T
Fukagawa T
中科院分区:
其他
文献类型:
--
作者:
Suzuki A;Hori T;Nishino T;Usukura J;Miyagi A;Morikawa K;Fukagawa T

文献摘要

参考文献

被引文献

相似文献

CENP-T的N和C末端经历张力依赖性分离,这表明CENP-T的伸长负责内部动粒形状的变化。动粒与来自有丝分裂纺锤体的微管形成动态界面。活细胞光显微镜为基础的动态结构变化的动粒内的观察表明,在微管相互作用的动粒内发生分子重排。然而,这些重新安排的来源仍然不清楚。在本文中,我们分析了脊椎动物动粒超微结构的免疫电子显微镜(EM)在存在或不存在张力的纺锤体微管。我们发现,由CENP-A,CENP-C,CENP-R和CENP-T的C-末端结构域定义的内部动粒区域在张力存在下变形,而由Ndc 80,Mis 12和CENP-E定义的外部动粒区域即使在张力下也不拉伸。重要的是,基于EM,荧光显微镜和体外分析,我们证明了CENP-T的N和C末端经历张力依赖性分离,表明CENP-T的伸长至少部分地负责内部动粒形状的变化。
The N and C termini of CENP-T undergo tension-dependent separation, suggesting that CENP-T elongation is responsible for changes in the shape of the inner kinetochore. The kinetochore forms a dynamic interface with microtubules from the mitotic spindle. Live-cell light microscopy–based observations on the dynamic structural changes within the kinetochore suggest that molecular rearrangements within the kinetochore occur upon microtubule interaction. However, the source of these rearrangements is still unclear. In this paper, we analyze vertebrate kinetochore ultrastructure by immunoelectron microscopy (EM) in the presence or absence of tension from spindle microtubules. We found that the inner kinetochore region defined by CENP-A, CENP-C, CENP-R, and the C-terminal domain of CENP-T is deformed in the presence of tension, whereas the outer kinetochore region defined by Ndc80, Mis12, and CENP-E is not stretched even under tension. Importantly, based on EM, fluorescence microscopy, and in vitro analyses, we demonstrated that the N and C termini of CENP-T undergo a tension-dependent separation, suggesting that CENP-T elongation is at least partly responsible for changes in the shape of the inner kinetochore.
动力学 - 微管附着依赖于Hec1的无序N末端尾部结构域。
DOI: 10.1016/j.cub.2008.08.012
发表时间: 2008-11-25
期刊: Current biology : CB
影响因子: --
作者:
Guimaraes GJ;Dong Y;McEwen BF;Deluca JG
通讯作者: Deluca JG
DOI: 10.1083/jcb.200912022
发表时间: 2010-06-14
期刊: The Journal of cell biology
影响因子: --
作者:
Johnston K;Joglekar A;Hori T;Suzuki A;Fukagawa T;Salmon ED
通讯作者: Salmon ED
DOI: 10.1073/pnas.211400898
发表时间: 2001-10-23
影响因子: 11.1
作者:
Ando, T;Kodera, N;Toda, A
通讯作者: Toda, A
DOI: 10.1002/cphc.200800210
发表时间: 2008-09-15
期刊: CHEMPHYSCHEM
影响因子: 2.9
作者:
Miyagi, Atsushi;Tsunaka, Yasuo;Ando, Toshio
通讯作者: Ando, Toshio
DOI: 10.1093/emboj/20.16.4603
发表时间: 2001-08-15
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Fukagawa, T;Mikami, Y;Ikemura, T
通讯作者: Ikemura, T