Coordinated poleward flux of sister kinetochore fibers drives chromosome alignment

Coordinated poleward flux of sister kinetochore fibers drives chromosome alignment
复制标题

姐妹动粒纤维的协调极向通量驱动染色体排列

DOI:
10.1101/2020.12.30.424837
复制
发表时间:
2021
期刊:
SSRN Electronic Journal
影响因子:
--
通讯作者:
I. Tolic
I. Tolic
中科院分区:
--
文献类型:
--
作者:
Patrik Risteski;Domagoj Božan;Mihaela Jagrić;A. Bosilj;N. Pavin;I. Tolic

文献摘要

参考文献

被引文献

相似文献

纺锤体赤道的染色体排列促进了染色体的正确分离,并取决于施加在着丝点纤维尖端的拉力和极性弹射力。然而,着丝点纤维也受到驱动其向极地流动的力的影响。在这里,我们介绍了一个通量驱动的定心模型,该模型依赖于桥接和着丝点纤维重叠处的力产生的通量。这种定心机制使较长的着丝点纤维比较短的更快地流动,使着丝点向中心移动。我们在人类纺锤体中开发了斑点显微镜,并证实了着丝点纤维通量与长度相关的关键预测。当重叠时间较短且着丝点纤维通量明显慢于桥接纤维通量时,着丝点居中效果较好。我们确定Kif18A和Kif4A是重叠和通量调节因子,NuMA是光纤耦合器。因此,桥接纤维施加到着丝点纤维上的长度依赖的滑动力促进染色体排列。
Chromosome alignment at the spindle equator promotes proper chromosome segregation and depends on pulling forces exerted at kinetochore fiber tips together with polar ejection forces. However, kinetochore fibers are also subjected to forces driving their poleward flux. Here we introduce a flux-driven centering model that relies on flux generated by forces within the overlaps of bridging and kinetochore fibers. This centering mechanism works so that the longer kinetochore fiber fluxes faster than the shorter one, moving the kinetochores towards the center. We developed speckle microscopy in human spindles and confirmed the key prediction that kinetochore fiber flux is length-dependent. Kinetochores are better centered when overlaps are shorter and the kinetochore fiber flux markedly slower than the bridging fiber flux. We identify Kif18A and Kif4A as overlap and flux regulators and NuMA as a fiber coupler. Thus, length-dependent sliding forces exerted by the bridging fiber onto kinetochore fibers promote chromosome alignment.
中期运动学运动受动力蛋白-8电动机和微管动态不稳定性调节。
DOI: 10.1091/mbc.e17-11-0667
发表时间: 2018-06-01
影响因子: 3.3
作者:
Klemm AH;Bosilj A;Gluncˇic M;Pavin N;Tolic IM
通讯作者: Tolic IM
DOI: 10.1016/j.devcel.2017.09.010
发表时间: 2017-10-09
期刊: Developmental cell
影响因子: 11.8
作者:
Vukušić K;Buđa R;Bosilj A;Milas A;Pavin N;Tolić IM
通讯作者: Tolić IM
DOI: --
发表时间: 2002-03
影响因子: 4
作者:
R. West;T. Malmstrom;J. McIntosh
通讯作者: R. West;T. Malmstrom;J. McIntosh
KIF18A和染色体通过微管生长抑制和动力学张力的空间控制来限制着丝粒运动。
DOI: 10.1016/j.devcel.2012.02.013
发表时间: 2012-05-15
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Stumpff, Jason;Wagenbach, Michael;Franck, Andrew;Asbury, Charles L.;Wordeman, Linda
通讯作者: Wordeman, Linda
DOI: 10.1091/mbc.e08-10-1033
发表时间: 2009-03-15
影响因子: 3.3
作者:
Brust-Mascher, Ingrid;Sommi, Patrizia;Scholey, Jonathan M.
通讯作者: Scholey, Jonathan M.