A computational model predicts Xenopus meiotic spindle organization.
A computational model predicts Xenopus meiotic spindle organization.
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DOI:
10.1083/jcb.201006076
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发表时间:
2010-12-27
期刊:
影响因子:
--
通讯作者:
Nédélec F
中科院分区:
文献类型:
--
作者:
Loughlin R;Heald R;Nédélec F
Spatially dispersed nucleation and minus end–directed transport of microtubule end disassembly activity can lead to bipolar spindle assembly. The metaphase spindle is a dynamic bipolar structure crucial for proper chromosome segregation, but how microtubules (MTs) are organized within the bipolar architecture remains controversial. To explore MT organization along the pole-to-pole axis, we simulated meiotic spindle assembly in two dimensions using dynamic MTs, a MT cross-linking force, and a kinesin-5–like motor. The bipolar structures that form consist of antiparallel fluxing MTs, but spindle pole formation requires the addition of a NuMA-like minus-end cross-linker and directed transport of MT depolymerization activity toward minus ends. Dynamic instability and minus-end depolymerization generate realistic MT lifetimes and a truncated exponential MT length distribution. Keeping the number of MTs in the simulation constant, we explored the influence of two different MT nucleation pathways on spindle organization. When nucleation occurs throughout the spindle, the simulation quantitatively reproduces features of meiotic spindles assembled in Xenopus egg extracts.
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DOI:
10.1083/jcb.200910125
发表时间:
2010-05-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hentrich C;Surrey T
通讯作者:
Surrey T
影响因子:
9.2
作者:
Goshima, G;Wollman, R;Vale, RD
通讯作者:
Vale, RD
影响因子:
4
作者:
Kisurina-Evgenieva, O;Mack, G;Compton, DA
通讯作者:
Compton, DA
影响因子:
7.8
作者:
Brown, Katherine S.;Blower, Michael D.;Heald, Rebecca
通讯作者:
Heald, Rebecca
DOI:
10.1073/pnas.0902317106
发表时间:
2009-09-08
影响因子:
11.1
作者:
Houghtaling, Benjamin R.;Yang, Ge;Kapoor, Tarun M.
通讯作者:
Kapoor, Tarun M.