Spindle rotation in human cells is reliant on a MARK2-mediated equatorial spindle-centering mechanism.
Spindle rotation in human cells is reliant on a MARK2-mediated equatorial spindle-centering mechanism.
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DOI:
10.1083/jcb.201804166
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发表时间:
2018-09-03
期刊:
影响因子:
--
通讯作者:
Draviam VM
中科院分区:
文献类型:
--
作者:
Zulkipli I;Clark J;Hart M;Shrestha RL;Gul P;Dang D;Kasichiwin T;Kujawiak I;Sastry N;Draviam VM
Unlike man-made wheels that are centered and rotated via an axle, the mitotic spindle of a human cell is rotated by external cortical pulling mechanisms. Zulkipli et al. identify MARK2’s role in equatorial spindle centering and astral microtubule length, which in turn control spindle rotation. The plane of cell division is defined by the final position of the mitotic spindle. The spindle is pulled and rotated to the correct position by cortical dynein. However, it is unclear how the spindle’s rotational center is maintained and what the consequences of an equatorially off centered spindle are in human cells. We analyzed spindle movements in 100s of cells exposed to protein depletions or drug treatments and uncovered a novel role for MARK2 in maintaining the spindle at the cell’s geometric center. Following MARK2 depletion, spindles glide along the cell cortex, leading to a failure in identifying the correct division plane. Surprisingly, spindle off centering in MARK2-depleted cells is not caused by excessive pull by dynein. We show that MARK2 modulates mitotic microtubule growth and length and that codepleting mitotic centromere-associated protein (MCAK), a microtubule destabilizer, rescues spindle off centering in MARK2-depleted cells. Thus, we provide the first insight into a spindle-centering mechanism needed for proper spindle rotation and, in turn, the correct division plane in human cells.
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DOI:
10.1083/jcb.201108147
发表时间:
2012-04-16
期刊:
The Journal of cell biology
影响因子:
--
作者:
Domnitz SB;Wagenbach M;Decarreau J;Wordeman L
通讯作者:
Wordeman L
影响因子:
3.3
作者:
Kline-Smith, SL;Khodjakov, A;Walczak, CE
通讯作者:
Walczak, CE
DOI:
10.4161/cc.25671
发表时间:
2013-08-15
期刊:
Cell cycle (Georgetown, Tex.)
影响因子:
--
作者:
Corrigan AM;Shrestha RL;Zulkipli I;Hiroi N;Liu Y;Tamura N;Yang B;Patel J;Funahashi A;Donald A;Draviam VM
通讯作者:
Draviam VM
影响因子:
4.8
作者:
DREWES, G;TRINCZEK, B;MANDELKOW, E
通讯作者:
MANDELKOW, E
影响因子:
11.4
作者:
Draviam, V. M.;Shapiro, I.;Sorger, P. K.
通讯作者:
Sorger, P. K.