Spatial organization of cytokinesis signaling reconstituted in a cell-free system.
Spatial organization of cytokinesis signaling reconstituted in a cell-free system.
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DOI:
10.1126/science.1256773
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发表时间:
2014-10-10
期刊:
影响因子:
--
通讯作者:
Mitchison TJ
中科院分区:
文献类型:
--
作者:
Nguyen PA;Groen AC;Loose M;Ishihara K;Wühr M;Field CM;Mitchison TJ
During animal cell division, the cleavage furrow is positioned by microtubules that signal to the actin cortex at the cell midplane. We developed a cell-free system to recapitulate cytokinesis signaling using cytoplasmic extract from Xenopus eggs. Microtubules grew out as asters from artificial centrosomes and met to organize antiparallel overlap zones. These zones blocked interpenetration of neighboring asters and recruited cytokinesis midzone proteins including the Chromosomal Passenger Complex (CPC) and Centralspindlin. The CPC was transported to overlap zones, which required two motor proteins, Kif4A and a Kif20A paralog. Using supported lipid bilayers to mimic the plasma membrane, we observed recruitment of cleavage furrow markers, including a RhoA-GTP reporter, at microtubule overlaps. This system opens further approaches to understanding the biophysics of cytokinesis signaling.
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影响因子:
3.3
作者:
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通讯作者:
Groen AC
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