The bipolar assembly domain of the mitotic motor kinesin-5.
The bipolar assembly domain of the mitotic motor kinesin-5.
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DOI:
10.1038/ncomms2348
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发表时间:
2013
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
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An outstanding unresolved question is how does the mitotic spindle utilize microtubules and mitotic motors to coordinate accurate chromosome segregation during mitosis? This process depends upon the mitotic motor, kinesin-5, whose unique bipolar architecture, with pairs of motor domains lying at opposite ends of a central rod, allows it to crosslink microtubules within the mitotic spindle and to coordinate their relative sliding during spindle assembly, maintenance and elongation. The structural basis of kinesin-5’s bipolarity is, however, unknown, as protein asymmetry has so far precluded its crystallization. Here we use electron microscopy of single molecules of kinesin-5 and its subfragments, combined with hydrodynamic analysis plus mass spectrometry, circular dichroism and site-directed spin label electron paramagnetic resonance spectroscopy, to show how a staggered antiparallel coiled-coil ‘BASS’ (bipolar assembly) domain directs the assembly of four kinesin-5 polypeptides into bipolar minifilaments. During mitosis, kinesin-5 motors are thought to crosslink microtubules in a muscle-like sliding filament mechanism. By combining electron microscopy with other structural tools, the authors reveal how four kinesin-5 polypeptides are organized into bipolar minifilaments.
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影响因子:
6.1
作者:
McIntosh, J. Richard;Molodtsov, Maxim I.;Ataullakhanov, Fazly I.
通讯作者:
Ataullakhanov, Fazly I.
DOI:
10.1126/science.1204824
发表时间:
2011-08-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Kaan HY;Hackney DD;Kozielski F
通讯作者:
Kozielski F
DOI:
10.1083/jcb.116.4.957
发表时间:
1992-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
de Cuevas M;Tao T;Goldstein LS
通讯作者:
Goldstein LS
影响因子:
64.5
作者:
Ciferri, Claudio;Pasqualato, Sebastiano;Musacchio, Andrea
通讯作者:
Musacchio, Andrea
影响因子:
5.6
作者:
Bodey, Andrew J.;Kikkawa, Masahide;Moores, Carolyn A.
通讯作者:
Moores, Carolyn A.