CENP-E combines a slow, processive motor and a flexible coiled coil to produce an essential motile kinetochore tether.
CENP-E combines a slow, processive motor and a flexible coiled coil to produce an essential motile kinetochore tether.
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DOI:
10.1083/jcb.200802189
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发表时间:
2008-05-05
期刊:
影响因子:
--
通讯作者:
Cleveland DW
中科院分区:
文献类型:
--
作者:
Kim Y;Heuser JE;Waterman CM;Cleveland DW
The mitotic kinesin centromere protein E (CENP-E) is an essential kinetochore component that directly contributes to the capture and stabilization of spindle microtubules by kinetochores. Although reduction in CENP-E leads to high rates of whole chromosome missegregation, neither its properties as a microtubule-dependent motor nor how it contributes to the dynamic linkage between kinetochores and microtubules is known. Using single-molecule assays, we demonstrate that CENP-E is a very slow, highly processive motor that maintains microtubule attachment for long periods. Direct visualization of full-length Xenopus laevis CENP-E reveals a highly flexible 230-nm coiled coil separating its kinetochore-binding and motor domains. We also show that full-length CENP-E is a slow plus end–directed motor whose activity is essential for metaphase chromosome alignment. We propose that the highly processive microtubule-dependent motor activity of CENP-E serves to power chromosome congression and provides a flexible, motile tether linking kinetochores to dynamic spindle microtubules.
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影响因子:
64.5
作者:
Abrieu, A;Kahana, JA;Cleveland, DW
通讯作者:
Cleveland, DW
影响因子:
64.5
作者:
Case, RB;Pierce, DW;Vale, RD
通讯作者:
Vale, RD
DOI:
10.1002/jemt.1060130310
发表时间:
1989-11-01
期刊:
JOURNAL OF ELECTRON MICROSCOPY TECHNIQUE
影响因子:
--
作者:
HEUSER, J
通讯作者:
HEUSER, J
影响因子:
4.8
作者:
DeLuca, JG;Newton, CN;Wilson, L
通讯作者:
Wilson, L
影响因子:
64.8
作者:
LOMBILLO, VA;STEWART, RJ;MCINTOSH, JR
通讯作者:
MCINTOSH, JR