Mps1 kinase activity restrains anaphase during an unperturbed mitosis and targets Mad2 to kinetochores.
Mps1 kinase activity restrains anaphase during an unperturbed mitosis and targets Mad2 to kinetochores.
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DOI:
10.1083/jcb.200712028
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发表时间:
2008-06-16
期刊:
影响因子:
--
通讯作者:
Taylor S
中科院分区:
文献类型:
--
作者:
Tighe A;Staples O;Taylor S
Mps1 is an upstream component of the spindle assembly checkpoint, which, in human cells, is required for checkpoint activation in response to spindle damage but not apparently during an unperturbed mitosis. Mps1 also recruits Mad1 and Mad2 to kinetochores. However, whether the enzymatic activity of Mps1 is required for these processes is unclear. To address this question, we established an RNA interference (RNAi) complementation assay. Repression of Mps1 triggers premature anaphase, often with unaligned or maloriented chromosomes. This phenotype is rescued by an RNAi-resistant wild-type Mps1 transgene but not by a catalytically inactive mutant. An analogue-sensitive allele, Mps1M602A, also rescues the RNAi-induced defect, but not when inhibited by the adenosine triphosphate analogue 1-NM-PP1. Thus, Mps1 activity does restrain anaphase during an unperturbed mitosis. Furthermore, although catalytically inactive Mps1 can restore kinetochore localization of Mad1, only the active kinase restores Mad2 localization. Thus, in human cells, Mps1 catalytic activity is required for spindle checkpoint function and recruitment of Mad2.
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影响因子:
3.3
作者:
Liu, ST;Chan, GKT;Yen, TJ
通讯作者:
Yen, TJ
影响因子:
7.8
作者:
Hagting, Anja;Den Elzen, Nicole;Vodermaier, Hartmut C;Waizenegger, Irene C;Peters, Jan-Michael;Pines, Jonathon
通讯作者:
Pines, Jonathon
影响因子:
7.8
作者:
RIEDER, CL;SCHULTZ, A;SLUDER, G
通讯作者:
SLUDER, G
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4
作者:
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通讯作者:
Taylor, SS
DOI:
10.1083/jcb.130.4.929
发表时间:
1995-08
期刊:
The Journal of cell biology
影响因子:
--
作者:
Nicklas RB;Ward SC;Gorbsky GJ
通讯作者:
Gorbsky GJ