Sli15(INCENP) dephosphorylation prevents mitotic checkpoint reengagement due to loss of tension at anaphase onset.
Sli15(INCENP) dephosphorylation prevents mitotic checkpoint reengagement due to loss of tension at anaphase onset.
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DOI:
10.1016/j.cub.2010.06.023
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发表时间:
2010-08-10
期刊:
影响因子:
9.2
通讯作者:
Uhlmann, Frank
中科院分区:
文献类型:
--
作者:
Mirchenko, Lesia;Uhlmann, Frank
The mitotic checkpoint, also known as the spindle assembly checkpoint, delays anaphase onset until all chromosomes have reached bipolar tension on the mitotic spindle. Once this is achieved, the protease separase is activated to cleave the chromosomal cohesin complex, thereby triggering anaphase. Cohesin cleavage releases tension between sister chromatids, but why the mitotic checkpoint now remains silent is poorly understood. Here, using budding yeast as a model, we show that loss of sister chromatid cohesion at anaphase onset would engage the mitotic checkpoint if this was not prevented by concomitant separase-dependent activation of the Cdc14 phosphatase. Cdc14, in turn, inactivates the mitotic checkpoint by dephosphorylating Sli15INCENP, a subunit of the conserved Aurora B kinase complex that forms part of the proposed chromosomal tension sensor. Dephosphorylation-dependent relocation of Sli15INCENP from centromeres to the central spindle during anaphase is seen in organisms from yeast to human. Our results suggest that Sli15INCENP dephosphorylation is part of an evolutionarily conserved mechanism that prevents the mitotic checkpoint from reengaging when tension between sister chromatids is lost at anaphase onset. ► Loss of cohesion at anaphase onset can reengage the mitotic checkpoint ► This is prevented by activation of the Cdc14 phosphatase at the same time ► Cdc14 inactivates the mitotic checkpoint by dephosphorylating Sli15INCENP ► A conserved mechanism inactivates the mitotic checkpoint in anaphase
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DOI:
10.1016/j.cub.2009.06.043
发表时间:
2009-07-28
期刊:
Current biology : CB
影响因子:
--
作者:
Pinsky BA;Nelson CR;Biggins S
通讯作者:
Biggins S
影响因子:
56.9
作者:
Palframan, William J.;Meehl, Janet B.;Murray, Andrew W.
通讯作者:
Murray, Andrew W.
影响因子:
64.5
作者:
Stegmeier, F;Visintin, R;Amon, A
通讯作者:
Amon, A
DOI:
10.1016/j.cub.2009.02.056
发表时间:
2009-04-28
期刊:
Current biology : CB
影响因子:
--
作者:
Joglekar AP;Bloom K;Salmon ED
通讯作者:
Salmon ED
DOI:
10.1083/jcb.200208092
发表时间:
2003-04-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Hauf S;Cole RW;LaTerra S;Zimmer C;Schnapp G;Walter R;Heckel A;van Meel J;Rieder CL;Peters JM
通讯作者:
Peters JM