BubR1 N terminus acts as a soluble inhibitor of cyclin B degradation by APC/C(Cdc20) in interphase.
BubR1 N terminus acts as a soluble inhibitor of cyclin B degradation by APC/C(Cdc20) in interphase.
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DOI:
10.1016/j.devcel.2008.11.004
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发表时间:
2009-01
影响因子:
11.8
通讯作者:
van Deursen, Jan M.
中科院分区:
文献类型:
--
作者:
Malureanu, Liviu A.;Jeganathan, Karthik B.;Hamada, Masakazu;Wasilewski, Lisa;Davenport, James;van Deursen, Jan M.
BubR1 is an essential mitotic checkpoint protein with multiple functional domains. It has been implicated in mitotic checkpoint control -as an active kinase at unattached kinetochores and as a cytosolic inhibitor of APC/CCdc20 activity- as well as in mitotic timing and stable chromosome-spindle attachment. Using BubR1-conditional knockout cells and BubR1 domain mutants, we demonstrate that the N-terminal Cdc20 binding domain of BubR1 is essential for all of these functions, whereas its C-terminal Cdc20-binding domain, Bub3-binding domain, and kinase domain are not. We find that the BubR1 N terminus binds to Cdc20 in a KEN box-dependent manner to inhibit APC/C activity in interphase, thereby allowing accumulation of cyclin B in G2 phase prior to mitosis onset. Together, our results suggest that kinetochore-bound BubR1 is non-essential and that soluble BubR1 functions as a pseudosubstrate inhibitor of APC/CCdc20 during interphase to prevent unscheduled degradation of specific APC/C substrates.
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DOI:
10.1083/jcb.200706015
发表时间:
2007-10-22
期刊:
The Journal of cell biology
影响因子:
--
作者:
Jeganathan K;Malureanu L;Baker DJ;Abraham SC;van Deursen JM
通讯作者:
van Deursen JM
影响因子:
5.3
作者:
Millband, DN;Hardwick, KG
通讯作者:
Hardwick, KG
影响因子:
3.7
作者:
Harris, L;Davenport, J;Goorha, R
通讯作者:
Goorha, R
DOI:
10.1073/pnas.0401142101
发表时间:
2004-06-08
影响因子:
11.1
作者:
Kops, GJPL;Foltz, DR;Cleveland, DW
通讯作者:
Cleveland, DW
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