Bub1 regulates chromosome segregation in a kinetochore-independent manner.
Bub1 regulates chromosome segregation in a kinetochore-independent manner.
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DOI:
10.1083/jcb.200902128
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发表时间:
2009-06-01
期刊:
影响因子:
--
通讯作者:
Meraldi P
中科院分区:
文献类型:
--
作者:
Klebig C;Korinth D;Meraldi P
The kinetochore-bound protein kinase Bub1 performs two crucial functions during mitosis: it is essential for spindle checkpoint signaling and for correct chromosome alignment. Interestingly, Bub1 mutations are found in cancer tissues and cancer cell lines. Using an isogenic RNA interference complementation system in transformed HeLa cells and untransformed RPE1 cells, we investigate the effect of structural Bub1 mutants on chromosome segregation. We demonstrate that Bub1 regulates mitosis through the same mechanisms in both cell lines, suggesting a common regulatory network. Surprisingly, Bub1 can regulate chromosome segregation in a kinetochore-independent manner, albeit at lower efficiency. Its kinase activity is crucial for chromosome alignment but plays only a minor role in spindle checkpoint signaling. We also identify a novel conserved motif within Bub1 (amino acids 458–476) that is essential for spindle checkpoint signaling but does not regulate chromosome alignment, and we show that several cancer-related Bub1 mutants impair chromosome segregation, suggesting a possible link to tumorigenesis.
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影响因子:
11.8
作者:
Malureanu, Liviu A.;Jeganathan, Karthik B.;Hamada, Masakazu;Wasilewski, Lisa;Davenport, James;van Deursen, Jan M.
通讯作者:
van Deursen, Jan M.
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:
64.8
作者:
Cahill, DP;Lengauer, C;Vogelstein, B
通讯作者:
Vogelstein, B
DOI:
10.1083/jcb.143.7.1775
发表时间:
1998-12-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bernard P;Hardwick K;Javerzat JP
通讯作者:
Javerzat JP
影响因子:
4.5
作者:
Fernius J;Hardwick KG
通讯作者:
Hardwick KG