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• W2150470892 endingPage "10527" @default.
• W2150470892 startingPage "10516" @default.
• W2150470892 abstract "TPX2, a microtubule-associated protein, is required downstream of Ran-GTP to induce spindle assembly. TPX2 activity appears to be tightly regulated during the cell cycle, and we report here one molecular mechanism for this regulation. We found that TPX2 protein levels are cell cycle regulated, peaking in mitosis and declining sharply during mitotic exit. TPX2 is degraded in mitotic extracts, as well as in HeLa cells exiting from mitosis. This instability depends, both in vitro and in vivo, on the anaphase-promoting complex/cyclosome (APC/C), a ubiquitin ligase that controls mitotic progression. In a reconstituted system, TPX2 is efficiently ubiquitinated by APC/C that has been activated by Cdh1. Two discrete elements in TPX2 are required for recognition by APC/C(Cdh1): a KEN box and a novel element in amino acids 1 to 86. Interestingly, the latter element, which has no known APC/C recognition motifs, is required for the ubiquitination of TPX2 by APC/C(Cdh1) in vitro and for its degradation in vivo. We conclude that APC/C(Cdh1) controls the stability of TPX2, thereby ensuring accurate regulation of the spindle assembly in the cell cycle." @default.
• W2150470892 created "2016-06-24" @default.
• W2150470892 creator A5056132664 @default.
• W2150470892 creator A5082529989 @default.
• W2150470892 date "2005-12-01" @default.
• W2150470892 modified "2023-10-16" @default.
• W2150470892 title "Anaphase-Promoting Complex/Cyclosome Controls the Stability of TPX2 during Mitotic Exit" @default.
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• W2150470892 doi "https://doi.org/10.1128/mcb.25.23.10516-10527.2005" @default.
• W2150470892 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1291225" @default.
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• W2150470892 hasPublicationYear "2005" @default.
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