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    Oncogene. 2000 Jun 1;19(24):2812-9.

    Degradation of human Aurora2 protein kinase by the anaphase-promoting complex-ubiquitin-proteasome pathway.

    Honda K, Mihara H, Kato Y, Yamaguchi A, Tanaka H, Yasuda H, Furukawa K, Urano T.

    Source

    Department of Biochemistry II, Nagoya University School of Medicine, 65 Tsurumai-machi, Showa-ku, Nagoya 466-0065, Japan.

    Abstract

    Human Aurora2 was originally identified by its close homology to yeast IPL1 and fly aurora, which are key regulators of chromosome segregation and a family of serine/threonine kinases. Here we demonstrate that the Aurora2 protein is degraded rapidly after G2/M phase release in mammalian cells. Aurora2 protein has a rapid turnover rate with a half-life of approximately 2 h. In eukaryotic cells, the ubiquitin-proteasome pathway is the major mechanism for the targeted degradation of unstable proteins. The treatment of mammalian cells with proteasome inhibitors blocks Aurora2 degradation. Furthermore, Aurora2 is polyubiquitinated in vivo and in vitro using anaphase-promoting complex (APC). These results demonstrate that Aurora2 protein is turned over through the APC-ubiquitin-proteasome pathway. Oncogene (2000) 19, 2812 - 2819

    PMID:
    10851084
    [PubMed - indexed for MEDLINE]
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