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    Cell. 1995 Apr 21;81(2):269-78.

    Genes involved in sister chromatid separation are needed for B-type cyclin proteolysis in budding yeast.

    Source

    Research Institute of Molecular Pathology, Vienna, Austria.

    Erratum in

    • Cell 1998 May 1;93(3):487.

    Abstract

    B-type cyclin destruction is necessary for exit from mitosis and the initiation of a new cell cycle. Through the isolation of mutants, we have identified three essential yeast genes, CDC16, CDC23, and CSE1, which are required for proteolysis of the B-type cyclin CLB2 but not of other unstable proteins. cdc23-1 mutants are defective in both entering and exiting anaphase. Their failure to exit anaphase can be explained by defective cyclin proteolysis. CDC23 is required at the metaphase/anaphase transition to separate sister chromatids, and we speculate that it might promote proteolysis of proteins that hold sister chromatids together. Proteolysis of CLB2 is initiated in early anaphase, but a fraction of CLB2 remains stable until anaphase is complete.

    PMID:
    7736579
    [PubMed - indexed for MEDLINE]

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