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    The transcription factor Atf1 binds and activates the APC/C ubiquitin ligase in fission yeast.

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    Authors
    Ors, Aslihan
    Grimaldi, Margaret
    Kimata, Yuu
    Wilkinson, Caroline R M
    Jones, Nic
    Yamano, Hiroyuki
    Affiliation
    Cell Cycle Control Laboratory, Marie Curie Research Institute, The Chart, Oxted, Surrey RH8 0TL, United Kingdom.
    Issue Date
    2009-09-04
    
    Metadata
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    Abstract
    Fission yeast Atf1 is a member of the ATF/CREB basic leucine zipper (bZIP) family of transcription factors with strong homology to mammalian ATF2. Atf1 regulates transcription in response to stress stimuli and also plays a role in controlling heterochromatin formation and recombination. However, its DNA binding independent role is poorly studied. Here, we report that Atf1 has a distinct role in regulating the anaphase-promoting complex/cyclosome (APC/C) ubiquitin ligase. We have identified atf1(+) as a dose-dependent suppressor of apc5-1, a mutation causing mitotic arrest. Remarkably, the suppression is not dependent upon the bZIP domain and is therefore independent of the ability of Atf1 to bind DNA. Interestingly, Atf1 physically binds the APC/C in vivo. Furthermore, we show that addition of purified Atf1 proteins into a cell-free system stimulates ubiquitylation of cyclin B and securin by the APC/C. These results reveal a novel role for Atf1 in cell cycle control through protein-protein interaction.
    Citation
    The transcription factor Atf1 binds and activates the APC/C ubiquitin ligase in fission yeast. 2009, 284 (36):23989-94 J. Biol. Chem.
    Journal
    The Journal of Biological Chemistry
    URI
    http://hdl.handle.net/10541/87561
    DOI
    10.1074/jbc.M109.018309
    PubMed ID
    19584054
    Type
    Article
    Language
    en
    ISSN
    0021-9258
    ae974a485f413a2113503eed53cd6c53
    10.1074/jbc.M109.018309
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research
    Cell Regulation

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