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    Id helix-loop-helix proteins inhibit nucleoprotein complex formation by the TCF ETS-domain transcription factors.

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    Authors
    Yates, Paula R
    Atherton, Graham T
    Deed, Richard W
    Norton, John D
    Sharrocks, Andrew D
    Affiliation
    Department of Biochemistry and Genetics, The Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne, NE2 4HH.
    Issue Date
    1999-02-15
    
    Metadata
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    Abstract
    The Id subfamily of helix-loop-helix (HLH) proteins plays a fundamental role in the regulation of cellular proliferation and differentiation. Id proteins are thought to inhibit differentiation mainly through interaction with other HLH proteins and by blocking their DNA-binding activity. Members of the ternary complex factor (TCF) subfamily of ETS-domain proteins have key functions in regulating immediate-early gene expression in response to mitogenic stimulation. TCFs form DNA-bound complexes with the serum response factor (SRF) and are direct targets of MAP kinase (MAPK) signal transduction cascades. In this study we demonstrate functional interactions between Id proteins and TCFs. Ids bind to the ETS DNA-binding domain and disrupt the formation of DNA-bound complexes between TCFs and SRF on the c-fos serum response element (SRE). Inhibition occurs by disrupting protein-DNA interactions with the TCF component of this complex. In vivo, the Id proteins cause down-regulation of the transcriptional activity mediated by the TCFs and thereby block MAPK signalling to SREs. Therefore, our results demonstrate a novel facet of Id function in the coordination of mitogenic signalling and cell cycle entry.
    Citation
    Id helix-loop-helix proteins inhibit nucleoprotein complex formation by the TCF ETS-domain transcription factors. 1999, 18 (4):968-76 EMBO J.
    Journal
    EMBO Journal
    URI
    http://hdl.handle.net/10541/90791
    DOI
    10.1093/emboj/18.4.968
    PubMed ID
    10022839
    Type
    Article
    Language
    en
    ISSN
    0261-4189
    ae974a485f413a2113503eed53cd6c53
    10.1093/emboj/18.4.968
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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