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    Nat Struct Mol Biol. 2010 Oct;17(10):1263-5. Epub 2010 Aug 22.

    The breast cancer tumor suppressor BRCA2 promotes the specific targeting of RAD51 to single-stranded DNA.

    Thorslund T, McIlwraith MJ, Compton SA, Lekomtsev S, Petronczki M, Griffith JD, West SC.

    Source

    London Research Institute, Cancer Research UK, Clare Hall Laboratories, South Mimms, Hertfordshire, UK.

    Abstract

    Individuals with BRCA2 mutations are predisposed to breast cancers owing to genome instability. To determine the functions of BRCA2, the human protein was purified. It was found to bind selectively to single-stranded DNA (ssDNA), and to ssDNA in tailed duplexes and replication fork structures. Monomeric and dimeric forms of BRCA2 were observed by EM. BRCA2 directed the binding of RAD51 recombinase to ssDNA, reduced the binding of RAD51 to duplex DNA and stimulated RAD51-mediated DNA strand exchange. These observations provide a molecular basis for the role of BRCA2 in the maintenance of genome stability.

    PMID:
    20729858
    [PubMed - indexed for MEDLINE]

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      • Chemical compound molecule image DNA
        MW: 523.36 g/mol
        MF: C15H31N3O13P2

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