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    Nitrosated glycine derivatives as a potential source of O6-methylguanine in DNA.

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    Authors
    Shuker, D E
    Margison, Geoffrey P
    Affiliation
    MRC Toxicology Unit, Hodgkin Building, University of Leicester, United Kingdom.
    Issue Date
    1997-02-01
    
    Metadata
    Show full item record
    Abstract
    The nitrosated bile acid conjugate N-nitrosoglycocholic acid reacts with DNA to give, rise to several adducts including O6-carboxymethylguanine and, unexpectedly, O6-methylguanine (O6-MG). O6-MG is well established as a toxic and promutagenic lesion and is a substrate for the DNA repair protein O6-alkylguanine-DNA-alkyltransferase. In contrast, O6-carboxymethylguanine is not repaired by this protein. Similar results have been obtained for other nitrosated glycine derivatives, which suggests that O6-MG, which has been observed in DNA from human gastrointestinal tissues, may be derived from intragastric nitrosation of glycine or related compounds.
    Citation
    Nitrosated glycine derivatives as a potential source of O6-methylguanine in DNA. 1997, 57 (3):366-9 Cancer Res.
    Journal
    Cancer Research
    URI
    http://hdl.handle.net/10541/95196
    PubMed ID
    9012456
    Type
    Article
    Language
    en
    ISSN
    0008-5472
    Collections
    All Paterson Institute for Cancer Research

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