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    Biochem J. 1991 Mar 1;274 ( Pt 2):587-93.

    Structure of human glutathione S-transferase class Mu genes.

    Taylor JB, Oliver J, Sherrington R, Pemble SE.

    Source

    Cancer Research Campaign Molecular Toxicology Group, University College and Middlesex Hospital Medical School, London, U.K.

    Abstract

    Nucleotide sequencing of a human cosmid clone shows that the exon-intron structures of a glutathione S-transferase multigene family are conserved between man and rat, that the human gene family is clustered and that gene conversion events have occurred within the cluster. In addition, between man and rat, there is a high degree of nucleotide sequence identity not only in exons but also in some introns. These conserved sequences are coincident with homologous sequences subject to gene conversion in both species, and hence the utilization of gene conversion by this gene family has itself been conserved. By using transient-expression assay the conserved/converted regions are shown to be capable of modulating transcriptional activity. The data suggest that DNA repair by gene conversion may be a chemical immunity mechanism. which could result in acquired resistance to toxins and, in particular, drug resistance due to glutathione S-transferase in tumours.

    PMID:
    2006920
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC1150179
    Free PMC Article

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