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A Simple, Rapid, and Quantitative Assay to Measure Repair of DNA-protein Crosslinks on Plasmids Transfected into Mammalian Cells
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A Simple, Rapid, and Quantitative Assay to Measure Repair of DNA-protein Crosslinks on Plasmids Transfected into Mammalian Cells

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The pR plasmid: a tool for studying DNA repair and mutagenesis in prokaryotic and eukaryotic cells

P A Battaglia, S Perri, F Gigliani

    Annali Dell'Istituto Superiore Di Sanita
    |January 1, 1989
    PubMed

    Insights

    The pR plasmid

    Area of Science:

    • Molecular Biology
    • Genetics
    • DNA Repair Mechanisms

    Background:

    • The R46 plasmid derivative, pR, is investigated for its role in UV repair and mutagenesis.
    • Understanding DNA repair pathways is crucial for cellular health and disease prevention.

    Purpose of the Study:

    • To elucidate the functional requirements and regulatory mechanisms of the pR plasmid's mucAB genes in UV repair.
    • To assess the impact of pR-mediated mucAB gene expression on UV resistance in mammalian cells.

    Main Methods:

    • Experimental analysis using the pR plasmid system.
    • Investigating gene cooperation and regulatory pathways involving mucAB, uvpl, and lexA.
    • Transformation of mammalian cells with pR plasmid carrying mucAB genes.

    Main Results:

    • The pR plasmid's mucAB genes require the uvpl gene product for UV repair.
    • MucAB gene expression is regulated by both the lexA gene and a novel antirepressor gene within the pR plasmid's rep region.
    • Mammalian cells harboring the pR plasmid with mucAB genes exhibit increased resistance to UV radiation.

    Conclusions:

    • The pR plasmid provides a model for studying UV repair and mutagenesis.
    • UV repair by mucAB genes involves complex regulatory interactions.
    • The mucAB genes confer UV resistance to mammalian cells, suggesting potential therapeutic applications.

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