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Proteus mirabilis phage 5006M: a physical characterization.

G H Pretorius, W F Coetzee

    The Journal of General Virology
    |November 1, 1979
    PubMed
    Summary
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    This study characterizes Proteus mirabilis phage 5006M, detailing its physical properties and DNA structure. Findings suggest a sequential headful packaging mechanism for phage 5006M DNA.

    Area of Science:

    • Microbiology
    • Molecular Biology
    • Virology

    Background:

    • Proteus mirabilis phage 5006M is a generalized transducing phage.
    • Understanding phage physical characteristics is crucial for molecular biology and virology.

    Purpose of the Study:

    • To conduct a comprehensive physical characterization of the Proteus mirabilis phage 5006M.
    • To elucidate the structural and genomic properties of phage 5006M DNA.

    Main Methods:

    • Morphological analysis of the phage.
    • Determination of buoyant density and G + C content of phage DNA.
    • Measurement of phage genome length and molecular weight.
    • Denaturation mapping and homoduplex analysis for DNA structure determination.

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    Main Results:

    • Phage 5006M exhibits specific morphology with a buoyant density of 1.491 g/ml.
    • The phage DNA has a G + C content of 44%, a length of 14.8 micrometers, and a molecular weight of 30.7 x 10(6).
    • Denaturation mapping revealed circularly permuted phage DNA with 3.6% terminal redundancy, indicating concatemeric precursors.

    Conclusions:

    • The physical and genomic characteristics of Proteus mirabilis phage 5006M have been elucidated.
    • Results support a sequential headful packaging mechanism for phage 5006M DNA.
    • This characterization provides foundational data for further research in phage biology and genetics.