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Bacteriophage-typable revertants from pleiotropic staphylococcal mutants.

R Z Korman

    Journal of Bacteriology
    |November 1, 1975
    PubMed
    Summary

    Researchers analyzed Staphylococcus aureus cell walls, identifying novel amino sugars like galactosamine and altered serine levels in revertant strains. This study confirms these revertants are mutants of the original NCTC 8511 strain.

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    Area of Science:

    • Microbiology
    • Biochemistry
    • Molecular Biology

    Background:

    • Staphylococcus aureus is a significant human pathogen.
    • Cell wall composition is crucial for bacterial structure and function.
    • Previous studies identified pleiotropic strains with modified cell walls.

    Purpose of the Study:

    • To characterize the cell wall composition of revertant strains of Staphylococcus aureus.
    • To identify novel components or alterations in the cell wall.
    • To confirm the mutational origin of pleiotropic strains.

    Main Methods:

    • Physical purification of cell walls from bacteriophage-typable revertants.
    • Quantitative analysis of amino acid, amino sugar, and phosphorus content.
    • Bacteriophage typing for strain characterization.

    Main Results:

    • Cell walls from revertant strains showed variations in amino acid and amino sugar content.
    • Elevated serine levels were observed in some revertants.
    • A novel amino sugar, galactosamine, was identified in one revertant strain.
    • Revertants shared similar bacteriophage typing patterns with the parental strain.

    Conclusions:

    • The identified cell wall alterations in revertants provide insights into Staphylococcus aureus cell wall biosynthesis.
    • The discovery of galactosamine in Staphylococcus aureus cell walls is a novel finding.
    • Bacteriophage typing supports the conclusion that the pleiotropic strains are indeed mutants of Staphylococcus aureus NCTC 8511.

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