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Recombinant plasmid obtained from two different, compatible staphylococcal plasmids.

S Iordănescu

    Journal of Bacteriology
    |November 1, 1975
    PubMed
    Summary
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    Researchers created a new plasmid combining streptomycin and chloramphenicol resistance genes from staphylococcal plasmids. This recombinant plasmid is stably maintained and shows specific incompatibility with its parent plasmids.

    Area of Science:

    • Microbiology
    • Molecular Biology
    • Genetics

    Background:

    • Staphylococcal plasmids confer antibiotic resistance.
    • Understanding plasmid compatibility is crucial for genetic engineering.

    Purpose of the Study:

    • To construct and characterize a recombinant plasmid combining streptomycin and chloramphenicol resistance.
    • To investigate the maintenance and compatibility of the new plasmid.

    Main Methods:

    • Plasmid construction via ligation of resistance genes.
    • Transduction of recombinant plasmid into plasmid-negative strains.
    • Plasmid compatibility testing using marker segregation.

    Main Results:

    • A recombinant plasmid with 100% linked streptomycin and chloramphenicol resistance markers was obtained.

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  • High-frequency transduction (10^-4 CFU/pfu) was achieved.
  • The recombinant plasmid exhibited incompatibility with both parental plasmids, with distinct relationships observed.

    • Conclusions:

    • The recombinant plasmid is stably maintained, likely controlled by the chloramphenicol resistance determinant.
    • Incompatibility patterns provide insights into plasmid replication and maintenance mechanisms in staphylococci.