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Related Experiment Videos

[Interplasmid illegitimate recombination in Bacillus subtilis cells].

V I Bashkirov, M M Stoilova-Disheva, A A Prozorov

    Molekuliarnaia Genetika, Mikrobiologiia I Virusologiia
    |November 1, 1988
    PubMed
    Summary

    Illegitimate recombination in Bacillus subtilis involved plasmids pE194 and pBD17. Most recombinants formed via short homologous regions, with one nonhomologous event observed, offering insights into plasmid DNA repair mechanisms.

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    Area of Science:

    • Molecular Biology
    • Microbiology
    • Genetics

    Context:

    • Investigating illegitimate recombination mechanisms between bacterial plasmids.
    • Utilizing Bacillus subtilis as a model organism for genetic studies.
    • Analyzing plasmid interactions involving Staphylococcus aureus and Escherichia coli derived plasmids.

    Purpose:

    • To characterize the outcomes and mechanisms of illegitimate recombination between specific plasmids in Bacillus subtilis.
    • To identify the types and frequencies of recombinant plasmids generated.
    • To compare recombination sites with previously studied chromosomal integration events.

    Summary:

    • Studied illegitimate recombination between Staphylococcus aureus plasmids (pE194, pGG20) and a modified pUB110 plasmid (pBD17) in Bacillus subtilis.

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  • Generated plasmid cointegrates at a frequency of 1-3 x 10^-8, yielding 9 distinct recombinant types from 22 analyzed hybrids.
  • Recombination primarily occurred at short homologous regions (9-15 bp) in 8 cases, with one instance of nonhomologous recombination.
  • Demonstrated sequence similarity at recombination sites between cointegrates and previously identified pE194 chromosomal integration sites.

    • Impact:

    • Provides detailed molecular insights into illegitimate recombination pathways in bacteria.
    • Identifies specific homologous sequences involved in plasmid recombination.
    • Contributes to understanding plasmid stability, evolution, and genetic exchange in microbial communities.
    • Informs strategies for genetic engineering and manipulation of bacterial plasmids.