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[Bacteriocin-like factor in Bacillus thuringiensis].

E M Netyksa, T A Smirnova, I B Minenkova

    Mikrobiologiia
    |July 1, 1979
    PubMed
    Summary

    Bacillus thuringiensis var. galleriae strains produce factor K, a bacteriocin-like substance that inhibits other Bacillus thuringiensis serotypes. This factor shows specificity and potential for transfer between strains.

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    Area of Science:

    • Microbiology
    • Bacteriology
    • Molecular Biology

    Context:

    • Investigating inter-strain interactions within Bacillus thuringiensis.
    • Characterizing novel antimicrobial compounds produced by bacteria.
    • Exploring bacteriocin-like factors in microbial ecosystems.

    Purpose:

    • To describe Bacillus thuringiensis var. galleriae strains and their bacteriocin-like factor (factor K).
    • To determine the inhibitory spectrum and optimal production time of factor K.
    • To assess the potential for factor K transfer between bacterial strains.

    Summary:

    • Bacillus thuringiensis var. galleriae strains produce a bacteriocin-like factor, termed factor K, which specifically inhibits various Bacillus thuringiensis serotypes.
    • Factor K production peaks at 8-9 hours of cultivation and does not affect other Gram-positive or Gram-negative bacteria.
    • No correlation was found between the structural elements of K+ cultures and their antibacterial activity, but factor K appears transferable.

    Impact:

    • Provides insights into the diversity of antimicrobial agents within Bacillus thuringiensis.
    • Highlights the potential of factor K as a specific biocontrol agent against certain Bacillus thuringiensis strains.
    • Suggests avenues for further research into bacteriocin mechanisms and horizontal gene transfer.

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