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Minicell formation by Campylobacter jejuni.

F M Brock, R G Murray

    Canadian Journal of Microbiology
    |May 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Campylobacter jejuni forms tiny minicells by shedding flagella and cell poles. These minicells lack nucleoplasm but retain essential outer structures, representing a novel bacterial division process.

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    Area of Science:

    • Microbiology
    • Cell Biology
    • Bacterial Morphology

    Background:

    • Campylobacter jejuni is a significant human pathogen.
    • Bacterial cell division and morphology are crucial for understanding pathogenesis.
    • The formation of minicells in C. jejuni has not been previously characterized.

    Purpose of the Study:

    • To investigate the formation and structure of minicells in Campylobacter jejuni.
    • To elucidate the cellular mechanisms involved in minicell production.

    Main Methods:

    • Electron microscopy was used to visualize the minicells and their structures.
    • Observation of late-growth-cycle C. jejuni cultures.

    Main Results:

    • Campylobacter jejuni produces very small (0.1-0.3 microM) flagellated minicells late in its growth cycle.

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  • Minicells possess outer membrane, cytoplasmic membrane, flagellar basal complex, and polar membrane, but lack nucleoplasm.
  • Minicell formation involves cytoplasmic membrane constriction, peptidoglycan lysis at the separation site, and outer membrane rupture and resealing.

    • Conclusions:

    • Campylobacter jejuni exhibits a unique mechanism for minicell formation, involving polar shedding.
    • These minicells may play a role in bacterial survival, dissemination, or adaptation.
    • The process highlights novel aspects of bacterial cell division and morphology.