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Related Experiment Videos

Effect of lysozyme on enterococcal viability in low ionic environments.

R H Metcalf, R H Deibel

    Journal of Bacteriology
    |January 1, 1973
    PubMed
    Summary
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    Lysozyme

    Area of Science:

    • Microbiology
    • Biochemistry
    • Cell Biology

    Background:

    • Lysozyme is an enzyme known for its antibacterial properties.
    • Its effect on enterococcal cells is influenced by environmental factors.
    • Understanding lysozyme's mechanism is crucial for developing new antimicrobial strategies.

    Purpose of the Study:

    • To investigate the impact of ionic strength on lysozyme's action on enterococcal cells.
    • To elucidate the specific mechanisms by which lysozyme affects cell viability and integrity.
    • To explore potential cell membrane interactions of lysozyme.

    Main Methods:

    • Treatment of enterococcal cells with lysozyme under varying ionic strengths (high and low).
    • Assessment of cell wall hydrolysis, cellular integrity, and viability.

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  • Analysis of cellular macromolecules (protein, DNA, RNA) and metabolic activity.

    • Main Results:

    • In high ionic environments, lysozyme showed a slow lytic response and decreased viability.
    • In low ionic environments, cell walls were hydrolyzed, but cellular integrity was maintained.
    • Lysozyme inactivated energy metabolism in low ionic conditions, leading to rapid viability loss.

    Conclusions:

    • Lysozyme's effect on enterococcal cells is highly dependent on ionic strength.
    • Lysozyme appears to target the cell membrane, disrupting cellular metabolism and viability.
    • Ionic strength modulates lysozyme's lytic activity and impact on bacterial survival.