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Decrease in respiration activity related to prodigiosin synthesis in Serratia marcescens.

N Kobayashi, Y Ichikawa

    Microbiology and Immunology
    |January 1, 1985
    PubMed
    Summary
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    Prodigiosin synthesis in Serratia marcescens reduces cell respiration activity. Pigmented strains show decreased respiration earlier, especially when prodigiosin production is induced, impacting cell membrane function.

    Area of Science:

    • Microbiology
    • Biochemistry

    Background:

    • Serratia marcescens is a bacterium known for producing the red pigment prodigiosin.
    • Cellular respiration is a fundamental metabolic process crucial for energy production in bacteria.

    Purpose of the Study:

    • To investigate the relationship between prodigiosin synthesis and cell respiration rate in Serratia marcescens.
    • To determine if prodigiosin production affects the respiratory activity and cell membrane function.

    Main Methods:

    • Comparing the respiration rates of pigmented and nonpigmented Serratia marcescens strains.
    • Measuring oxygen consumption in sonicated cell membranes with NADH.
    • Assessing the sensitivity of cell membranes to respiration inhibitors.

    Main Results:

    Related Experiment Videos

    • Pigmented strains exhibited an earlier decrease in respiration rate during specific growth phases compared to nonpigmented strains.
    • Prodigiosin synthesis, when induced, correlated with a lower oxygen consumption rate in cell membranes.
    • Cell membranes of prodigiosin-induced organisms were more susceptible to respiration inhibitors.

    Conclusions:

    • Prodigiosin synthesis directly decreases the respiration activity in Serratia marcescens.
    • The production of prodigiosin impacts the cell membrane's respiratory function and its response to inhibitors.