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Related Experiment Videos

[Respiratory chain of Candida mycoderma].

G V Sokolov, S S Eremina, A B Lozinov

    Mikrobiologiia
    |July 1, 1977
    PubMed
    Summary

    Candida mycoderma respiration involves two electron transport pathways. Both pathways and two NADH-dehydrogenases are utilized differently across growth phases, impacting cellular respiration.

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    Area of Science:

    • Biochemistry
    • Microbiology
    • Cellular Respiration

    Background:

    • The yeast Candida mycoderma utilizes complex respiration pathways.
    • Understanding these pathways is crucial for comprehending yeast metabolism and energy production.

    Purpose of the Study:

    • To investigate the respiration chain of Candida mycoderma during growth on glucose.
    • To elucidate the distinct roles of electron transport pathways and NADH-dehydrogenases across different growth phases.

    Main Methods:

    • Inhibitory analysis of respiration in intact cells.
    • Measurement of electron carrier reduction extent.
    • Utilized cyanide, antimycin A, salicyl- or benzhydroxamic acid, and rotenone as inhibitors.

    Main Results:

    • Two distinct electron transport pathways were identified: cyanide-sensitive and cyanide-resistant (CrPET).
    • Two flavoprotein NADH-dehydrogenases (rotenone-sensitive and rotenone-resistant) were found.
    • Pathway usage and dehydrogenase involvement varied with growth phase: exponential (pathway 1, rotenone-resistant dehydrogenase), decreasing growth (both pathways, both dehydrogenases), stationary (CrPET, both dehydrogenases).
    • Hydrogen peroxide (H2O2) can act as a terminal electron acceptor.

    Conclusions:

    • Candida mycoderma employs dynamic respiration strategies adapting to growth phases.
    • The interplay between electron transport pathways and NADH-dehydrogenases is key to metabolic flexibility.

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