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Related Experiment Videos

Peptide uptake in Candida albicans

M B Davies

    Journal of General Microbiology
    |November 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Candida albicans utilizes a specific permease for transporting di- and tripeptides, requiring energy and specific peptide structures. This system facilitates the uptake and subsequent release of peptides and amino acids.

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    Area of Science:

    • Microbiology
    • Molecular Biology
    • Biochemistry

    Background:

    • Candida albicans is an opportunistic fungal pathogen.
    • Understanding nutrient transport is crucial for studying fungal physiology and pathogenicity.
    • Peptide transport systems play a vital role in amino acid acquisition for many organisms.

    Purpose of the Study:

    • To characterize the transport system for di- and tripeptides in Candida albicans.
    • To determine the energy dependence and substrate specificity of this peptide permease.

    Main Methods:

    • Utilized radioactively labeled peptides to track transport.
    • Measured the accumulation of intact peptides and component amino acids within the cell.
    • Investigated the conditions affecting peptide and amino acid leakage from the cell.

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    Main Results:

    • Identified a common transport system for di- and tripeptides in Candida albicans.
    • Demonstrated that this permease is energy-dependent.
    • Showed the system requires L-amino acid residues, alpha-linkage, and a free amino terminus.
    • Observed accumulation and subsequent leakage of glycyl-[U-14C]phenylalanine.

    Conclusions:

    • Candida albicans possesses a distinct, energy-dependent permease for di- and tripeptide uptake.
    • The characterized permease exhibits specific structural requirements for its substrates.
    • The transport and subsequent release mechanisms warrant further investigation for potential therapeutic targets.