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[Directed synthesis of macrotetrolides].

M V Nefelova, A N Sverdlova, N S Egorov

    Prikladnaia Biokhimiia I Mikrobiologiia
    |November 1, 1987
    PubMed
    Summary

    Cultivation conditions and organic acid precursors significantly alter macrotetrolide composition in Streptomyces chrysomallus. Inhibitors also modify macrotetrolide biosynthesis, impacting homologue ratios and yields.

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    Area of Science:

    • Microbiology
    • Natural Product Chemistry
    • Biochemistry

    Context:

    • Macrotetrolides are a class of ionophorous antibiotics produced by Streptomyces species.
    • Their biological activity and applications are influenced by their structural diversity.
    • Understanding the biosynthesis of macrotetrolides is crucial for optimizing their production.

    Purpose:

    • To investigate the impact of cultivation conditions and specific precursors on the composition of the macrotetrolide complex produced by Streptomyces chrysomallus v. macrotetrolidi.
    • To explore the effects of metabolic inhibitors on macrotetrolide biosynthesis and the resulting changes in homologue distribution.

    Summary:

    • The macrotetrolide complex composition is highly sensitive to Streptomyces chrysomallus cultivation parameters.
    • Supplementation with organic acids (acetic, propionic, succinic) differentially affects nonactin and higher homologue production.
    • Specific inhibitors like malonate and methylmalonate mutase analogues modulate the biosynthesis of ethylated and methylated macrotetrolide homologues, while sulfadimesin shows no effect.

    Impact:

    • This study provides insights into the metabolic pathways governing macrotetrolide biosynthesis.
    • Findings can guide strategies for targeted production of specific macrotetrolide homologues with desired properties.
    • Optimization of macrotetrolide production through precursor and inhibitor manipulation holds potential for industrial applications.

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