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Related Experiment Videos

Mutation affecting peptide bond formation in nikkomycin biosynthesis.

P Engel1, A H Ullah

  • 1Southern Regional Research Laboratory, USDA, New Orleans, LA 70124.

Biochemical and Biophysical Research Communications
|October 31, 1988
PubMed
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Researchers identified a specific mutation in Streptomyces tendae affecting nikkomycin biosynthesis. This mutation prevents the formation of the peptide bond, halting the production of active nikkomycin Z.

Area of Science:

  • Microbiology
  • Biochemistry
  • Molecular Biology

Background:

  • Nikkomycin is a potent chitin synthase inhibitor produced by Streptomyces tendae.
  • Chitin synthase inhibition is a target for antifungal and agricultural applications.
  • Understanding nikkomycin biosynthesis is crucial for optimizing its production.

Purpose of the Study:

  • To investigate the biochemical basis of nikkomycin biosynthesis.
  • To identify the specific defect in a non-producing mutant (Nik 15).
  • To elucidate the terminal step in nikkomycin Z synthesis.

Main Methods:

  • High-performance liquid chromatography (HPLC) analysis of fermentation products.
  • Comparison of mutant (Nik 15) culture broths with nikkomycin standards.

Related Experiment Videos

  • Biochemical characterization of accumulated moieties.

    • Main Results:

    • The Nik 15 mutant accumulated nikkomycin C (glycone) and nikkomycin D (aglycone).
    • The mutation impairs the formation of the peptide bond between nikkomycin C and D.
    • This suggests the peptide bond formation is the terminal step in nikkomycin Z biosynthesis.

    Conclusions:

    • The study identifies a specific mutation affecting nikkomycin biosynthesis.
    • This is the first documented case of a mutation impacting a defined step in nikkomycin production.
    • The findings provide insights into the regulation and optimization of nikkomycin synthesis.