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Biosynthesis of benanomicins
1Pharmaceutical Research Laboratories, Meiji Seika Kaisha, Ltd., Yokohama, Japan.
The Journal of Antibiotics
|July 1, 1989
Summary
The biosynthesis of benanomicins A and B involves a dodecaketide, methionine, and alanine. Feeding experiments with labeled compounds elucidated the origin of these complex molecules in actinomycete strain MH193-16F4.
Area of Science:
- Microbiology
- Natural Product Biosynthesis
- Organic Chemistry
Background:
- Benanomicins A and B are bioactive compounds produced by actinomycete strain MH193-16F4.
- Understanding the biosynthetic pathways of such natural products is crucial for drug discovery and development.
Purpose of the Study:
- To investigate the biosynthetic origins of benanomicins A and B.
- To elucidate the precursor molecules involved in benanomicin biosynthesis.
Main Methods:
- Feeding experiments using 14C- and 13C-labeled compounds.
- Radioactivity measurements.
- Carbon-13 Nuclear Magnetic Resonance (13C NMR) analysis, including 2D double quantum coherence NMR.
Main Results:
- Confirmed the incorporation of intact acetate units into benanomicin A.
- Verified the 13C assignments of benanomicins through NMR analysis.
- Indicated that the aglycone of benanomicins is derived from a dodecaketide, methionine, and alanine.
Conclusions:
- The biosynthetic pathway of benanomicins A and B involves a dodecaketide precursor, along with methionine and alanine.
- Detailed elucidation of benanomicin biosynthesis provides insights into the assembly of complex polyketide-derived natural products.