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Control of liposidomycin production through precursor-directed biosynthesis
Shinobu Kagami1, Yasuaki Esumi, Masamichi Nakakoshi
1Research Institute of Life Science, Snow Brand Milk Products, Co. Ltd., 519 Ishibashi-machi, Shimotsuga-gun, Tochigi 329-0512, Japan.
The Journal of Antibiotics
|August 23, 2003
Summary
This study shows that adding specific fatty acids to Streptomyces cultures alters the production of liposidomycin antibiotics. These fatty acids are directly incorporated into the final antibiotic structure.
Area of Science:
- Microbiology
- Biochemistry
- Synthetic Biology
Background:
- Liposidomycin is a key inhibitor of bacterial peptidoglycan biosynthesis.
- It belongs to a class of over 24 related fatty acyl nucleoside antibiotics from Streptomyces.
- Understanding its biosynthesis is crucial for developing new antibacterial agents.
Purpose of the Study:
- To investigate the influence of exogenously supplied fatty acids on liposidomycin production.
- To determine the direct incorporation of these fatty acids into the antibiotic structure.
Main Methods:
- Culturing Streptomyces with myristic acid or palmitic acid.
- Analyzing the produced liposidomycin variants using Fast Atom Bombardment Mass Spectrometry (FAB-MS).
- Utilizing Carbon-13 Nuclear Magnetic Resonance (13C NMR) spectroscopy for structural analysis.
Main Results:
- Myristic acid and palmitic acid supplementation led to the predominant production of liposidomycin C-(III) and/or M-(III).
- Incorporation of [1-13C]-palmitic acid into liposidomycin M-(III) was confirmed.
- FAB-MS and 13C NMR spectra provided evidence for direct fatty acid incorporation.
Conclusions:
- Exogenous fatty acid supply can direct the biosynthesis of specific liposidomycin variants.
- This provides a method for tailoring antibiotic production.
- The findings contribute to the understanding of fatty acyl nucleoside antibiotic biosynthesis.