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From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028
Published on: January 13, 2017
Abyssomicin I, a modified polycyclic polyketide from Streptomyces sp. CHI39
Yasuhiro Igarashi1, Linkai Yu, Satoshi Miyanaga
1Biotechnology Research Center, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan. yas@pu-toyama.ac.jp
Journal of Natural Products
|October 30, 2010
Summary
A new polyketide, Abyssomicin I, was isolated from soil bacteria. While inactive against microbes, it and its derivative inhibit tumor cell invasion, showing potential for cancer research.
Area of Science:
- Natural Products Chemistry
- Microbiology
- Cancer Research
Background:
- Soil-derived Streptomyces species are a rich source of novel bioactive compounds.
- Polycyclic polyketides represent a diverse class of natural products with various biological activities.
Purpose of the Study:
- To isolate and characterize a new modified polycyclic polyketide from Streptomyces sp.
- To evaluate the biological activities of the new compound and its derivatives, focusing on antimicrobial and anti-invasion properties.
Main Methods:
- Isolation of Abyssomicin I from Streptomyces sp. culture extract.
- Structure elucidation using NMR and other spectroscopic techniques.
- Stereochemistry determination via NOE analysis, chemical derivatization, and modified Mosher method.
- Antimicrobial activity testing against bacteria and yeasts.
- Tumor cell invasion inhibition assays.
Main Results:
- Abyssomicin I (1), a novel modified polycyclic polyketide, was successfully isolated and its structure elucidated.
- Compound 1 showed no activity against bacteria and yeasts.
- An oxidized derivative (7) displayed weak activity against gram-positive bacteria.
- Both Abyssomicin I (1) and its derivative (7) demonstrated significant inhibitory effects on tumor cell invasion, with IC50 values of 11 μM and 0.21 μM, respectively.
Conclusions:
- Abyssomicin I is a new polycyclic polyketide with potent tumor cell invasion inhibitory properties.
- The derivative 7 shows enhanced anti-invasion activity and weak antimicrobial effects.
- These findings highlight the potential of Abyssomicin I and its derivatives as leads for developing novel anti-cancer agents.
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