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Updated: Jun 24, 2026
09:08
From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028
Published on: January 13, 2017
Biosynthesis of aromatic polyketides in bacteria
1Department of Chemistry, Stanford University, Stanford, California 94305-5025, USA
Accounts of Chemical Research
|March 19, 2009
Summary
Polyketide synthases (PKSs) in actinomycetes build complex natural products. Understanding these modular enzymes enables engineered biosynthesis of novel compounds with medicinal potential.
Area of Science:
- Biochemistry
- Molecular Biology
- Natural Product Chemistry
Background:
- Natural products are complex molecules synthesized by cellular machinery.
- Polyketide synthases (PKSs) in actinomycetes produce medicinally significant polycyclic aromatic compounds.
- Understanding the modular nature of PKS enzymes is key to biosynthesis.
Purpose of the Study:
- To investigate the biosynthetic pathways of actinorhodin and R1128 (A-D).
- To gain mechanistic insights into modular enzyme systems.
- To explore the potential for engineered biosynthesis of novel polycyclic aromatic compounds.
Main Methods:
- Biosynthetic investigations
- Enzymological studies
- Structural biology analyses
- Examination of minimal PKS and initiation modules
Main Results:
- The minimal PKS synthesizes a reactive poly-beta-ketothioester chain.
- In the absence of other enzymes, minimal PKS initiates and releases polycyclic aromatic compounds.
- Auxiliary and tailoring enzymes modify PKS products into final natural products.
- Investigations provided insights into enzyme interactions and modular assembly.
Conclusions:
- Knowledge of PKS pathways allows control over molecular construction.
- Engineered biosynthesis can introduce unnatural functional groups into natural product scaffolds.
- This research opens avenues for creating novel molecules with potential therapeutic properties.
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