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Updated: Mar 30, 2026

From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028
Published on: January 13, 2017
Stereocontrol within polyketide assembly lines.
1Department of Molecular Biosciences, The University of Texas at Austin, 2506 Speedway Stop A5000, Austin, TX 78712, USA. adriankc@utexas.edu and Department of Chemistry, The University of Texas at Austin, 105 E 24th St. Stop A5300, Austin, TX 78712, USA.
This study examines how enzymes create stereocenters in polyketide natural products. Atomic-resolution models reveal the mechanisms of key enzymes involved in this complex biosynthetic process.
Area of Science:
- Biochemistry
- Organic Chemistry
- Structural Biology
Background:
- Polyketide natural products possess numerous stereocenters crucial for their biological activity.
- Assembly line biosynthesis by polyketide synthases (PKSs) is the primary mechanism for establishing these stereocenters.
Purpose of the Study:
- To construct physical models of key stereocenter-forming reactions in polyketide biosynthesis.
- To examine enzyme-intermediate interactions at atomic resolution.
Main Methods:
- Analysis of current structural and functional data for PKS enzymes.
- Focus on ketosynthases (KSs), ketoreductases (KRs), dehydratases (DHs), and enoylreductases (ERs).
Main Results:
- Detailed examination of atomic interactions between chirality-molding enzymes and polyketide intermediates.
- Insights into the chemical and physical mechanisms employed by PKS enzymes.
Conclusions:
- Understanding of the mechanisms governing stereocenter formation in polyketides is rapidly advancing.
- Physical models are becoming feasible for key enzymatic reactions in PKS pathways.
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