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Combinatorial approaches to polyketide biosynthesis

P F Leadlay1

  • 1Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK. pfl10@mole.bio.cam.ac.uk

Current Opinion in Chemical Biology
|August 1, 1997
PubMed
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Scientists engineered hybrid polyketide synthases to create novel natural products. This approach combines enzyme components to generate diverse libraries of aromatic and reduced polyketides.

Area of Science:

  • Biochemistry
  • Synthetic Biology
  • Natural Product Discovery

Background:

  • Polyketides are diverse natural products synthesized by polyketide synthases (PKS).
  • Existing methods utilize combinatorial biosynthesis of aromatic PKS for library generation.
  • Complex reduced polyketides are synthesized by large multienzyme complexes.

Purpose of the Study:

  • To develop a combinatorial approach for generating libraries of complex reduced polyketides.
  • To demonstrate the feasibility of creating functional hybrid polyketide synthases by domain fusion.
  • To explore novel polyketide structures through enzyme engineering.

Main Methods:

  • Fusing individual enzymatic domains from different polyketide synthases.
  • Expressing engineered multienzyme complexes to produce novel compounds.

Related Experiment Videos

  • Utilizing a broad-specificity enzyme for chain starter recruitment in a hybrid system.

    • Main Results:

    • Demonstrated that genuinely hybrid enzymes function as predicted.
    • Successfully grafted an enzyme domain from one pathway onto a different synthase.
    • Generated libraries of altered polyketide products through engineered enzyme assembly lines.

    Conclusions:

    • Enzyme domain fusion is a viable strategy for combinatorial biosynthesis of complex polyketides.
    • This approach enables the creation of novel hybrid molecules with potential therapeutic applications.
    • Engineering polyketide synthases offers a powerful tool for natural product discovery.