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Revisiting the modularity of modular polyketide synthases.

Chaitan Khosla1, Shiven Kapur, David E Cane

  • 1Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA. khosla@stanford.edu

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Summary

Polyketide synthases (PKS) exhibit modularity, allowing interchangeable parts for diverse functions. This review critically assesses PKS modularity based on structural and biochemical data, discussing challenges for future applications.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Synthetic Biology

Background:

  • Modularity is a key engineering design principle enabling functional flexibility.
  • Polyketide synthases (PKS) are large enzymatic assembly lines known for their modular architecture.
  • Understanding PKS modularity is crucial for harnessing their biosynthetic potential.

Purpose of the Study:

  • To critically evaluate the concept of modularity in polyketide synthases (PKS).
  • To review architectural and functional modularity in PKS based on recent structural and biochemical data.
  • To identify challenges and opportunities for the rational design and exploitation of PKS.

Main Methods:

  • Literature review of atomic structural data.
  • Analysis of in vitro biochemical investigations of PKS.
  • Assessment of architectural and functional modularity.

Main Results:

  • PKS modularity, both architectural and functional, is supported by extensive structural and biochemical evidence.
  • Interchangeability of catalytic domains within PKS modules influences product diversity.
  • Despite advances, precise prediction and control of PKS assembly remain challenging.

Conclusions:

  • PKS modularity offers significant potential for synthetic biology and drug discovery.
  • Further research into PKS structure-function relationships is needed for rational engineering.
  • Overcoming challenges in predicting PKS assembly is key to unlocking their full biosynthetic capabilities.