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Chip-based polyketide biosynthesis and functionalization.

Bosung Ku1, Junhoe Cha, Aravind Srinivasan

  • 1Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.

Biotechnology Progress
|August 8, 2006
PubMed
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This study showcases a microfluidic biochip for synthesizing novel compounds using immobilized enzymes. The system enables efficient production of polyketide derivatives, accelerating metabolic pathway engineering and new compound discovery.

Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Chemical Engineering

Background:

  • Metabolic pathway engineering is crucial for novel compound discovery.
  • Microfluidic platforms offer advantages for biocatalysis and synthetic biology.
  • Enzyme immobilization is key for efficient and reusable biocatalytic systems.

Purpose of the Study:

  • To construct and demonstrate a microfluidic platform for novel compound synthesis.
  • To engineer a synthetic metabolic pathway using immobilized enzymes.
  • To explore substrate specificity and optimize reaction conditions for polyketide derivative production.

Main Methods:

  • Immobilization of 1,3,6,8-tetrahydroxynaphthalene synthase (THNS) and soybean peroxidase (SBP) in microfluidic channels.
  • Tandem two-step biochip design for sequential enzymatic reactions.

Related Experiment Videos

  • Manipulation of reaction pH and substrate feed rates to control enzyme activity and product formation.

    • Main Results:

    • Achieved up to 40% yield of flaviolin from malonyl-CoA using THNS in 6 minutes.
    • Demonstrated biflaviolin synthesis by linking THNS and SBP microchannels.
    • Broadened THNS substrate specificity by altering pH, yielding diverse pyrone products.

    Conclusions:

    • The microfluidic platform enables rapid synthesis and structural diversification of polyketide derivatives.
    • Enzyme engineering and pathway reconstruction in microfluidics offer a new approach for compound discovery.
    • This technology accelerates the evaluation of synthetic multienzyme pathways for biotechnological applications.