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A Web Tool for Generating High Quality Machine-readable Biological Pathways
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Direct Combinatorial Pathway Optimization.

Pieter Coussement1, David Bauwens1, Jo Maertens1

  • 1Department of Biochemical and Microbial Technology, Ghent University , Coupure Links 653, 9000 Gent, Belgium.

ACS Synthetic Biology
|September 28, 2016
PubMed
Summary

This study introduces a novel method combining Single Strand Assembly (SSA) and Golden Gate Assembly for efficient construction of multigene pathways. This approach significantly enhances lycopene production, achieving a 3-fold improvement.

Keywords:
E. colicombinatorial pathway optimizationlycopene

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Area of Science:

  • Synthetic Biology
  • Metabolic Engineering
  • Molecular Biology

Background:

  • Combinatorial engineering is valuable but limited by DNA assembly and variability introduction methods.
  • Constructing lengthy multigene pathways requires efficient techniques for sequence variation and DNA part assembly.

Purpose of the Study:

  • To develop a new combinatorial multigene pathway assembly scheme.
  • To enable efficient introduction of sequence libraries and assembly of complex genetic pathways.
  • To optimize the lycopene pathway as a proof-of-principle.

Main Methods:

  • Developed a workflow integrating Single Strand Assembly (SSA) and Golden Gate Assembly.
  • Utilized a set of well-characterized, ready-to-use genetic parts and plasmids.
  • Applied the method to optimize the lycopene biosynthetic pathway.

Main Results:

  • Achieved efficient assembly of multigene pathways with minimal steps.
  • Generated libraries with substantial variation in lycopene production.
  • Obtained transformants with significantly higher lycopene titers (up to 448 mg/g CDW), a 3-fold improvement over references.

Conclusions:

  • The proposed workflow effectively addresses limitations in combinatorial pathway assembly.
  • The method facilitates the construction of increasingly lengthy product pathways with reduced effort.
  • Optimized lycopene production demonstrates the practical utility of the developed assembly scheme.