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Engineering modular ester fermentative pathways in Escherichia coli.

Donovan S Layton1, Cong T Trinh1

  • 1Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, United States.

Metabolic Engineering
|October 5, 2014
PubMed
Summary
This summary is machine-generated.

Researchers engineered microbial cell factories for enhanced ester production. This modular biosynthesis approach, using Escherichia coli, achieved a 48-fold increase in butyrate ester yield from glucose.

Keywords:
Butyrate estersEthyl butyrateFermentationIsobutyl butyrateIsopropyl butyrateModular cell chassis

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Metabolic Engineering

Background:

  • Esters are key aroma and flavor compounds found in nature and used in various industries.
  • Current ester production methods can be inefficient or rely on harsh chemical synthesis.

Purpose of the Study:

  • To develop a modular and 'natural' fermentative biosynthesis system for producing a library of unique esters.
  • To engineer Escherichia coli as a microbial cell factory for enhanced ester production.

Main Methods:

  • Designed exchangeable ester production modules encoding pathways for alcohol and acyl-CoA precursors.
  • Utilized alcohol acyltransferase to condense precursors, creating a combinatorial library of esters.
  • Coupled ester modules with an engineered, modular Escherichia coli chassis for plug-and-play assembly.

Main Results:

  • Successfully created microbial cell factories for anaerobic production of a butyrate ester library.
  • Demonstrated tight coupling between the modular chassis and ester modules for efficient biosynthesis.
  • Achieved up to a 48-fold increase in butyrate ester production compared to wildtype strains.

Conclusions:

  • The developed modular biosynthesis system enables combinatorial ester production via microbial fermentation.
  • Engineered Escherichia coli cell factories show significant improvements in ester yield and offer a platform for metabolic pathway evolution.