Metabolic engineering of Saccharomyces cerevisiae for production of very long chain fatty acid-derived chemicals

Nat Commun. 2017 May 26:8:15587. doi: 10.1038/ncomms15587.

Abstract

Production of chemicals and biofuels through microbial fermentation is an economical and sustainable alternative for traditional chemical synthesis. Here we present the construction of a Saccharomyces cerevisiae platform strain for high-level production of very-long-chain fatty acid (VLCFA)-derived chemicals. Through rewiring the native fatty acid elongation system and implementing a heterologous Mycobacteria FAS I system, we establish an increased biosynthesis of VLCFAs in S. cerevisiae. VLCFAs can be selectively modified towards the fatty alcohol docosanol (C22H46O) by expressing a specific fatty acid reductase. Expression of this enzyme is shown to impair cell growth due to consumption of VLCFA-CoAs. We therefore implement a dynamic control strategy for separating cell growth from docosanol production. We successfully establish high-level and selective docosanol production of 83.5 mg l-1 in yeast. This approach will provide a universal strategy towards the production of similar high value chemicals in a more scalable, stable and sustainable manner.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aldehyde Oxidoreductases / genetics
  • Aldehyde Oxidoreductases / metabolism
  • Bacterial Proteins / genetics
  • Bacterial Proteins / metabolism
  • Biofuels
  • Fatty Acid Synthases / genetics
  • Fatty Acid Synthases / metabolism
  • Fatty Acids / biosynthesis*
  • Fatty Acids / chemistry
  • Fatty Alcohols / chemistry
  • Fatty Alcohols / metabolism*
  • Fermentation
  • Green Chemistry Technology / methods*
  • Metabolic Engineering / methods*
  • Metabolic Networks and Pathways / genetics
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism*

Substances

  • Bacterial Proteins
  • Biofuels
  • Fatty Acids
  • Fatty Alcohols
  • docosanol
  • Aldehyde Oxidoreductases
  • fatty acid reductase
  • Fatty Acid Synthases
  • fatty acid synthase I, mycobacteria