Engineering Yarrowia lipolytica as a platform for synthesis of drop-in transportation fuels and oleochemicals

Peng Xu, Kangjian Qiao, Woo Suk Ahn, Gregory Stephanopoulos*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

231 Scopus citations

Abstract

Harnessing lipogenic pathways and rewiring acyl-CoA and acyl-ACP (acyl carrier protein) metabolism in Yarrowia lipolytica hold great potential for cost-efficient production of diesel, gasoline-like fuels, and oleochemicals. Here we assessed various pathway engineering strategies in Y. lipolytica toward developing a yeast biorefinery platform for sustainable production of fuel-like molecules and oleochemicals. Specifically, acyl-CoA/acyl-ACP processing enzymes were targeted to the cytoplasm, peroxisome, or endoplasmic reticulum to generate fatty acid ethyl esters and fatty alkanes with tailored chain length. Activation of endogenous free fatty acids and the subsequent reduction of fatty acyl-CoAs enabled the efficient synthesis of fatty alcohols. Engineering a hybrid fatty acid synthase shifted the free fatty acids to a medium chain-length scale. Manipulation of alternative cytosolic acetyl-CoA pathways partially decoupled lipogenesis from nitrogen starvation and unleashed the lipogenic potential of Y. lipolytica. Taken together, the strategies reported here represent promising steps to develop a yeast biorefinery platform that potentially upgrades low-value carbons to high-value fuels and oleochemicals in a sustainable and environmentally friendly manner.

Original languageEnglish
Pages (from-to)10848-10853
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume113
Issue number39
DOIs
StatePublished - 27 Sep 2016
Externally publishedYes

Keywords

  • Advanced biofuels
  • Metabolic engineering
  • Oleaginous yeast
  • Oleochemicals
  • Synthetic biology

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