Metabolic engineering of 2-pentanone synthesis in Escherichia coli

Ethan I. Lan, Yasumasa Dekishima, Derrick S. Chuang, James C. Liao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Expanding the chemical diversity of microbial fermentation products enables green production of fuel, chemicals, and pharmaceuticals. In recent years, coenzyme A (CoA) dependent chain elongation, resembling the reversed β-oxidation pathway, has attracted interest for its use in producing higher alcohols, fatty acids, and polyhydroxyalkanoate. To expand the chemical diversity of this pathway, we metabolically engineered Escherichia coli to produce 2-pentanone, which is not a natural fermentation product of E. coli. We describe the first demonstration of 2-pentanone synthesis in E. coli by coupling the CoA-dependent chain elongation with the acetone production pathway. By bioprospecting for enzymes capable of efficient hydrolysis of 3-keto-hexanoyl-CoA, production of 2-pentanone increased 20 fold, reaching a titer of 240 mg/L.

Original languageEnglish
Pages (from-to)3167-3175
Number of pages9
JournalAIChE Journal
Volume59
Issue number9
DOIs
StatePublished - 1 Sep 2013

Keywords

  • 3-ketohexanoyl-CoA
  • Beta oxidation
  • Biofuel
  • CoA transferase
  • Renewable chemical

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