Poly-3-hydroxybutyrate production in acetate minimal medium using engineered Methylorubrum extorquens AM1

Jihee Yoon, Jiyun Bae, Seulgi Kang, Byung Kwan Cho, Min Kyu Oh

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Acetate is regarded as a sustainable microbial feedstock that is synthesized from biowastes such as synthesis gas (syngas), carbon dioxide, lignocellulose, or organic waste. In this study, Methylorubrum extorquens AM1 was engineered to improve the production of bioplastic poly-3-hydroxybutyrate (PHB) using acetate as the sole carbon source. To utilize acetate as a carbon source and methanol as an energy source, acs encoding acetyl-CoA synthetase and fdh from Burkholderia stabilis were overexpressed, while ftfL involved in the assimilation of methanol into formyl-tetrahydrofolate was deleted. The yields of biomass and PHB from acetate significantly improved, and the growth rate and PHB content of the bacteria increased. In addition, sustainability of the PHB production was demonstrated using acetate derived from carbon dioxide and syngas. This study shows that biopolymers could be synthesized efficiently using acetate as the sole carbon source through metabolic engineering and the supply of energy cofactors.

Original languageEnglish
Article number127127
JournalBioresource technology
Volume353
DOIs
Publication statusPublished - 2022 Jun

Keywords

  • Acetate
  • C1 gas
  • Metabolic engineering
  • Methylorubrum extorquens AM1
  • Poly-3-hydroxybutyrate

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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