Trehalose production by Cupriavidus necator from CO2 and hydrogen gas

Hannes Löwe, Marleen Beentjes, Katharina Pflüger-Grau, Andreas Kremling

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this work, the hydrogen-oxidizing bacterium Cupriavidus necator H16 was engineered for trehalose production from gaseous substrates. First, it could be shown that C. necator is a natural producer of trehalose when stressed with sodium chloride. Bioinformatic investigations revealed a so far unknown mode of trehalose and glycogen metabolism in this organism. Next, it was found that expression of the sugar efflux transporter A (setA) from Escherichia coli lead to a trehalose leaky phenotype of C. necator. Finally, the strain was characterized under autotrophic conditions using a H2/CO2/O2-mixture and other substrates reaching titers of up to 0.47 g L−1 and yields of around 0.1 g g−1. Taken together, this process represents a new way to produce sugars with high areal efficiency. With further metabolic engineering, an application of this technology for the renewable production of trehalose and other sugars, as well as for the synthesis of 13C-labeled sugars seems promising.

Original languageEnglish
Article number124169
JournalBioresource Technology
Volume319
DOIs
StatePublished - Jan 2021

Keywords

  • Bioeconomy
  • C-labelled sugar
  • Cupriavidus necator
  • Hydrogen-oxidizing bacteria
  • Sugar efflux transporter
  • Syngas fermentation
  • Trehalose

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