Enzymatic Oxyfunctionalization Driven by Photosynthetic Water-Splitting in the Cyanobacterium Synechocystis sp PCC 6803

Stefanie Boehmer, Katharina Koeninger, Alvaro Gomez-Baraibar, Samiro Bojarra, Carolin Muegge, Sandy Schmidt, Marc M. Nowaczyk, Robert Kourist*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)
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Abstract

Photosynthetic water-splitting is a powerful force to drive selective redox reactions. The need of highly expensive redox partners such as NADPH and their regeneration is one of the main bottlenecks for the application of biocatalysis at an industrial scale. Recently, the possibility of using the photosystem of cyanobacteria to supply high amounts of reduced nicotinamide to a recombinant enoate reductase opened a new strategy for overcoming this hurdle. This paper presents the expansion of the photosynthetic regeneration system to a Baeyer-Villiger monooxygenase. Despite the potential of this strategy, this work also presents some of the encountered challenges as well as possible solutions, which will require further investigation. The successful enzymatic oxygenation shows that cyanobacterial whole-cell biocatalysis is an applicable approach that allows fuelling selective oxyfunctionalisation reactions at the expense of light and water. Yet, several hurdles such as side-reactions and the cell-density limitation, probably due to self-shading of the cells, will have to be overcome on the way to synthetic applications.

Original languageEnglish
Article number240
Number of pages8
JournalCatalysts
Volume7
Issue number8
DOIs
Publication statusPublished - Aug-2017
Externally publishedYes

Keywords

  • photosynthesis
  • catalytic water-splitting
  • Baeyer-Villiger oxidation
  • cyanobacteria
  • recombinant enzyme expression
  • ASYMMETRIC REDUCTION

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