Transmembrane Shuttling of Photosynthetically Produced Electrons to Propel Extracellular Biocatalytic Redox Reactions in a Modular Fashion

Valentina Jurkaš, Florian Weissensteiner, Piera De Santis, Stephan Vrabl, Frieda A. Sorgenfrei, Sarah Bierbaumer, Selin Kara, Robert Kourist, Pramod P. Wangikar, Christoph K. Winkler*, Wolfgang Kroutil

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Many biocatalytic redox reactions depend on the cofactor NAD(P)H, which may be provided by dedicated recycling systems. Exploiting light and water for NADPH-regeneration as it is performed, e.g. by cyanobacteria, is conceptually very appealing due to its high atom economy. However, the current use of cyanobacteria is limited, e.g. by challenging and time-consuming heterologous enzyme expression in cyanobacteria as well as limitations of substrate or product transport through the cell wall. Here we establish a transmembrane electron shuttling system propelled by the cyanobacterial photosynthesis to drive extracellular NAD(P)H-dependent redox reactions. The modular photo-electron shuttling (MPS) overcomes the need for cloning and problems associated with enzyme- or substrate-toxicity and substrate uptake. The MPS was demonstrated on four classes of enzymes with 19 enzymes and various types of substrates, reaching conversions of up to 99 % and giving products with >99 % optical purity.

Original languageEnglish
Article numbere202207971
JournalAngewandte Chemie - International Edition
Volume61
Issue number40
DOIs
Publication statusPublished - 4 Oct 2022

Keywords

  • Biocatalysis
  • Photocatalysis
  • Redox Chemistry
  • Reductions
  • Transmembrane Shuttling

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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