On the Mediated Electron Transfer of Immobilized Galactose Oxidase for Biotechnological Applications

Fangyuan Zhao, Ann Cathrin Brix, Anna Lielpetere, Wolfgang Schuhmann, Felipe Conzuelo

Research output: Contribution to journalArticlepeer-review

Abstract

The use of enzymes as catalysts in chemical synthesis offers advantages in terms of clean and highly selective transformations. Galactose oxidase (GalOx) is a remarkable enzyme with several applications in industrial conversions as it catalyzes the oxidation of primary alcohols. We have investigated the wiring of GalOx with a redox polymer; this enables mediated electron transfer with the electrode surface for its potential application in biotechnological conversions. As a result of electrochemical regeneration of the catalytic center, the formation of harmful H2O2 is minimized during enzymatic catalysis. The introduced bioelectrode was applied to the conversion of bio-renewable platform materials, with glycerol as model substrate. The biocatalytic transformations of glycerol and 5-hydroxymethylfurfural (HMF) were investigated in a circular flow-through setup to assess the possibility of substrate over-oxidation, which is observed for glycerol oxidation but not during HMF conversion.

Original languageEnglish
Article numbere202200868
JournalChemistry - A European Journal
Volume28
Issue number30
DOIs
Publication statusPublished - 25 May 2022

Keywords

  • bio-electrocatalysis
  • galactose oxidase
  • glycerol oxidation
  • modified electrodes
  • redox polymers

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