Biotechnology Reports (Jun 2021)

Characterization of d-xylose reductase, XyrB, from Aspergillus niger

  • Agata Terebieniec,
  • Tania Chroumpi,
  • Adiphol Dilokpimol,
  • Maria Victoria Aguilar-Pontes,
  • Miia R. Mäkelä,
  • Ronald P. de Vries

Journal volume & issue
Vol. 30
p. e00610

Abstract

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d-xylose reductase is a member of the aldo-keto reductase family, and is involved in d-xylose and l-arabinose conversion through the Pentose Catabolic Pathway (PCP) in fungi. In this study, we biochemically characterized a newly identified second d-xylose reductase (XyrB) from Aspergillus niger. This NADPH-dependent reductase is able to efficiently convert d-xylose and l-arabinose, and it has the highest affinity for these sugars of all currently known fungal pentose reductases. A combination of biochemical data, transcriptomics and phylogenetic analysis further illustrated the role of XyrB in the PCP.Enzymes: D-xylose reductase (EC 1.1.1.307), L-arabinose reductase (EC 1.1.1.21).

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