Properties of the NAD(P)H-dependent xylose reductase from the xylose-fermenting yeast Pichia stipitis
Year: 1985
Type: article
Abstract: Xylose reductase from the xylose-fermenting yeast Pichia stipitis was purified to electrophoretic and spectral homogeneity via ion-exchange, affinity and high-performance gel chromatography. The enzyme was active with various aldose substrates, such as DL-glyceraldehyde, L-arabinose, D-xylose, D-ribose, D-galactose and D-glucose. Hence the xylose reductase of Pichia stipitis is an aldose reductase (EC 1.1.1.21). Unlike all aldose reductases characterized so far, the enzyme from this yeast was active with both NADPH and NADH as coenzyme. The activity with NADH was approx. 70% of that with NADPH for the various aldose substrates. NADP+ was a potent inhibitor of both the NADPH- and NADH-linked xylose reduction, whereas NAD+ showed strong inhibition only with the NADH-linked reaction. These results are discussed in the context of the possible use of Pichia stipitis and similar yeasts for the anaerobic conversion of xylose into ethanol.
Source: Biochemical Journal
DOI: 10.1042/bj2260669
Institution: Delft University of Technology
Language: English
Topic: Aldose Reductase and Taurine
Subfield: Cell Biology
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W1855933245