Identification in the mold Hypocrea jecorina of the first fungal D-galacturonic acid reductase

Satu Kuorelahti, Nisse Kalkkinen, Merja Penttilä, John Londesborough, Peter Richard

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)

Abstract

A D-galacturonic acid reductase and the corresponding gene were identified from the mold Hypocrea jecorina (Trichoderma reesei). We hypothesize that the enzyme is part of a fungal D-galacturonic acid catabolic pathway which has not been described previously and which is distinctly different from the bacterial pathway. H. jecorina grown on D-galacturonic acid exhibits an NADPH-dependent D-galacturonic acid reductase activity. This activity is absent when the mold is grown on other carbon sources. The D-galacturonic acid reductase was purified, and tryptic digests of the purified protein were sequenced. The open reading frame of the corresponding gene was then cloned from a cDNA library. The open reading frame was functionally expressed in the yeast Saccharomyces cerevisiae. A histidine-tagged protein was purified, and the enzyme kinetics were characterized. The enzyme converts in a reversible reaction from D-galacturonic acid and NADPH to L-galactonic acid and NADP. The enzyme also exhibits activity with D-glucuronic acid and DL-glyceraldehyde.

Original languageEnglish
Pages (from-to)11234-11240
Number of pages7
JournalBiochemistry
Volume44
Issue number33
DOIs
Publication statusPublished - 23 Aug 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

Hypocrea
NADP
Fungi
Yeast
Enzymes
Genes
Glyceraldehyde
Open Reading Frames
Enzyme kinetics
Glucuronic Acid
Gene Library
Histidine
Trichoderma
Proteins
Carbon
Saccharomyces cerevisiae
Yeasts
D-galacturonate reductase
galacturonic acid

Keywords

  • Bacteria
  • carbon
  • cloning
  • DNA
  • genes
  • Yeast
  • Hypocrea jecorina
  • Saccharomyces cerevisiae

Cite this

Kuorelahti, Satu ; Kalkkinen, Nisse ; Penttilä, Merja ; Londesborough, John ; Richard, Peter. / Identification in the mold Hypocrea jecorina of the first fungal D-galacturonic acid reductase. In: Biochemistry. 2005 ; Vol. 44, No. 33. pp. 11234-11240.
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Identification in the mold Hypocrea jecorina of the first fungal D-galacturonic acid reductase. / Kuorelahti, Satu; Kalkkinen, Nisse; Penttilä, Merja; Londesborough, John; Richard, Peter.

In: Biochemistry, Vol. 44, No. 33, 23.08.2005, p. 11234-11240.

Research output: Contribution to journalArticleScientificpeer-review

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