An α-glucuronidase from Trichoderma reesei RUT C-30

Matti Siika-aho, Maija Tenkanen, Johanna Buchert, Jurgen Puls, Liisa Viikari

Research output: Contribution to journalArticleScientificpeer-review

51 Citations (Scopus)

Abstract

The major α-glucuronidase of T. reesei Rut C-30 was purified by chromatographic methods. The molecular and hydrolytic properties of the purified enzyme were studied. The enzyme had a molecular weight of 91,000 in sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and a pI of 5.0–6.2 as determined by chromatofocusing. The pH optimum was pH 4.5–6.0 and the enzyme was stable for 24 h at 40°C at pH 4.8–5.5. The purified α-glucuronidase preferred low-molecular-weight xylooligomers as substrate. The enzyme seemed to act almost exclusively on the bond between the terminal xylose at the nonreducing end of a xylose chain and the methyl glucuronic acid attached to it. Minor activity against long-chain glucuronoxylan was also detected. A significant enhancing effect of α-glucuronidase on the hydrolysis of glucuronoxylan by pure xylanases was observed.
Original languageEnglish
Pages (from-to)813-819
Number of pages7
JournalEnzyme and Microbial Technology
Volume16
Issue number9
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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