Identification of thermostable β-xylosidase activities produced by Aspergillus brasiliensis and Aspergillus niger

Mads Pedersen, Henrik Klitgaard Lauritzen, Jens Christian Frisvad, Anne Boye Strunge Meyer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Twenty Aspergillus strains were evaluated for production of extracellular cellulolytic and xylanolytic activities. Aspergillus brasiliensis, A. niger and A. japonicus produced the highest xylanase activities with the A. brasiliensis and A. niger strains producing thermostable beta-xylosidases. The beta-xylosidase activities of the A. brasiliensis and A. niger strains had similar temperature and pH optima at 75 degrees C and pH 5 and retained 62% and 99%, respectively, of these activities over 1 h at 60 degrees C. At 75 degrees C, these values were 38 and 44%, respectively. Whereas A. niger is a well known enzyme producer, this is the first report of xylanase and thermostable beta-xylosidase production from the newly identified, non-ochratoxin-producing species A. brasiliensis.
Original languageEnglish
JournalBiotechnology Letters
Volume29
Issue number5
Pages (from-to)743-748
ISSN0141-5492
DOIs
Publication statusPublished - 2007

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