Trichoderma longibrachiatum acetyl xylan esterase 1 enhances hemicellulolytic preparations to degrade corn silage polysaccharides

K.G. Neumüller, H. Streekstra, H. Gruppen, H.A. Schols

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

Supplementation of a Trichoderma longibrachiatum preparation to an industrial Aspergillus niger/Talaromyces emersonii enzyme mixture demonstrated synergy for the saccharification of corn silage water-unextractable solids (WUS). Sub-fractions of the crude T. longibrachiatum preparation obtained after chromatography were analyzed regarding their hydrolytic activity. An acetyl xylan esterase 1 [Axe1, carbohydrate esterase (CE) family 5]-enriched sub-fraction closely mimicked the hydrolytic gain as obtained by supplementation of the complete, crude enzyme mixture (increase of 50%, 62% and 29% for Xyl, Ara and Glc, respectively). The acetic acid released from model polysaccharides (WUS) and oligosaccharides [neutral (AcXOS) and acidic (AcUXOS) xylo-oligosaccharides] by Axe1 was two and up to six times higher compared to the acetic acid released by acetyl xylan esterase A (AxeA, CE 1). Characterization of Axe1 treated AcXOS and AcUXOS revealed deacetylation of oligosaccharides that were not deacetylated by AxeA or the A. niger/T. emersonii preparation.
Original languageEnglish
Pages (from-to)64-73
JournalBioresource Technology
Volume163
DOIs
Publication statusPublished - 2014

Keywords

  • lignocellulosic biomass
  • enzyme
  • reesei
  • bioconversion
  • fermentation
  • perspectives
  • resistant
  • mode

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