Effect of temperature on lignin-derived inhibition studied with three structurally different cellobiohydrolases

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Jenni Liisa Rahikainen
  • Ulla Moilanen
  • Susanna Nurmi-Rantala
  • Angelos Lappas
  • Anu Koivula
  • Liisa Viikari
  • Kristiina Kruus

Research units

  • VTT Technical Research Centre of Finland
  • Center For Research And Technology - Hellas
  • University of Helsinki

Abstract

Non-productive enzyme adsorption onto lignin inhibits enzymatic hydrolysis of lignocellulosic biomass. Three cellobiohydrolases, Trichoderma reesei Cel7A (TrCel7A) and two engineered fusion enzymes, with distinctive modular structures and temperature stabilities were employed to study the effect of temperature on inhibition arising from non-productive cellulase adsorption. The fusion enzymes, TeCel7A-CBM1 and TeCel7A-CBM3, were composed of a thermostable Talaromyces emersonii Cel7A (TeCel7A) catalytic domain fused to a carbohydrate-binding module (CBM) either from family 1 or from family 3. With all studied enzymes, increase in temperature was found to increase the inhibitory effect of supplemented lignin in the enzymatic hydrolysis of microcrystalline cellulose. However, for the different enzymes, lignin-derived inhibition emerged at different temperatures. Low binding onto lignin and thermostable structure were characteristic for the most lignin-tolerant enzyme, TeCel7A-CBM1, whereas TrCel7A was most susceptible to lignin especially at elevated temperature (55. °C).

Details

Original languageEnglish
Pages (from-to)118-125
Number of pages8
JournalBioresource Technology
Volume146
Publication statusPublished - 1 Jan 2013
MoE publication typeA1 Journal article-refereed

    Research areas

  • Adsorption, Cellulase, Enzymatic hydrolysis, Enzyme stability, Lignin

ID: 32868981