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Effect of phenolic compounds from pretreated sugarcane bagasse on cellulolytic and hemicellulolytic activities

Author:
Michelin, Michele, Ximenes, Eduardo, de Lourdes Teixeira de Moraes Polizeli, Maria, Ladisch, Michael R.
Source:
Bioresource technology 2016 v.199 pp. 275-278
ISSN:
0960-8524
Subject:
acetone, beta-glucosidase, cellulose, endo-1,4-beta-glucanase, filtrates, hemicellulose, hydrolysis, phenolic compounds, sugarcane bagasse, temperature, xylan 1,4-beta-xylosidase
Abstract:
This work shows both cellulases and hemicellulases are inhibited and deactivated by water-soluble and acetone extracted phenolics from sugarcane bagasse pretreated at 10% (w/v) for 30min in liquid hot water at 180 or 200°C. The dissolved phenolics in vacuum filtrate increased from 1.4 to 2.4g/L as temperature increased from 180 to 200°C. The suppression of cellulose and hemicellulose hydrolysis by phenolics is dominated by deactivation of the β-glucosidase or β-xylosidase components of cellulase and hemicellulase enzyme by acetone extract at 0.2–0.65mgphenolics/mg enzyme protein and deactivation of cellulases and hemicellulases by the water soluble components in vacuum filtrate at 0.05–2mg/mg. Inhibition was a function of the type of enzyme and the manner in which the phenolics were extracted from the bagasse.
Agid:
5266672