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Nonionic Surfactants Enhanced Enzymatic Hydrolysis of Cellulose by Reducing Cellulase Deactivation Caused by Shear Force and Air-Liquid Interface

Nonionic Surfactants Enhanced Enzymatic Hydrolysis of Cellulose by Reducing Cellulase Deactivation Caused by Shear Force and Air-Liquid Interface

Hongming Lou, Meijun Zeng, Qiaoyan Hu, Cheng Cai, Xuliang Lin, Xueqing Qiu, Dongjie Yang, Yuxia Pang

Bioresour Technol. 2018 Feb;249:1-8.

PMID: 29035726

Abstract:

Effects of nonionic surfactants on enzymatic hydrolysis of Avicel at different agitation rates and solid loadings and the mechanism were studied. Nonionic surfactants couldn't improve the enzymatic hydrolysis efficiency at 0 and 100rpm but could enhance the enzymatic hydrolysis significantly at high agitation rate (200 and 250rpm). Cellulase was easily deactivated at high agitation rate and the addition of nonionic surfactants can protect against the shear-induced deactivation, especially when the cellulase concentration was low. When 25mg protein/L of cellulase solution was incubated at 200rpm for 72h, the enzyme activity increased from 36.0% to 89.5% by adding PEG4600. Moreover nonionic surfactants can compete with enzyme in air-liquid interface and reduce the amount of enzyme exposed in the air-liquid interface. The mechanism was proposed that nonionic surfactants could enhance the enzymatic hydrolysis of Avicel by reducing the cellulase deactivation caused by shear force and air-liquid interface.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121315	Nonionic Surfactants			Price

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