Effect of Sugars on the Real-Time Adsorption of Expansin on Cellulose.

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ID: 94020
2020
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Abstract
Biological pretreatment is a safe and environmentally friendly method for disrupting recalcitrant lignocellulose structures. Expansin and expansin-like proteins are used to open up the cellulose structure and display significant synergism when mixed with cellulases that catalyze the breakdown of (hemi)cellulose into sugars. However, the adsorption behavior of expansin in the presence of sugar products is yet unknown. In this work, we monitored the effects of various sugars on the real-time adsorption of expansin (EXLX1) onto cellulose films using a quartz crystal microbalance with dissipation. Cellobiose and xylose at low concentrations enhanced EXLX1 adsorption, whereas they disrupted adsorption at higher concentrations. Arabinose and mannose continuously inhibited expansin adsorption with increasing concentration. No obvious influence of glucose and galactose on EXLX1 adsorption was found. Contact angle measurements and atomic force microscopy of cellulose upon EXLX1 adsorption in the presence of sugars showed that both hydrophilicity and roughness increased with EXLX1 treatment. These results give us the ability to modulate and control expansin adsorption and provide insights into effective expansin use during enzymatic hydrolysis of lignocellulose in biorefineries.
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zhang2020effectbiomacromolecules Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhang, Peiqian;Ma, Yuanyuan;Cui, Mei;Wang, Jieying;Huang, Renliang;Su, Rongxin;Qi, Wei;He, Zhimin;Thielemans, Wim;
Journal Biomacromolecules
Year 2020
DOI
10.1021/acs.biomac.9b01694
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Keywords
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