Carbohydrate-binding modules facilitate the enzymatic hydrolysis of lignocellulosic biomass: Releasing reducing sugars and dissociative lignin available for producing biofuels and chemicals

文献类型： 外文期刊

第一作者： Shi, Qicheng

作者： Shi, Qicheng;Sun, Zhanying;Cheng, Yanfen;Zhu, Weiyun;Abdel-Hamid, Ahmed M.;Cann, Isaac;Tu, Tao;Yao, Bin;Cann, Isaac;Cann, Isaac;Cann, Isaac;Cann, Isaac

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关键词： Carbohydrate -binding modules; CBM-substrate interaction; CBM-fused enzymes; Enzymatic pretreatment; Lignocellulosic biomass

期刊名称：BIOTECHNOLOGY ADVANCES （ 影响因子：16.0； 五年影响因子：16.8 ）

ISSN： 0734-9750

年卷期： 2023 年 65 卷

页码：

收录情况： SCI

摘要： The microbial decomposition and utilization of lignocellulosic biomass present in the plant tissues are driven by a series of carbohydrate active enzymes (CAZymes) acting in concert. As the non-catalytic domains widely found in the modular CAZymes, carbohydrate-binding modules (CBMs) are intimately associated with catalytic domains (CDs) that effect the diverse hydrolytic reactions. The CBMs function as auxiliary components for the recognition, adhesion, and depolymerization of the complex substrate mediated by the associated CDs. Therefore, CBMs are deemed as significant biotools available for enzyme engineering, especially to facilitate the enzymatic hydrolysis of dense and insoluble plant tissues to acquire more fermentable sugars. This review aims at presenting the taxonomies and biological properties of the CBMs currently curated in the CAZy database. The molecular mechanisms that CBMs use in assisting the enzymatic hydrolysis of plant polysaccharides and the regulatory factors of CBM-substrate interactions are outlined in detail. In addition, guidelines for the rational designs of CBM-fused CAZymes are proposed. Furthermore, the potential to harness CBMs for industrial applications, especially in enzymatic pretreatment of the recalcitrant lignocellulose, is evaluated. It is envisaged that the ideas outlined herein will aid in the engineering and production of novel CBM-fused enzymes to facilitate efficient degradation of lignocellulosic biomass to easily fermentable sugars for production of value-added products, including biofuels.

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