蛋白质工程在饲料用酶研发中的应用研究进展  

Progress in the application of protein engineering in the developing of feed enzymes

作　　者：涂涛 罗会颖 姚斌 TU Tao;LUO Huiying;YAO Bin(State Key Laboratory of Animal Nutrition,Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193,China)

机构地区：[1]动物营养学国家重点实验室,中国农业科学院北京畜牧兽医研究所,北京100193

出　　处：《合成生物学》2022年第3期487-499,共13页Synthetic Biology Journal

基　　金：国家重点研发计划青年科学家项目(2021YFC2102400);国家现代农业产业技术体系(CARS-41)。

摘　　要：饲料用酶制剂作为饲料添加剂领域最为热门的研究热点之一,以其无残留、无污染、无耐药性等强势优势被广泛推广和应用,极大促进了饲料行业的健康发展。其中,饲料用酶的催化性能是决定其应用功效的核心因素,如何提高饲料用酶的综合性能是饲料用酶制剂研发过程中面临的关键科学问题之一。本文从饲料用酶的实际应用需求出发,聚焦饲料用酶的热稳定性、pH依赖性、蛋白酶抗性和催化活性等4个方面,综述了计算机辅助的蛋白质理性设计技术在饲料用酶制剂研发中的应用研究进展,介绍了用于提升饲料用酶催化性能的有效分子设计策略。通过蛋白质工程技术在关键饲料用酶制剂研发中的应用案例介绍,展示了基于结构基础的酶分子设计技术在饲料用酶制剂研发中的应用前景。与此同时,作为一种应用导向极强的饲料添加剂,利用合成生物学的思想从酶蛋白全局角度出发综合提升饲料用酶催化性能的发展方向,将推动饲料用酶制剂环境适应性分子设计的研发迈向新的台阶。Feed enzymes are one of the hotspots for research in the field of feed additives.Because of their superior qualities of no residue,no pollution,and no drug resistance,feed enzymes have been widely promoted and applied in the feed industry.As functional additives,feed enzymes have tremendously fostered feed development.Since the catalytic performance of feed enzyme is the core factor in determining their application effectiveness,one of the primary challenges faced by scientists engaged in the R&D of feed enzymes is how to improve their overall performance.Based on the application requirement for feed enzymes,this review focuses on their thermal stability,pH dependence,protease resistance,and catalytic activities.We summarize the application of computer-aided protein rational design technology in the R&D of feed enzymes,and introduce effective molecular design strategies for improving their catalytic performance.In addition,we present the progress in improving the performance of key feed enzymes by protein engineering technology,demonstrating the application prospect of enzyme molecular design technology based on the knowledge of protein structures.We also prospect the future development of protein engineering technology in feed enzymes,including(1)application-oriented designs for feed enzymes,(2)molecular design of multifunctional enzymes for efficient utilization of feed materials,(3)improvement of the thermostability as well as the catalytic performance of feed enzymes to meet the requirement of feed pelleting and under digestive and intestinal conditions,and(4)innovation and development of enzyme molecular design technology.Improving the catalytic performance of feed enzymes comprehensively from the perspective of enzyme proteins using synthetic biology tools will promote the development of the environmental adaptive molecular design of feed enzymes to a new stage.

关 键 词：饲料用酶 蛋白质工程 分子设计 热稳定性 pH依赖性 蛋白酶抗性 催化活性 

分 类 号：Q816[生物学—生物工程]