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塔加4-Epimerase的蛋白质工程用于D-塔加的生产

Yuxin Wang^1,2, Zijian Tan^2,3, Hongli Wei^2,4

¹Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027, China.

Journal of agricultural and food chemistry

|May 12, 2025

概括

研究人员从Thermotogae中设计了一种tagatose 4-epimerase酶 (TsT4Ease),将其D-果糖转化为D-tagatose的转化效率提高了2.8倍. 这种增强的酶可以有效地生产D-塔加,用于作为糖替代品.

科学领域:

酶工程是什么?酶工程是什么?
生物催化剂是一种生物催化剂.
碳水化合物的化学成分

背景情况:

D-TAGATOSE是一种有价值的糖替代品,具有重要的商业潜力.
酶性转化D-果糖到D-塔加需要高效的塔加-4-epimerase酶.
优化酶效率对于可扩展的D-塔加生产至关重要.

研究的目的:

从Thermotogae (TsT4Ease) 来设计一个高效的塔加-4-酶.
为了增强 TsT4Ease 的催化活性,用于将 D-果糖转化为 D-泰加.
阐明改善酶功能的结构基础.

主要方法:

半理性设计和定向进化被用来设计 TsT4Ease.
测量了酶活性,以量化与野生类型 (WT) 相比的改善.
结晶结构分析和分子动力学 (MD) 模拟用于研究酶结构和功能.

主要成果:

与WT相比,工程TsT4Ease的催化活性增加了2.8倍.
优化的酶促进了D-塔加的产生,在2小时内达到42g/L.
结构分析显示了 (α/β) 8-TIM桶折叠和Zn2+结合活性位点,模拟显示了增强的基质结合和活性口袋稳定.

结论:

经过工程设计的 TsT4Ease 显著提高了 D-塔加生产的效率.
结构和模拟数据为酶的结构功能关系提供了洞察力.
这项研究为工业D-塔加合成提供了一个有前途的候选酶.

关键词:

这就是D-果糖.D - 塔加托糖 D - 塔加托糖指导进化是指导进化的.结构 - 功能关系关系.塔加-4-表皮酶的使用

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