多酶系统,以有效的生物氨基化林衍生瓦尼林成瓦尼利胺:酶结构洞察力和酸盐去除策略,以提高生物催化性能
1School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China.
International journal of biological macromolecules
|July 1, 2025
概括
使用酸盐脱碳酶 (PDC) 和 ω-转氨酶的新型多酶系统有效地将生物质分子转化为有价值的氨基. 这种可持续的生物催化方法最大限度地减少了浪费,并提高了生物基产品的生产率.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 绿色化学 绿色化学
- 生物技术是生物技术.
背景情况:
- 越来越多的兴趣在温和条件下使用 ω-转氨酶从生物质衍生分子合成氨基.
- 生物胺化的挑战包括酸盐的积累和高氨基供体消耗.
研究的目的:
- 开发一种多酶系统,以有效地生物质基分子的生物胺化.
- 提高氨基生产的催化效率和可持续性.
- 阐明 ω-转氨酶-基质相互作用的结构基础.
主要方法:
- 在大肠杆菌中,pyruvate脱碳酶 (PDC) 和 ω-转氨酶HNILQE的同时表达,以创建一个pyruvate去除系统.
- 进行X射线晶体学以确定 ω-转氨酶突变HNILQE的结构.
- 分子对接分析,以调查基质结合相互作用.
- 该系统应用于香草,,和5-基甲基.
主要成果:
- 多酶酸盐去除系统有效地缓解了酸盐的积累,并减少了氨酸供体消耗.
- HNILQE的晶体结构揭示了关键的氨基酸残留物 (ARG128,VAL127,TRP184,HIS55),这些残留物对素结合至关重要.
- 实现了0.54g瓦尼利胺每克瓦尼林的生产率.
- 证明了高的催化效率和最小化了furfural和5-hydroxymethylfurfural的副产品的形成.
结论:
- 开发的多酶策略显著提高了生物催化氨化效率和可持续性.
- 这种环保方法为升级生物质衍生平台分子成为高价值氨基提供了一条有价值的途径.
- 这些发现为从可再生资源中实现可持续化学合成提供了有希望的方法.
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