一个工程双功能的L-DOPA脱碳酶使得最小化的氧铁醇级联能够实现
Shiming Tang1, Zhilin Ouyang1, Ying Huo1
1Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China.
International journal of biological macromolecules
|November 30, 2024
概括
研究人员设计了酶,以高效地合成氧醇. 一种双重功能酶和稳定降解酶使得一个简化的级联过程成为可能,从L-DOPA中获得高产量和转化率.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 代谢工程是代谢工程.
- 绿色化学是一种绿色化学.
背景情况:
- 氧醇是一种有益于人类健康的化合物,具有复杂的生物合成途径.
- 现有的氧铁醇合成方法需要多个酶,并面临酶稳定性的挑战.
- 将L-DOPA转化为3,4-DHPAA通常需要除碳酶和氧化除氨酶活动.
研究的目的:
- 从L-DOPA开发一种简化和高效的生物催化级联,用于从L-DOPA中合成氧化.
- 为了设计一种具有脱碳酶和氧化脱氨酶活性的双重功能酶.
- 为了提高乙降解酶的热稳定性,以提高工艺可行性.
主要方法:
- 从Pseudomonas putida (PpDODC) 获得的工程L-DOPA脱碳酶,通过重塑策略实现双重功能活动.
- 利用理性设计来创建来自Solanum lycopersicum (SlPAR-M4) 的乙降解酶的热稳定突变体.
- 建立了一个两种酶级联系统,使用工程PpDODC和SlPAR-M4突变来进行L-DOPA转化.
主要成果:
- 开发了一种具有双重功能的PpDODC突变 (PpDODC/Y79F/Y324F),其活性增加了256.8倍.
- 创建了一个稳定的SlPAR突变 (SlPAR-M4),在40°C下在12小时后保持活性.
- 在5个小时的反应中,L-DOPA的分子转化率达到了98.2%,产生了31.4mM.
结论:
- 成功建立了一种新的,简化的生物催化级联,用于氧 Tyrosol 合成.
- 工程酶为高效和稳定的氧醇生产提供了一个有前途的解决方案.
- 开发的突变物有可能在类似化合物的生物转化中广泛应用.
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