通过真菌过氧酶合成19-基亚拉基酸:一个实验和计算研究
Alejandro González-Benjumea1, Mireia Martínez-Sugrañes2,3, Miguel Alcalde4
1Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), CSIC, Reina Mercedes 10, E-41012, Sevilla, Spain.
ChemSusChem
|June 2, 2025
概括
称为非特异性过氧酶 (UPO) 的工程酶现在可以选择性地化阿拉基酸. 一个特定的变体,A77L,显示出高的反抗选择性,用于生产有价值的 (S) - 19 - 基酸.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 药用化学 医学化学
- 分子生物学分子生物学
背景情况:
- 氧化阿拉基酸衍生物在生理和炎症过程中至关重要.
- (R) - 和 (S) - 反体的独特生物活性强调了它们的药物重要性.
- 酶化提供了一条选择性生产这些有价值化合物的途径.
研究的目的:
- 设计复合非特异性过氧酶 (UPO) 用于亚酸的区域和选择性氧化.
- 调查工程UPO变体中增强选择性的结构基础.
- 评估UPO作为合成药理学相关氧脂肪酸的生物催化剂.
主要方法:
- 从Coprinopsis cinerea (rCciUPO) 和Agrocybe aegerita (rAaeUPO) 中使用的重组UPO,包括工程变种 (A77L,A77T,A77N).
- 在阿拉基酸上进行了区域和酶选择性化试验.
- 采用分子动力学模拟来阐明酶基质相互作用和选择性机制.
- 对其他生物活性脂肪酸进行实验分析.
主要成果:
- 野生类型的UPO产生了 ω-1 和 ω-2 基衍生物,有一些过氧化.
- 改造的rAaeUPO变种显示出对 ω-1 氧化和减少过氧化的改善区域选择性.
- 该A77L变体实现了高的反抗选择性 (92% (S) - 19-基亚拉基酸的反抗体).
- 分子动力学揭示了A77L中的活性部位通道缩小施加约束,增强选择性并防止过氧化.
- 关键残留物 (T242,E245,D70) 被确定为通过碳酸盐相互作用调节酶选择性至关重要.
- UPOs证明了其他C18-C22脂肪酸的高效化.
结论:
- 工程UPO,特别是A77L变种,是选择性基酸基化有效的生物催化剂.
- 在UPOs的结构性修改可以合理控制区域和enantioselectivity.
- 该A77L变体为药理学上相关的氧脂肪酸的向合成提供了一个有前途的工具.
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