一种热稳定的血红蛋白折叠,适用于使用过氧酶活性进行立体选择性C-H键氧化
Tuhin Das1, Eva F Hayball1, Alix C Harlington2
1Department of Chemistry, University of Adelaide, Adelaide, SA, 5005, Australia.
Chembiochem : a European journal of chemical biology
|September 13, 2024
概括
来自极端动物的工程化热稳定性P450酶 (CYPs) 为生物催化提供了增强的稳定性. 经过修改的CYP107PQ1QE酶使用过氧化有效地将β-离子子转化为 (S) -4-氧-β-离子.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 蛋白质工程是指蛋白质的工程.
- 有机化学 有机化学
背景情况:
- 热稳定酶对于工业生物催化剂至关重要,可以克服温度限制.
- 细胞染色体P450酶 (CYPs) 是多功能单氧化酶,以选择性氧化反应而闻名.
- 极端源蛋白质支架为酶设计提供了增强的稳定性.
研究的目的:
- 从热友性细胞染色体P450酶中设计出一种高度稳定和酶选择性过氧酶.
- 为了利用来自Meiothermus ruber的CYP酶支架用于生物催化剂开发.
- 为了使立体选择性C-H键激活使用过氧化作为氧化剂.
主要方法:
- 在CYP107PQ1中修改I螺旋,以创建一个过氧酶变体 (CYP107PQ1QE).
- 酶性氧化β-离子子到 (S) -4-氧-β-离子子.
- 在热应力,有机溶剂和过氧化下对酶稳定性的评估.
- 扩大反应的规模,以对产品进行表征.
主要成果:
- 设计的CYP107PQ1QE实现了 (S) -4-氧-β-离子子生产的94%的反体过剩.
- 该酶表现出高稳定性,耐受20mM H2O2,20%的有机溶剂和显著的热应力 (60°C 1小时).
- 支持超过1700个机,在30°C长期储存365天后,功能持续.
结论:
- 从极端动物获取蛋白质折叠是设计强大的生物催化剂的可行策略.
- 工程化过氧酶提供了一种稳定和选择性的方法,用于使用H2O2.2.的C-H键激活.
- 这项工作为开发用于化学合成的先进酶催化剂提供了一个有希望的平台.
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