可扩展和立体选择性C-H键氧化类固醇使用设计者血红酸过氧酶生物催化剂
Oghenesivwe Osiebe1, Eva F Hayball1, Nikita Yevstigneyev1
1Department of Chemistry, Adelaide University, Adelaide, SA 5005, Australia.
The Journal of organic chemistry
|January 7, 2026
概括
设计的细胞P450酶使选择性类固醇氧化成为可能. 这种生物催化方法可以有效地产生16α-基化类固醇,促进化学合成.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 有机化学和类固醇合成.
- 生物技术和制药发展
背景情况:
- 选择性激活未激活的碳键在化学合成中至关重要.
- 细胞染色体P450酶是多用途的催化剂,但通常需要专门的工程转换.
- 类固醇氧化对于生产生物活性代谢物和药物前体很重要.
研究的目的:
- 设计一种细菌细胞染色体P450酶,用于区域选择性和立体选择性类固醇氧化.
- 开发一种生物催化方法,用于生产16α-氧化类固醇代谢产物.
- 描述工程酶的活性,稳定性和基质范围.
主要方法:
- 从*Nocardia otitidiscaviarum*中设计CYP154C35,通过修改I螺旋氧结合槽中的氨基酸残留物.
- 将酶转化为过氧酶 (CYP154C35QE),通过改变酸-酒精对转化为谷氨酸和谷氨酸酸盐残留物.
- 使用工程酶的生物催化氧化各种类固醇 (孕激素,丸激素,激素,安德罗斯坦,DHEA).
主要成果:
- 设计的CYP154C35QE酶有效地催化了16α位置的类固醇的立体选择性氧化.
- 该酶在过氧化的存在下表现出稳定性,耐受20%的DMSO,并在40°C预热1小时后保持活性.
- 实现了高周转率 (约6500),从而完成了基质转换,并使120毫克尺度的16α-基化类固醇能够生产.
结论:
- 工程化过氧酶CYP154C35QE是一种强大的,高效的生物催化剂,用于选择性类固醇氧化.
- 这种方法为合成有价值的16α-基化类固醇代谢产物提供了可扩展的途径.
- 这项研究强调了酶工程在创建用于复杂化学转换的新生物催化剂方面的潜力.
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