在酶性C-H键氧化过程中指导群控制的区域选择性
Solymar Negretti1, Alison R H Narayan, Karoline C Chiou
1Department of Medicinal Chemistry, §Life Sciences Institute, ⊥Department of Chemistry, and ∥Department of Microbiology & Immunology, University of Michigan , Ann Arbor, Michigan 48109, United States.
酶基化区域选择性可以通过基质工程来调节. 将天然基替换为合成基会改变P450单氧酶PikCD50N-RhFRED的作用.
科学领域:
- 生物催化剂是一种生物催化剂.
- 有机化学 有机化学
- 酶学 是一种酶学.
背景情况:
- 细胞染色体P450单氧化酶 (P450s) 是自然产品生物合成和药物代谢的关键酶.
- P450 PikCD50N-RhFRED酶利用其天然基质YC-17上的脱胺糖部分,通过定机制进行区域选择性氧化.
- 了解和控制P450区域选择性对于合成化学和药物开发至关重要.
研究的目的:
- 通过PikCD50N-RhFRED研究脱索胺基在指导区域选择性基化中的作用.
- 探索基质工程作为一种调节酶C-H功能化的区域选择性的方法.
- 开发可以轻松引入和从基板上移除的合成固组.
主要方法:
- 基质工程:用各种合成的N,N-二甲基胺基替换YC-17的天然脱胺部分.
- 酶分析:使用PikCD50N-RhFRED确定工程YC-17类似物化总周转数和区域选择性.
- 结构和生物化学分析:将基组的特性 (大小,立体化学,刚性) 与基化结果相关联.
主要成果:
- 合成固组实现了与天然索胺相比或超过的酶周转率.
- 自然的德索山胺组产生了1:1的基化区域异构体混合物 (C-10/C-12).
- 合成显著改变了区域选择性,将C-10/C-12基化比率从20:1 (自然) 转移到1:4的工程基板.
结论:
- 基组的大小,立体化学和刚性极大地影响了P450介导基化过程的区域选择性.
- 基板工程为蛋白质工程提供了一种有效的替代方案,用于微调生物催化剂中的区域选择性C-H功能化.
- 这种方法为控制天然产品支架的酶化提供了一种多功能策略.
更多相关视频
06:34Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
Published on: June 20, 2014
08:25Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
相关概念视频
Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
Regioselective Formation of Enolates
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
Regioselectivity of Electrophilic Additions-Peroxide Effect
