由CYP-cl3催化的DHEA的两步有序选择性氧化修改策略
Qingbo Deng1, Peng He2, Zhen-Ming Lu1
1School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China.
研究人员设计了一个P450二基酶,以高效地合成类固醇. 一个四重突变实现了99.9%的7α,15α-diOH-DHEA产量,改善了类固醇药物前体的生产.
科学领域:
- 生物催化剂是一种生物催化剂.
- 酵素工程是什么? 酶工程是什么
- 药用化学 医学化学
背景情况:
- 细胞染色体P450 (P450) 酶对于通过氧化合成的类固醇药物合成至关重要.
- 现有的P450二基酶具有较差的催化性能和不平衡的两步基化,阻碍了二基化类固醇的高效合成.
研究的目的:
- 为了阐明DHEA (脱水氨) 到7α,15α-diOH-DHEA的氧化序列,由CYP-cl3.3.催化.
- 为了设计一种高度选择性和高效的P450二基酶用于类固醇合成.
主要方法:
- 计算分析以确定基化序列 (C7,然后C15).
- 一个三个步骤的酶修改策略:高通量选,半理性设计和突变位点组合.
- 分子对接和动力学模拟以了解改善催化性能的机制.
主要成果:
- 通过CYP-cl3确定DHEA的氧化序列为C7α,其次是C15α.
- 一个四重突变 (A83P/E264I/V281A/T315P) 的成功工程.
- 工程突变者实现了99.9%的所需7α,15α-diOH-DHEA产物的比例.
结论:
- 该研究成功地提高了P450二氧化酶在类固醇合成中的催化性能和选择性.
- 该工程酶提供了一条有效的途径,以关键的类固醇药物前体.
- 这些发现为改进其他P450基酶提供了指导.
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
09:45Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
E2 Reaction: Kinetics and Mechanism
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...
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
