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Lin RD, Xing X, Yu Y, Li WD, Chang DD, Tao FY, Wang N. Theoretical Analysis of Selectivity Differences in Ketoreductases toward Aldehyde and Ketone Carbonyl Groups. J Chem Inf Model 2024; 64:3400-3410. [PMID: 38537611 DOI: 10.1021/acs.jcim.3c01996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Lactobacillus kefir alcohol dehydrogenase (LkADH) and ketoreductase from Chryseobacterium sp. CA49 (ChKRED12) exhibit different chemoselectivity and stereoselectivity toward a substrate with both keto and aldehyde carbonyl groups. LkADH selectively reduces the keto carbonyl group while retaining the aldehyde carbonyl group, producing optically pure R-alcohols. In contrast, ChKRED12 selectively reduces the aldehyde group and exhibits low reactivity toward ketone carbonyls. This study investigated the structural basis for these differences and the role of specific residues in the active site. Molecular dynamics (MD) simulations and quantum chemical calculations were used to investigate the interactions between the substrate and the enzymes and the essential cause of this phenomenon. The present study has revealed that LkADH and ChKRED12 exhibit significant differences in the structure of their respective active pockets, which is a crucial determinant of their distinct chemoselectivity toward the same substrate. Moreover, residues N89, N113, and E144 within LkADH as well as Q151 and D190 within ChKRED12 have been identified as key contributors to substrate stabilization within the active pocket through electrostatic interactions and van der Waals forces, followed by hydride transfer utilizing the coenzyme NADPH. Furthermore, the enantioselectivity mechanism of LkADH has been elucidated using quantum chemical methods. Overall, these findings not only provide fundamental insights into the underlying reasons for the observed differences in selectivity but also offer a detailed mechanistic understanding of the catalytic reaction.
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Affiliation(s)
- Ru-De Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiu Xing
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yuan Yu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Wen-Dian Li
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China
- Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
| | - Dan-Dan Chang
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China
- Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
| | - Fei-Yan Tao
- Harmful Components and Tar Reduction in Cigarette Key Laboratory of Sichuan Province, China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China
- Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
| | - Na Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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Ketoreductase-assisted synthesis of chiral selective tert-butyl{5-[(4-cyanophenyl)(hydroxy)methyl]-2-fluorophenyl}carbamate: process minutiae, optimization and characterization. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02698-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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