1
|
Bhoite A, Gaur NK, Palange M, Kontham R, Gupta V, Kulkarni K. Structure of epoxide hydrolase 2 from Mangifera indica throws light on the substrate specificity determinants of plant epoxide hydrolases. Biochem Biophys Res Commun 2024; 733:150444. [PMID: 39067247 DOI: 10.1016/j.bbrc.2024.150444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 07/11/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024]
Abstract
Epoxide hydrolases (EHs) are a group of ubiquitous enzymes that catalyze hydrolysis of chemically reactive epoxides to yield corresponding dihydrodiols. Despite extensive studies on EHs from different clades, generic rules governing their substrate specificity determinants have remained elusive. Here, we present structural, biochemical and molecular dynamics simulation studies on MiEH2, a plant epoxide hydrolase from Mangifera indica. Comparative structure-function analysis of nine homologs of MiEH2, which include a few AlphaFold structural models, show that the two conserved tyrosines (MiEH2Y152 and MiEH2Y232) from the lid domain dissect substrate binding tunnel into two halves, forming substrate-binding-pocket one (BP1) and two (BP2). This compartmentalization offers diverse binding modes to their substrates, as exemplified by the binding of smaller aromatic substrates, such as styrene oxide (SO). Docking and molecular dynamics simulations reveal that the linear epoxy fatty acid substrates predominantly occupy BP1, while the aromatic substrates can bind to either BP1 or BP2. Furthermore, SO preferentially binds to BP2, by stacking against catalytically important histidine (MiEH2H297) with the conserved lid tyrosines engaging its epoxide oxygen. Residue (MiEH2L263) next to the catalytic aspartate (MiEH2D262) modulates substrate binding modes. Thus, the divergent binding modes correlate with the differential affinities of the EHs for their substrates. Furthermore, long-range dynamical coupling between the lid and core domains critically influences substrate enantioselectivity in plant EHs.
Collapse
Affiliation(s)
- Ashwini Bhoite
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Neeraj K Gaur
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Megha Palange
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Ravindar Kontham
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Vidya Gupta
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Kiran Kulkarni
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune- 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India.
| |
Collapse
|
2
|
Yi J, Goh NJJ, Li Z. Green and Enantioselective Synthesis via Cascade Biotransformations: From Simple Racemic Substrates to High-Value Chiral Chemicals. Chem Asian J 2024; 19:e202400565. [PMID: 38954385 DOI: 10.1002/asia.202400565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/30/2024] [Accepted: 07/02/2024] [Indexed: 07/04/2024]
Abstract
Asymmetric synthesis of chiral chemicals in high enantiomeric excess (ee) is pivotal to the pharmaceutical industry, but classic chemistry usually requires multi-step reactions, harsh conditions, and expensive chiral ligands, and sometimes suffers from unsatisfactory enantioselectivity. Enzymatic catalysis is a much greener and more enantioselective alternative, and cascade biotransformations with multi-step reactions can be performed in one pot to avoid costly intermediate isolation and minimise waste generation. One of the most attractive applications of enzymatic cascade transformations is to convert easily available simple racemic substrates into valuable functionalised chiral chemicals in high yields and ee. Here, we review the three general strategies to build up such cascade biotransformations, including enantioconvergent reaction, dynamic kinetic resolution, and destruction-and-reinstallation of chirality. Examples of cascade transformations using racemic substrates such as racemic epoxides, alcohols, hydroxy acids, etc. to produce the chiral amino alcohols, hydroxy acids, amines, and amino acids are given. The product concentration, ee, and yield, scalability, and substrate scope of these enzymatic cascades are critically reviewed. To further improve the efficiency and practical applicability of the cascades, enzyme engineering to enhance catalytic activities of the key enzymes using the latest microfluidics-based ultrahigh-throughput screening and artificial intelligence-guided directed evolution could be a useful approach.
Collapse
Affiliation(s)
- Jieran Yi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Nicholas Jun Jie Goh
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Zhi Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| |
Collapse
|
3
|
Park YR, Krishna S, Lee OK, Lee EY. Biosynthesis of chiral diols from alkenes using metabolically engineered type II methanotroph. BIORESOURCE TECHNOLOGY 2023; 389:129851. [PMID: 37813317 DOI: 10.1016/j.biortech.2023.129851] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
Methanotrophs are environmentally friendly microorganisms capable of converting gas to liquid using methane monooxygenases (MMOs). In addition to methane-to-methanol conversion, MMOs catalyze the conversion of alkanes to alcohols and alkenes to epoxides. Herein, the efficacy of epoxidation by type I and II methanotrophs was investigated, and type II methanotrophs were observed to be more efficient in converting alkenes to epoxides. Subsequently, three (Epoxide hydrolase) EHs of different origins were overexpressed in the type II methanotroph Methylosinus trichosporium OB3b to produce 1,2-diols from epoxide. Methylosinus trichosporium OB3b expressing Caulobacter crescentus EH produced the highest amount of (R)-1,2-propanediol (251.5 mg/L) from 1-propene. These results demonstrate the possibility of using methanotrophs as a microbial platform for diol production and the development of a continuous bioreactor for industrial applications.
Collapse
Affiliation(s)
- Ye Rim Park
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Shyam Krishna
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Ok Kyung Lee
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Eun Yeol Lee
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
| |
Collapse
|
4
|
Bučko M, Kaniaková K, Hronská H, Gemeiner P, Rosenberg M. Epoxide Hydrolases: Multipotential Biocatalysts. Int J Mol Sci 2023; 24:7334. [PMID: 37108499 PMCID: PMC10138715 DOI: 10.3390/ijms24087334] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Epoxide hydrolases are attractive and industrially important biocatalysts. They can catalyze the enantioselective hydrolysis of epoxides to the corresponding diols as chiral building blocks for bioactive compounds and drugs. In this review article, we discuss the state of the art and development potential of epoxide hydrolases as biocatalysts based on the most recent approaches and techniques. The review covers new approaches to discover epoxide hydrolases using genome mining and enzyme metagenomics, as well as improving enzyme activity, enantioselectivity, enantioconvergence, and thermostability by directed evolution and a rational design. Further improvements in operational and storage stabilization, reusability, pH stabilization, and thermal stabilization by immobilization techniques are discussed in this study. New possibilities for expanding the synthetic capabilities of epoxide hydrolases by their involvement in non-natural enzyme cascade reactions are described.
Collapse
Affiliation(s)
- Marek Bučko
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia;
| | - Katarína Kaniaková
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia; (K.K.); (H.H.); (M.R.)
| | - Helena Hronská
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia; (K.K.); (H.H.); (M.R.)
| | - Peter Gemeiner
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia;
| | - Michal Rosenberg
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia; (K.K.); (H.H.); (M.R.)
| |
Collapse
|
5
|
Yi J, Wang Z, Li Z. Cascade Biotransformations for Enantioconvergent Conversion of Racemic Styrene Oxides to ( R)-Mandelic Acids. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jieran Yi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Zilong Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Zhi Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| |
Collapse
|
6
|
Söderlund I, Tjärnhage E, Hamnevik E, Widersten M. Facile synthesis of 2-hydroxyacetophenone from racemic styrene oxide catalyzed by engineered enzymes. Biotechnol Lett 2022; 44:985-990. [PMID: 35731351 PMCID: PMC9356933 DOI: 10.1007/s10529-022-03271-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/31/2022] [Indexed: 11/29/2022]
Abstract
We describe a system that allows for biocatalyzed in vivo synthesis of α-hydroxy ketones from racemic epoxide starting material by in vivo co-expression of native and engineered epoxide hydrolase and alcohol dehydrogenases. The constructed expression system exploits the host cell metabolism for supply and regeneration of precious nicotinamide dinucleotide coenzyme. Racemic styrene oxide added to growth medium passively enters the cells and is hydrolyzed into (1R)-phenylethane-1,2-diol, which is subsequently oxidized to the acyloin 2-hydroxyacetophenone. Produced 2-hydroxyacetophenone escapes the cells via passive diffusion into the growth medium. Thus, co-expression of potato epoxide hydrolase and engineered alcohol dehydrogenase variants can be employed for robust and facile production of 2-hydroxyacetophenone from racemic styrene oxide.
Collapse
Affiliation(s)
- Isac Söderlund
- Department of Chemistry - BMC, Uppsala University, Box 576, 751 23, Uppsala, Sweden
| | - Elias Tjärnhage
- Department of Chemistry - BMC, Uppsala University, Box 576, 751 23, Uppsala, Sweden
| | - Emil Hamnevik
- Department of Chemistry - BMC, Uppsala University, Box 576, 751 23, Uppsala, Sweden
| | - Mikael Widersten
- Department of Chemistry - BMC, Uppsala University, Box 576, 751 23, Uppsala, Sweden.
| |
Collapse
|
7
|
Enantioconvergent hydrolysis of racemic epoxides at elevated concentrations in Tween-20/phosphate buffer by the corresponding epoxide hydrolases. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
8
|
Wen Z, Hu BC, Hu D, Liu YY, Zhang D, Zang J, Wu MC. Efficient kinetic resolution of para-chlorostyrene oxide at elevated concentration by Solanum lycopersicum epoxide hydrolase in the presence of Tween-20. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2020.106180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
|
9
|
Zhang C, Li C, Zhu XX, Liu YY, Zhao J, Wu MC. Highly regio- and enantio-selective hydrolysis of two racemic epoxides by GmEH3, a novel epoxide hydrolase from Glycine max. Int J Biol Macromol 2020; 164:2795-2803. [PMID: 32763395 DOI: 10.1016/j.ijbiomac.2020.08.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/28/2020] [Accepted: 08/02/2020] [Indexed: 11/29/2022]
Abstract
A novel epoxide hydrolase from Glycine max, designated GmEH3, was excavated based on the computer-aided analysis. Then, gmeh3, a GmEH3-encoding gene, was cloned and successfully expressed in E. coli Rosetta(DE3). Among the ten investigated rac-epoxides, GmEH3 possessed the highest and best complementary regioselectivities (regioselectivity coefficients, αS = 93.7% and βR = 97.2%) in the asymmetric hydrolysis of rac-m-chlorostyrene oxide (5a), and the highest enantioselectivity (enantiomeric ratio, E = 55.6) towards rac-phenyl glycidyl ether (7a). The catalytic efficiency (kcatS/KmS = 2.50 mM-1 s-1) of purified GmEH3 for (S)-5a was slightly higher than that (kcatR/KmR = 1.52 mM-1 s-1) for (R)-5a, whereas the kcat/Km (5.16 mM-1 s-1) for (S)-7a was much higher than that (0.09 mM-1 s-1) for (R)-7a. Using 200 mg/mL wet cells of E. coli/gmeh3 as the biocatalyst, the scale-up enantioconvergent hydrolysis of 150 mM rac-5a at 25 °C for 1.5 h afforded (R)-5b with 90.2% eep and 95.4% yieldp, while the kinetic resolution of 500 mM rac-7a for 2.5 h retained (R)-7a with over 99% ees and 43.2% yields. Furthermore, the sources of high regiocomplementarity of GmEH3 for (S)- and (R)-5a as well as high enantioselectivity towards rac-7a were analyzed via molecular docking (MD) simulation.
Collapse
Affiliation(s)
- Chen Zhang
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, PR China
| | - Chuang Li
- College of Biological and Chemical Engineering, Auhui Polytechnic University, Wuhu 241000, PR China
| | - Xiu-Xiu Zhu
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, PR China
| | - You-Yi Liu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, PR China
| | - Jun Zhao
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi 214002, PR China.
| | - Min-Chen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, PR China.
| |
Collapse
|
10
|
Li F, Qiu Y, Zheng Y, Chen F, Kong X, Xu J, Yu H. Reprogramming Epoxide Hydrolase to Improve Enantioconvergence in Hydrolysis of Styrene Oxide Scaffolds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fu‐Long Li
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Yan‐Yan Qiu
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Yu‐Cong Zheng
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Fei‐Fei Chen
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Xu–Dong Kong
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Jian‐He Xu
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| | - Hui‐Lei Yu
- State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for Biomanufacturing and Frontiers Science Center for Materiobiology and Dynamic Chemistry East China University of Science and Technology Shanghai 200237 People's Republic of China
| |
Collapse
|
11
|
Sheng X, Kazemi M, Planas F, Himo F. Modeling Enzymatic Enantioselectivity using Quantum Chemical Methodology. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00983] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiang Sheng
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden
| | - Masoud Kazemi
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden
| | - Ferran Planas
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden
| |
Collapse
|
12
|
Hu BC, Hu D, Li C, Xu XF, Wen Z, Wu MC. Near-perfect kinetic resolution of racemic p-chlorostyrene oxide by SlEH1, a novel epoxide hydrolase from Solanum lycopersicum with extremely high enantioselectivity. Int J Biol Macromol 2020; 147:1213-1220. [DOI: 10.1016/j.ijbiomac.2019.10.091] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 01/19/2023]
|
13
|
Hu D, Zong XC, Xue F, Li C, Hu BC, Wu MC. Manipulating regioselectivity of an epoxide hydrolase for single enzymatic synthesis of (R)-1,2-diols from racemic epoxides. Chem Commun (Camb) 2020; 56:2799-2802. [DOI: 10.1039/d0cc00283f] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Both the activity and regioselectivity of Phaseolus vulgaris epoxide hydrolase were remarkably improved via reshaping two substrate tunnels based on rational design.
Collapse
Affiliation(s)
- Die Hu
- Wuxi School of Medicine, Jiangnan University
- Wuxi
- China
| | - Xun-Cheng Zong
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Feng Xue
- School of Marine and Bioengineering
- Yancheng Institute of Technology
- Yancheng 224051
- China
| | - Chuang Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Bo-Chun Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Min-Chen Wu
- Wuxi School of Medicine, Jiangnan University
- Wuxi
- China
| |
Collapse
|
14
|
Zong XC, Li C, Xu YH, Hu D, Hu BC, Zang J, Wu MC. Substantially improving the enantioconvergence of PvEH1, a Phaseolus vulgaris epoxide hydrolase, towards m-chlorostyrene oxide by laboratory evolution. Microb Cell Fact 2019; 18:202. [PMID: 31739786 PMCID: PMC6859628 DOI: 10.1186/s12934-019-1252-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 11/09/2019] [Indexed: 12/01/2022] Open
Abstract
Background Epoxide hydrolase can regioselectively catalyze the oxirane ring-opening hydrolysis of rac-epoxides producing the corresponding chiral diols. In our laboratory, a gene named pveh1 encoding an EH from Phaseolus vulgaris was cloned. Although the directed modification of PvEH1 was carried out, the mutant PvEH1Y3 showed a limited degree of enantioconvergence towards racemic (rac-) m-chlorostyrene oxide (mCSO). Results PvEH1 and PvEH1Y3 were combinatively subjected to laboratory evolution to further enhance the enantioconvergence of PvEH1Y3 towards rac-mCSO. Firstly, the substrate-binding pocket of PvEH1 was identified using a CAVER 3.0 software, and divided into three zones. After all residues in zones 1 and 3 were subjected to leucine scanning, two E. coli transformants, E. coli/pveh1Y149L and /pveh1P184L, were selected, by which rac-mCSO was transformed into (R)-m-chlorophenyl-1,2-ethanediol (mCPED) having 55.1% and 27.2% eep. Secondly, two saturation mutagenesis libraries, E. coli/pveh1Y149X and /pveh1P184X (X: any one of 20 residues) were created at sites Y149 and P184 of PvEH1. Among all transformants, both E. coli/pveh1Y149L (65.8% αS and 55.1% eep) and /pveh1P184W (66.6% αS and 59.8% eep) possessed the highest enantioconvergences. Finally, the combinatorial mutagenesis was conducted by replacements of both Y149L and P184W in PvEH1Y3, constructing E. coli/pveh1Y3Z2, whose αS reached 97.5%, higher than that (75.3%) of E. coli/pveh1Y3. In addition, the enantioconvergent hydrolysis of 20 mM rac-mCSO was performed by E. coli/pveh1Y3Z2, giving (R)-mCPED with 95.2% eep and 97.2% yield. Conclusions In summary, the enantioconvergence of PvEH1Y3Z2 was successfully improved by laboratory evolution, which was based on the study of substrate-binding pocket by leucine scanning. Our present work introduced an effective strategy for the directed modification of enantioconvergence of PvEH1.
Collapse
Affiliation(s)
- Xun-Cheng Zong
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chuang Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Yao-Hui Xu
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, 214002, China
| | - Die Hu
- Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China
| | - Bo-Chun Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Jia Zang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, 214002, China.
| | - Min-Chen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi, 214122, China.
| |
Collapse
|
15
|
Musa MM, Hollmann F, Mutti FG. Synthesis of enantiomerically pure alcohols and amines via biocatalytic deracemisation methods. Catal Sci Technol 2019; 9:5487-5503. [PMID: 33628427 PMCID: PMC7116805 DOI: 10.1039/c9cy01539f] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Deracemisation via chemo-enzymatic or multi-enzymatic approaches is the optimum substitute for kinetic resolution, which suffers from the limitation of a theoretical maximum 50% yield albeit high enantiomeric excess is attainable. This review covers the recent progress in various deracemisation approaches applied to the synthesis of enantiomerically pure alcohols and amines, such as (1) dynamic kinetic resolution, (2) cyclic deracemisation, (3) linear deracemisation (including stereoinversion) and (4) enantioconvergent methods.
Collapse
Affiliation(s)
- Musa M Musa
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZDelft, The Netherlands
| | - Francesco G Mutti
- Van't HoffInstitute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| |
Collapse
|
16
|
Li C, Hu BC, Hu D, Xu XF, Zong XC, Li JP, Wu MC. Stereoselective ring-opening of styrene oxide at elevated concentration by Phaseolus vulgaris epoxide hydrolase, PvEH2, in the organic/aqueous biphasic system. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.01.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
17
|
QM/MM study of the stereospecific proton exchange of glutathiohydroxyacetone by glyoxalase I. RESULTS IN CHEMISTRY 2019. [DOI: 10.1016/j.rechem.2019.100011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
18
|
Li C, Zhao J, Hu D, Hu BC, Wang R, Zang J, Wu MC. Multiple site-directed mutagenesis of a Phaseolus vulgaris epoxide hydrolase to improve its catalytic performance towards p-chlorostyrene oxide based on the computer-aided re-design. Int J Biol Macromol 2019; 121:326-332. [DOI: 10.1016/j.ijbiomac.2018.10.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 08/25/2018] [Accepted: 10/08/2018] [Indexed: 12/16/2022]
|
19
|
Hu BC, Li C, Wang R, Zong XC, Li JP, Li JF, Wu MC. Improvement in the activity and enantioconvergency of PvEH3, an epoxide hydrolase from Phaseolus vulgaris, for p-chlorostyrene oxide by site-saturation mutagenesis. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.08.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
20
|
Martínez-Montero L, Schrittwieser JH, Kroutil W. Regioselective Biocatalytic Transformations Employing Transaminases and Tyrosine Phenol Lyases. Top Catal 2018. [DOI: 10.1007/s11244-018-1054-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
21
|
Li FL, Kong XD, Chen Q, Zheng YC, Xu Q, Chen FF, Fan LQ, Lin GQ, Zhou J, Yu HL, Xu JH. Regioselectivity Engineering of Epoxide Hydrolase: Near-Perfect Enantioconvergence through a Single Site Mutation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02622] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Fu-Long Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Xu-Dong Kong
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
- Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Qi Chen
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Yu-Cong Zheng
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Qin Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fei-Fei Chen
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Li-Qiang Fan
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Guo-Qiang Lin
- Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jiahai Zhou
- Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Hui-Lei Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing Technology, East China University of Science and Technology, Shanghai 200237, China
| |
Collapse
|
22
|
Janfalk Carlsson Å, Bauer P, Dobritzsch D, Kamerlin SCL, Widersten M. Epoxide hydrolysis as a model system for understanding flux through a branched reaction scheme. IUCRJ 2018; 5:269-282. [PMID: 29755743 PMCID: PMC5929373 DOI: 10.1107/s2052252518003573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 03/01/2018] [Indexed: 06/08/2023]
Abstract
The epoxide hydrolase StEH1 catalyzes the hydrolysis of trans-methylstyrene oxide to 1-phenyl-propane-1,2-diol. The (S,S)-epoxide is exclusively transformed into the (1R,2S)-diol, while hydrolysis of the (R,R)-epoxide results in a mixture of product enantiomers. In order to understand the differences in the stereoconfigurations of the products, the reactions were studied kinetically during both the pre-steady-state and steady-state phases. A number of closely related StEH1 variants were analyzed in parallel, and the results were rationalized by structure-activity analysis using the available crystal structures of all tested enzyme variants. Finally, empirical valence-bond simulations were performed in order to provide additional insight into the observed kinetic behaviour and ratios of the diol product enantiomers. These combined data allow us to present a model for the flux through the catalyzed reactions. With the (R,R)-epoxide, ring opening may occur at either C atom and with similar energy barriers for hydrolysis, resulting in a mixture of diol enantiomer products. However, with the (S,S)-epoxide, although either epoxide C atom may react to form the covalent enzyme intermediate, only the pro-(R,S) alkylenzyme is amenable to subsequent hydrolysis. Previously contradictory observations from kinetics experiments as well as product ratios can therefore now be explained for this biocatalytically relevant enzyme.
Collapse
Affiliation(s)
- Åsa Janfalk Carlsson
- Department of Chemistry, BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Paul Bauer
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC Box 596, 751 24 Uppsala, Sweden
| | - Doreen Dobritzsch
- Department of Chemistry, BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Shina C. L. Kamerlin
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC Box 596, 751 24 Uppsala, Sweden
| | - Mikael Widersten
- Department of Chemistry, BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| |
Collapse
|
23
|
Zaugg J, Gumulya Y, Bodén M, Mark AE, Malde AK. Effect of Binding on Enantioselectivity of Epoxide Hydrolase. J Chem Inf Model 2018; 58:630-640. [DOI: 10.1021/acs.jcim.7b00353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Julian Zaugg
- School of Chemistry and Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
| | - Yosephine Gumulya
- School of Chemistry and Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
| | - Mikael Bodén
- School of Chemistry and Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
- Institute for Molecular Bioscience, University of Queensland, 4072 Brisbane, Australia
| | - Alan E. Mark
- School of Chemistry and Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
- Institute for Molecular Bioscience, University of Queensland, 4072 Brisbane, Australia
| | - Alpeshkumar K. Malde
- School of Chemistry and Molecular Biosciences, University of Queensland, 4072 Brisbane, Australia
| |
Collapse
|
24
|
Hamnevik E, Maurer D, Enugala TR, Chu T, Löfgren R, Dobritzsch D, Widersten M. Directed Evolution of Alcohol Dehydrogenase for Improved Stereoselective Redox Transformations of 1-Phenylethane-1,2-diol and Its Corresponding Acyloin. Biochemistry 2018; 57:1059-1062. [DOI: 10.1021/acs.biochem.8b00055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emil Hamnevik
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Dirk Maurer
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Thilak Reddy Enugala
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Thao Chu
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Robin Löfgren
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Doreen Dobritzsch
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Mikael Widersten
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| |
Collapse
|
25
|
Dolcet M, Torres M, Canela-Garayoa R. Raw and waste plant materials as sources of fungi with epoxide hydrolase activity. Application to the kinetic resolution of aryl and alkyl glycidyl ethers. BIOCATAL BIOTRANSFOR 2018. [DOI: 10.1080/10242422.2017.1308496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Marta Dolcet
- Department of Food Technology, University of Lleida, Lleida, Spain
| | - Mercè Torres
- Department of Food Technology, University of Lleida, Lleida, Spain
| | | |
Collapse
|
26
|
Li C, Hu D, Zong XC, Deng C, Feng L, Wu MC, Li JF. Asymmetric hydrolysis of styrene oxide by PvEH2, a novel Phaseolus vulgaris epoxide hydrolase with extremely high enantioselectivity and regioselectivity. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.08.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
|
27
|
Hu D, Tang C, Li C, Kan T, Shi X, Feng L, Wu M. Stereoselective Hydrolysis of Epoxides by reVrEH3, a Novel Vigna radiata Epoxide Hydrolase with High Enantioselectivity or High and Complementary Regioselectivity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9861-9870. [PMID: 29058432 DOI: 10.1021/acs.jafc.7b03804] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To provide more options for the stereoselective hydrolysis of epoxides, an epoxide hydrolase (VrEH3) gene from Vigna radiata was cloned and expressed in Escherichia coli. Recombinant VrEH3 displayed the maximum activity at pH 7.0 and 45 °C and high stability at pH 4.5-7.5 and 55 °C. Notably, reVrEH3 exhibited high and complementary regioselectivity toward styrene oxides 1a-3a and high enantioselectivity (E = 48.7) toward o-cresyl glycidyl ether 9a. To elucidate these interesting phenomena, the interactions of the three-dimensional structure between VrEH3 and enantiomers of 1a and 9a were analyzed by molecular docking simulation. Using E. coli/vreh3 whole cells, gram-scale preparations of (R)-1b and (R)-9a were performed by enantioconvergent hydrolysis of 100 mM rac-1a and kinetic resolution of 200 mM rac-9a in the buffer-free water system at 25 °C. These afforded (R)-1b with >99% eep and 78.7% overall yield after recrystallization and (R)-9a with >99% ees, 38.7% overall yield, and 12.7 g/L/h space-time yield.
Collapse
Affiliation(s)
| | - Cunduo Tang
- Nanyang Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University , Henan 473061, China
| | | | | | | | | | | |
Collapse
|
28
|
Hvorecny KL, Bahl CD, Kitamura S, Lee KSS, Hammock BD, Morisseau C, Madden DR. Active-Site Flexibility and Substrate Specificity in a Bacterial Virulence Factor: Crystallographic Snapshots of an Epoxide Hydrolase. Structure 2017; 25:697-707.e4. [PMID: 28392259 DOI: 10.1016/j.str.2017.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/20/2017] [Accepted: 03/09/2017] [Indexed: 02/07/2023]
Abstract
Pseudomonas aeruginosa secretes an epoxide hydrolase with catalytic activity that triggers degradation of the cystic fibrosis transmembrane conductance regulator (CFTR) and perturbs other host defense networks. Targets of this CFTR inhibitory factor (Cif) are largely unknown, but include an epoxy-fatty acid. In this class of signaling molecules, chirality can be an important determinant of physiological output and potency. Here we explore the active-site chemistry of this two-step α/β-hydrolase and its implications for an emerging class of virulence enzymes. In combination with hydrolysis data, crystal structures of 15 trapped hydroxyalkyl-enzyme intermediates reveal the stereochemical basis of Cif's substrate specificity, as well as its regioisomeric and enantiomeric preferences. The structures also reveal distinct sets of conformational changes that enable the active site to expand dramatically in two directions, accommodating a surprising array of potential physiological epoxide targets. These new substrates may contribute to Cif's diverse effects in vivo, and thus to the success of P. aeruginosa and other pathogens during infection.
Collapse
Affiliation(s)
- Kelli L Hvorecny
- Department of Biochemistry and Cell Biology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Christopher D Bahl
- Department of Biochemistry and Cell Biology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Seiya Kitamura
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California at Davis, Davis, CA 95616, USA
| | - Kin Sing Stephen Lee
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California at Davis, Davis, CA 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California at Davis, Davis, CA 95616, USA
| | - Christophe Morisseau
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California at Davis, Davis, CA 95616, USA
| | - Dean R Madden
- Department of Biochemistry and Cell Biology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA.
| |
Collapse
|
29
|
Ye HH, Hu D, Shi XL, Wu MC, Deng C, Li JF. Directed modification of a novel epoxide hydrolase from Phaseolus vulgaris to improve its enantioconvergence towards styrene epoxides. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.08.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
|
30
|
Lind MES, Himo F. Quantum Chemical Modeling of Enantioconvergency in Soluble Epoxide Hydrolase. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01562] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Maria E. S. Lind
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| |
Collapse
|
31
|
Bauer P, Carlsson ÅJ, Amrein BA, Dobritzsch D, Widersten M, Kamerlin SCL. Conformational diversity and enantioconvergence in potato epoxide hydrolase 1. Org Biomol Chem 2016; 14:5639-51. [PMID: 27049844 PMCID: PMC5315018 DOI: 10.1039/c6ob00060f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 03/31/2016] [Indexed: 01/11/2023]
Abstract
Potato epoxide hydrolase 1 (StEH1) is a biocatalytically important enzyme that exhibits rich enantio- and regioselectivity in the hydrolysis of chiral epoxide substrates. In particular, StEH1 has been demonstrated to enantioconvergently hydrolyze racemic mixes of styrene oxide (SO) to yield (R)-1-phenylethanediol. This work combines computational, crystallographic and biochemical analyses to understand both the origins of the enantioconvergent behavior of the wild-type enzyme, as well as shifts in activities and substrate binding preferences in an engineered StEH1 variant, R-C1B1, which contains four active site substitutions (W106L, L109Y, V141K and I155V). Our calculations are able to reproduce both the enantio- and regioselectivities of StEH1, and demonstrate a clear link between different substrate binding modes and the corresponding selectivity, with the preferred binding modes being shifted between the wild-type enzyme and the R-C1B1 variant. Additionally, we demonstrate that the observed changes in selectivity and the corresponding enantioconvergent behavior are due to a combination of steric and electrostatic effects that modulate both the accessibility of the different carbon atoms to the nucleophilic side chain of D105, as well as the interactions between the substrate and protein amino acid side chains and active site water molecules. Being able to computationally predict such subtle effects for different substrate enantiomers, as well as to understand their origin and how they are affected by mutations, is an important advance towards the computational design of improved biocatalysts for enantioselective synthesis.
Collapse
Affiliation(s)
- P. Bauer
- Science for Life Laboratory , Department of Cell and Molecular Biology , Uppsala University , BMC Box 596 , S-751 24 Uppsala , Sweden .
| | - Å. Janfalk Carlsson
- Department of Chemistry-BMC , Uppsala University , BMC Box 576 , S-751 23 Uppsala , Sweden . ;
| | - B. A. Amrein
- Science for Life Laboratory , Department of Cell and Molecular Biology , Uppsala University , BMC Box 596 , S-751 24 Uppsala , Sweden .
| | - D. Dobritzsch
- Department of Chemistry-BMC , Uppsala University , BMC Box 576 , S-751 23 Uppsala , Sweden . ;
| | - M. Widersten
- Department of Chemistry-BMC , Uppsala University , BMC Box 576 , S-751 23 Uppsala , Sweden . ;
| | - S. C. L. Kamerlin
- Science for Life Laboratory , Department of Cell and Molecular Biology , Uppsala University , BMC Box 596 , S-751 24 Uppsala , Sweden .
| |
Collapse
|
32
|
Amrein BA, Bauer P, Duarte F, Janfalk Carlsson Å, Naworyta A, Mowbray SL, Widersten M, Kamerlin SCL. Expanding the Catalytic Triad in Epoxide Hydrolases and Related Enzymes. ACS Catal 2015; 5:5702-5713. [PMID: 26527505 PMCID: PMC4613740 DOI: 10.1021/acscatal.5b01639] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/15/2015] [Indexed: 11/30/2022]
Abstract
Potato epoxide hydrolase 1 exhibits rich enantio- and regioselectivity in the hydrolysis of a broad range of substrates. The enzyme can be engineered to increase the yield of optically pure products as a result of changes in both enantio- and regioselectivity. It is thus highly attractive in biocatalysis, particularly for the generation of enantiopure fine chemicals and pharmaceuticals. The present work aims to establish the principles underlying the activity and selectivity of the enzyme through a combined computational, structural, and kinetic study using the substrate trans-stilbene oxide as a model system. Extensive empirical valence bond simulations have been performed on the wild-type enzyme together with several experimentally characterized mutants. We are able to computationally reproduce the differences between the activities of different stereoisomers of the substrate and the effects of mutations of several active-site residues. In addition, our results indicate the involvement of a previously neglected residue, H104, which is electrostatically linked to the general base H300. We find that this residue, which is highly conserved in epoxide hydrolases and related hydrolytic enzymes, needs to be in its protonated form in order to provide charge balance in an otherwise negatively charged active site. Our data show that unless the active-site charge balance is correctly treated in simulations, it is not possible to generate a physically meaningful model for the enzyme that can accurately reproduce activity and selectivity trends. We also expand our understanding of other catalytic residues, demonstrating in particular the role of a noncanonical residue, E35, as a "backup base" in the absence of H300. Our results provide a detailed view of the main factors driving catalysis and regioselectivity in this enzyme and identify targets for subsequent enzyme design efforts.
Collapse
Affiliation(s)
- Beat A. Amrein
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| | - Paul Bauer
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| | - Fernanda Duarte
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| | - Åsa Janfalk Carlsson
- Department
of Chemistry-BMC, Uppsala University, BMC Box 576, SE-751 23 Uppsala, Sweden
| | - Agata Naworyta
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| | - Sherry L. Mowbray
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| | - Mikael Widersten
- Department
of Chemistry-BMC, Uppsala University, BMC Box 576, SE-751 23 Uppsala, Sweden
| | - Shina C. L. Kamerlin
- Science
for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University, BMC
Box 596, SE-751 24 Uppsala, Sweden
| |
Collapse
|
33
|
Efficient kinetic resolution of phenyl glycidyl ether by a novel epoxide hydrolase from Tsukamurella paurometabola. Appl Microbiol Biotechnol 2015; 99:9511-21. [DOI: 10.1007/s00253-015-6716-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/16/2015] [Accepted: 05/21/2015] [Indexed: 10/23/2022]
|
34
|
Expression of a novel epoxide hydrolase of Aspergillus usamii E001 in Escherichia coli and its performance in resolution of racemic styrene oxide. ACTA ACUST UNITED AC 2015; 42:671-80. [DOI: 10.1007/s10295-015-1604-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 02/16/2015] [Indexed: 11/27/2022]
Abstract
Abstract
The full-length cDNA sequence of Aueh2, a gene encoding an epoxide hydrolase of Aspergillus usamii E001 (abbreviated to AuEH2), was amplified from the total RNA. Synchronously, the complete DNA sequence containing 5′, 3′ flanking regions, eight exons and seven introns was cloned from the genomic DNA. In addition, a cDNA fragment of Aueh2 encoding a 395-aa AuEH2 was expressed in Escherichia coli. The catalytic activity of recombinant AuEH2 (re-AuEH2) was 1.44 U/ml using racemic styrene oxide (SO) as the substrate. The purified re-AuEH2 displayed the maximum activity at pH 7.0 and 35 °C. It was highly stable at a pH range of 5.0–7.5, and at 40 °C or below. Its activity was not obviously influenced by β-mercaptoethanol, EDTA and most of metal ions tested, but was inhibited by Hg2+, Sn2+, Cu2+, Fe3+ and Zn2+. The K m and V max of re-AuEH2 were 5.90 mM and 20.1 U/mg towards (R)-SO, while 7.66 mM and 3.19 U/mg towards (S)-SO. Its enantiomeric ratio (E) for resolution of racemic SO was 24.2 at 10 °C. The experimental result of re-AuEH2 biasing towards (R)-SO was consistent with the analytical one by molecular docking (MD) simulation.
Collapse
|
35
|
Widersten M. Protein engineering for development of new hydrolytic biocatalysts. Curr Opin Chem Biol 2014; 21:42-7. [PMID: 24769269 DOI: 10.1016/j.cbpa.2014.03.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/18/2014] [Accepted: 03/25/2014] [Indexed: 11/19/2022]
Abstract
Hydrolytic enzymes play important roles as biocatalysts in chemical synthesis. The chemical versatility and structurally sturdy features of Candida antarctica lipase B has placed this enzyme as a common utensil in the synthetic tool-box. In addition to catalyzing acyl transfer reactions, a number of promiscuous activities have been described recently. Some of these new enzyme activities have been amplified by mutagenesis. Epoxide hydrolases are of interest due to their potential as catalysts in asymmetric synthesis. This current update discusses recent development in the engineering of lipases and epoxide hydrolases aiming to generate new biocatalysts with refined features as compared to the wild-type enzymes. Reported progress in improvements in reaction atom economy from dynamic kinetic resolution or enantioconvergence is also included.
Collapse
Affiliation(s)
- Mikael Widersten
- Department of Chemistry-BMC, Uppsala University, Box 576, SE 751 23 Uppsala, Sweden.
| |
Collapse
|
36
|
Wu S, Chen Y, Xu Y, Li A, Xu Q, Glieder A, Li Z. Enantioselective trans-Dihydroxylation of Aryl Olefins by Cascade Biocatalysis with Recombinant Escherichia coli Coexpressing Monooxygenase and Epoxide Hydrolase. ACS Catal 2014. [DOI: 10.1021/cs400992z] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Shuke Wu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
- Singapore-MIT
Alliance, National University of Singapore, 4 Engineering Drive 3, Singapore 117583
| | - Yongzheng Chen
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Yi Xu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Aitao Li
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Qisong Xu
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
| | - Anton Glieder
- Institute of Molecular
Biotechnology, Graz University of Technology, Petersgasse 14, 8010 Graz, Austria
| | - Zhi Li
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585
- Singapore-MIT
Alliance, National University of Singapore, 4 Engineering Drive 3, Singapore 117583
| |
Collapse
|
37
|
Zhang ZJ, Pan J, Ma BD, Xu JH. Efficient Biocatalytic Synthesis of Chiral Chemicals. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2014; 155:55-106. [DOI: 10.1007/10_2014_291] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
38
|
Enantioselective hydrolysis of racemic styrene oxide and its substituted derivatives using newly-isolated Sphingopyxis sp. exhibiting a novel epoxide hydrolase activity. Biotechnol Lett 2013; 36:357-62. [DOI: 10.1007/s10529-013-1373-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 09/26/2013] [Indexed: 11/28/2022]
|
39
|
Beloti LL, Costa BZ, Toledo MA, Santos CA, Crucello A, Fávaro MT, Santiago AS, Mendes JS, Marsaioli AJ, Souza AP. A novel and enantioselective epoxide hydrolase from Aspergillus brasiliensis CCT 1435: Purification and characterization. Protein Expr Purif 2013; 91:175-83. [DOI: 10.1016/j.pep.2013.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 07/21/2013] [Accepted: 08/03/2013] [Indexed: 10/26/2022]
|
40
|
McKenna R, Pugh S, Thompson B, Nielsen DR. Microbial production of the aromatic building-blocks (S)-styrene oxide and (R)-1,2-phenylethanediol from renewable resources. Biotechnol J 2013; 8:1465-75. [DOI: 10.1002/biot.201300035] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 05/31/2013] [Accepted: 06/25/2013] [Indexed: 11/08/2022]
|
41
|
Schober M, Faber K. Inverting hydrolases and their use in enantioconvergent biotransformations. Trends Biotechnol 2013; 31:468-78. [PMID: 23809848 PMCID: PMC3725421 DOI: 10.1016/j.tibtech.2013.05.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/14/2013] [Accepted: 05/14/2013] [Indexed: 01/23/2023]
Abstract
Enantioconvergent processes overcome the 50%-yield limits of kinetic resolution. Inverting enzymes are key catalysts for enantioconvergent processes. Enzyme engineering provided improved variants of inverting enzymes.
Owing to the more abundant occurrence of racemic compounds compared to prochiral or meso forms, most enantiomerically pure products are obtained via racemate resolution. This review summarizes (chemo)enzymatic enantioconvergent processes based on the use of hydrolytic enzymes, which are able to invert a stereocenter during catalysis that can overcome the 50%-yield limitation of kinetic resolution. Recent developments are presented in the fields of inverting or retaining sulfatases, epoxide hydrolases and dehalogenases, which allow the production of secondary alcohols or vicinal diols at a 100% theoretical yield from a racemate via enantioconvergent processes.
Collapse
Affiliation(s)
- Markus Schober
- Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | | |
Collapse
|
42
|
Duarah A, Goswami A, Bora TC, Talukdar M, Gogoi BK. Enantioconvergent Biohydrolysis of Racemic Styrene Oxide to R-phenyl-1, 2-ethanediol by a Newly Isolated Filamentous Fungus Aspergillus tubingensis TF1. Appl Biochem Biotechnol 2013; 170:1965-73. [DOI: 10.1007/s12010-013-0324-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 06/09/2013] [Indexed: 11/29/2022]
|
43
|
Zhu QQ, He WH, Kong XD, Fan LQ, Zhao J, Li SX, Xu JH. Heterologous overexpression of Vigna radiata epoxide hydrolase in Escherichia coli and its catalytic performance in enantioconvergent hydrolysis of p-nitrostyrene oxide into (R)-p-nitrophenyl glycol. Appl Microbiol Biotechnol 2013; 98:207-18. [DOI: 10.1007/s00253-013-4845-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/03/2013] [Accepted: 03/08/2013] [Indexed: 11/25/2022]
|
44
|
Li Z, Liu W, Chen X, Jia S, Wu Q, Zhu D, Ma Y. Highly enantioselective double reduction of phenylglyoxal to ( R )-1-phenyl-1,2-ethanediol by one NADPH-dependent yeast carbonyl reductase with a broad substrate profile. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
45
|
Schober M, Toesch M, Knaus T, Strohmeier GA, van Loo B, Fuchs M, Hollfelder F, Macheroux P, Faber K. One-Pot Deracemization of sec-Alcohols: Enantioconvergent Enzymatic Hydrolysis of Alkyl Sulfates Using Stereocomplementary Sulfatases. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 125:3359-3361. [PMID: 25821253 PMCID: PMC4373141 DOI: 10.1002/ange.201209946] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 01/12/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Markus Schober
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Michael Toesch
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Tanja Knaus
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Gernot A Strohmeier
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Bert van Loo
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Michael Fuchs
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Florian Hollfelder
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Peter Macheroux
- M. Schober, M. Toesch, Dr. M. Fuchs, Prof. K. Faber Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria)
- Dr. T. Knaus, Prof. P. Macheroux Institute of Biochemistry, Graz University of Technology
- Dr. G. A. Strohmeier ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
- Dr. B. van Loo, Prof. F. Hollfelder Department of Biochemistry, University of Cambridge
| | - Kurt Faber
- *Department of Chemistry, Organic & Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz (Austria) E-mail: Homepage: http://biocatalysis.uni-graz.at/
| |
Collapse
|
46
|
Schober M, Toesch M, Knaus T, Strohmeier GA, van Loo B, Fuchs M, Hollfelder F, Macheroux P, Faber K. One-pot deracemization of sec-alcohols: enantioconvergent enzymatic hydrolysis of alkyl sulfates using stereocomplementary sulfatases. Angew Chem Int Ed Engl 2013; 52:3277-9. [PMID: 23401148 PMCID: PMC3743160 DOI: 10.1002/anie.201209946] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 01/12/2013] [Indexed: 12/03/2022]
Affiliation(s)
- Markus Schober
- Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria) E-mail: Homepage: http://biocatalysis.uni-graz.at/
| | - Michael Toesch
- Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria) E-mail: Homepage: http://biocatalysis.uni-graz.at/
| | - Tanja Knaus
- Institute of Biochemistry, Graz University of Technology
| | - Gernot A Strohmeier
- ACIB GmbH c/o Department of Organic Chemistry, Graz University of Technology
| | - Bert van Loo
- Department of Biochemistry, University of Cambridge
| | - Michael Fuchs
- Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria) E-mail: Homepage: http://biocatalysis.uni-graz.at/
| | | | | | - Kurt Faber
- Department of Chemistry, Organic & Bioorganic Chemistry, University of GrazHeinrichstrasse 28, 8010 Graz (Austria) E-mail: Homepage: http://biocatalysis.uni-graz.at/
| |
Collapse
|
47
|
Carlsson ÅJ, Bauer P, Ma H, Widersten M. Obtaining optical purity for product diols in enzyme-catalyzed epoxide hydrolysis: contributions from changes in both enantio- and regioselectivity. Biochemistry 2012; 51:7627-37. [PMID: 22931287 DOI: 10.1021/bi3007725] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enzyme variants of the plant epoxide hydrolase StEH1 displaying improved stereoselectivities in the catalyzed hydrolysis of (2,3-epoxypropyl)benzene were generated by directed evolution. The evolution was driven by iterative saturation mutagenesis in combination with enzyme activity screenings where product chirality was the decisive selection criterion. Analysis of the underlying causes of the increased diol product ratios revealed two major contributing factors: increased enantioselectivity for the corresponding epoxide enantiomer(s) and, in some cases, a concomitant change in regioselectivity in the catalyzed epoxide ring-opening half-reaction. Thus, variant enzymes that catalyzed the hydrolysis of racemic (2,3-epoxypropyl)benzene into the R-diol product in an enantioconvergent manner were isolated.
Collapse
Affiliation(s)
- Åsa Janfalk Carlsson
- Department of Chemistry-BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | | | | | | |
Collapse
|
48
|
One-pot synthesis of enantiomerically pure 1, 2-diols: asymmetric reduction of aromatic α-oxoaldehydes catalysed by Candida parapsilosis ATCC 7330. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.12.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
49
|
Kotik M, Archelas A, Faměrová V, Oubrechtová P, Křen V. Laboratory evolution of an epoxide hydrolase – Towards an enantioconvergent biocatalyst. J Biotechnol 2011; 156:1-10. [DOI: 10.1016/j.jbiotec.2011.08.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 07/25/2011] [Accepted: 08/03/2011] [Indexed: 11/29/2022]
|
50
|
Szymański W, Westerbeek A, Janssen DB, Feringa BL. A simple enantioconvergent and chemoenzymatic synthesis of optically active α-substituted amides. Angew Chem Int Ed Engl 2011; 50:10712-5. [PMID: 21922620 DOI: 10.1002/anie.201105164] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 11/07/2022]
Affiliation(s)
- Wiktor Szymański
- Center for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | | | | | | |
Collapse
|