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Liang C, Duan X, Gao H, Shahab M, Zheng G. Chemoenzymatic synthesis of (1R,3R)-3-hydroxycyclopentanemethanol: An intermediate of carbocyclic-ddA. J Biosci Bioeng 2024; 138:111-117. [PMID: 38824112 DOI: 10.1016/j.jbiosc.2024.05.002] [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: 03/13/2024] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 06/03/2024]
Abstract
The synthesis of carbocyclic-ddA, a potent antiviral agent against hepatitis B, relies significantly on (1R,3R)-3-hydroxycyclopentanemethanol as a key intermediate. To effectively produce this intermediate, our study employed a chemoenzymatic approach. The selection of appropriate biocatalysts was based on substrate similarity, leading us to adopt the CrS enoate reductase derived from Thermus scotoductus SA-01. Additionally, we developed an enzymatic system for NADH regeneration, utilising formate dehydrogenase from Candida boidinii. This system facilitated the efficient catalysis of (S)-4-(hydroxymethyl)cyclopent-2-enone, resulting in the formation of (3R)-3-(hydroxymethyl) cyclopentanone. Furthermore, we successfully cloned, expressed, purified, and characterized the CrS enzyme in Escherichia coli. Optimal reaction conditions were determined, revealing that the highest activity occurred at 45 °C and pH 8.0. By employing 5 mM (S)-4-(hydroxymethyl)cyclopent-2-enone, 0.05 mM FMN, 0.2 mM NADH, 10 μM CrS, 40 μM formic acid dehydrogenase, and 40 mM sodium formate, complete conversion was achieved within 45 min at 35 °C and pH 7.0. Subsequently, (1R,3R)-3-hydroxycyclopentanemethanol was obtained through a simple three-step chemical conversion process. This study not only presents an effective method for synthesizing the crucial intermediate but also highlights the importance of biocatalysts and enzymatic systems in chemoenzymatic synthesis approaches.
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Affiliation(s)
- Chaoqun Liang
- State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Bontac Bio-Engineering (Shenzhen) Co., Ltd., Shenzhen, Guangdong 518107, China
| | - Xiuyuan Duan
- State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hanzi Gao
- State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Muhammad Shahab
- State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Guojun Zheng
- State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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2
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Kattula B, Munakala A, Kashyap R, Nallamilli T, Nagendla NK, Naza S, Mudiam MKR, Chegondi R, Addlagatta A. Strategic enzymatic enantioselective desymmetrization of prochiral cyclohexa-2,5-dienones. Chem Commun (Camb) 2024; 60:6647-6650. [PMID: 38856301 DOI: 10.1039/d4cc02181a] [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: 06/11/2024]
Abstract
Asymmetric desymmetrization through the selective reduction of one double bond of prochiral 2,5-cyclohexadienones is highly challenging. A novel method has been developed for synthesizing chiral cyclohexenones by employing an ene-reductase (Bacillus subtilis YqjM) enzyme that belongs to the OYE family. Our strategy demonstrates high substrate scope and enantioselectivity towards substrates containing all-carbon as well as heteroatom (O, N)-containing quaternary centers. The mechanistic studies (kH/D = ∼1.8) indicate that hydride transfer is probably the rate-limiting step. Mutation of several active site residues did not affect the stereochemical outcomes. This work provides a convenient way of synthesizing various enantioselective γ,γ-disubstituted cyclohexanones using enzymes.
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Affiliation(s)
- Bhavita Kattula
- Department of Applied Biology, Hyderabad, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Anandarao Munakala
- Department of Organic Synthesis and Process Chemistry, Hyderabad, Telangana, India.
| | | | - Tarun Nallamilli
- Department of Organic Synthesis and Process Chemistry, Hyderabad, Telangana, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Narendra Kumar Nagendla
- Department of Analytical and Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Surabhi Naza
- Department of Applied Biology, Hyderabad, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Mohana Krishna Reddy Mudiam
- Department of Analytical and Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Rambabu Chegondi
- Department of Organic Synthesis and Process Chemistry, Hyderabad, Telangana, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Anthony Addlagatta
- Department of Applied Biology, Hyderabad, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Kerschbaumer B, Totaro MG, Friess M, Breinbauer R, Bijelic A, Macheroux P. Loop 6 and the β-hairpin flap are structural hotspots that determine cofactor specificity in the FMN-dependent family of ene-reductases. FEBS J 2024; 291:1560-1574. [PMID: 38263933 DOI: 10.1111/febs.17055] [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: 11/06/2023] [Revised: 12/04/2023] [Accepted: 01/08/2024] [Indexed: 01/25/2024]
Abstract
Flavin mononucleotide (FMN)-dependent ene-reductases constitute a large family of oxidoreductases that catalyze the enantiospecific reduction of carbon-carbon double bonds. The reducing equivalents required for substrate reduction are obtained from reduced nicotinamide by hydride transfer. Most ene-reductases significantly prefer, or exclusively accept, either NADPH or NADH. Despite their usefulness in biocatalytic applications, the structural determinants for cofactor preference remain elusive. We employed the NADPH-preferring 12-oxophytodienoic acid reductase 3 from Solanum lycopersicum (SlOPR3) as a model enzyme of the ene-reductase family and applied computational and structural methods to investigate the binding specificity of the reducing coenzymes. Initial docking results indicated that the arginine triad R283, R343, and R366 residing on and close to a critical loop at the active site (loop 6) are the main contributors to NADPH binding. In contrast, NADH binds unfavorably in the opposite direction toward the β-hairpin flap within a largely hydrophobic region. Notably, the crystal structures of SlOPR3 in complex with either NADPH4 or NADH4 corroborated these different binding modes. Molecular dynamics simulations confirmed NADH binding near the β-hairpin flap and provided structural explanations for the low binding affinity of NADH to SlOPR3. We postulate that cofactor specificity is determined by the arginine triad/loop 6 and the residue(s) controlling access to a hydrophobic cleft formed by the β-hairpin flap. Thus, NADPH preference depends on a properly positioned arginine triad, whereas granting access to the hydrophobic cleft at the β-hairpin flap favors NADH binding.
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Affiliation(s)
| | - Massimo G Totaro
- Institute of Biochemistry, Graz University of Technology, Austria
| | - Michael Friess
- Institute of Organic Chemistry, Graz University of Technology, Austria
| | - Rolf Breinbauer
- Institute of Organic Chemistry, Graz University of Technology, Austria
| | | | - Peter Macheroux
- Institute of Biochemistry, Graz University of Technology, Austria
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4
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Roth S, Niese R, Müller M, Hall M. Redox Out of the Box: Catalytic Versatility Across NAD(P)H-Dependent Oxidoreductases. Angew Chem Int Ed Engl 2024; 63:e202314740. [PMID: 37924279 DOI: 10.1002/anie.202314740] [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: 10/01/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/06/2023]
Abstract
The asymmetric reduction of double bonds using NAD(P)H-dependent oxidoreductases has proven to be an efficient tool for the synthesis of important chiral molecules in research and on industrial scale. These enzymes are commercially available in screening kits for the reduction of C=O (ketones), C=C (activated alkenes), or C=N bonds (imines). Recent reports, however, indicate that the ability to accommodate multiple reductase activities on distinct C=X bonds occurs in different enzyme classes, either natively or after mutagenesis. This challenges the common perception of highly selective oxidoreductases for one type of electrophilic substrate. Consideration of this underexplored potential in enzyme screenings and protein engineering campaigns may contribute to the identification of complementary biocatalytic processes for the synthesis of chiral compounds. This review will contribute to a global understanding of the promiscuous behavior of NAD(P)H-dependent oxidoreductases on C=X bond reduction and inspire future discoveries with respect to unconventional biocatalytic routes in asymmetric synthesis.
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Affiliation(s)
- Sebastian Roth
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010, Graz, Austria
| | - Richard Niese
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
| | - Michael Müller
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstrasse 25, 79104, Freiburg, Germany
| | - Mélanie Hall
- Institute of Chemistry, University of Graz, Heinrichstrasse 28, 8010, Graz, Austria
- BioHealth, Field of Excellence, University of Graz, 8010, Graz, Austria
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5
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Petchey MR, Ye Y, Spelling V, Finnigan JD, Gittings S, Johansson MJ, Hayes MA, Hyster TK. Regiodivergent Radical Termination for Intermolecular Biocatalytic C-C Bond Formation. J Am Chem Soc 2024; 146:5005-5010. [PMID: 38329236 PMCID: PMC10885151 DOI: 10.1021/jacs.4c00482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 02/09/2024]
Abstract
Radical hydrofunctionalizations of electronically unbiased dienes are challenging to render regioselective, because the products are nearly identical in energy. Here, we report two engineered FMN-dependent "ene"-reductases (EREDs) that catalyze regiodivergent hydroalkylations of cyclic and linear dienes. While previous studies focused exclusively on the stereoselectivity of alkene hydroalkylation, this work highlights that EREDs can control the regioselectivity of hydrogen atom transfer, providing a method for selectively preparing constitutional isomers that would be challenging to prepare using traditional synthetic methods. Engineering the ERED from Gluconabacter sp. (GluER) furnished a variant that favors the γ,δ-unsaturated ketone, while an engineered variant from a commercial ERED panel favors the δ,ε-unsaturated ketone. The effect of beneficial mutations has been investigated using substrate docking studies and the mechanism probed by isotope labeling experiments. A variety of α-bromo ketones can be coupled with cyclic and linear dienes. These interesting building blocks can also be further modified to generate difficult-to-access heterocyclic compounds.
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Affiliation(s)
- Mark R. Petchey
- Compound
Synthesis and Management, Discovery Sciences,
BioPharma R&D, AstraZeneca,
Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - Yuxuan Ye
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca 14850, New York, United States
| | - Victor Spelling
- Early
Chemical Development, Pharmaceutical Sciences, BioPharma R&D, AstraZeneca,
Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - James D. Finnigan
- Prozomix
Ltd., Building 4, West
End Industrial Estate, Haltwhistle NE49 9HA, U.K.
| | - Samantha Gittings
- Prozomix
Ltd., Building 4, West
End Industrial Estate, Haltwhistle NE49 9HA, U.K.
| | - Magnus J. Johansson
- Medicinal
Chemistry, Research and Early Development, Cardiovascular, Renal and
Metabolism (CVRM), BioPharma R&D, AstraZeneca, Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - Martin A. Hayes
- Compound
Synthesis and Management, Discovery Sciences,
BioPharma R&D, AstraZeneca,
Pepparedsleden 1, 431 83 Mölndal, Sweden
| | - Todd K. Hyster
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca 14850, New York, United States
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6
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Libardi SH, Ahmad A, Ferreira FB, Oliveira RJ, Caruso ÍP, Melo FA, de Albuquerque S, Cardoso DR, Burtoloso ACB, Borges JC. Interaction between diterpene icetexanes and old yellow enzymes of Leishmania braziliensis and Trypanosoma cruzi. Int J Biol Macromol 2024; 259:129192. [PMID: 38216013 DOI: 10.1016/j.ijbiomac.2023.129192] [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: 06/24/2023] [Revised: 12/21/2023] [Accepted: 12/31/2023] [Indexed: 01/14/2024]
Abstract
Old Yellow Enzymes (OYEs) are flavin-dependent redox enzymes that promote the asymmetric reduction of activated alkenes. Due to the high importance of flavoenzymes in the metabolism of organisms, the interaction between OYEs from the parasites Trypanosoma cruzi and Leishmania braziliensis and three diterpene icetexanes (brussonol and two analogs), were evaluated in the present study, and differences in the binding mechanism and inhibition capacity of these molecules were examined. Although the aforementioned compounds showed poor and negligible activities against T. cruzi and L. braziliensis cells, respectively, the experiments with the purified enzymes indicated that the interaction occurs by divergent mechanisms. Overall, the ligands' inhibitory effect depends on their accessibility to the N5 position of the flavin's isoalloxazine ring. The results also indicated that the OYEs found in both parasites share structural similarities and showed affinities for the diterpene icetexanes in the same range. Nevertheless, the interaction between OYEs and ligands is directed by enthalpy and/or entropy in distinct ways. In conclusion, the binding site of both OYEs exhibits remarkable plasticity, and a large range of different molecules, including that can be substrates and inhibitors, can bind this site. This plasticity should be considered in drug design using OYE as a target.
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Affiliation(s)
- Silvia H Libardi
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Anees Ahmad
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | | | - Ronaldo J Oliveira
- Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, 38064-200 Uberaba, MG, Brazil
| | - Ícaro P Caruso
- Instituto de Biociências, Letras e Ciências Exatas (IBILCE) - UNESP, 15054-000 São José do Rio Preto, SP, Brazil; Instituto de Bioquímica Médica Leopoldo de Meis and Centro Nacional para Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Fernando A Melo
- Instituto de Biociências, Letras e Ciências Exatas (IBILCE) - UNESP, 15054-000 São José do Rio Preto, SP, Brazil
| | - Sergio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo - USP, Ribeirão Preto, SP CEP 14040-903, Brazil
| | - Daniel R Cardoso
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Antonio C B Burtoloso
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Júlio C Borges
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil.
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7
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Liu Y, Ma T, Guo Z, Zhou L, Liu G, He Y, Ma L, Gao J, Bai J, Hollmann F, Jiang Y. Asymmetric α-benzylation of cyclic ketones enabled by concurrent chemical aldol condensation and biocatalytic reduction. Nat Commun 2024; 15:71. [PMID: 38167391 PMCID: PMC10761851 DOI: 10.1038/s41467-023-44452-z] [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: 05/15/2023] [Accepted: 12/13/2023] [Indexed: 01/05/2024] Open
Abstract
Chemoenzymatic cascade catalysis has emerged as a revolutionary tool for streamlining traditional retrosynthetic disconnections, creating new possibilities for the asymmetric synthesis of valuable chiral compounds. Here we construct a one-pot concurrent chemoenzymatic cascade by integrating organobismuth-catalyzed aldol condensation with ene-reductase (ER)-catalyzed enantioselective reduction, enabling the formal asymmetric α-benzylation of cyclic ketones. To achieve this, we develop a pair of enantiocomplementary ERs capable of reducing α-arylidene cyclic ketones, lactams, and lactones. Our engineered mutants exhibit significantly higher activity, up to 37-fold, and broader substrate specificity compared to the parent enzyme. The key to success is due to the well-tuned hydride attack distance/angle and, more importantly, to the synergistic proton-delivery triade of Tyr28-Tyr69-Tyr169. Molecular docking and density functional theory (DFT) studies provide important insights into the bioreduction mechanisms. Furthermore, we demonstrate the synthetic utility of the best mutants in the asymmetric synthesis of several key chiral synthons.
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Affiliation(s)
- Yunting Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Teng Ma
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Zhongxu Guo
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Liya Zhou
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Guanhua Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Ying He
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Li Ma
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Jing Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Jing Bai
- College of Food Science and Biology, Hebei University of Science & Technology, Shijiazhuang, 050018, China
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, 2629 HZ, Delft, The Netherlands.
| | - Yanjun Jiang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China.
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8
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Alt TB, Hoag MR, Moran GR. Dihydropyrmidine dehydrogenase from Escherichia coli: Transient state analysis reveals both reductive activation prior to turnover and diminished substrate effector roles relative to the mammalian form. Arch Biochem Biophys 2023; 748:109772. [PMID: 37820757 DOI: 10.1016/j.abb.2023.109772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/13/2023]
Abstract
Dihydropyrimidine dehydrogenase (DPD) is an enzyme that uses an elaborate architecture to catalyze a simple net reaction: the reduction of the vinylic bond of uracil and thymine. Known DPDs have two active sites separated by approximately 60 Å. One active site has an FAD cofactor and binds NAD(P) and the other has an FMN cofactor and binds pyrimidines. The intervening distance is spanned by four Fe4S4 centers that act as an electron conduit. Recent advancements with porcine DPD have revealed unexpected chemical sequences where the enzyme undergoes reductive activation by transferring two electrons from NADPH to the FMN via the FAD such that the active form has the cofactor set FAD•4(Fe4S4)•FMNH2. Here we describe the first comprehensive kinetic investigation of a bacterial form of DPD. Using primarily transient state methods, DPD from E. coli (EcDPD) was shown to have a similar mechanism to that observed with the mammalian form in that EcDPD is observed to undergo reductive activation before pyrimidine reduction and displays half-of-sites activity. However, two distinct aspects of the EcDPD reaction relative to the mammalian enzyme were observed that relate to the effector roles for substrates: (i) the enzyme will rapidly take up electrons from NADH, reducing a flavin in the absence of pyrimidine substrate, and (ii) the activated form of the enzyme can become fully oxidized by transferring electrons to pyrimidine substrates in the absence of NADH.
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Affiliation(s)
- Tyler B Alt
- Department of Chemistry and Biochemistry, 1068 W Sheridan Rd, Loyola University Chicago, Chicago, IL 60660, USA
| | - Matthew R Hoag
- Department of Chemistry and Biochemistry, 1068 W Sheridan Rd, Loyola University Chicago, Chicago, IL 60660, USA
| | - Graham R Moran
- Department of Chemistry and Biochemistry, 1068 W Sheridan Rd, Loyola University Chicago, Chicago, IL 60660, USA.
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9
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Villa R, Ferrer-Carbonell C, Paul CE. Biocatalytic reduction of alkenes in micro-aqueous organic solvent catalysed by an immobilised ene reductase. Catal Sci Technol 2023; 13:5530-5535. [PMID: 38013840 PMCID: PMC10544049 DOI: 10.1039/d3cy00541k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/22/2023] [Indexed: 11/29/2023]
Abstract
Biocatalytic asymmetric reduction of alkenes in organic solvent is attractive for enantiopurity and product isolation, yet remains under developed. Herein we demonstrate the robustness of an ene reductase immobilised on Celite for the reduction of activated alkenes in micro-aqueous organic solvent. Full conversion was obtained in methyl t-butyl ether, avoiding hydrolysis and racemisation of products. The immobilised ene reductase showed reusability and a scale-up demonstrated its applicability.
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Affiliation(s)
- Rocio Villa
- Biocatalysis section, Department of Biotechnology, Delft University of Biotechnology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Claudia Ferrer-Carbonell
- Biocatalysis section, Department of Biotechnology, Delft University of Biotechnology van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Caroline E Paul
- Biocatalysis section, Department of Biotechnology, Delft University of Biotechnology van der Maasweg 9 2629 HZ Delft The Netherlands
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10
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Huang PC, Grunseich JM, Berg-Falloure KM, Tolley JP, Koiwa H, Bernal JS, Kolomiets MV. Maize OPR2 and LOX10 Mediate Defense against Fall Armyworm and Western Corn Rootworm by Tissue-Specific Regulation of Jasmonic Acid and Ketol Metabolism. Genes (Basel) 2023; 14:1732. [PMID: 37761872 PMCID: PMC10530937 DOI: 10.3390/genes14091732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 08/25/2023] [Accepted: 08/27/2023] [Indexed: 09/29/2023] Open
Abstract
Foliage-feeding fall armyworm (FAW; Spodoptera frugiperda) and root-feeding western corn rootworm (WCR; Diabrotica virgifera virgifera) are maize (Zea mays L.) pests that cause significant yield losses. Jasmonic acid (JA) plays a pivotal defense role against insects. 12-oxo-phytodienoic acid (12-OPDA) is converted into JA by peroxisome-localized OPDA reductases (OPR). However, little is known about the physiological functions of cytoplasmic OPRs. Here, we show that disruption of ZmOPR2 reduced wound-induced JA production and defense against FAW while accumulating more JA catabolites. Overexpression of ZmOPR2 in Arabidopsis enhanced JA production and defense against beet armyworm (BAW; Spodoptera exigua). In addition, lox10opr2 double mutants were more susceptible than either single mutant, suggesting that ZmOPR2 and ZmLOX10 uniquely and additively contributed to defense. In contrast to the defensive roles of ZmOPR2 and ZmLOX10 in leaves, single mutants did not display any alteration in root herbivory defense against WCR. Feeding on lox10opr2 double mutants resulted in increased WCR mortality associated with greater herbivory-induced production of insecticidal death acids and ketols. Thus, ZmOPR2 and ZmLOX10 cooperatively inhibit the synthesis of these metabolites during herbivory by WCR. We conclude that ZmOPR2 and ZmLOX10 regulate JA-mediated resistance in leaves against FAW while suppressing insecticidal oxylipin synthesis in roots during WCR infestation.
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Affiliation(s)
- Pei-Cheng Huang
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843-2132, USA; (P.-C.H.); (K.M.B.-F.)
| | - John M. Grunseich
- Department of Entomology, Texas A&M University, College Station, TX 77843-2475, USA;
| | - Katherine M. Berg-Falloure
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843-2132, USA; (P.-C.H.); (K.M.B.-F.)
| | - Jordan P. Tolley
- Department of Horticultural Sciences, Texas A&M University, College Station, TX77843-2133, USA; (J.P.T.); (H.K.)
| | - Hisashi Koiwa
- Department of Horticultural Sciences, Texas A&M University, College Station, TX77843-2133, USA; (J.P.T.); (H.K.)
| | - Julio S. Bernal
- Department of Entomology, Texas A&M University, College Station, TX 77843-2475, USA;
| | - Michael V. Kolomiets
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843-2132, USA; (P.-C.H.); (K.M.B.-F.)
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11
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Huang P, Tate M, Berg‐Falloure KM, Christensen SA, Zhang J, Schirawski J, Meeley R, Kolomiets MV. A non-JA producing oxophytodienoate reductase functions in salicylic acid-mediated antagonism with jasmonic acid during pathogen attack. MOLECULAR PLANT PATHOLOGY 2023; 24:725-741. [PMID: 36715587 PMCID: PMC10257049 DOI: 10.1111/mpp.13299] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 06/11/2023]
Abstract
Peroxisome-localized oxo-phytodienoic acid (OPDA) reductases (OPR) are enzymes converting 12-OPDA into jasmonic acid (JA). However, the biochemical and physiological functions of the cytoplasmic non-JA producing OPRs remain largely unknown. Here, we generated Mutator-insertional mutants of the maize OPR2 gene and tested its role in resistance to pathogens with distinct lifestyles. Functional analyses showed that the opr2 mutants were more susceptible to the (hemi)biotrophic pathogens Colletotrichum graminicola and Ustilago maydis, but were more resistant to the necrotrophic fungus Cochliobolus heterostrophus. Hormone profiling revealed that increased susceptibility to C. graminicola was associated with decreased salicylic acid (SA) but increased JA levels. Mutation of the JA-producing lipoxygenase 10 (LOX10) reversed this phenotype in the opr2 mutant background, corroborating the notion that JA promotes susceptibility to this pathogen. Exogenous SA did not rescue normal resistance levels in opr2 mutants, suggesting that this SA-inducible gene is the key downstream component of the SA-mediated defences against C. graminicola. Disease assays of the single and double opr2 and lox10 mutants and the JA-deficient opr7opr8 mutants showed that OPR2 negatively regulates JA biosynthesis, and that JA is required for resistance against C. heterostrophus. Overall, this study uncovers a novel function of a non-JA producing OPR as a major negative regulator of JA biosynthesis during pathogen infection, a function that leads to its contrasting contribution to either resistance or susceptibility depending on pathogen lifestyle.
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Affiliation(s)
- Pei‐Cheng Huang
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTexasUSA
| | - Morgan Tate
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTexasUSA
| | | | - Shawn A. Christensen
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTexasUSA
- Present address:
Nutrition, Dietetics, and Food ScienceBrigham Young UniversityProvoUtahUSA
| | - Jinglan Zhang
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTexasUSA
- Present address:
Obstetrics and Gynecology HospitalInstitute of Reproduction and Development, Fudan UniversityShanghaiChina
| | - Jan Schirawski
- Matthias‐Schleiden Institute/Genetics, Faculty of Biological SciencesFriedrich‐Schiller UniversityJenaGermany
| | | | - Michael V. Kolomiets
- Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationTexasUSA
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12
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Sun L, Van Loey A, Buvé C, Michiels CW. Experimental Evolution Reveals a Novel Ene Reductase That Detoxifies α,β-Unsaturated Aldehydes in Listeria monocytogenes. Microbiol Spectr 2023; 11:e0487722. [PMID: 37036358 PMCID: PMC10269891 DOI: 10.1128/spectrum.04877-22] [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: 11/30/2022] [Accepted: 03/17/2023] [Indexed: 04/11/2023] Open
Abstract
The plant essential oil component trans-cinnamaldehyde (t-CIN) exhibits antibacterial activity against a broad range of foodborne pathogenic bacteria, including L. monocytogenes, but its mode of action is not fully understood. In this study, several independent mutants of L. monocytogenes with increased t-CIN tolerance were obtained via experimental evolution. Whole-genome sequencing (WGS) analysis revealed single-nucleotide-variation mutations in the yhfK gene, encoding an oxidoreductase of the short-chain dehydrogenases/reductases superfamily, in each mutant. The deletion of yhfK conferred increased sensitivity to t-CIN and several other α,β-unsaturated aldehydes, including trans-2-hexenal, citral, and 4-hydroxy-2-nonenal. The t-CIN tolerance of the deletion mutant was restored via genetic complementation with yhfK. Based on a gas chromatography-mass spectrometry (GC-MS) analysis of the culture supernatants, it is proposed that YhfK is an ene reductase that converts t-CIN to 3-phenylpropanal by reducing the C=C double bond of the α,β-unsaturated aldehyde moiety. YhfK homologs are widely distributed in Bacteria, and the deletion of the corresponding homolog in Bacillus subtilis also caused increased sensitivity to t-CIN and trans-2-hexenal, suggesting that this protein may have a conserved function to protect bacteria against toxic α,β-unsaturated aldehydes in their environments. IMPORTANCE While bacterial resistance against clinically used antibiotics has been well studied, less is known about resistance against other antimicrobials, such as natural compounds that could replace traditional food preservatives. In this work, we report that the food pathogen Listeria monocytogenes can rapidly develop an elevated tolerance against t-cinnamaldehyde, a natural antimicrobial from cinnamon, by single base pair changes in the yhfK gene. The enzyme encoded by this gene is an oxidoreductase, but its substrates and precise role were hitherto unknown. We demonstrate that the enzyme reduces the double bond in t-cinnamaldehyde and thereby abolishes its antibacterial activity. Furthermore, the mutations linked to t-CIN tolerance increased bacterial sensitivity to a related compound, suggesting that they modify the substrate specificity of the enzyme. Since the family of oxidoreductases to which YhfK belongs is of great interest in the mediation of stereospecific reactions in biocatalysis, our work may also have unanticipated application potential in this field.
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Affiliation(s)
- Lei Sun
- Department of Microbial and Molecular Systems and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium
| | - Ann Van Loey
- Department of Microbial and Molecular Systems and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium
| | - Carolien Buvé
- Department of Microbial and Molecular Systems and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium
| | - Chris W. Michiels
- Department of Microbial and Molecular Systems and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Leuven, Belgium
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13
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Panaccione DG. Derivation of the multiply-branched ergot alkaloid pathway of fungi. Microb Biotechnol 2023; 16:742-756. [PMID: 36636806 PMCID: PMC10034635 DOI: 10.1111/1751-7915.14214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 12/16/2022] [Accepted: 01/02/2023] [Indexed: 01/14/2023] Open
Abstract
Ergot alkaloids are a large family of fungal specialized metabolites that are important as toxins in agriculture and as the foundation of powerful pharmaceuticals. Fungi from several lineages and diverse ecological niches produce ergot alkaloids from at least one of several branches of the ergot alkaloid pathway. The biochemical and genetic bases for the different branches have been established and are summarized briefly herein. Several pathway branches overlap among fungal lineages and ecological niches, indicating activities of ergot alkaloids benefit fungi in different environments and conditions. Understanding the functions of the multiple genes in each branch of the pathway allows researchers to parse the abundant genomic sequence data available in public databases in order to assess the ergot alkaloid biosynthesis capacity of previously unexplored fungi. Moreover, the characterization of the genes involved in the various branches provides opportunities and resources for the biotechnological manipulation of ergot alkaloids for experimentation and pharmaceutical development.
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Affiliation(s)
- Daniel G Panaccione
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, USA
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14
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Breukelaar W, Polidori N, Singh A, Daniel B, Glueck SM, Gruber K, Kroutil W. Mechanistic Insights into the Ene-Reductase-Catalyzed Promiscuous Reduction of Oximes to Amines. ACS Catal 2023; 13:2610-2618. [PMID: 36846821 PMCID: PMC9942197 DOI: 10.1021/acscatal.2c06137] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/18/2023] [Indexed: 02/08/2023]
Abstract
The biocatalytic reduction of the oxime moiety to the corresponding amine group has only recently been found to be a promiscuous activity of ene-reductases transforming α-oximo β-keto esters. However, the reaction pathway of this two-step reduction remained elusive. By studying the crystal structures of enzyme oxime complexes, analyzing molecular dynamics simulations, and investigating biocatalytic cascades and possible intermediates, we obtained evidence that the reaction proceeds via an imine intermediate and not via the hydroxylamine intermediate. The imine is reduced further by the ene-reductase to the amine product. Remarkably, a non-canonical tyrosine residue was found to contribute to the catalytic activity of the ene-reductase OPR3, protonating the hydroxyl group of the oxime in the first reduction step.
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Affiliation(s)
- Willem
B. Breukelaar
- Department
of Chemistry, NAWI Graz, University of Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Nakia Polidori
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstraße 50, 8010 Graz, Austria
| | - Amit Singh
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstraße 50, 8010 Graz, Austria
| | - Bastian Daniel
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstraße 50, 8010 Graz, Austria
| | - Silvia M. Glueck
- Department
of Chemistry, NAWI Graz, University of Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Karl Gruber
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstraße 50, 8010 Graz, Austria,Field
of Excellence BioHealth, University of Graz, 8010 Graz, Austria,BioTechMed
Graz, 8010 Graz, Austria,
| | - Wolfgang Kroutil
- Department
of Chemistry, NAWI Graz, University of Graz, Heinrichstraße 28, 8010 Graz, Austria,Field
of Excellence BioHealth, University of Graz, 8010 Graz, Austria,BioTechMed
Graz, 8010 Graz, Austria,
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15
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Böhmer S, Marx C, Goss R, Gilbert M, Sasso S, Happe T, Hemschemeier A. Chlamydomonas reinhardtii mutants deficient for Old Yellow Enzyme 3 exhibit increased photooxidative stress. PLANT DIRECT 2023; 7:e480. [PMID: 36685735 PMCID: PMC9840898 DOI: 10.1002/pld3.480] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 11/14/2022] [Accepted: 12/31/2022] [Indexed: 05/12/2023]
Abstract
Old Yellow Enzymes (OYEs) are flavin-containing ene-reductases that have been intensely studied with regard to their biotechnological potential for sustainable chemical syntheses. OYE-encoding genes are found throughout the domains of life, but their physiological role is mostly unknown, one reason for this being the promiscuity of most ene-reductases studied to date. The unicellular green alga Chlamydomonas reinhardtii possesses four genes coding for OYEs, three of which we have analyzed biochemically before. Ene-reductase CrOYE3 stood out in that it showed an unusually narrow substrate scope and converted N-methylmaleimide (NMI) with high rates. This was recapitulated in a C. reinhardtii croye3 mutant that, in contrast to the wild type, hardly degraded externally added NMI. Here we show that CrOYE3-mediated NMI conversion depends on electrons generated photosynthetically by photosystem II (PSII) and that the croye3 mutant exhibits slightly decreased photochemical quenching in high light. Non-photochemical quenching is strongly impaired in this mutant, and it shows enhanced oxidative stress. The phenotypes of the mutant suggest that C. reinhardtii CrOYE3 is involved in the protection against photooxidative stress, possibly by converting reactive carbonyl species derived from lipid peroxides or maleimides from tetrapyrrole degradation.
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Affiliation(s)
- Stefanie Böhmer
- Faculty of Biology and Biotechnology, PhotobiotechnologyRuhr University BochumBochumGermany
| | - Christina Marx
- SolarBioproducts RuhrBusiness Development Agency HerneHerneGermany
| | - Reimund Goss
- Institute of Biology, Plant PhysiologyLeipzig UniversityLeipzigGermany
| | - Matthias Gilbert
- Institute of Biology, Plant PhysiologyLeipzig UniversityLeipzigGermany
| | - Severin Sasso
- Institute of Biology, Plant PhysiologyLeipzig UniversityLeipzigGermany
| | - Thomas Happe
- Faculty of Biology and Biotechnology, PhotobiotechnologyRuhr University BochumBochumGermany
| | - Anja Hemschemeier
- Faculty of Biology and Biotechnology, PhotobiotechnologyRuhr University BochumBochumGermany
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16
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Feng J, Xue Y, Wang J, Xie X, Lu C, Chen H, Lu Y, Zhu L, Chu D, Chen X. Enhancing the asymmetric reduction activity of ene-reductases for the synthesis of a brivaracetam precursor. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.12.036] [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: 01/01/2023]
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17
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Singh Y, Sharma R, Mishra M, Verma PK, Saxena AK. Crystal structure of ArOYE6 reveals a novel C‐terminal helical extension and mechanistic insights into the distinct class III OYEs from pathogenic fungi. FEBS J 2022; 289:5531-5550. [DOI: 10.1111/febs.16445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 03/02/2022] [Accepted: 03/18/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Yeshveer Singh
- Plant Immunity Laboratory National Institute of Plant Genome Research New Delhi India
| | - Ruby Sharma
- Rm‐403/440 Structural Biology Laboratory School of Life Science Jawaharlal Nehru University New Delhi India
| | - Manasi Mishra
- Plant Immunity Laboratory National Institute of Plant Genome Research New Delhi India
| | - Praveen Kumar Verma
- Plant Immunity Laboratory National Institute of Plant Genome Research New Delhi India
- Plant Immunity Laboratory School of Life Science Jawaharlal Nehru University New Delhi India
| | - Ajay Kumar Saxena
- Rm‐403/440 Structural Biology Laboratory School of Life Science Jawaharlal Nehru University New Delhi India
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18
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Papadopoulou A, Peters C, Borchert S, Steiner K, Buller R. Development of an Ene Reductase-Based Biocatalytic Process for the Production of Flavor Compounds. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Athena Papadopoulou
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Department of Life Sciences and Facility Management, Zurich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Christin Peters
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Department of Life Sciences and Facility Management, Zurich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Sonja Borchert
- Firmenich SA, Rue de la Bergère 7, 1242 Satigny, Switzerland
| | - Kerstin Steiner
- Firmenich SA, Rue de la Bergère 7, 1242 Satigny, Switzerland
| | - Rebecca Buller
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Department of Life Sciences and Facility Management, Zurich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
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19
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Robescu MS, Cendron L, Bacchin A, Wagner K, Reiter T, Janicki I, Merusic K, Illek M, Aleotti M, Bergantino E, Hall M. Asymmetric Proton Transfer Catalysis by Stereocomplementary Old Yellow Enzymes for C═C Bond Isomerization Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Marina S. Robescu
- Department of Biology, University of Padova, Padova, Province of Padova 35131, Italy
| | - Laura Cendron
- Department of Biology, University of Padova, Padova, Province of Padova 35131, Italy
| | - Arianna Bacchin
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Karla Wagner
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Tamara Reiter
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Ignacy Janicki
- Department of Heteroorganic Chemistry, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Lodz Province 90-001, Poland
| | - Kemal Merusic
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Maximilian Illek
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Matteo Aleotti
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
| | - Elisabetta Bergantino
- Department of Biology, University of Padova, Padova, Province of Padova 35131, Italy
| | - Mélanie Hall
- Institute of Chemistry, University of Graz, Graz, Styria 8010, Austria
- Field of Excellence BioHealth, University of Graz, Graz, Styria 8010, Austria
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20
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Křen V, Kroutil W, Hall M. A Career in Biocatalysis: Kurt Faber. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Křen
- Institute of Microbiology, Czech Academy of Sciences, Laboratory of Biotransformation, 14220 Prague, Czech Republic
| | - Wolfgang Kroutil
- Institute of Chemistry, University of Graz, 8010 Graz, Austria
- Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria
- BioTechMed, University of Graz, 8010 Graz, Austria
| | - Mélanie Hall
- Institute of Chemistry, University of Graz, 8010 Graz, Austria
- Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria
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21
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Zhou L, Ouyang Y, Kong W, Ma T, Zhao H, Jiang Y, Gao J, Ma L. One pot purification and co-immobilization of His-tagged old yellow enzyme and glucose dehydrogenase for asymmetric hydrogenation. Enzyme Microb Technol 2022; 156:110001. [DOI: 10.1016/j.enzmictec.2022.110001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/20/2022] [Accepted: 01/30/2022] [Indexed: 11/27/2022]
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22
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Reeve HA, Nicholson J, Altaf F, Lonsdale TH, Preissler J, Lauterbach L, Lenz O, Leimkühler S, Hollmann F, Paul CE, Vincent KA. A hydrogen-driven biocatalytic approach to recycling synthetic analogues of NAD(P)H. Chem Commun (Camb) 2022; 58:10540-10543. [DOI: 10.1039/d2cc02411j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Soluble hydrogenase enables atom efficient, H2-driven, recycling of synthetic nicotinamide cofactors.
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Affiliation(s)
- Holly A. Reeve
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Jake Nicholson
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Farieha Altaf
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Thomas H. Lonsdale
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Janina Preissler
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Lars Lauterbach
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
- RWTH Aachen University iAMB – Institute of Applied Microbiology Worringer Weg 1, 52074 Aachen, Germany
| | - Oliver Lenz
- Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Silke Leimkühler
- Department of Molecular Enzymology, Institute of Biochemistry and Biology, University of Potsdam, Germany
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Caroline E. Paul
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands
| | - Kylie A. Vincent
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
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23
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Jongkind EPJ, Fossey‐Jouenne A, Mayol O, Zaparucha A, Vergne‐Vaxelaire C, Paul CE. Synthesis of Chiral Amines via a Bi‐Enzymatic Cascade Using an Ene‐Reductase and Amine Dehydrogenase. ChemCatChem 2021. [DOI: 10.1002/cctc.202101576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ewald P. J. Jongkind
- Biocatalysis Department of Biotechnology Delft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
| | - Aurélie Fossey‐Jouenne
- Génomique Métabolique Genoscope Institut François Jacob CEA CNRS Univ Evry Université Paris-Saclay 2 rue Gaston Crémieux 91057 Evry France
| | - Ombeline Mayol
- Génomique Métabolique Genoscope Institut François Jacob CEA CNRS Univ Evry Université Paris-Saclay 2 rue Gaston Crémieux 91057 Evry France
| | - Anne Zaparucha
- Génomique Métabolique Genoscope Institut François Jacob CEA CNRS Univ Evry Université Paris-Saclay 2 rue Gaston Crémieux 91057 Evry France
| | - Carine Vergne‐Vaxelaire
- Génomique Métabolique Genoscope Institut François Jacob CEA CNRS Univ Evry Université Paris-Saclay 2 rue Gaston Crémieux 91057 Evry France
| | - Caroline E. Paul
- Biocatalysis Department of Biotechnology Delft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands
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24
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Tan Z, Han Y, Fu Y, Zhang X, Xu M, Na Q, Zhuang W, Qu X, Ying H, Zhu C. Investigating the Structure‐Reactivity Relationships Between Nicotinamide Coenzyme Biomimetics and Pentaerythritol Tetranitrate Reductase. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Zhuotao Tan
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Yaoying Han
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Yaping Fu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Xiaowang Zhang
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Mengjiao Xu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Qi Na
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Wei Zhuang
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Xudong Qu
- School of Life Sciences and Biotechnology Shanghai Jiao Tong University 200240 Shanghai People's Republic of China
| | - Hanjie Ying
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
| | - Chenjie Zhu
- College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University 211816 Nanjing People's Republic of China
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25
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Hall M. Enzymatic strategies for asymmetric synthesis. RSC Chem Biol 2021; 2:958-989. [PMID: 34458820 PMCID: PMC8341948 DOI: 10.1039/d1cb00080b] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/28/2021] [Indexed: 12/13/2022] Open
Abstract
Enzymes, at the turn of the 21st century, are gaining a momentum. Especially in the field of synthetic organic chemistry, a broad variety of biocatalysts are being applied in an increasing number of processes running at up to industrial scale. In addition to the advantages of employing enzymes under environmentally friendly reaction conditions, synthetic chemists are recognizing the value of enzymes connected to the exquisite selectivity of these natural (or engineered) catalysts. The use of hydrolases in enantioselective protocols paved the way to the application of enzymes in asymmetric synthesis, in particular in the context of biocatalytic (dynamic) kinetic resolutions. After two decades of impressive development, the field is now mature to propose a panel of catalytically diverse enzymes for (i) stereoselective reactions with prochiral compounds, such as double bond reduction and bond forming reactions, (ii) formal enantioselective replacement of one of two enantiotopic groups of prochiral substrates, as well as (iii) atroposelective reactions with noncentrally chiral compounds. In this review, the major enzymatic strategies broadly applicable in the asymmetric synthesis of optically pure chiral compounds are presented, with a focus on the reactions developed within the past decade.
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Affiliation(s)
- Mélanie Hall
- Institute of Chemistry, University of Graz Heinrichstrasse 28 8010 Graz Austria
- Field of Excellence BioHealth - University of Graz Austria
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26
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Sandoval BA, Clayman PD, Oblinsky DG, Oh S, Nakano Y, Bird M, Scholes GD, Hyster TK. Photoenzymatic Reductions Enabled by Direct Excitation of Flavin-Dependent “Ene”-Reductases. J Am Chem Soc 2020; 143:1735-1739. [DOI: 10.1021/jacs.0c11494] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Braddock A. Sandoval
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
| | - Phillip D. Clayman
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
| | - Daniel G. Oblinsky
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
| | - Seokjoon Oh
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Yuji Nakano
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
| | - Matthew Bird
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Gregory D. Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
| | - Todd K. Hyster
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 United States
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27
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An C, Shaw MH, Tharp A, Verma D, Li H, Wang H, Wang X. Enantioselective Enzymatic Reduction of Acrylic Acids. Org Lett 2020; 22:8320-8325. [PMID: 33048553 DOI: 10.1021/acs.orglett.0c02959] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An ene-reductase (ERED 36) with broad substrate specificity was identified, and optimization studies led to the development of an enzymatic protocol for the reduction of α,β-unsaturated acids under mild, aqueous conditions. The substrate scope includes aromatic- and aliphatic-substituted acrylic acids, as well as cyclic α,β-substituted acrylic acids, yielding chiral α-substituted acids with exquisite levels of enantioselectivity (>99% ee).
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Affiliation(s)
- Chihui An
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Megan H Shaw
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Annika Tharp
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Deeptak Verma
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Hongming Li
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Heather Wang
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Xiao Wang
- Department of Process Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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28
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Venturi S, Brenna E, Colombo D, Fraaije MW, Gatti FG, Macchi P, Monti D, Trajkovic M, Zamboni E. Multienzymatic Stereoselective Reduction of Tetrasubstituted Cyclic Enones to Halohydrins with Three Contiguous Stereogenic Centers. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04097] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Silvia Venturi
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
| | - Elisabetta Brenna
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
| | - Danilo Colombo
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
| | - Marco W. Fraaije
- Molecular Enzymology Group, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Francesco G. Gatti
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
| | - Piero Macchi
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
| | - Daniela Monti
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), C.N.R., Via Mario Bianco, 9, Milano 20131, Italy
| | - Milos Trajkovic
- Molecular Enzymology Group, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Emilio Zamboni
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica ”G. Natta”, Politecnico di Milano, P.zza Leonardo da Vinci 32, Milano 20133, Italy
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29
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Clayman PD, Hyster TK. Photoenzymatic Generation of Unstabilized Alkyl Radicals: An Asymmetric Reductive Cyclization. J Am Chem Soc 2020; 142:15673-15677. [PMID: 32857506 DOI: 10.1021/jacs.0c07918] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Flavin-dependent "ene"-reductases can generate stabilized alkyl radicals when irradiated with visible light; however, they are not known to form unstabilized radicals. Here, we report an enantioselective radical cyclization using alkyl iodides as precursors to unstabilized nucleophilic radicals. Evidence suggests this species is accessed by photoexcitation of a charge-transfer complex that forms between flavin and substrate within the protein active site. Stereoselective delivery of a hydrogen atom from the flavin semiquinone to the prochiral radical formed after cyclization provides high levels of enantioselectivity across a variety of substrates. Overall, this transformation demonstrates that photoenzymatic catalysis can address long-standing selectivity challenges in the radical literature.
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Affiliation(s)
- Phillip D Clayman
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Todd K Hyster
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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30
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Abstract
Flavoenzymes are broadly employed as biocatalysts for a large variety of reactions, owing to the chemical versatility of the flavin cofactor. Oxidases set aside, many flavoenzymes require a source of electrons in form of the biological reductant nicotinamide NAD(P)H in order to initiate catalysis via the reduced flavin. Chemists can take advantage of the reactivity of reduced flavins with oxygen to carry out monooxygenation reactions, while the reduced flavin can also be used for formal hydrogenation reactions. The main advantage of these reactions compared to chemical approaches is the frequent regio-, chemo- and stereo-selectivity of the biocatalysts, which allows the synthesis of chiral molecules in optically active form. This chapter provides an overview of the variety of biocatalytic processes that have been developed with flavoenzymes, with a particular focus on nicotinamide-dependent enzymes. The diversity of molecules obtained is highlighted and in several cases, strategies that allow control of the stereochemical outcome of the reactions are reviewed.
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Affiliation(s)
- Mélanie Hall
- Department of Chemistry, University of Graz, Graz, Austria.
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31
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Thermal, electrochemical and photochemical reactions involving catalytically versatile ene reductase enzymes. Enzymes 2020; 47:491-515. [PMID: 32951833 DOI: 10.1016/bs.enz.2020.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Successful exploitation of biocatalytic processes employing flavoproteins requires the implementation of cost-effective solutions to circumvent the need to supply costly nicotinamide coenzymes as reducing equivalents. Chemical syntheses harnessing the power of the flavoprotein ene reductases will likely increase the range and/or optical purity of available fine chemicals and pharmaceuticals due to their ability to catalyze asymmetric bioreductions. This review will outline current progress in the design of alternative routes to ene reductase flavin activation, most notably within the Old Yellow Enzyme family. A variety of chemical, enzymatic, electrochemical and photocatalytic routes have been employed, designed to eliminate the need for nicotinamide coenzymes or provide cost-effective alternatives to efficient recycling. Photochemical approaches have also enabled novel mechanistic routes of ene reductases to become available, opening up the possibility of accessing a wider range of non-natural chemical diversity.
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32
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Zetzsche LE, Narayan ARH. Broadening the scope of biocatalytic C-C bond formation. Nat Rev Chem 2020; 4:334-346. [PMID: 34430708 PMCID: PMC8382263 DOI: 10.1038/s41570-020-0191-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2020] [Indexed: 12/18/2022]
Abstract
The impeccable control over chemo-, site-, and stereoselectivity possible in enzymatic reactions has led to a surge in the development of new biocatalytic methods. Despite carbon-carbon (C-C) bonds providing the central framework for organic molecules, development of biocatalytic methods for their formation has been largely confined to the use of a select few lyases over the last several decades, limiting the types of C-C bond-forming transformations possible through biocatalytic methods. This Review provides an update on the suite of enzymes available for highly selective biocatalytic C-C bond formation. Examples will be discussed in reference to the (1) native activity of enzymes, (2) alteration of activity through protein or substrate engineering for broader applicability, and (3) utility of the biocatalyst for abiotic synthesis.
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Affiliation(s)
- Lara E. Zetzsche
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI 48109, USA
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Alison R. H. Narayan
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI 48109, USA
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
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33
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Sandoval BA, Hyster TK. Emerging strategies for expanding the toolbox of enzymes in biocatalysis. Curr Opin Chem Biol 2020; 55:45-51. [PMID: 31935627 PMCID: PMC7769163 DOI: 10.1016/j.cbpa.2019.12.006] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 11/30/2022]
Abstract
Expanding the repertoire of reactions available to enzymes is an enduring challenge in biocatalysis. Owing to the synthetic versatility of transition metals, metalloenzymes have been favored targets for achieving new catalytic functions. Although less well explored, enzymes lacking metal centers can also be effective catalysts for non-natural reactions, providing access to reaction modalities that compliment those available to metals. By understanding how these activation modes can reveal new functions, strategies can be developed to access novel biocatalytic reactions. This review will cover discoveries in the last two years which access catalytic reactions that go beyond the native repertoire of metal-free biocatalysts.
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Affiliation(s)
| | - Todd K Hyster
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA.
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Abstract
Ene-reductases (ERs) belonging to the old yellow enzyme (OYE) family have been thoroughly investigated for the stereospecific reduction of activated prochiral C=C double bonds. In this work, OYE3 was immobilized both by covalent binding on glyoxyl-agarose (OYE3-GA), and by affinity-based adsorption on EziGTM particles (OYE3-EziG). The immobilized OYE3-GA was demonstrated to be active (activity recovery = 52%) and to retain almost 100% of its activity under the enzymatic assay conditions (50 mM phosphate buffer pH 7, 28 °C) for six days, whereas the activity of the non-immobilized enzyme dropped to 50% after two days. In the case of EziGTM, the highest activity recovery (54%) was achieved by using the most hydrophilic carrier (EziGTM Opal) that was selected for the full characterization of this type of enzyme preparation (stability, recycling, re-use, enzyme leakage). OYE3-EziG was slightly less stable than OYE3-GA under the same experimental conditions. OYE3-GA could be recycled and re-used for up to 12 reaction cycles in the bioreduction of α-methyl-trans-cinnamaldehyde; after 12 runs, the highest conversion achieved was 40%. In the case of the co-immobilized OYE3/GDH-EziG, the conversion dropped to 56% after two reaction cycles. No enzyme leakage was detected over 48 h for both OYE3-GA and OYE3/GDH-EziG (50 mM phosphate buffer pH 7, 28 °C). These seed results pave the way for a true optimization of the immobilization of OYE3, as well as for the use of immobilized OYE3 for preparative applications both in batch and continuous flow conditions.
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Abstract
Ene reductases enable the asymmetric hydrogenation of activated alkenes allowing the manufacture of valuable chiral products. The enzymes complement existing metal- and organocatalytic approaches for the stereoselective reduction of activated C=C double bonds, and efforts to expand the biocatalytic toolbox with additional ene reductases are of high academic and industrial interest. Here, we present the characterization of a novel ene reductase from Paenibacillus polymyxa, named Ppo-Er1, belonging to the recently identified subgroup III of the old yellow enzyme family. The determination of substrate scope, solvent stability, temperature, and pH range of Ppo-Er1 is one of the first examples of a detailed biophysical characterization of a subgroup III enzyme. Notably, Ppo-Er1 possesses a wide temperature optimum (Topt: 20–45 °C) and retains high conversion rates of at least 70% even at 10 °C reaction temperature making it an interesting biocatalyst for the conversion of temperature-labile substrates. When assaying a set of different organic solvents to determine Ppo-Er1′s solvent tolerance, the ene reductase exhibited good performance in up to 40% cyclohexane as well as 20 vol% DMSO and ethanol. In summary, Ppo-Er1 exhibited activity for thirteen out of the nineteen investigated compounds, for ten of which Michaelis–Menten kinetics could be determined. The enzyme exhibited the highest specificity constant for maleimide with a kcat/KM value of 287 mM−1 s−1. In addition, Ppo-Er1 proved to be highly enantioselective for selected substrates with measured enantiomeric excess values of 92% or higher for 2-methyl-2-cyclohexenone, citral, and carvone.
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36
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Łużny M, Krzywda M, Kozłowska E, Kostrzewa-Susłow E, Janeczko T. Effective Hydrogenation of 3-(2"-furyl)- and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-prop-2-en-1-one in Selected Yeast Cultures. Molecules 2019; 24:E3185. [PMID: 31480751 PMCID: PMC6749209 DOI: 10.3390/molecules24173185] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 11/18/2022] Open
Abstract
Biotransformations were performed on eight selected yeast strains, all of which were able to selectively hydrogenate the chalcone derivatives 3-(2"-furyl)- (1) and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-prop-2-en-1-one (3) into 3-(2"-furyl)- (2) and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-propan-1-one (4) respectively. The highest efficiency of hydrogenation of the double bond in the substrate 1 was observed in the cultures of Saccharomyces cerevisiae KCh 464 and Yarrowia lipolytica KCh 71 strains. The substrate was converted into the product with > 99% conversion just in six hours after biotransformation started. The compound containing the sulfur atom in its structure was most effectively transformed by the Yarrowia lipolytica KCh 71 culture strain (conversion > 99%, obtained after three hours of substrate incubation). Also, we observed that, different strains of tested yeasts are able to carry out the bioreduction of the used substrate with different yields, depending on the presence of induced and constitutive ene reductases in their cells. The biggest advantage of this process is the efficient production of one product, practically without the formation of side products.
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Affiliation(s)
- Mateusz Łużny
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| | - Martyna Krzywda
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Ewa Kozłowska
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Edyta Kostrzewa-Susłow
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Tomasz Janeczko
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
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37
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Carneiro ZA, Lima JC, Lopes CD, Gaspari APS, de Albuquerque S, Dinelli LR, Veloso-Silva LLW, Paganelli MO, Libardi SH, Oliveira CG, Deflon VM, Oliveira RJ, Borges JC, Maia PIS. Heterobimetallic nickel(II) and palladium(II) complexes derived from S-benzyl-N- (ferrocenyl)methylenedithiocarbazate: Trypanocidal activity and interaction with Trypanosoma cruzi Old Yellow Enzyme (TcOYE). Eur J Med Chem 2019; 180:213-223. [PMID: 31306908 DOI: 10.1016/j.ejmech.2019.07.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/10/2019] [Accepted: 07/04/2019] [Indexed: 10/26/2022]
Abstract
Reactions of Ni(II) and Pd(II) precursors with S-benzyl-N-(ferrocenyl)methylenedithiocarbazate (HFedtc) led to the formation of heterobimetallic complexes of the type [MII(Fedtc)2] (M = Ni and Pd). The characterization of the compounds involved the determination of melting point, FTIR, UV-Vis, 1H NMR, elemental analysis and electrochemical experiments. Furthermore, the crystalline structures of HFedtc and [NiII(Fedtc)2] were determined by single crystal X-ray diffraction. The compounds were evaluated against the intracellular form of Trypanosoma cruzi (Tulahuen Lac-Z strain) and the cytotoxicity assays were assessed using LLC-MK2 cells. The results showed that the coordination of HFedtc to Ni(II) or Pd(II) decreases the in vitro trypanocidal activity while the cytotoxicity against LLC-MK2 cells does not change significantly. [PdII(Fedtc)2] showed the greater potential between the two complexes studied, showing an SI value of 8.9. However, this value is not better than that of the free ligand with an SI of 40, a similar value to that of the standard drug benznidazole (SI = 48). Additionally, molecular docking simulations were performed with Trypanosoma cruzi Old Yellow Enzyme (TcOYE), which predicted that HFedtc binds to the protein, almost parallel to the flavin mononucleotide (FMN) prosthetic group, while the [NiII(Fedtc)2] complex was docked into the enzyme binding site in a significantly different manner. In order to confirm the hypothetical interaction, in vitro experiments of fluorescence quenching and enzymatic activity were performed which indicated that, although HFedtc was not processed by the enzyme, it was able to act as a competitive inhibitor, blocking the hydride transfer from the FMN prosthetic group of the enzyme to the menadione substrate.
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Affiliation(s)
- Zumira A Carneiro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Jackelinne C Lima
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Ana P S Gaspari
- Instituto Federal do Paraná - Campus Paranavaí, Av. José Felipe Tequinha, 1400, 87703-536, Paranavaí, PR, Brazil
| | - Sergio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Luis R Dinelli
- Faculdade de Ciências Integrada do Pontal, Universidade Federal de Uberlândia, Rua vinte, 1600, 38304-402, Ituiutaba, MG, Brazil
| | - Laudimir L W Veloso-Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Marcella O Paganelli
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Silvia H Libardi
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Carolina G Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, 38400-902, Uberlândia, MG, Brazil
| | - Victor M Deflon
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Ronaldo J Oliveira
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Júlio C Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Pedro I S Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil.
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38
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Sandoval BA, Kurtoic SI, Chung MM, Biegasiewicz KF, Hyster TK. Photoenzymatic Catalysis Enables Radical-Mediated Ketone Reduction in Ene-Reductases. Angew Chem Int Ed Engl 2019; 58:8714-8718. [PMID: 30951226 PMCID: PMC6570536 DOI: 10.1002/anie.201902005] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/22/2019] [Indexed: 11/12/2022]
Abstract
Flavin-dependent ene-reductases (EREDs) are known to stereoselectively reduce activated alkenes, but are inactive toward carbonyls. Demonstrated here is that in the presence of photoredox catalysts, these enzymes will reduce aromatic ketones. Mechanistic experiments suggest this reaction proceeds through ketyl radical formation, a reaction pathway that is distinct from the native hydride-transfer mechanism. Furthermore, this reactivity is accessible without modification of either the enzyme or cofactors, allowing both native and non-natural mechanisms to occur simultaneously. Based on control experiments, we hypothesize that binding to the enzyme active site attenuates the reduction potential of the substrate, enabling single-electron reduction. This reactivity highlights opportunities to access new catalytic manifolds by merging photoredox catalysis with biocatalysis.
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Affiliation(s)
- Braddock A Sandoval
- Department of Chemistry, Princeton University, Frick Chemical Laboratory, Princeton, NJ, 08544, USA
| | - Sarah I Kurtoic
- Department of Chemistry, Princeton University, Frick Chemical Laboratory, Princeton, NJ, 08544, USA
| | - Megan M Chung
- Department of Chemistry, Princeton University, Frick Chemical Laboratory, Princeton, NJ, 08544, USA
| | - Kyle F Biegasiewicz
- Department of Chemistry, Princeton University, Frick Chemical Laboratory, Princeton, NJ, 08544, USA
| | - Todd K Hyster
- Department of Chemistry, Princeton University, Frick Chemical Laboratory, Princeton, NJ, 08544, USA
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39
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Peters C, Buller R. Linear enzyme cascade for the production of (-)-iso-isopulegol. ACTA ACUST UNITED AC 2019; 74:63-70. [PMID: 30645192 DOI: 10.1515/znc-2018-0146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/09/2018] [Indexed: 01/31/2023]
Abstract
Biocatalysis has developed enormously in the last decade and now offers solutions for the sustainable production of chiral and highly functionalised asset molecules. Products generated by enzymatic transformations are already being used in the food, feed, chemical, pharmaceutical and cosmetic industry, and the accessible compound panoply is expected to expand even further. In particular, the combination of stereo-selective enzymes in linear cascade reactions is an elegant strategy toward enantiomeric pure compounds, as it reduces the number of isolation and purification steps and avoids accumulation of potentially unstable intermediates. Here, we present the set-up of an enzyme cascade to selectively convert citral to (-)-iso-isopulegol by combining an ene reductase and a squalene hopene cyclase. In the initial reaction step, the ene reductase YqjM from Bacillus subtilis selectively transforms citral to (S)-citronellal, which is subsequently cyclised exclusively to (-)-iso-isopulegol by a mutant of the squalene hopene cyclase from Alicyclobacillus acidocaldarius (AacSHC). With this approach, we can convert citral to an enantiopure precursor for isomenthol derivatives.
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Affiliation(s)
- Christin Peters
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Zürich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Rebecca Buller
- Competence Center for Biocatalysis, Institute of Chemistry and Biotechnology, Zürich University of Applied Sciences, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
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40
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Sandoval BA, Kurtoic SI, Chung MM, Biegasiewicz KF, Hyster TK. Photoenzymatic Catalysis Enables Radical‐Mediated Ketone Reduction in Ene‐Reductases. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Braddock A. Sandoval
- Department of ChemistryPrinceton UniversityFrick Chemical Laboratory Princeton NJ 08544 USA
| | - Sarah I. Kurtoic
- Department of ChemistryPrinceton UniversityFrick Chemical Laboratory Princeton NJ 08544 USA
| | - Megan M. Chung
- Department of ChemistryPrinceton UniversityFrick Chemical Laboratory Princeton NJ 08544 USA
| | - Kyle F. Biegasiewicz
- Department of ChemistryPrinceton UniversityFrick Chemical Laboratory Princeton NJ 08544 USA
| | - Todd K. Hyster
- Department of ChemistryPrinceton UniversityFrick Chemical Laboratory Princeton NJ 08544 USA
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41
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Peters C, Frasson D, Sievers M, Buller R. Novel Old Yellow Enzyme Subclasses. Chembiochem 2019; 20:1569-1577. [DOI: 10.1002/cbic.201800770] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/12/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Christin Peters
- Competence Center for BiocatalysisInstitute of Chemistry and BiotechnologySchool of Life Sciences and Facility ManagementZurich University of Applied Sciences Einsiedlerstrasse 31 8820 Wädenswil Switzerland
| | - David Frasson
- Molecular BiologyInstitute of Chemistry and BiotechnologySchool of Life Sciences and Facility ManagementZurich University of Applied Sciences Einsiedlerstrasse 31 8820 Wädenswil Switzerland
| | - Martin Sievers
- Molecular BiologyInstitute of Chemistry and BiotechnologySchool of Life Sciences and Facility ManagementZurich University of Applied Sciences Einsiedlerstrasse 31 8820 Wädenswil Switzerland
| | - Rebecca Buller
- Competence Center for BiocatalysisInstitute of Chemistry and BiotechnologySchool of Life Sciences and Facility ManagementZurich University of Applied Sciences Einsiedlerstrasse 31 8820 Wädenswil Switzerland
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42
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Mähler C, Kratzl F, Vogel M, Vinnenberg S, Weuster‐Botz D, Castiglione K. Loop Swapping as a Potent Approach to Increase Ene Reductase Activity with Nicotinamide Adenine Dinucleotide (NADH). Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Christoph Mähler
- Technical University of MunichInstitute of Biochemical Engineering Boltzmannstr. 15 D-85748 Garching Germany
| | - Franziska Kratzl
- Technical University of MunichInstitute of Biochemical Engineering Boltzmannstr. 15 D-85748 Garching Germany
| | - Melina Vogel
- Technical University of MunichInstitute of Biochemical Engineering Boltzmannstr. 15 D-85748 Garching Germany
| | - Stefan Vinnenberg
- Technical University of MunichInstitute of Biochemical Engineering Boltzmannstr. 15 D-85748 Garching Germany
| | - Dirk Weuster‐Botz
- Technical University of MunichInstitute of Biochemical Engineering Boltzmannstr. 15 D-85748 Garching Germany
| | - Kathrin Castiglione
- Friedrich-Alexander-University Erlangen-NürnbergInstitute of Bioprocess Engineering Paul-Gordan-Str. 3 D-91052 Erlangen Germany
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Abstract
The diverse chemistry possible with flavin cofactors positions flavin-dependent enzymes as versatile synthetic tools. This focused review highlights applications of flavin-dependent enzymes in organic synthesis. Select examples of monoamine oxidases, ene-reductases, monooxygenases and halogenases in target-oriented synthesis are presented.
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Affiliation(s)
- Summer A. Baker Dockrey
- Department of Chemistry, University of Michigan, Ann Arbor Michigan, 48109
- Life Sciences Institute, University of Michigan, Ann Arbor Michigan, 48109
| | - Alison R. H. Narayan
- Department of Chemistry, University of Michigan, Ann Arbor Michigan, 48109
- Life Sciences Institute, University of Michigan, Ann Arbor Michigan, 48109
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Scholtissek A, Gädke E, Paul CE, Westphal AH, van Berkel WJH, Tischler D. Catalytic Performance of a Class III Old Yellow Enzyme and Its Cysteine Variants. Front Microbiol 2018; 9:2410. [PMID: 30369915 PMCID: PMC6194350 DOI: 10.3389/fmicb.2018.02410] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/20/2018] [Indexed: 11/21/2022] Open
Abstract
Class III old yellow enzymes (OYEs) contain a conserved cysteine in their active sites. To address the role of this cysteine in OYE-mediated asymmetric synthesis, we have studied the biocatalytic properties of OYERo2a from Rhodococcus opacus 1CP (WT) as well as its engineered variants C25A, C25S and C25G. OYERo2a in its redox resting state (oxidized form) is irreversibly inactivated by N-methylmaleimide. As anticipated, inactivation does not occur with the Cys variants. Steady-state kinetics with this maleimide substrate revealed that C25S and C25G doubled the turnover frequency (k cat) while showing increased K M values compared to WT, and that C25A performed more similar to WT. Applying the substrate 2-cyclohexen-1-one, the Cys variants were less active and less efficient than WT. OYERo2a and its Cys variants showed different activities with NADPH, the natural reductant. The variants did bind NADPH less well but k cat was significantly increased. The most efficient variant was C25G. Replacement of NADPH with the cost-effective synthetic cofactor 1-benzyl-1,4-dihydronicotinamide (BNAH) drastically changed the catalytic behavior. Again C25G was most active and showed a similar efficiency as WT. Biocatalysis experiments showed that OYERo2a, C25S, and C25G converted N-phenyl-2-methylmaleimide equally well (81-84%) with an enantiomeric excess (ee) of more than 99% for the R-product. With cyclic ketones, the highest conversion (89%) and ee (>99%) was observed for the reaction of WT with R-carvone. A remarkable poor conversion of cyclic ketones occurred with C25G. In summary, we established that the generation of a cysteine-free enzyme and cofactor optimization allows the development of more robust class III OYEs.
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Affiliation(s)
- Anika Scholtissek
- Environmental Microbiology Group, Interdisciplinary Ecological Center, Institute of Biosciences, Technical University Bergakademie Freiberg, Freiberg, Germany
| | - Eric Gädke
- Environmental Microbiology Group, Interdisciplinary Ecological Center, Institute of Biosciences, Technical University Bergakademie Freiberg, Freiberg, Germany
- Microbial Biotechnology, Department of Biology and Biotechnology, Ruhr-University Bochum, Bochum, Germany
| | - Caroline E. Paul
- Laboratory of Organic Chemistry, Wageningen University and Research, Wageningen, Netherlands
- Department of Biotechnology, Delft University of Technology, Delft, Netherlands
| | - Adrie H. Westphal
- Laboratory of Biochemistry, Wageningen University and Research, Wageningen, Netherlands
| | | | - Dirk Tischler
- Microbial Biotechnology, Department of Biology and Biotechnology, Ruhr-University Bochum, Bochum, Germany
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45
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Heckenbichler K, Schweiger A, Brandner LA, Binter A, Toplak M, Macheroux P, Gruber K, Breinbauer R. Asymmetric Reductive Carbocyclization Using Engineered Ene Reductases. Angew Chem Int Ed Engl 2018; 57:7240-7244. [PMID: 29689601 PMCID: PMC6033016 DOI: 10.1002/anie.201802962] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 01/14/2023]
Abstract
Ene reductases from the Old Yellow Enzyme (OYE) family reduce the C=C double bond in α,β-unsaturated compounds bearing an electron-withdrawing group, for example, a carbonyl group. This asymmetric reduction has been exploited for biocatalysis. Going beyond its canonical function, we show that members of this enzyme family can also catalyze the formation of C-C bonds. α,β-Unsaturated aldehydes and ketones containing an additional electrophilic group undergo reductive cyclization. Mechanistically, the two-electron-reduced enzyme cofactor FMN delivers a hydride to generate an enolate intermediate, which reacts with the internal electrophile. Single-site replacement of a crucial Tyr residue with a non-protic Phe or Trp favored the cyclization over the natural reduction reaction. The new transformation enabled the enantioselective synthesis of chiral cyclopropanes in up to >99 % ee.
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Affiliation(s)
- Kathrin Heckenbichler
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Anna Schweiger
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Lea Alexandra Brandner
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Alexandra Binter
- Institute of BiochemistryGraz University of TechnologyPetersgasse 10–128010GrazAustria
- Austrian Centre of Industrial Biotechnology (ACIB)Petersgasse 148010GrazAustria
| | - Marina Toplak
- Institute of BiochemistryGraz University of TechnologyPetersgasse 10–128010GrazAustria
| | - Peter Macheroux
- Institute of BiochemistryGraz University of TechnologyPetersgasse 10–128010GrazAustria
| | - Karl Gruber
- Austrian Centre of Industrial Biotechnology (ACIB)Petersgasse 148010GrazAustria
- Institute of Molecular BiosciencesUniversity of GrazHumboldtstraße 508010GrazAustria
| | - Rolf Breinbauer
- Institute of Organic ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
- Austrian Centre of Industrial Biotechnology (ACIB)Petersgasse 148010GrazAustria
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Heckenbichler K, Schweiger A, Brandner LA, Binter A, Toplak M, Macheroux P, Gruber K, Breinbauer R. Asymmetrische reduktive Carbocyclisierung durch modifizierte En-Reduktasen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802962] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kathrin Heckenbichler
- Institut für Organische Chemie; Technische Universität Graz; Stremayrgasse 9 8010 Graz Österreich
| | - Anna Schweiger
- Institut für Organische Chemie; Technische Universität Graz; Stremayrgasse 9 8010 Graz Österreich
| | - Lea Alexandra Brandner
- Institut für Organische Chemie; Technische Universität Graz; Stremayrgasse 9 8010 Graz Österreich
| | - Alexandra Binter
- Institut für Biochemie; Technische Universität Graz; Petersgasse 10-12 8010 Graz Österreich
- Austrian Centre of Industrial Biotechnology (ACIB); Petersgasse 14 8010 Graz Österreich
| | - Marina Toplak
- Institut für Biochemie; Technische Universität Graz; Petersgasse 10-12 8010 Graz Österreich
| | - Peter Macheroux
- Institut für Biochemie; Technische Universität Graz; Petersgasse 10-12 8010 Graz Österreich
| | - Karl Gruber
- Austrian Centre of Industrial Biotechnology (ACIB); Petersgasse 14 8010 Graz Österreich
- Institut für Molekulare Biowissenschaften; Karl-Franzens-Universität Graz; Humboldtstraße 50 8010 Graz Österreich
| | - Rolf Breinbauer
- Institut für Organische Chemie; Technische Universität Graz; Stremayrgasse 9 8010 Graz Österreich
- Austrian Centre of Industrial Biotechnology (ACIB); Petersgasse 14 8010 Graz Österreich
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47
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The crystal structure of XdpB, the bacterial old yellow enzyme, in an FMN-free form. PLoS One 2018; 13:e0195299. [PMID: 29630677 PMCID: PMC5891007 DOI: 10.1371/journal.pone.0195299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 03/20/2018] [Indexed: 11/19/2022] Open
Abstract
Old Yellow Enzymes (OYEs) are NAD(P)H dehydrogenases of not fully resolved physiological roles that are widespread among bacteria, plants, and fungi and have a great potential for biotechnological applications. We determined the apo form crystal structure of a member of the OYE class, glycerol trinitrate reductase XdpB, from Agrobacterium bohemicum R89-1 at 2.1 Å resolution. In agreement with the structures of the related bacterial OYEs, the structure revealed the TIM barrel fold with an N-terminal β-hairpin lid, but surprisingly, the structure did not contain its cofactor FMN. Its putative binding site was occupied by a pentapeptide TTSDN from the C-terminus of a symmetry related molecule. Biochemical experiments confirmed a specific concentration-dependent oligomerization and a low FMN content. The blocking of the FMN binding site can exist in vivo and regulates enzyme activity. Our bioinformatic analysis indicated that a similar self-inhibition could be expected in more OYEs which we designated as subgroup OYE C1. This subgroup is widespread among G-bacteria and can be recognized by the conserved sequence GxxDYP in proximity of the C termini. In proteobacteria, the C1 subgroup OYEs are typically coded in one operon with short-chain dehydrogenase. This operon is controlled by the tetR-like transcriptional regulator. OYEs coded in these operons are unlikely to be involved in the oxidative stress response as the other known members of the OYE family because no upregulation of XdpB was observed after exposing A. bohemicum R89-1 to oxidative stress.
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48
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In silico and in vitro studies of the reduction of unsaturated α,β bonds of trans-2-hexenedioic acid and 6-amino-trans-2-hexenoic acid - Important steps towards biobased production of adipic acid. PLoS One 2018; 13:e0193503. [PMID: 29474495 PMCID: PMC5825115 DOI: 10.1371/journal.pone.0193503] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/12/2018] [Indexed: 01/31/2023] Open
Abstract
The biobased production of adipic acid, a precursor in the production of nylon, is of great interest in order to replace the current petrochemical production route. Glucose-rich lignocellulosic raw materials have high potential to replace the petrochemical raw material. A number of metabolic pathways have been proposed for the microbial conversion of glucose to adipic acid, but achieved yields and titers remain to be improved before industrial applications are feasible. One proposed pathway starts with lysine, an essential metabolite industrially produced from glucose by microorganisms. However, the drawback of this pathway is that several reactions are involved where there is no known efficient enzyme. By changing the order of the enzymatic reactions, we were able to identify an alternative pathway with one unknown enzyme less compared to the original pathway. One of the reactions lacking known enzymes is the reduction of the unsaturated α,β bond of 6-amino-trans-2-hexenoic acid and trans-2-hexenedioic acid. To identify the necessary enzymes, we selected N-ethylmaleimide reductase from Escherichia coli and Old Yellow Enzyme 1 from Saccharomyces pastorianus. Despite successful in silico docking studies, where both target substrates could fit in the enzyme pockets, and hydrogen bonds with catalytic residues of both enzymes were predicted, no in vitro activity was observed. We hypothesize that the lack of activity is due to a difference in electron withdrawing potential between the naturally reduced aldehyde and the carboxylate groups of our target substrates. Suggestions for protein engineering to induce the reactions are discussed, as well as the advantages and disadvantages of the two metabolic pathways from lysine. We have highlighted bottlenecks associated with the lysine pathways, and proposed ways of addressing them.
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Opperman DJ. Structural investigation into the C-terminal extension of the ene-reductase from Ralstonia (Cupriavidus) metallidurans. Proteins 2017; 85:2252-2257. [PMID: 28833623 DOI: 10.1002/prot.25372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 01/25/2023]
Abstract
Ene-reductases (ERs), or Old Yellow Enzymes, catalyze the asymmetric reduction of various activated alkenes. This class of biocatalysts is considered an attractive alternative to current chemical technologies for hydrogenation due to their high selectivity and specificity. Here the X-ray crystal structure of RmER, a "thermophilic"-like ER from Ralstonia (Cupriavidus) metallidurans, is reported. Unlike other members of this class of ERs, RmER is monomeric in solution which we previously related to its atypical elongated C-terminus. A typical dimer interface was however observed in our crystal structure, with the conserved Arg-"finger" forming part of the adjacent monomer's active site and the elongated C-terminus extending into the active site through contacting the "capping" domain. This dimerization also resulted in the loss of one FMN cofactor from each dimer pair. This potential transient dimerization and dissociation of FMN could conceivably explain the rapid rates previously observed when an FMN light-driven cofactor regeneration system was used during catalysis with RmER.
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Affiliation(s)
- Diederik J Opperman
- Department of Biotechnology, University of the Free State, 205 Nelson Mandela Drive, Bloemfontein, 9300, South Africa
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50
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Sandoval BA, Meichan AJ, Hyster TK. Enantioselective Hydrogen Atom Transfer: Discovery of Catalytic Promiscuity in Flavin-Dependent 'Ene'-Reductases. J Am Chem Soc 2017; 139:11313-11316. [PMID: 28780870 DOI: 10.1021/jacs.7b05468] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Flavin has long been known to function as a single electron reductant in biological settings, but this reactivity has rarely been observed with flavoproteins used in organic synthesis. Here we describe the discovery of an enantioselective radical dehalogenation pathway for α-bromoesters using flavin-dependent 'ene'-reductases. Mechanistic experiments support the role of flavin hydroquinone as a single electron reductant, flavin semiquinone as the hydrogen atom source, and the enzyme as the source of chirality.
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Affiliation(s)
- Braddock A Sandoval
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Andrew J Meichan
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Todd K Hyster
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
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