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Rudzka A, Zdun B, Antos N, Montero LM, Reiter T, Kroutil W, Borowiecki P. Biocatalytic characterization of an alcohol dehydrogenase variant deduced from Lactobacillus kefir in asymmetric hydrogen transfer. Commun Chem 2023; 6:217. [PMID: 37828252 PMCID: PMC10570314 DOI: 10.1038/s42004-023-01013-1] [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: 04/19/2023] [Accepted: 09/26/2023] [Indexed: 10/14/2023] Open
Abstract
Hydrogen transfer biocatalysts to prepare optically pure alcohols are in need, especially when it comes to sterically demanding ketones, whereof the bioreduced products are either essential precursors of pharmaceutically relevant compounds or constitute APIs themselves. In this study, we report on the biocatalytic potential of an anti-Prelog (R)-specific Lactobacillus kefir ADH variant (Lk-ADH-E145F-F147L-Y190C, named Lk-ADH Prince) employed as E. coli/ADH whole-cell biocatalyst and its characterization for stereoselective reduction of prochiral carbonyl substrates. Key enzymatic reaction parameters, including the reaction medium, evaluation of cofactor-dependency, organic co-solvent tolerance, and substrate loading, were determined employing the drug pentoxifylline as a model prochiral ketone. Furthermore, to tap the substrate scope of Lk-ADH Prince in hydrogen transfer reactions, a broad range of 34 carbonylic derivatives was screened. Our data demonstrate that E. coli/Lk-ADH Prince exhibits activity toward a variety of structurally different ketones, furnishing optically active alcohol products at the high conversion of 65-99.9% and in moderate-to-high isolated yields (38-91%) with excellent anti-Prelog (R)-stereoselectivity (up to >99% ee) at substrate concentrations up to 100 mM.
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Affiliation(s)
- Aleksandra Rudzka
- Laboratory of Biocatalysis and Biotransformation, Department of Drugs Technology and Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-662, Warsaw, Poland
| | - Beata Zdun
- Laboratory of Biocatalysis and Biotransformation, Department of Drugs Technology and Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-662, Warsaw, Poland
| | - Natalia Antos
- Laboratory of Biocatalysis and Biotransformation, Department of Drugs Technology and Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-662, Warsaw, Poland
| | - Lia Martínez Montero
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, Field of Excellence BioHealth, Heinrichstrasse 28, 8010, Graz, Austria
| | - Tamara Reiter
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, Field of Excellence BioHealth, Heinrichstrasse 28, 8010, Graz, Austria
| | - Wolfgang Kroutil
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, Field of Excellence BioHealth, Heinrichstrasse 28, 8010, Graz, Austria
| | - Paweł Borowiecki
- Laboratory of Biocatalysis and Biotransformation, Department of Drugs Technology and Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Koszykowa 75, 00-662, Warsaw, Poland.
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2
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Kim HT, Hee Ryu M, Jung YJ, Lim S, Song HM, Park J, Hwang SY, Lee H, Yeon YJ, Sung BH, Bornscheuer UT, Park SJ, Joo JC, Oh DX. Chemo-Biological Upcycling of Poly(ethylene terephthalate) to Multifunctional Coating Materials. CHEMSUSCHEM 2021; 14:4251-4259. [PMID: 34339110 PMCID: PMC8519047 DOI: 10.1002/cssc.202100909] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/30/2021] [Indexed: 05/13/2023]
Abstract
Chemo-biological upcycling of poly(ethylene terephthalate) (PET) developed in this study includes the following key steps: chemo-enzymatic PET depolymerization, biotransformation of terephthalic acid (TPA) into catechol, and its application as a coating agent. Monomeric units were first produced through PET glycolysis into bis(2-hydroxyethyl) terephthalate (BHET), mono(2-hydroxyethyl) terephthalate (MHET), and PET oligomers, and enzymatic hydrolysis of these glycolyzed products using Bacillus subtilis esterase (Bs2Est). Bs2Est efficiently hydrolyzed glycolyzed products into TPA as a key enzyme for chemo-enzymatic depolymerization. Furthermore, catechol solution produced from TPA via a whole-cell biotransformation (Escherichia coli) could be directly used for functional coating on various substrates after simple cell removal from the culture medium without further purification and water-evaporation. This work demonstrates a proof-of-concept of a PET upcycling strategy via a combination of chemo-biological conversion of PET waste into multifunctional coating materials.
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Affiliation(s)
- Hee Taek Kim
- Department of Food Science and TechnologyChungnam National UniversityDaejeon34134 (Republic ofKorea
| | - Mi Hee Ryu
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Ye Jean Jung
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Sooyoung Lim
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Hye Min Song
- Department of Chemical Engineering and Materials ScienceGraduate Program in System Health Science & EngineeringEwha Womans UniversitySeoul03760 (Republic ofKorea
| | - Jeyoung Park
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
| | - Sung Yeon Hwang
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
| | - Hoe‐Suk Lee
- Department of Biochemical EngineeringGangneung-Wonju National UniversityGangneung-siGangwon-do25457 (Republic ofKorea
| | - Young Joo Yeon
- Department of Biochemical EngineeringGangneung-Wonju National UniversityGangneung-siGangwon-do25457 (Republic ofKorea
| | - Bong Hyun Sung
- Synthetic Biology and Bioengineering Research CenterKorea Research Institute of Bioscience and BiotechnologyDaejeon34141 (Republic ofKorea
| | - Uwe T. Bornscheuer
- Department of Biotechnology & Enzyme CatalysisInstitute of BiochemistryUniversity of Greifswald17487GreifswaldGermany
| | - Si Jae Park
- Department of Chemical Engineering and Materials ScienceGraduate Program in System Health Science & EngineeringEwha Womans UniversitySeoul03760 (Republic ofKorea
| | - Jeong Chan Joo
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Department of BiotechnologyThe Catholic University of KoreaBucheon-siGyeonggi-do14662 (Republic ofKorea
| | - Dongyeop X. Oh
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
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3
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Dias Gomes M, Bommarius BR, Anderson SR, Feske BD, Woodley JM, Bommarius AS. Bubble Column Enables Higher Reaction Rate for Deracemization of (
R,S
)‐1‐Phenylethanol with Coupled Alcohol Dehydrogenase/NADH Oxidase System. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900213] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mafalda Dias Gomes
- Department of Chemical and Biochemical Engineering Technical University of Denmark Building 229, Søltofts Plads DK-2800 Kgs. Lyngby Denmark
| | - Bettina R. Bommarius
- School of Chemical and Biomolecular Engineering, Krone Engineered Biosystems Building Georgia Institute of Technology 950 Atlantic Drive N.W. Atlanta GA 30332 USA
| | - Shelby R. Anderson
- School of Chemical and Biomolecular Engineering, Krone Engineered Biosystems Building Georgia Institute of Technology 950 Atlantic Drive N.W. Atlanta GA 30332 USA
| | - Brent D. Feske
- Department of Chemistry and Biochemistry Georgia Southern University Science Center Suite 1505 11935 Abercorn St., Savannah, GA 31419
| | - John M. Woodley
- Department of Chemical and Biochemical Engineering Technical University of Denmark Building 229, Søltofts Plads DK-2800 Kgs. Lyngby Denmark
| | - Andreas S. Bommarius
- School of Chemical and Biomolecular Engineering, Krone Engineered Biosystems Building Georgia Institute of Technology 950 Atlantic Drive N.W. Atlanta GA 30332 USA
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4
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Thai YC, Szekrenyi A, Qi Y, Black GW, Charnock SJ, Fessner WD. Fluorogenic kinetic assay for high-throughput discovery of stereoselective ketoreductases relevant to pharmaceutical synthesis. Bioorg Med Chem 2018; 26:1320-1326. [DOI: 10.1016/j.bmc.2017.05.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 03/30/2017] [Accepted: 05/11/2017] [Indexed: 12/26/2022]
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Grosch JH, Wagner D, Nistelkas V, Spieß AC. Thermodynamic activity-based intrinsic enzyme kinetic sheds light on enzyme-solvent interactions. Biotechnol Prog 2016; 33:96-103. [DOI: 10.1002/btpr.2401] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/28/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Jan-Hendrik Grosch
- RWTH Aachen University, AVT - Enzyme Process Technology; Worringer Weg 1 Aachen 52074 Germany
- Institute of Biochemical Engineering; TU Braunschweig, Rebenring 56; Braunschweig 38106 Germany
| | - David Wagner
- RWTH Aachen University, AVT - Enzyme Process Technology; Worringer Weg 1 Aachen 52074 Germany
- DWI-Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50; Aachen 52074 Germany
| | - Vasilios Nistelkas
- RWTH Aachen University, AVT - Enzyme Process Technology; Worringer Weg 1 Aachen 52074 Germany
| | - Antje C. Spieß
- RWTH Aachen University, AVT - Enzyme Process Technology; Worringer Weg 1 Aachen 52074 Germany
- Institute of Biochemical Engineering; TU Braunschweig, Rebenring 56; Braunschweig 38106 Germany
- DWI-Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50; Aachen 52074 Germany
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Singh M, Krishnen H, Neelam UK, Charugondla K, Gilla G, Holt-Tiffin K, Bandichhor R. Highly enantioselective bioreduction of 1-(3,4-difluorophenyl)-3-nitropropan-1-one: key intermediate of ticagrelor. RSC Adv 2016. [DOI: 10.1039/c5ra25948g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, highly effective and economical whole-cell mediated process was developed for the biocatalytic reduction of a ketone, intermediate in the synthesis of platelet inhibiting drug ticagrelor.
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Affiliation(s)
- Manpreet Singh
- Integrated Product Development
- Innovation Plaza
- Dr. Reddy's Laboratories Ltd
- India
| | - Hare Krishnen
- Integrated Product Development
- Innovation Plaza
- Dr. Reddy's Laboratories Ltd
- India
| | - Uday Kumar Neelam
- Integrated Product Development
- Innovation Plaza
- Dr. Reddy's Laboratories Ltd
- India
| | - Kavitha Charugondla
- Integrated Product Development
- Innovation Plaza
- Dr. Reddy's Laboratories Ltd
- India
| | - Goverdhan Gilla
- Integrated Product Development
- Innovation Plaza
- Dr. Reddy's Laboratories Ltd
- India
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7
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Activity of Lactobacillus brevis Alcohol Dehydrogenase on Primary and Secondary Alcohol Biofuel Precursors. FERMENTATION-BASEL 2015. [DOI: 10.3390/fermentation1010024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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8
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Nealon CM, Musa MM, Patel JM, Phillips RS. Controlling Substrate Specificity and Stereospecificity of Alcohol Dehydrogenases. ACS Catal 2015. [DOI: 10.1021/cs501457v] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher M. Nealon
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Musa M. Musa
- Department
of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| | - Jay M. Patel
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Robert S. Phillips
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
- Department
of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
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9
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Kawakami N, Hara Y, Miyamoto K. Modulating the catalytic activity and the substrate specificity of alcohol dehydrogenases using cyclic ethers. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00679a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic activity of Thermoanaerobacter brockii alcohol dehydrogenase (Tbadh) is increased by the addition of 1,3-dioxolane, although it is inhibited by the addition of tetrahydrofuran .
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Affiliation(s)
- Norifumi Kawakami
- Department of Biosciences and Informatics
- Keio University
- Yokohama
- Japan
| | - Yosuke Hara
- Department of Biosciences and Informatics
- Keio University
- Yokohama
- Japan
| | - Kenji Miyamoto
- Department of Biosciences and Informatics
- Keio University
- Yokohama
- Japan
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10
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Erdmann V, Mackfeld U, Rother D, Jakoblinnert A. Enantioselective, continuous (R)- and (S)-2-butanol synthesis: achieving high space-time yields with recombinant E. coli cells in a micro-aqueous, solvent-free reaction system. J Biotechnol 2014; 191:106-12. [PMID: 25036751 DOI: 10.1016/j.jbiotec.2014.06.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 06/18/2014] [Accepted: 06/27/2014] [Indexed: 11/30/2022]
Abstract
The stereoselective production of (R)- or (S)-2-butanol is highly challenging. A potent synthesis strategy is the biocatalytic asymmetric reduction of 2-butanone applying alcohol dehydrogenases. However, due to a time-dependent racemisation process, high stereoselectivity is only obtained at incomplete conversion after short reaction times. Here, we present a solution to this problem: by using a continuous process, high biocatalytic selectivity can be achieved while racemisation is suppressed successfully. Furthermore, high conversion was achieved by applying recombinant, lyophilised E. coli cells hosting Lactobacillus brevis alcohol dehydrogenase in a micro-aqueous solvent-free continuous reaction system. The optimisation of residence time (τ) and 2-butanone concentration boosted both conversion (>99%) and enantiomeric excess (ee) of (R)-2-butanol (>96%). When a residence time of only τ=3.1 min was applied, productivity was extraordinary with a space-time yield of 2278±29g/(L×d), thus exceeding the highest values reported to date by a factor of more than eight. The use of E. coli cells overexpressing an ADH of complementary stereoselectivity yielded a synthesis strategy for (S)-2-butanol with an excellent ee (>98%). Although conversion was only moderate (up to 46%), excellent space-time yields of up to 461g/(L×d) were achieved. The investigated concept represents a synthesis strategy that can also be applied to other biocatalytic processes where racemisation poses a challenge.
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Affiliation(s)
- Vanessa Erdmann
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Ursula Mackfeld
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Dörte Rother
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - Andre Jakoblinnert
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich, D-52425 Jülich, Germany.
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12
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Stepankova V, Damborsky J, Chaloupkova R. Organic co-solvents affect activity, stability and enantioselectivity of haloalkane dehalogenases. Biotechnol J 2013; 8:719-29. [PMID: 23420811 DOI: 10.1002/biot.201200378] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 01/21/2013] [Accepted: 02/12/2013] [Indexed: 01/12/2023]
Abstract
Haloalkane dehalogenases are microbial enzymes with a wide range of biotechnological applications, including biocatalysis. The use of organic co-solvents to solubilize their hydrophobic substrates is often necessary. In order to choose the most compatible co-solvent, the effects of 14 co-solvents on activity, stability and enantioselectivity of three model enzymes, DbjA, DhaA, and LinB, were evaluated. All co-solvents caused at high concentration loss of activity and conformational changes. The highest inactivation was induced by tetrahydrofuran, while more hydrophilic co-solvents, such as ethylene glycol and dimethyl sulfoxide, were better tolerated. The effects of co-solvents at low concentration were different for each enzyme-solvent pair. An increase in DbjA activity was induced by the majority of organic co-solvents tested, while activities of DhaA and LinB decreased at comparable concentrations of the same co-solvent. Moreover, a high increase of DbjA enantioselectivity was observed. Ethylene glycol and 1,4-dioxane were shown to have the most positive impact on the enantioselectivity. The favorable influence of these co-solvents on both activity and enantioselectivity makes DbjA suitable for biocatalytic applications. This study represents the first investigation of the effects of organic co-solvents on the biocatalytic performance of haloalkane dehalogenases and will pave the way for their broader use in industrial processes.
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Affiliation(s)
- Veronika Stepankova
- Loschmidt Laboratories, Department of Experimental Biology and Research Centre for Toxic Compounds in the Environment, Masaryk University, Brno, Czech Republic
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Kochius S, Magnusson AO, Hollmann F, Schrader J, Holtmann D. Immobilized redox mediators for electrochemical NAD(P)+ regeneration. Appl Microbiol Biotechnol 2012; 93:2251-64. [PMID: 22327354 DOI: 10.1007/s00253-012-3900-z] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 01/09/2012] [Accepted: 01/10/2012] [Indexed: 11/26/2022]
Abstract
The applicability of dissolved redox mediators for NAD(P)(+) regeneration has been demonstrated several times. Nevertheless, the use of mediators in solutions for sensor applications is not a very convenient strategy since the analysis is not reagentless and long stabilization times occur. The most important drawbacks of dissolved mediators in biocatalytic applications are interferences during product purification, limited reusability of the mediators, and their cost-intensive elimination from wastewater. Therefore, the use of immobilized mediators has both economic and ecological advantages. This work critically reviews the current state-of-art of immobilized redox mediators for electrochemical NAD(P)(+) regeneration. Various surface modification techniques, such as adsorption polymerization and covalent linkage, as well as the corresponding NAD(P)(+) regeneration rates and the operational stability of the immobilized mediator films, will be discussed. By comparison with other existing regeneration systems, the technical potential and future perspectives of biocatalytic redox reactions based on electrochemically fed immobilized mediators will be assessed.
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Naik HG, Yeniad B, Koning CE, Heise A. Investigation of asymmetric alcohol dehydrogenase (ADH) reduction of acetophenone derivatives: effect of charge density. Org Biomol Chem 2012; 10:4961-7. [DOI: 10.1039/c2ob06870b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Singh M, Singh S, Deshaboina S, Krishnen H, Lloyd R, Holt-Tiffin K, Bhattacharya A, Bandichhor R. Asymmetric reduction of a key intermediate of eslicarbazepine acetate using whole cell biotransformation in a biphasic medium. Catal Sci Technol 2012. [DOI: 10.1039/c2cy00537a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Pennacchio A, Giordano A, Rossi M, Raia CA. Asymmetric Reduction of α-Keto Esters with Thermus thermophilus NADH-Dependent Carbonyl Reductase using Glucose Dehydrogenase and Alcohol Dehydrogenase for Cofactor Regeneration. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100107] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Jouyban A, Taherzadeh F, Soruraddin MH, Rashidi MR. Mathematical representation of xanthine oxidase activity in hydro-organic mixtures. BIORESOURCE TECHNOLOGY 2009; 100:6635-6638. [PMID: 19596571 DOI: 10.1016/j.biortech.2009.06.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2009] [Revised: 06/11/2009] [Accepted: 06/12/2009] [Indexed: 05/28/2023]
Abstract
A mathematical model is proposed to calculate the enzyme activity in different concentrations of the organic solvent in hydro-organic mixtures. The accuracy and predictability of the model have been evaluated employing experimentally determined xanthine oxidase activity in five hydro-organic mixtures by using absolute percentage mean deviation (APMD). The obtained APMD for correlative and predictive studies were 5.3% and 7.6%, respectively.
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Affiliation(s)
- A Jouyban
- Faculty of Pharmacy and Drug Applied Research Center, Tabriz University (Medical Sciences), Tabriz 51664-14766, Iran.
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Sandoval C, Méndez JM, Sánchez-Obregón R, Alpízar CB, Barrios H. Reduction and cyclization in biotransformation of carbonyl compounds by cultured cells ofTaxusspecies. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420802475811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Andrade LH, Piovan L, Pasquini MD. Improving the enantioselective bioreduction of aromatic ketones mediated by Aspergillus terreus and Rhizopus oryzae: the role of glycerol as a co-solvent. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.05.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Rashidi MR, Soruraddin MH, Taherzadeh F, Jouyban A. Catalytic activity and stability of xanthine oxidase in aqueous-organic mixtures. BIOCHEMISTRY (MOSCOW) 2009; 74:97-101. [DOI: 10.1134/s0006297909010155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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