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Christ HA, Daniel NP, Solarczek J, Fresenborg LS, Schallmey A, Menzel H. Application of electrospun chitosan-based nanofibers as immobilization matrix for biomolecules. Appl Microbiol Biotechnol 2023; 107:7071-7087. [PMID: 37755509 PMCID: PMC10638201 DOI: 10.1007/s00253-023-12777-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/02/2023] [Accepted: 09/05/2023] [Indexed: 09/28/2023]
Abstract
Nanofiber meshes from electrospun chitosan, highly modified with biotin and arylazides, are well-suited for application as enzyme immobilization matrices. To test this, catalytically active biomolecules were immobilized onto photocrosslinked nanofibrous nonwovens consisting mainly of biotinylated fungal chitosan and a small amount (10 w%) of poly ethylene oxide. In this study, we show that over 10 μg eugenol oxidase per milligram dry polymer matrix can be loaded on UV-crosslinked chitosan nanofibers. We further demonstrate that bound enzyme activity can be fully retained for over 7 days of storage at ambient conditions in aqueous buffer. Samples loaded at maximum enzyme carrying capacity were tested in a custom-made plug-flow reactor system with online UV-VIS spectroscopy for activity determination. High wettability and durability of the hydrophilic chitosan support matrix enabled continuous oxidation of model substrate vanillyl alcohol into vanillin with constant turnover at flow rates of up to 0.24 L/h for over 6 h. This proves the above hypothesis and enables further application of the fibers as stacked microfluidic membranes, biosensors, or structural starting points for affinity crosslinked enzyme gels. KEY POINTS: • Biotinylated chitosan-based nanofibers retain enzymes via mild affinity interactions • Immobilized eugenol oxidase shows high activity and resists continuous washing • Nanofiber matrix material tolerated high flow rates in a continuous-flow setup.
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Affiliation(s)
- Henrik-Alexander Christ
- Institute for Technical Chemistry, Braunschweig University of Technology, Hagenring 30, 38106, Braunschweig, Germany
| | - Nils Peter Daniel
- Institute for Biochemistry, Braunschweig University of Technology, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Jennifer Solarczek
- Institute for Biochemistry, Braunschweig University of Technology, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Leonard Sebastian Fresenborg
- Department of Molecular Cell Biology of Plants, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt am Main, Germany
| | - Anett Schallmey
- Institute for Biochemistry, Braunschweig University of Technology, Spielmannstraße 7, 38106, Braunschweig, Germany
| | - Henning Menzel
- Institute for Technical Chemistry, Braunschweig University of Technology, Hagenring 30, 38106, Braunschweig, Germany.
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2
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Bučko M, Kaniaková K, Hronská H, Gemeiner P, Rosenberg M. Epoxide Hydrolases: Multipotential Biocatalysts. Int J Mol Sci 2023; 24:ijms24087334. [PMID: 37108499 PMCID: PMC10138715 DOI: 10.3390/ijms24087334] [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: 03/27/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Epoxide hydrolases are attractive and industrially important biocatalysts. They can catalyze the enantioselective hydrolysis of epoxides to the corresponding diols as chiral building blocks for bioactive compounds and drugs. In this review article, we discuss the state of the art and development potential of epoxide hydrolases as biocatalysts based on the most recent approaches and techniques. The review covers new approaches to discover epoxide hydrolases using genome mining and enzyme metagenomics, as well as improving enzyme activity, enantioselectivity, enantioconvergence, and thermostability by directed evolution and a rational design. Further improvements in operational and storage stabilization, reusability, pH stabilization, and thermal stabilization by immobilization techniques are discussed in this study. New possibilities for expanding the synthetic capabilities of epoxide hydrolases by their involvement in non-natural enzyme cascade reactions are described.
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Affiliation(s)
- Marek Bučko
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Katarína Kaniaková
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Helena Hronská
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Peter Gemeiner
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Michal Rosenberg
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
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Onur H, Tülek A, Yildirim D, Aslan ES, Binay B. A new highly enantioselective stable epoxide hydrolase from Hypsibius dujardini: Expression in Pichia pastoris and immobilization in ZIF-8 for asymmetric hydrolysis of racemic styrene oxide. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Pose-Boirazian T, Martínez-Costas J, Eibes G. 3D Printing: An Emerging Technology for Biocatalyst Immobilization. Macromol Biosci 2022; 22:e2200110. [PMID: 35579179 DOI: 10.1002/mabi.202200110] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/29/2022] [Indexed: 11/10/2022]
Abstract
Employment of enzymes as biocatalysts offers immense benefits across diverse sectors in the context of green chemistry, biodegradability, and sustainability. When compared to free enzymes in solution, enzyme immobilization proposes an effective means of improving functional efficiency and operational stability. The advance of printable and functional materials utilized in additive manufacturing, coupled with the capability to produce bespoke geometries, has sparked great interest towards the 3D printing of immobilized enzymes. Printable biocatalysts represent a new generation of enzyme immobilization in a more customizable and adaptable manner, unleashing their potential functionalities for countless applications in industrial biotechnology. This review provides an overview of enzyme immobilization techniques and 3D printing technologies, followed by illustrations of the latest 3D printed enzyme-immobilized industrial and clinical applications. The unique advantages of harnessing 3D printing as an enzyme immobilization technique will be presented, alongside a discussion on its potential limitations. Finally, the future perspectives of integrating 3D printing with enzyme immobilization will be considered, highlighting the endless possibilities that are achievable in both research and industry. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Tomás Pose-Boirazian
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Bioquímica y Biología Molecular, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Jose Martínez-Costas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Bioquímica y Biología Molecular, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Gemma Eibes
- CRETUS, Dept. of Chemical Engineering, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
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Miao Q, Zhang C, Zhou S, Meng L, Huang L, Ni Y, Chen L. Immobilization and Characterization of Pectinase onto the Cationic Polystyrene Resin. ACS OMEGA 2021; 6:31683-31688. [PMID: 34869992 PMCID: PMC8637955 DOI: 10.1021/acsomega.1c04374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
In the present study, the immobilization of free pectinase onto polystyrene resin beads via crosslinking with glutaraldehyde was investigated. The immobilized pectinase was characterized by Fourier transform infrared spectroscopy and confocal laser scanning microscopy. After optimizing the immobilization conditions, the optimum pH of immobilized pectinase shifted from 8.0 to 8.5 and the optimum temperature shifted from 45 to 60 °C, showing its improved stability to temperature and pH compared with the free pectinase. The Michaelis-Menten constant K m value of free and immobilized pectinase was determined to be 1.95 and 5.36 mM, respectively. The storage stability of immobilized pectinase was demonstrated with 36.8% of the initial activity preserved after 30 days at 25 °C. The reusability of the immobilized pectinase activity was 54.6% of its initial activity after being recycled six times. Therefore, based on the findings mentioned above, it can be inferred that this simple immobilization technique for pectinase appears to be promising for industrial applications.
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Affiliation(s)
- Qingxian Miao
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
- State
Key Laboratory of Biobased Material and Green Papermaking, Qilu University
of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Chen Zhang
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
| | - Shuai Zhou
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
| | - Lingchao Meng
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
| | - Liulian Huang
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
| | - Yonghao Ni
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
- Limerick
Pulp and Paper Centre, Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Lihui Chen
- College
of Material Engineering, Fujian Agriculture
and Forestry University, Fuzhou 350002, China
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Wahab RA, Elias N, Abdullah F, Ghoshal SK. On the taught new tricks of enzymes immobilization: An all-inclusive overview. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104613] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Reinicke S, Fischer T, Bramski J, Pietruszka J, Böker A. Biocatalytically active microgels by precipitation polymerization of N-isopropyl acrylamide in the presence of an enzyme. RSC Adv 2019; 9:28377-28386. [PMID: 35529607 PMCID: PMC9071056 DOI: 10.1039/c9ra04000e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 09/02/2019] [Indexed: 11/21/2022] Open
Abstract
We present a novel protocol for the synthesis of enzymatically active microgels. The protocol is based on the precipitation polymerization of N-isopropylacrylamide (NIPAm) in the presence of an enzyme and a protein binding comonomer. A basic investigation on the influence of different reaction parameters such as monomer concentration and reaction temperature on the microgel size and size distribution is performed and immobilization yields are determined. Microgels exhibiting hydrodynamic diameters between 100 nm and 1 μm and narrow size distribution could be synthesized while about 31-44% of the enzyme present in the initial reaction mixture can be immobilized. Successful immobilization including a verification of enzymatic activity of the microgels is achieved for glucose oxidase (GOx) and 2-deoxy-d-ribose-5-phosphate aldolase (DERA). The thermoresponsive properties of the microgels are assessed and discussed in the light of activity evolution with temperature. The positive correlation of enzymatic activity with temperature for the GOx containing microgel originates from a direct interaction of the enzyme with the PNIPAm based polymer matrix whose magnitude is highly influenced by temperature.
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Affiliation(s)
- Stefan Reinicke
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 Potsdam-Golm 14476 Germany
- Chair of Polymer Materials and Polymer Technologies, University of Potsdam Potsdam-Golm 14476 Germany
| | - Thilo Fischer
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 Potsdam-Golm 14476 Germany
- Chair of Polymer Materials and Polymer Technologies, University of Potsdam Potsdam-Golm 14476 Germany
| | - Julia Bramski
- Institut of Bioorganic Chemistry, Heinrich Heine University of Düsseldorf at Forschungszentrum Jülich Stetternicher Forst D-52426 Jülich Germany
| | - Jörg Pietruszka
- Institut of Bioorganic Chemistry, Heinrich Heine University of Düsseldorf at Forschungszentrum Jülich Stetternicher Forst D-52426 Jülich Germany
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Alexander Böker
- Fraunhofer Institute for Applied Polymer Research (IAP) Geiselbergstraße 69 Potsdam-Golm 14476 Germany
- Chair of Polymer Materials and Polymer Technologies, University of Potsdam Potsdam-Golm 14476 Germany
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Kamble MP, Yadav GD. Biocatalytic resolution of ( R,S )-styrene oxide using a novel epoxide hydrolase from red mung beans. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.06.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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10
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Saini P, Sareen D. An Overview on the Enhancement of Enantioselectivity and Stability of Microbial Epoxide Hydrolases. Mol Biotechnol 2017; 59:98-116. [PMID: 28271340 DOI: 10.1007/s12033-017-9996-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Epoxide hydrolases (EHs; 3.3.2.x) catalyze the enantioselective ring opening of racemic epoxides to the corresponding enantiopure vicinal diols and remaining equivalent unreacted epoxides. These epoxides and diols are used for the synthesis of chiral drug intermediates. With an upsurge in the methods for identification of novel microbial EHs, a lot of EHs have been discovered and utilized for kinetic resolution of racemic epoxides. However, there is still a constraint on the account of limited EHs being successfully applied on the preparative scale for industrial biotransformations. This limitation has to be overcome before application of identified functional EHs on large scale. Many strategies such as optimizing reaction media, immobilizing EHs and laboratory-scale directed evolution of EHs have been adopted for enhancing the industrial potential of EHs. In this review, these approaches have been highlighted which can serve as a pathway for the enrichment of already identified EHs for their application on an industrial scale in future studies.
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Affiliation(s)
- Priya Saini
- Department of Biochemistry, Panjab University, Sector 25, BMS Block II, Chandigarh, 160014, India
| | - Dipti Sareen
- Department of Biochemistry, Panjab University, Sector 25, BMS Block II, Chandigarh, 160014, India.
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11
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An overview of holocellulose-degrading enzyme immobilization for use in bioethanol production. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.08.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Printable enzyme-embedded materials for methane to methanol conversion. Nat Commun 2016; 7:11900. [PMID: 27301270 PMCID: PMC4912616 DOI: 10.1038/ncomms11900] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 05/10/2016] [Indexed: 01/29/2023] Open
Abstract
An industrial process for the selective activation of methane under mild conditions would be highly valuable for controlling emissions to the environment and for utilizing vast new sources of natural gas. The only selective catalysts for methane activation and conversion to methanol under mild conditions are methane monooxygenases (MMOs) found in methanotrophic bacteria; however, these enzymes are not amenable to standard enzyme immobilization approaches. Using particulate methane monooxygenase (pMMO), we create a biocatalytic polymer material that converts methane to methanol. We demonstrate embedding the material within a silicone lattice to create mechanically robust, gas-permeable membranes, and direct printing of micron-scale structures with controlled geometry. Remarkably, the enzymes retain up to 100% activity in the polymer construct. The printed enzyme-embedded polymer motif is highly flexible for future development and should be useful in a wide range of applications, especially those involving gas–liquid reactions. There is a need for small-scale reactors that convert methane emissions to more valuable products to reduce climate impacts. Here, the authors show that printing 3D structures of the pMMO enzyme enables continuous methane conversion under ambient conditions and reduces mass transfer limitations.
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13
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Tunable temperature responsive liquid chromatography through thiolactone-based immobilization of poly(N-isopropylacrylamide). J Chromatogr A 2015; 1426:126-32. [PMID: 26655790 DOI: 10.1016/j.chroma.2015.11.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/17/2015] [Accepted: 11/18/2015] [Indexed: 11/20/2022]
Abstract
A straightforward and efficient functionalization of aminopropylsilica with polymeric structures is described for the development of temperature responsive stationary phases applicable in purely aqueous liquid chromatography. The immobilization of the thermoresponsive polymers involves a thiolactone-based ring opening using the primary amines in aminopropylsilica, with a simultaneous one-pot, thiol-ene functionalization with an acrylate of choice. This mild, straightforward and modular grafting process results in high polymer coupling yields. By variation of the acrylate for the thiol-ene reaction, different stationary phases can be readily obtained. Two stationary phases as a result of the modular modification of aminopropylsilica were evaluated with test mixtures of hydrophobic analytes and a mixture of di- and tripeptides. Analyses using the 5μm material packed in 10cm×4.6mm columns revealed high hydrophobic retention, which proved adaptable as a function of the temperature in aqueous mobile phases. High versus low retention were obtained at temperatures above and below the lower critical solution temperature of the polymer, respectively. Moreover, the columns depict potential for diastereoisomeric peptide separation. Finally, the lower retention, observed when using PEGylated silica, illustrates the potential of the approach for modular stationary phase tuning.
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Basak S, Punetha VD, Bisht G, Bisht SS, Sahoo NG, Cho JW. Recent Trends of Polymer-Protein Conjugate Application in Biocatalysis: A Review. POLYM REV 2015. [DOI: 10.1080/15583724.2014.971371] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Production of (R)-epichlorohydrin from 1,3-dichloro-2-propanol by two-step biocatalysis using haloalcohol dehalogenase and epoxide hydrolase in two-phase system. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.02.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Yildirim D, Tükel SS, Alptekin Ö, Alagöz D. Immobilized Aspergillus niger epoxide hydrolases: Cost-effective biocatalysts for the prepation of enantiopure styrene oxide, propylene oxide and epichlorohydrin. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.11.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Sheldon RA, van Pelt S. Enzyme immobilisation in biocatalysis: why, what and how. Chem Soc Rev 2013; 42:6223-35. [DOI: 10.1039/c3cs60075k] [Citation(s) in RCA: 1764] [Impact Index Per Article: 160.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Malvi B, Gupta SS. Encapsulation of enzyme in large mesoporous material with small mesoporous windows. Chem Commun (Camb) 2012; 48:7853-5. [DOI: 10.1039/c2cc33592a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yildirim D, Tükel SS, Alagöz D, Alptekin Ö. Preparative-scale kinetic resolution of racemic styrene oxide by immobilized epoxide hydrolase. Enzyme Microb Technol 2011; 49:555-9. [DOI: 10.1016/j.enzmictec.2011.08.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 08/01/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
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20
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Grulich M, Maršálek J, Kyslík P, Štěpánek V, Kotik M. Production, enrichment and immobilization of a metagenome-derived epoxide hydrolase. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Bala N, Chimni SS. Recent developments in the asymmetric hydrolytic ring opening of epoxides catalysed by microbial epoxide hydrolase. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.11.013] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Karboune S, Archelas A, Baratti JC. Free and immobilized Aspergillus niger epoxide hydrolase-catalyzed hydrolytic kinetic resolution of racemic p-chlorostyrene oxide in a neat organic solvent medium. Process Biochem 2010. [DOI: 10.1016/j.procbio.2009.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Li X, Xu T, Lu H, Ma X, Kai L, Guo K, Zhao Y. Purification and characterization of a cis-epoxysuccinic acid hydrolase from Bordetella sp. strain 1–3. Protein Expr Purif 2010; 69:16-20. [DOI: 10.1016/j.pep.2009.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 09/08/2009] [Accepted: 09/26/2009] [Indexed: 10/20/2022]
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Karboune S, Archelas A, Furstoss R, Baratti JC. Immobilization of theSolanum tuberosumepoxide hydrolase and its application in an enantioconvergent process. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420500372328] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Biotechnological production of enantiopure epoxides by enzymatic kinetic resolution. Appl Microbiol Biotechnol 2009; 84:239-47. [DOI: 10.1007/s00253-009-2110-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 06/24/2009] [Accepted: 06/24/2009] [Indexed: 10/20/2022]
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Wang P, Hu X, Cook S, Hwang HM. Influence of silica-derived nano-supporters on cellobiase after immobilization. Appl Biochem Biotechnol 2008; 158:88-96. [PMID: 18679593 DOI: 10.1007/s12010-008-8321-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Accepted: 07/14/2008] [Indexed: 10/21/2022]
Abstract
Core shell magnetite nanoparticle (CSMN) was successfully synthesized with diameter around 125 nm according to the determination with scanning electronic microscopy. SBA-15 with diameter around 31 nm was synthesized in our previous work as another supporter for immobilized degradation enzymes. The aim of this study was to investigate the influence of silica-derived nano-supporters on cellobiase after immobilization. With covalent method, glutaraldehyde was introduced to immobilize cellobiase. The immobilized enzyme efficiency, specific activity, and its characterization, including optimum pH, pH stability, optimum temperature for enzyme reaction, and enzyme thermal stability were investigated. Results show that the method of enzyme immobilization on both nano-supporters could improve cellobiase stability under low pH and high temperature conditions compared with the free enzyme. In the aspect of immobilization efficiency, SBA had higher amount of bounded protein than that of CSMN, but had lower specific enzyme activity than CSMN, assumably due to the change in silica surface properties caused by process of supporter synthesis.
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Affiliation(s)
- Peng Wang
- Biology Department, Jackson State University, Jackson, MS 39217, USA
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27
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Bisogno FR, Orden AA, Pranzoni CA, Cifuente DA, Giordano OS, Kurina Sanz M. Atypical regioselective biohydrolysis on steroidal oxiranes by Aspergillus niger whole cells: some stereochemical features. Steroids 2007; 72:643-52. [PMID: 17572462 DOI: 10.1016/j.steroids.2007.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 04/20/2007] [Accepted: 04/26/2007] [Indexed: 11/30/2022]
Abstract
5,6-Epoxycholestan-3beta-ol derivatives were hydrolyzed in a diastereoconvergent manner by growing and resting cells of several strains of Aspergillus niger, particularly A. niger ATCC 11394. These strains displayed opposite regioselectivity toward each isomer in an alpha and beta epoxide mixture, thus, the nucleophilic attack took place at the less substituted and the most substituted carbon atom on each diasteromer, respectively. These biocatalysts opened trisubstituted oxiranes but were unable to hydrolyze the disubstituted oxiranes in the tested sterol derivatives. These findings suggest that A. niger strains possess another hydrolytic ability different from the commercial A. niger epoxide hydrolase (EH) that did not accept this kind of steroidal oxiranes as substrates.
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Affiliation(s)
- Fabricio R Bisogno
- INTEQUI-CONICET, Area de Química Orgánica, Facultad de Química, Bioquímica y Farmacia, UNSL, Chacabuco y Pedernera, 5700 San Luis, Argentina
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Lee EY, Shuler ML. Molecular engineering of epoxide hydrolase and its application to asymmetric and enantioconvergent hydrolysis. Biotechnol Bioeng 2007; 98:318-27. [PMID: 17405175 DOI: 10.1002/bit.21444] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Safety and regulatory issues favor increasing use of enantiopure compounds in pharmaceuticals. Enantiopure epoxides and diols are valuable intermediates in organic synthesis for the production of optically active pharmaceuticals. Enantiopure epoxide can be prepared using epoxide hydrolase (EH)-catalyzed asymmetric hydrolysis of its racemate. Enantioconvergent hydrolysis of racemic epoxides by EHs possessing complementary enantioselectivity and regioselectivity can lead to the formation of enantiopure vicinal diols with high yield. EHs are cofactor-independent and easy-to-use catalysts. EHs will attract much attention as commercial biocatalysts for the preparation of enantiopure epoxides and diols. In this paper, recent progress in molecular engineering of EHs is reviewed. Some examples and prospects of asymmetric and enantioconvergent hydrolysis reactions are discussed as supplements to molecular engineering to improve EH performance.
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Affiliation(s)
- Eun Yeol Lee
- Department of Food Science and Biotechnology, Kyungsung University, Daeyeon-dong, Nam-gu, Busan 608-736, Republic of Korea.
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