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Maiangwa J, Hamdan SH, Mohamad Ali MS, Salleh AB, Zaliha Raja Abd Rahman RN, Shariff FM, Leow TC. Enhancing the stability of Geobacillus zalihae T1 lipase in organic solvents and insights into the structural stability of its variants. J Mol Graph Model 2021; 105:107897. [PMID: 33770705 DOI: 10.1016/j.jmgm.2021.107897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 03/04/2021] [Accepted: 03/04/2021] [Indexed: 11/28/2022]
Abstract
Critical to the applications of proteins in non-aqueous enzymatic processes is their structural dynamics in relation to solvent polarity. A pool of mutants derived from Geobacillus zalihae T1 lipase was screened in organic solvents (methanol, ethanol, propanol, butanol and pentanol) resulting in the selection of six mutants at initial screening (A83D/K251E, R21C, G35D/S195 N, K84R/R103C/M121I/T272 M and R106H/G327S). Site-directed mutagenesis further yielded quadruple mutants A83D/M121I/K251E/G327S and A83D/M121I/S195 N/T272 M, both of which had improved activity after incubation in methanol. The km and kcat values of these mutants vary marginally with the wild-type enzyme in the methanol/substrate mixture. Thermally induced unfolding of mutants was accompanied with some loss of secondary structure content. The root mean square deviations (RMSD) and B-factors revealed that changes in the structural organization are intertwined with an interplay of the protein backbone with organic solvents. Spatially exposed charged residues showed correlations between the solvation dynamics of the methanol solvent and the hydrophobicity of the residues. The short distances of the radial distribution function provided the required distances for hydrogen bond formation and hydrophobic interactions. These dynamic changes demonstrate newly formed structural interactions could be targeted and incorporated experimentally on the basis of solvent mobility and mutant residues.
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Affiliation(s)
- Jonathan Maiangwa
- Department of Cell and Molecular Biology, Enzyme Microbial Technology Research Center, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia; Department of Microbiology Kaduna State University, Nigeria; Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia
| | - Siti Hajar Hamdan
- Department of Biochemistry, Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia
| | - Mohd Shukuri Mohamad Ali
- Department of Biochemistry, Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia
| | - Abu Bakar Salleh
- Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia
| | - Raja Noor Zaliha Raja Abd Rahman
- Department of Microbiology, Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Fairolniza Mohd Shariff
- Institute of Bioscience, 43400, UPM Serdang, Universiti Putra Malaysia Serdang, Selangor, Malaysia
| | - Thean Chor Leow
- Department of Cell and Molecular Biology, Enzyme Microbial Technology Research Center, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia; Enzyme Microbial Technology Research Centre, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia Serdang, 43400, UPM Serdang, Selangor, Malaysia; Institute of Bioscience, 43400, UPM Serdang, Universiti Putra Malaysia Serdang, Selangor, Malaysia.
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Liskova V, Stepankova V, Bednar D, Brezovsky J, Prokop Z, Chaloupkova R, Damborsky J. Different Structural Origins of the Enantioselectivity of Haloalkane Dehalogenases toward Linear β-Haloalkanes: Open-Solvated versus Occluded-Desolvated Active Sites. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Veronika Liskova
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
| | - Veronika Stepankova
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
- Enantis s.r.o.; Kamenice 34 625 00 Brno Czech Republic
| | - David Bednar
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
| | - Jan Brezovsky
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
| | - Zbynek Prokop
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
| | - Radka Chaloupkova
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
| | - Jiri Damborsky
- Loschmidt Laboratories; Department of Experimental Biology and RECETOX; Faculty of Science; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- International Clinical Research Center; St. Anne's University Hospital; Pekarska 53 656 91 Brno Czech Republic
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4
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Liskova V, Stepankova V, Bednar D, Brezovsky J, Prokop Z, Chaloupkova R, Damborsky J. Different Structural Origins of the Enantioselectivity of Haloalkane Dehalogenases toward Linear β-Haloalkanes: Open-Solvated versus Occluded-Desolvated Active Sites. Angew Chem Int Ed Engl 2017; 56:4719-4723. [PMID: 28334478 DOI: 10.1002/anie.201611193] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/17/2017] [Indexed: 12/24/2022]
Abstract
The enzymatic enantiodiscrimination of linear β-haloalkanes is difficult because the simple structures of the substrates prevent directional interactions. Herein we describe two distinct molecular mechanisms for the enantiodiscrimination of the β-haloalkane 2-bromopentane by haloalkane dehalogenases. Highly enantioselective DbjA has an open, solvent-accessible active site, whereas the engineered enzyme DhaA31 has an occluded and less solvated cavity but shows similar enantioselectivity. The enantioselectivity of DhaA31 arises from steric hindrance imposed by two specific substitutions rather than hydration as in DbjA.
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Affiliation(s)
- Veronika Liskova
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
| | - Veronika Stepankova
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
- Enantis s.r.o., Kamenice 34, 625 00, Brno, Czech Republic
| | - David Bednar
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
| | - Jan Brezovsky
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
| | - Zbynek Prokop
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
| | - Radka Chaloupkova
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
| | - Jiri Damborsky
- Loschmidt Laboratories, Department of Experimental Biology and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, Pekarska 53, 656 91, Brno, Czech Republic
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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: 1.3] [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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Zhang Y, Gao X, Wang C, Zheng Z, Wang L, Liu J. One-pot stereoselective synthesis of chiral 1, 3-oxathiolane by Trichosporon laibachii lipase: Optimization by response surface methodology integrated a desirability function approach. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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7
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Tsai SW. Enantiopreference of Candida antarctica lipase B toward carboxylic acids: Substrate models and enantioselectivity thereof. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2014.07.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Structural features of N-benzylated-β-amino acid methyl esters essential for enantiodifferentiation by lipase B from Candida antarctica in hydrolytic reactions. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.02.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Gu J, Ye L, Guo F, Lv X, Lu W, Yu H. Improved apparent enantioselectivity of a hydrolase by sequential hydrolysis and racemization. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.139] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Li R, Du W, Lu D, Dai L, Liu D. Study on the enzyme's 1,3-positional specificity during lipozyme TL-mediated biodiesel production. RSC Adv 2015. [DOI: 10.1039/c5ra09432a] [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
Effect of organic solvent on lipase's 1,3-positional specificity from a kinetics study. Effect of water activity on lipase's 1,3-positional specificity from a kinetics study. Molecular dynamics simulation to reveal the mechanism.
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Affiliation(s)
- Renwang Li
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Wei Du
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Dianlan Lu
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Lingmei Dai
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Dehua Liu
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
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11
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Kitamoto Y, Kuruma Y, Suzuki K, Hattori T. Effect of Solvent Polarity on Enantioselectivity in Candida Antarctica Lipase B Catalyzed Kinetic Resolution of Primary and Secondary Alcohols. J Org Chem 2014; 80:521-7. [DOI: 10.1021/jo502521e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yuichi Kitamoto
- Department of Biomolecular
Engineering, Graduate School of Engineering, Tohoku University, 6-6-11
Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yosuke Kuruma
- Department of Biomolecular
Engineering, Graduate School of Engineering, Tohoku University, 6-6-11
Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Kazumi Suzuki
- Department of Biomolecular
Engineering, Graduate School of Engineering, Tohoku University, 6-6-11
Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tetsutaro Hattori
- Department of Biomolecular
Engineering, Graduate School of Engineering, Tohoku University, 6-6-11
Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
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12
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Xiao P, Zhang A, Zheng L, Song Y. Straightforward Enzyme-Catalyzed Asymmetric Synthesis of Caffeic Acid Esters in Enantioenriched Form. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5010477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Peiliang Xiao
- College
of Life Sciences, Key Laboratory for Molecular Enzymology and Engineering
of Ministry of Education, Jilin University, Changchun 130012, People’s Republic of China
| | - Aijun Zhang
- College
of Life Sciences, Key Laboratory for Molecular Enzymology and Engineering
of Ministry of Education, Jilin University, Changchun 130012, People’s Republic of China
| | - Liangyu Zheng
- College
of Life Sciences, Key Laboratory for Molecular Enzymology and Engineering
of Ministry of Education, Jilin University, Changchun 130012, People’s Republic of China
| | - Yanqiu Song
- The
First Hospital, Jilin University, Changchun 130012, People’s Republic of China
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13
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Liu Y, Guo C, Liu CZ. Efficient Kinetic Resolution of (R,S)-2-Octanol Catalyzed by Magnetite-Immobilized Yarrowia lipolytica Lipase in Mixed Ionic Liquids. Catal Letters 2014. [DOI: 10.1007/s10562-014-1303-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Moure VR, Fabrício C, Frensch G, Marques FA, Mitchell DA, Krieger N. Enhancing the enantioselectivity of the lipase from Burkholderia cepacia LTEB11 towards the resolution of secondary allylic alcohols. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2014. [DOI: 10.1016/j.bcab.2013.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Liu Y, Guo C, Liu CZ. Development of a mixed solvent system for the efficient resolution of (R, S)-2-octanol catalyzed by magnetite-immobilized lipase. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Schopf P, Warshel A. Validating computer simulations of enantioselective catalysis; reproducing the large steric and entropic contributions in Candida Antarctica lipase B. Proteins 2014; 82:1387-99. [PMID: 24403025 DOI: 10.1002/prot.24506] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 12/23/2013] [Accepted: 01/06/2014] [Indexed: 11/06/2022]
Abstract
The prospect for computer-aided refinement of stereoselective enzymes is further validated by simulating the ester hydrolysis by the wild-type and mutants of CalB, focusing on the challenge of dealing with strong steric effects and entropic contributions. This was done using the empirical valence bond (EVB) method in a quantitative screening of the enantioselectivity, considering both k(cat) and k(cat)/K(M) of the R and S stereoisomers. Although the simulations require very extensive sampling for convergence they give encouraging results and major validation, indicating that our approach offers a powerful tool for computer-aided design of enantioselective enzymes. This is particularly true in cases with large changes in steric effects where alternative approaches may have difficulties in capturing the interplay between steric clashes with the reacting substrate and protein flexibility.
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Affiliation(s)
- Patrick Schopf
- Department of Chemistry, University of Southern California, Los Angeles, California, 90089
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17
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Stereoselective synthesis of caffeic acid amides via enzyme-catalyzed asymmetric aminolysis reaction. J Biotechnol 2013; 168:552-9. [DOI: 10.1016/j.jbiotec.2013.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 08/22/2013] [Accepted: 09/11/2013] [Indexed: 11/19/2022]
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18
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Kulschewski T, Sasso F, Secundo F, Lotti M, Pleiss J. Molecular mechanism of deactivation of C. antarctica lipase B by methanol. J Biotechnol 2013; 168:462-9. [PMID: 24144811 DOI: 10.1016/j.jbiotec.2013.10.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/27/2013] [Accepted: 10/08/2013] [Indexed: 11/28/2022]
Abstract
The catalytic activity of Candida antarctica lipase B upon alcoholysis of a constant concentration of 15.2% vinyl acetate (vol/vol) and varying concentrations of methanol (0.7-60%) in toluene was determined experimentally by measuring the initial reaction velocity. The molecular mechanism of the deactivation of the enzyme by methanol was investigated by fitting the experimental data to a kinetic model and by molecular dynamics simulations of C. antarctica lipase B in toluene-methanol-water mixtures. The highest catalytic activity (280 U/mg) was observed at methanol concentrations as low as 0.7% methanol (vol/vol), followed by a sharp decrease at higher methanol concentrations. For methanol concentrations above 10% (vol/vol), catalytic activity was at 30% of the maximum activity. A variation of water activity in the range 0.02-0.09 had only minor effects. These experimental observations are described by a simple kinetic model using three assumptions: (1) a ping-pong bi-bi mechanism of the enzyme, (2) competitive inhibition by the substrate methanol, and (3) by describing enzyme kinetics by the thermodynamic activities of the substrates rather than by their concentrations. Two equilibrium constants of methanol (KM,MeOH=0.05 and Ki,MeOH=0.23) were derived by modeling methanol binding to the substrate binding site of the lipase in molecular dynamics simulations of protein-solvent systems at atomic resolution. Thus, the sharp maximum of catalytic activity of C. antarctica lipase B at 0.7% methanol is a direct consequence of the fact that methanol-toluene mixtures are far from ideal. Understanding the thermodynamics of solvent mixtures is prerequisite to a quantitative model of enzymatic activity in organic solvents.
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Affiliation(s)
- Tobias Kulschewski
- Institute of Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany
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19
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Jeon BW, Lee J, Kim HS, Cho DH, Lee H, Chang R, Kim YH. Lipase-catalyzed enantioselective synthesis of (R,R)-lactide from alkyl lactate to produce PDLA (poly D-lactic acid) and stereocomplex PLA (poly lactic acid). J Biotechnol 2013; 168:201-7. [PMID: 23845270 DOI: 10.1016/j.jbiotec.2013.06.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 06/11/2013] [Accepted: 06/28/2013] [Indexed: 11/29/2022]
Abstract
R-lactide, a pivotal monomer for the production of poly (D-lactic acid) (PDLA) or stereocomplex poly (lactic acid) (PLA) was synthesized from alkyl (R)-lactate through a lipase-catalyzed reaction without racemization. From among several types of lipase, only lipase B from Candida antarctica (Novozym 435; CAL-B) was effective in the reaction that synthesized (R,R)-lactide. Enantiopure (R,R)-lactide, which consisted of over 99% enantiomeric excess, was synthesized from methyl (R)-lactate through CAL-B catalysis. Removal of the methanol by-product was critical to obtain a high level of lactide conversion. The (R,R)-lactide yield was 56% in a reaction containing 100 mg of Novozym 435, 10 mM methyl (R)-lactate and 1500 mg of molecular sieve 5A in methyl tert-butyl ether (MTBE). The important monomer (R,R)-lactide that is required for the production of the widely recognized bio-plastic PDLA and the PLA stereocomplex can be obtained using this novel synthetic method.
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Affiliation(s)
- Byoung Wook Jeon
- Department of Chemical Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea
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20
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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: 36] [Impact Index Per Article: 3.0] [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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21
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Gerhards T, Mackfeld U, Bocola M, von Lieres E, Wiechert W, Pohl M, Rother D. Influence of Organic Solvents on Enzymatic Asymmetric Carboligations. Adv Synth Catal 2012; 354:2805-2820. [PMID: 23349644 PMCID: PMC3549479 DOI: 10.1002/adsc.201200284] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 06/25/2012] [Indexed: 11/25/2022]
Abstract
The asymmetric mixed carboligation of aldehydes with thiamine diphosphate (ThDP)-dependent enzymes is an excellent example where activity as well as changes in chemo- and stereoselectivity can be followed sensitively. To elucidate the influence of organic additives in enzymatic carboligation reactions of mixed 2-hydroxy ketones, we present a comparative study of six ThDP-dependent enzymes in 13 water-miscible organic solvents under equivalent reaction conditions. The influence of the additives on the stereoselectivity is most pronounced and follows a general trend. If the enzyme stereoselectivity in aqueous buffer is already >99.9% ee, none of the solvents reduces this high selectivity. In contrast, both stereoselectivity and chemoselectivity are strongly influenced if the enzyme is rather unselective in aqueous buffer. For the S-selective enzyme with the largest active site, we were able to prove a general correlation of the solvent-excluded volume of the additives with the effect on selectivity changes: the smaller the organic solvent molecule, the higher the impact of this additive. Further, a correlation to log P of the additives on selectivity was detected if two additives have almost the same solvent-excluded volume. The observed results are discussed in terms of structural, biochemical and energetic effects. This work demonstrates the potential of medium engineering as a powerful additional tool for varying enzyme selectivity and thus engineering the product range of biotransformations. It further demonstrates that the use of cosolvents should be carefully planned, as the solvents may compete with the substrate(s) for binding sites in the enzyme active site.
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Affiliation(s)
- Tina Gerhards
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH 52425 Jülich, Germany, ; phone: (+49)-2461-616772
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Yeniad B, Köklükaya NO, Naik H, Fijten MWM, Koning CE, Heise A. Synthesis of enantiopure homo and copolymers by raft polymerization and investigation of their enantioselective lipase-catalyzed esterification. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Manoel EA, Pais KC, Cunha AG, Simas ABC, Coelho MAZ, Freire DMG. Kinetic Resolution of 1,3,6-Tri-O-benzyl-myo-Inositol by Novozym 435: Optimization and Enzyme Reuse. Org Process Res Dev 2012. [DOI: 10.1021/op300063f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Evelin A. Manoel
- Departamento
de Engenharia Bioquímica, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio
de Janeiro, RJ, Brazil, EQ
| | - Karla C. Pais
- Núcleo
de Pesquisas de Produtos Naturais (NPPN), Universidade Federal do Rio de Janeiro, Rio de Janeiro,
Brazil
| | - Aline G. Cunha
- Departamento
de Bioquímica, Programa de Pós-Graduação
em Bioquímica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alessandro B. C. Simas
- Núcleo
de Pesquisas de Produtos Naturais (NPPN), Universidade Federal do Rio de Janeiro, Rio de Janeiro,
Brazil
| | - Maria Alice Z. Coelho
- Departamento
de Engenharia Bioquímica, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio
de Janeiro, RJ, Brazil, EQ
| | - Denise M. G. Freire
- Departamento
de Bioquímica, Programa de Pós-Graduação
em Bioquímica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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24
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Resolution of racemic 4-hydroxy-2-cyclopentenone with immobilized penicillin G acylase. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Quantitative prediction of enantioselectivity of Candida antarctica lipase B by combining docking simulations and quantitative structure–activity relationship (QSAR) analysis. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Idris A, Bukhari A. Immobilized Candida antarctica lipase B: Hydration, stripping off and application in ring opening polyester synthesis. Biotechnol Adv 2011; 30:550-63. [PMID: 22041165 DOI: 10.1016/j.biotechadv.2011.10.002] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 09/09/2011] [Accepted: 10/04/2011] [Indexed: 10/16/2022]
Abstract
This work reviews the stripping off, role of water molecules in activity, and flexibility of immobilized Candida antarctica lipase B (CALB). Employment of CALB in ring opening polyester synthesis emphasizing on a polylactide is discussed in detail. Execution of enzymes in place of inorganic catalysts is the most green alternative for sustainable and environment friendly synthesis of products on an industrial scale. Robust immobilization and consequently performance of enzyme is the essential objective of enzyme application in industry. Water bound to the surface of an enzyme (contact class of water molecules) is inevitable for enzyme performance; it controls enzyme dynamics via flexibility changes and has intensive influence on enzyme activity. The value of pH during immobilization of CALB plays a critical role in fixing the active conformation of an enzyme. Comprehensive selection of support and protocol can develop a robust immobilized enzyme thus enhancing its performance. Organic solvents with a log P value higher than four are more suitable for enzymatic catalysis as these solvents tend to strip away very little of the enzyme surface bound water molecules. Alternatively ionic liquid can work as a more promising reaction media. Covalent immobilization is an exclusively reliable technique to circumvent the leaching of enzymes and to enhance stability. Activated polystyrene nanoparticles can prove to be a practical and economical support for chemical immobilization of CALB. In order to reduce the E-factor for the synthesis of biodegradable polymers; enzymatic ring opening polyester synthesis (eROPS) of cyclic monomers is a more sensible route for polyester synthesis. Synergies obtained from ionic liquids and immobilized enzyme can be much effective eROPS.
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Affiliation(s)
- Ani Idris
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.
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27
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Effect of the immobilization protocol on the properties of lipase B from Candida antarctica in organic media: Enantiospecifc production of atenolol acetate. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.04.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Gorke JT, Srienc F, Kazlauskas RJ. Deep Eutectic Solvents for Candida antarcticaLipase B-Catalyzed Reactions. ACS SYMPOSIUM SERIES 2010. [DOI: 10.1021/bk-2010-1038.ch014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Johnathan T. Gorke
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455
- BioTechnology Institute, University of Minnesota, Saint Paul, MN 55108
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Saint Paul, MN 55108
| | - Friedrich Srienc
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455
- BioTechnology Institute, University of Minnesota, Saint Paul, MN 55108
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Saint Paul, MN 55108
| | - Romas J. Kazlauskas
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455
- BioTechnology Institute, University of Minnesota, Saint Paul, MN 55108
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Saint Paul, MN 55108
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30
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Cardillo G, Gennari A, Gentilucci L, Mosconi E, Tolomelli A, Troisi S. Synthesis of chiral non-racemic intermediates and Arg-Gly-Asp mimetics by CaLB-catalyzed resolution. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2009.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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31
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Branco RJF, Graber M, Denis V, Pleiss JÃ. Molecular Mechanism of the Hydration ofCandida antarcticaLipase B in the Gas Phase: Water Adsorption Isotherms and Molecular Dynamics Simulations. Chembiochem 2009; 10:2913-9. [DOI: 10.1002/cbic.200900544] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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Wang PY, Chen YJ, Wu AC, Lin YS, Kao MF, Chen JR, Ciou JF, Tsai SW. (R,S)-Azolides as Novel Substrates for Lipase-Catalyzed Hydrolytic Resolution in Organic Solvents. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900391] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Léonard-Nevers V, Marton Z, Lamare S, Hult K, Graber M. Understanding water effect on Candida antarctica lipase B activity and enantioselectivity towards secondary alcohols. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2009.01.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Juhl PB, Trodler P, Tyagi S, Pleiss J. Modelling substrate specificity and enantioselectivity for lipases and esterases by substrate-imprinted docking. BMC STRUCTURAL BIOLOGY 2009; 9:39. [PMID: 19493341 PMCID: PMC2699341 DOI: 10.1186/1472-6807-9-39] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Accepted: 06/03/2009] [Indexed: 11/15/2022]
Abstract
Background Previously, ways to adapt docking programs that were developed for modelling inhibitor-receptor interaction have been explored. Two main issues were discussed. First, when trying to model catalysis a reaction intermediate of the substrate is expected to provide more valid information than the ground state of the substrate. Second, the incorporation of protein flexibility is essential for reliable predictions. Results Here we present a predictive and robust method to model substrate specificity and enantioselectivity of lipases and esterases that uses reaction intermediates and incorporates protein flexibility. Substrate-imprinted docking starts with covalent docking of reaction intermediates, followed by geometry optimisation of the resulting enzyme-substrate complex. After a second round of docking the same substrate into the geometry-optimised structures, productive poses are identified by geometric filter criteria and ranked by their docking scores. Substrate-imprinted docking was applied in order to model (i) enantioselectivity of Candida antarctica lipase B and a W104A mutant, (ii) enantioselectivity and substrate specificity of Candida rugosa lipase and Burkholderia cepacia lipase, and (iii) substrate specificity of an acetyl- and a butyrylcholine esterase toward the substrates acetyl- and butyrylcholine. Conclusion The experimentally observed differences in selectivity and specificity of the enzymes were reproduced with an accuracy of 81%. The method was robust toward small differences in initial structures (different crystallisation conditions or a co-crystallised ligand), although large displacements of catalytic residues often resulted in substrate poses that did not pass the geometric filter criteria.
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Affiliation(s)
- P Benjamin Juhl
- Institute of Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
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35
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Solvent effects on the enantioselectivity of the thermophilic lipase QLM in the resolution of (R, S)-2-octanol and (R, S)-2-pentanol. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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37
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Optimization of benzoin synthesis in supercritical carbon dioxide by response surface methodology (RSM). J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.07.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Guieysse D, Cortés J, Puech-Guenot S, Barbe S, Lafaquière V, Monsan P, Siméon T, André I, Remaud-Siméon M. A Structure-Controlled Investigation of Lipase Enantioselectivity by a Path-Planning Approach. Chembiochem 2008; 9:1308-17. [DOI: 10.1002/cbic.200700548] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Modeling structure and flexibility of Candida antarctica lipase B in organic solvents. BMC STRUCTURAL BIOLOGY 2008; 8:9. [PMID: 18254946 PMCID: PMC2262892 DOI: 10.1186/1472-6807-8-9] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Accepted: 02/06/2008] [Indexed: 11/22/2022]
Abstract
Background The structure and flexibility of Candida antarctica lipase B in water and five different organic solvent models was investigated using multiple molecular dynamics simulations to describe the effect of solvents on structure and dynamics. Interactions of the solvents with the protein and the distribution of water molecules at the protein surface were examined. Results The simulated structure was independent of the solvent, and had a low deviation from the crystal structure. However, the hydrophilic surface of CALB in non-polar solvents decreased by 10% in comparison to water, while the hydrophobic surface is slightly increased by 1%. There is a large influence on the flexibility depending on the dielectric constant of the solvent, with a high flexibility in water and a low flexibility in organic solvents. With decreasing dielectric constant, the number of surface bound water molecules significantly increased and a spanning water network with an increasing size was formed. Conclusion The reduced flexibility of Candida antarctica lipase B in organic solvents is caused by a spanning water network resulting from less mobile and slowly exchanging water molecules at the protein-surface. The reduced flexibility of Candida antarctica lipase B in organic solvent is not only caused by the interactions between solvent-protein, but mainly by the formation of a spanning water network.
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40
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The enantioselective hydrolysis of racemic naproxen methyl ester in supercritical CO2 using Candida rugosa lipase. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2007.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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41
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Hobbs HR, Thomas NR. Biocatalysis in Supercritical Fluids, in Fluorous Solvents, and under Solvent-Free Conditions. Chem Rev 2007; 107:2786-820. [PMID: 17564485 DOI: 10.1021/cr0683820] [Citation(s) in RCA: 213] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Helen R Hobbs
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
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42
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Xu TW, Xu JH, Yu W, Zhong JH. Investigating pH and Cu (II) effects on lipase activity and enantioselectivity via kinetic and spectroscopic methods. Biotechnol J 2006; 1:1293-301. [PMID: 17068757 DOI: 10.1002/biot.200600135] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
For Candida rugosa lipase (CRL) catalyzed hydrolysis of racemic 1-phenethyl acetate, both the weakly acidic pH (pH 6.0) and the addition of 1 mM copper (II) ion enhanced the enzyme activity and enantioselectivity (E value) about twofold, as compared with that under neutral pH and noadditive conditions. The decrease of activation free energy (DeltaG) and increase of k(cat)(R)/k(cat)(S) at weakly acidic pH and/or in the presence of copper (II) characterized the kinetic behavior of CRL. On the other hand, for providing reasonable insights into the catalytic mechanism and the structural basis for enantioselectivity alteration, spectroscopic techniques were employed to probe conformational changes of the enzyme in each medium assayed. The fluorescence emission spectra revealed that pH and copper (II) might exert different effects on the microenvironment of Trp residue and thereby on the protein conformation, which could be further verified by UV-visible and Raman spectra. The conformational modulation of CRL associated with either pH or copper (II) concentration in the reaction medium could be attributed to the flexible and sensitive conformation of the enzyme, which is responsible for the significant variation of apparent activity and enantioselectivity with the tuning of biocatalyst microenvironment.
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Affiliation(s)
- Tian-Wen Xu
- Laboratory of Biocatalysis and Bioprocessing, State Key Laboratory of Bioreactor Engineering, Shanghai, PR China
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43
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Braiuca P, Ebert C, Basso A, Linda P, Gardossi L. Computational methods to rationalize experimental strategies in biocatalysis. Trends Biotechnol 2006; 24:419-25. [PMID: 16870286 DOI: 10.1016/j.tibtech.2006.07.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2005] [Revised: 05/24/2006] [Accepted: 07/12/2006] [Indexed: 11/15/2022]
Abstract
Computational methods are more and more widely applied in biocatalysis to gain rational guidelines, to orient experimental planning and, ultimately, to avoid expensive and time-consuming experiments. In this respect, molecular modelling, multivariate statistical analysis and chemometrics in general are useful computational tools, although they follow completely different investigative approaches.
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Affiliation(s)
- Paolo Braiuca
- Laboratory of Applied and Computational Biocatalysis, Dipartimento di Scienze Farmaceutiche, Università degli Studi, Piazzale Europa 1, 34127 Trieste, Italy
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44
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Biocatalytic esterification of lavandulol in supercritical carbon dioxide using acetic acid as the acyl donor. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.11.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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45
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Improvement of the enantioselectivity of lipase (fraction B) from Candida antarctica via adsorpiton on polyethylenimine-agarose under different experimental conditions. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2006.03.025] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Blank K, Morfill J, Gumpp H, Gaub HE. Functional expression of Candida antarctica lipase B in Eschericha coli. J Biotechnol 2006; 125:474-83. [PMID: 16713003 DOI: 10.1016/j.jbiotec.2006.04.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2005] [Revised: 03/24/2006] [Accepted: 04/04/2006] [Indexed: 11/18/2022]
Abstract
Candida antarctica lipase B (CalB) is an important catalyst in bio-organic synthesis. To optimize its performance, either the reaction medium is changed or the lipase itself is modified. In the latter case, mutants are generated in Eschericha coli and subsequently expressed in fungal hosts for their characterization. Here we present the functional expression of CalB in the periplasm of E. coli. By step-wise deletion of the CalB signal and propeptide we were able to express and purify two different variants of CalB (mature CalB and CalB with its propeptide). A N-terminal FLAG and a C-terminal His tag were used for the purification. For the substrates para-nitrophenol butyrate (p-NPB), para-nitrophenol laurate (p-NPL) and carboxyfluorescein diacetate (CFDA) the specific activity was shown to be similar to CalB expressed in Aspergillus oryzae. The kinetic constants k(M), v(max) and k(cat) were determined using the substrates p-NPB and p-NPL. Almost identical k(cat)/k(M) values (0.423-0.466 min(-1) microM(-1) for p-NPB and 0.068-0.071 min(-1) microM(-1) for p-NPL) were obtained for the CalB variants from E. coli and A. oryzae. The results clearly show that CalB can be functionally expressed in E. coli and that the attachment of tags does not alter the properties of the lipase.
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Affiliation(s)
- Kerstin Blank
- Lehrstuhl für Angewandte Physik & Center for Nanoscience, LMU München, Amalienstrasse 54, 80799 München, Germany
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47
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Investigation of lipases from various Carica papaya varieties for hydrolysis of olive oil and kinetic resolution of (R,S)-profen 2,2,2-trifluoroethyl thioesters. Process Biochem 2006. [DOI: 10.1016/j.procbio.2005.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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49
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Matsuda T, Tsuji K, Kamitanaka T, Harada T, Nakamura K, Ikariya T. Rate Enhancement of Lipase-catalyzed Reaction in Supercritical Carbon Dioxide. CHEM LETT 2005. [DOI: 10.1246/cl.2005.1102] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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50
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Magnusson AO, Takwa M, Hamberg A, Hult K. AnS-Selective Lipase Was Created by Rational Redesign and the Enantioselectivity Increased with Temperature. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500971] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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