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Tocco D, Carucci C, Todde D, Shortall K, Otero F, Sanjust E, Magner E, Salis A. Enzyme immobilization on metal organic frameworks: Laccase from Aspergillus sp. is better adapted to ZIF-zni rather than Fe-BTC. Colloids Surf B Biointerfaces 2021; 208:112147. [PMID: 34634655 DOI: 10.1016/j.colsurfb.2021.112147] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 11/27/2022]
Abstract
Laccase from Aspergillus sp. (LC) was immobilized within Fe-BTC and ZIF-zni metal organic frameworks through a one-pot synthesis carried out under mild conditions (room temperature and aqueous solution). The Fe-BTC, ZIF-zni MOFs, and the LC@Fe-BTC, LC@ZIF-zni immobilized LC samples were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The kinetic parameters (KM and Vmax) and the specific activity of the free and immobilized laccase were determined. Immobilized LCs resulted in a lower specific activity compared with that of the free LC (7.7 µmol min-1 mg-1). However, LC@ZIF-zni was almost 10 times more active than LC@Fe-BTC (1.32 µmol min-1 mg-1 vs 0.17 µmol min-1 mg-1) and only 5.8 times less active than free LC. The effect of enzyme loading showed that LC@Fe-BTC had an optimal loading of 45.2 mg g-1, at higher enzyme loadings the specific activity decreased. In contrast, the specific activity of LC@ZIF-zni increased linearly over the loading range investigated. The storage stability of LC@Fe-BTC was low with a significant decrease in activity after 5 days, while LC@ZIF retained up to 50% of its original activity after 30 days storage. The difference in activity and stability between LC@Fe-BTC and LC@ZIF-zni is likely due to release of Fe3+ and the low stability of Fe-BTC MOF. Together, these results indicate that ZIF-zni is a superior support for the immobilization of laccase.
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Affiliation(s)
- Davide Tocco
- Department of Chemical and Geological Sciences, University of Cagliari, and Centro NanoBiotecnologie Sardegna (CNBS), Cittadella Universitaria, SS 554 bivio Sestu, 09042, Monserrato (CA), Italy; Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy; Unità Operativa University of Cagliari, Italy; Cittadella Universitaria, SS 554 bivio Sestu, 09042 Monserrato (CA), Italy
| | - Cristina Carucci
- Department of Chemical and Geological Sciences, University of Cagliari, and Centro NanoBiotecnologie Sardegna (CNBS), Cittadella Universitaria, SS 554 bivio Sestu, 09042, Monserrato (CA), Italy; Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy; Unità Operativa University of Cagliari, Italy; Cittadella Universitaria, SS 554 bivio Sestu, 09042 Monserrato (CA), Italy.
| | - Debora Todde
- Department of Chemical and Geological Sciences, University of Cagliari, and Centro NanoBiotecnologie Sardegna (CNBS), Cittadella Universitaria, SS 554 bivio Sestu, 09042, Monserrato (CA), Italy
| | - Kim Shortall
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Fernando Otero
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Enrico Sanjust
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, SS 554 bivio Sestu, 09042 Monserrato (CA), Italy; Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy; Unità Operativa University of Cagliari, Italy; Cittadella Universitaria, SS 554 bivio Sestu, 09042 Monserrato (CA), Italy
| | - Edmond Magner
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
| | - Andrea Salis
- Department of Chemical and Geological Sciences, University of Cagliari, and Centro NanoBiotecnologie Sardegna (CNBS), Cittadella Universitaria, SS 554 bivio Sestu, 09042, Monserrato (CA), Italy; Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase (CSGI), via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy; Unità Operativa University of Cagliari, Italy; Cittadella Universitaria, SS 554 bivio Sestu, 09042 Monserrato (CA), Italy.
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Agroindustrial Wastes as a Support for the Immobilization of Lipase from Thermomyces lanuginosus: Synthesis of Hexyl Laurate. Biomolecules 2021; 11:biom11030445. [PMID: 33802693 PMCID: PMC8002546 DOI: 10.3390/biom11030445] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/13/2021] [Accepted: 03/14/2021] [Indexed: 01/18/2023] Open
Abstract
As a consequence of intense industrialization in the last few decades, the amount of agro-industrial wastes has increasing, where new forms of valorization are crucial. In this work, five residual biomasses from Maranhão (Brazil) were investigated as supports for immobilization of lipase from Thermomyces lanuginosus (TLL). The new biocatalysts BM-TLL (babaçu mesocarp) and RH-TLL (rice husk) showed immobilization efficiencies >98% and hydrolytic activities of 5.331 U g-1 and 4.608 U g-1, respectively, against 142 U g-1 by Lipozyme® TL IM. High esterification activities were also found, with 141.4 U g-1 and 396.4 U g-1 from BM-TLL and RH-TLL, respectively, against 113.5 U g-1 by TL IM. Results of porosimetry, SEM, and BET demonstrated BM and RH supports are mesoporous materials with large hydrophobic area, allowing a mixture of hydrophobic adsorption and confinement, resulting in hyperactivation of TLL. These biocatalysts were applied in the production of hexyl laurate, where RH-TLL was able to generate 94% conversion in 4 h. Desorption with Triton X-100 and NaCl confirmed that new biocatalysts were more efficient with 5 times less protein than commercial TL IM. All results demonstrated that residual biomass was able to produce robust and stable biocatalysts containing immobilized TLL with better results than commercial preparations.
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Silvestrini L, Cianci M. Principles of lipid-enzyme interactions in the limbus region of the catalytic site of Candida antarctica Lipase B. Int J Biol Macromol 2020; 158:358-363. [PMID: 32380114 DOI: 10.1016/j.ijbiomac.2020.04.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 03/30/2020] [Accepted: 04/07/2020] [Indexed: 11/25/2022]
Abstract
Lipases (E.C. 3.1.1.3) are ubiquitous hydrolases for the carboxyl ester bond of water-insoluble substrates such as triacylglycerols and phospholipids. Candida antarctica Lipase B (CALB) acts in aqueous as well as in low-water media, thus being of considerable biochemical significance with high interest also for its industrial applications. The hydrolysis reaction follows a two-step mechanism, or 'interfacial activation', with adsorption of the enzyme to a heterogeneous interface and subsequent enhancement of the lipolytic activity. Once positioned within the catalytic triad, substrates are then hydrolysed, and products released. However, the intermediate steps of substrate transfer from the lipidic-aqueous phase to the enzyme surface and then down to the catalytic site are still unclear. By inhibiting CALB with ethyl phosphonate and incubating with glyceryl tributyrate (2,3-di(butanoyloxy)propyl butanoate), the crystal structure of the lipid-enzyme complex, at 1.55 Å resolution, shows the tributyrin in the limbus region of active site. The substrate is found 10 Å above the catalytic Ser, with the glycerol backbone pre-aligned for further processing by key interactions via an extended water network with α-helix10 and α-helix5. The findings offer new elements to elucidate the mechanism of substrate recognition, transfer and catalysis of Candida antarctica Lipase B (CALB) and lipases in general.
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Affiliation(s)
- Lucia Silvestrini
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Michele Cianci
- Department of Agricultural, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
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Lipase Production by Solid-State Cultivation of Thermomyces Lanuginosus on By-Products from Cold-Pressing Oil Production. Processes (Basel) 2019. [DOI: 10.3390/pr7070465] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study shows that by-products obtained after cold-pressing oil production (flex oil cake, hemp oil cake, hull-less pumpkin oil cake) could be used as substrates for the sustainable and cost-effective production of lipase when cultivating Thermomyces lanuginosus under solid-state conditions (T = 45 °C, t = 9 days). Lipase showed optimum activity at T = 40 °C. The produced lipase extract was purified 17.03-folds with a recovery of 1% after gel chromatography. Three different batch experiments were performed in order to test the possibility of using the lipase in biodiesel production. Experiments were performed with a commercial, unpurified enzyme, and partially purified lipase with sunflower oil and methanol as substrates in a batch reactor at 40 °C. During the experiments, the operational stability of the enzyme was studied. The obtained results clearly showed that produced crude and purified lipase can be used for biodiesel production, but the process needs some additional optimization. As for operation stability, it was noticed that the commercial enzyme was deactivated after 30 h, while produced crude enzyme remained 8.25% of its activity after 368 h.
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Graphene oxide enabled long-term enzymatic transesterification in an anhydrous gas flux. Nat Commun 2019; 10:2684. [PMID: 31213607 PMCID: PMC6582274 DOI: 10.1038/s41467-019-10686-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 05/19/2019] [Indexed: 11/25/2022] Open
Abstract
Gas-phase enzymatic catalysis has been long pursued but not yet utilized in industrial processes due to many limitations. Herein, we report a hydroxyl-rich graphene oxide (GO) aerogel that can preserve the enzymatic activity and stability in an anhydrous gas flow by providing a water-like microenvironment. Lipase immobilized in the GO aerogel exhibits a 5 to 10-fold increase in apparent activity than the lyophilized lipase powder in transesterification of geraniol and vinyl acetate in the gas phase and maintains the initial activity for more than 500 h. The solid-state circular dichroism measurement confirms that the lipase keeps its native conformation in the aerogel, and the thermogravimetric analysis shows that water molecules essential for the lipase activity can be replaced by the hydroxyl groups at the GO surface. The versatility of this method is demonstrated for two other lipases with different structures, promising unprecedented applications of enzyme-GO aerogels to gas-phase enzymatic catalysis. Implementing enzymatic reactions in gas phase has several limitations. Here, the authors report on a method to overcome these using graphene oxide aerogels to immobilize lipase, improve stability/lifetime and investigate the mechanism for improved function.
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Luna C, Luna D, Bautista FM, Estevez R, Calero J, Posadillo A, Romero AA, Sancho ED. Application of Enzymatic Extracts from a CALB Standard Strain as Biocatalyst within the Context of Conventional Biodiesel Production Optimization. Molecules 2017; 22:molecules22112025. [PMID: 29160848 PMCID: PMC6150231 DOI: 10.3390/molecules22112025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/16/2017] [Accepted: 11/18/2017] [Indexed: 11/16/2022] Open
Abstract
The application of biocatalysts in the transesterification process of triglycerides (TG) allows integrating the glycerol in the form of monoglyceride (MG), sharply increasing the yield and the environmental sustainability of the conventional biodiesel production process. This is known as Ecodiesel. To overcome the inconvenient of the high cost of the currently employed highly purified commercial enzymes, the use of scarcely purified extracts obtained from standard strains of the same species of commercial lipases currently applied in this process is being investigated. Thus, Candida antarctica type B (CALB) was chosen to determine the optimal conditions of culture of this yeast. The standard strain was obtained from the Spanish Type Microbial Cultures Collection (CECT) and has been used to carry out several studies to elucidate its optimum growth conditions. Through a process of lyophilization with prior dialysis of the liquid cultures, the enzymatic extracts were obtained. The different obtained cultures have been applied as biocatalysts in the 1,3-selective transesterification reaction of sunflower oil with ethanol to obtain Ecodiesel (FAEE + MG). Selectivity and reaction yields were obtained by gas chromatography. Acceptable yields are obtained during the reaction time as well as in successive reactions, demonstrating the feasibility of using these CALB enzymatic extracts as biocatalysts.
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Affiliation(s)
- Carlos Luna
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Diego Luna
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Felipa M Bautista
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Rafael Estevez
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Juan Calero
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Alejandro Posadillo
- Seneca Green Catalyst S.L., Rabanales XXI/University of Cordoba, Cordoba 14014, Spain.
| | - Antonio A Romero
- Department of Organic Chemistry, University of Cordoba (UCO), Cordoba 14014, Spain.
| | - Enrique D Sancho
- Department of Microbiology, University of Cordoba, Campus de Rabanales, Ed. Severo Ochoa, 14014 Cordoba, Spain.
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Weiser D, Sóti PL, Bánóczi G, Bódai V, Kiss B, Gellért Á, Nagy ZK, Koczka B, Szilágyi A, Marosi G, Poppe L. Bioimprinted lipases in PVA nanofibers as efficient immobilized biocatalysts. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Lipase immobilization on hyroxypropyl methyl cellulose support and its applications for chemo-selective synthesis of β-amino ester compounds. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.07.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Vescovi V, Rojas MJ, Baraldo A, Botta DC, Santana FAM, Costa JP, Machado MS, Honda VK, de Lima Camargo Giordano R, Tardioli PW. Lipase-Catalyzed Production of Biodiesel by Hydrolysis of Waste Cooking Oil Followed by Esterification of Free Fatty Acids. J AM OIL CHEM SOC 2016. [DOI: 10.1007/s11746-016-2901-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Abaházi E, Lestál D, Boros Z, Poppe L. Tailoring the Spacer Arm for Covalent Immobilization of Candida antarctica Lipase B-Thermal Stabilization by Bisepoxide-Activated Aminoalkyl Resins in Continuous-Flow Reactors. Molecules 2016; 21:molecules21060767. [PMID: 27304947 PMCID: PMC6274432 DOI: 10.3390/molecules21060767] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 11/18/2022] Open
Abstract
An efficient and easy-to-perform method was developed for immobilization of CaLB on mesoporous aminoalkyl polymer supports by bisepoxide activation. Polyacrylate resins (100–300 µm; ~50 nm pores) with different aminoalkyl functional groups (ethylamine: EA and hexylamine: HA) were modified with bisepoxides differing in the length, rigidity and hydrophobicity of the units linking the two epoxy functions. After immobilization, the different CaLB preparations were evaluated using the lipase-catalyzed kinetic resolution (KR) of racemic 1-phenylethanol (rac-1) in batch mode and in a continuous-flow reactor as well. Catalytic activity, enantiomer selectivity, recyclability, and the mechanical and long-term stability of CaLB immobilized on the various supports were tested. The most active CaLB preparation (on HA-resin activated with 1,6-hexanediol diglycidyl ether—HDGE) retained 90% of its initial activity after 13 consecutive reaction cycles or after 12 month of storage at 4 °C. The specific rate (rflow), enantiomer selectivity (E) and enantiomeric excess (ee) achievable with the best immobilized CaLB preparations were studied as a function of temperature in kinetic resolution of rac-1 performed in continuous-flow packed-bed bioreactors. The optimum temperature of the most active HA-HDGE CaLB in continuous-flow mode was 60 °C. Although CaLB immobilized on the glycerol diglycidyl ether (GDGE)-activated EA-resin was less active and less selective, a much higher optimum temperature (80 °C) was observed with this form in continuous-flow mode KR of rac-1.
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Affiliation(s)
- Emese Abaházi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary.
| | - Dávid Lestál
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary.
| | - Zoltán Boros
- SynBiocat LLC; Lövőház u. 19/1, Budapest H-1043, Hungary.
| | - László Poppe
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary.
- SynBiocat LLC; Lövőház u. 19/1, Budapest H-1043, Hungary.
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Improved Performance of Lipase Immobilized on Tannic Acid-Templated Mesoporous Silica Nanoparticles. Appl Biochem Biotechnol 2016; 179:1155-69. [DOI: 10.1007/s12010-016-2056-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 03/15/2016] [Indexed: 12/21/2022]
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12
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Badgujar KC, Bhanage BM. Immobilization of lipase on biocompatible co-polymer of polyvinyl alcohol and chitosan for synthesis of laurate compounds in supercritical carbon dioxide using response surface methodology. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.04.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mangas-Sánchez J, Adlercreutz P. Highly efficient enzymatic biodiesel production promoted by particle-induced emulsification. BIOTECHNOLOGY FOR BIOFUELS 2015; 8:58. [PMID: 25873996 PMCID: PMC4396811 DOI: 10.1186/s13068-015-0247-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/26/2015] [Indexed: 05/06/2023]
Abstract
BACKGROUND At present, the conversion of oils to biodiesel is predominantly carried out using chemical catalysts. However, the corresponding lipase-catalysed process has important advantages, which include mild reaction conditions and the possibility of using cheap, low quality feedstocks with a high free fatty acid content. Further increases in the efficiency of the enzymatic process are desired to make it even more attractive and suitable for large-scale applications. RESULTS Herein, we present a simple and efficient two-phase lipase-catalysed system for the preparation of biodiesel in which different parameters (biocatalyst composition, ethanol concentration and the presence of additives) were optimised in order to obtain the maximum productivity starting from triolein with a high free oleic acid content. In the two-phase system, the enzyme tolerated high-ethanol concentrations, which made it possible to reach high conversions. The addition of silica particles increased the reaction rate substantially. It was suggested that such particles can catalyse acyl migration as a step to the full conversion to glycerol and biodiesel. However, in the system studied here, the effect of the particles was shown to be due to the formation of smaller and more uniform emulsion droplets leading to better mass transfer between the two phases. Particles of widely different size had positive effects, and the highest rate was obtained with silica particles derivatised with phenyl groups. The optimal conditions were applied to the solvent-free ethanolysis of rapeseed oil, and a yield of 96% was reached in 5 h. Under the mild conditions used, chemical catalysts were inefficient. CONCLUSIONS Triacylglycerol oils with a high free fatty acid content can be efficiently converted to ethyl esters using Thermomyces lanuginosus lipase as the catalyst in an aqueous/organic two-phase system. Fast mass transfer can be achieved using silica particles, which helped to decrease the size of the emulsion droplets and thus led to a more efficient process. The high-ethanol concentration tolerated by the lipase in this system made it possible to reach almost quantitative yields.
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Affiliation(s)
- Juan Mangas-Sánchez
- Department of Biotechnology, Lund University, P.O. Box 124, Lund, SE-221 00 Sweden
| | - Patrick Adlercreutz
- Department of Biotechnology, Lund University, P.O. Box 124, Lund, SE-221 00 Sweden
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Badgujar KC, Bhanage BM. The Solvent Stability Study with Thermodynamic Analysis and Superior Biocatalytic Activity of Burkholderia cepacia Lipase Immobilized on Biocompatible Hybrid Matrix of Polyvinyl Alcohol and Hypromellose. J Phys Chem B 2014; 118:14808-19. [DOI: 10.1021/jp5093493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Badgujar KC, Bhanage BM. Enhanced Biocatalytic Activity of Lipase Immobilized on Biodegradable Copolymer of Chitosan and Polyvinyl Alcohol Support for Synthesis of Propionate Ester: Kinetic Approach. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501304e] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Kirtikumar C. Badgujar
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai-400 019, India
| | - Bhalchandra M. Bhanage
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai-400 019, India
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Villo L, Metsala A, Tamp S, Parve J, Vallikivi I, Järving I, Samel N, Lille Ü, Pehk T, Parve O. Thermomyces lanuginosusLipase with Closed Lid Catalyzes Elimination of Acetic Acid from 11-Acetyl-Prostaglandin E2. ChemCatChem 2014. [DOI: 10.1002/cctc.201400019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Cesarini S, Infanzón B, Pastor FIJ, Diaz P. Fast and economic immobilization methods described for non-commercial Pseudomonas lipases. BMC Biotechnol 2014; 14:27. [PMID: 24755191 PMCID: PMC4003287 DOI: 10.1186/1472-6750-14-27] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 04/09/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND There is an increasing interest to seek new enzyme preparations for the development of new products derived from bioprocesses to obtain alternative bio-based materials. In this context, four non-commercial lipases from Pseudomonas species were prepared, immobilized on different low-cost supports, and examined for potential biotechnological applications. RESULTS To reduce costs of eventual scaling-up, the new lipases were obtained directly from crude cell extracts or from growth culture supernatants, and immobilized by simple adsorption on Accurel EP100, Accurel MP1000 and Celite®545. The enzymes evaluated were LipA and LipC from Pseudomonas sp. 42A2, a thermostable mutant of LipC, and LipI.3 from Pseudomonas CR611, which were produced in either homologous or heterologous hosts. Best immobilization results were obtained on Accurel EP100 for LipA and on Accurel MP1000 for LipC and its thermostable variant. Lip I.3, requiring a refolding step, was poorly immobilized on all supports tested (best results for Accurel MP1000). To test the behavior of immobilized lipases, they were assayed in triolein transesterification, where the best results were observed for lipases immobilized on Accurel MP1000. CONCLUSIONS The suggested protocol does not require protein purification and uses crude enzymes immobilized by a fast adsorption technique on low-cost supports, which makes the method suitable for an eventual scaling up aimed at biotechnological applications. Therefore, a fast, simple and economic method for lipase preparation and immobilization has been set up. The low price of the supports tested and the simplicity of the procedure, skipping the tedious and expensive purification steps, will contribute to cost reduction in biotechnological lipase-catalyzed processes.
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Affiliation(s)
- Silvia Cesarini
- Department of Microbiology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Belén Infanzón
- Department of Microbiology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - F I Javier Pastor
- Department of Microbiology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Pilar Diaz
- Department of Microbiology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
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Nordblad M, Adlercreutz P. Immobilisation procedure and reaction conditions for optimal performance ofCandida antarcticalipase B in transesterification and hydrolysis. BIOCATAL BIOTRANSFOR 2013. [DOI: 10.3109/10242422.2013.837240] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Lipase from Pseudomonas stutzeri: Purification, homology modelling and rational explanation of the substrate binding mode. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.11.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Preparation and application of epoxy–chitosan/alginate support in the immobilization of microbial lipases by covalent attachment. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2012.08.023] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Evaluation of immobilized lipases on poly-hydroxybutyrate beads to catalyze biodiesel synthesis. Int J Biol Macromol 2012; 50:503-11. [DOI: 10.1016/j.ijbiomac.2012.01.020] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 01/10/2012] [Accepted: 01/12/2012] [Indexed: 11/23/2022]
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Naya M, Imai M. Regulation of the hydrolysis reactivity of immobilizedCandida rugosalipase with the aid of a hydrophobic porous carrier. ASIA-PAC J CHEM ENG 2012. [DOI: 10.1002/apj.1631] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masakazu Naya
- Graduate School of Bioresource Sciences; Nihon University; 1866 Kameino Fujisawa Kanagawa-pref. 252-0880 Japan
| | - Masanao Imai
- Graduate School of Bioresource Sciences; Nihon University; 1866 Kameino Fujisawa Kanagawa-pref. 252-0880 Japan
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Impact of Physicochemical Character of Hydrophobic Porous Carrier on Reactivity of Immobilized Lipase Progressing Toward Higher Reaction Rate and High Yield in Repeated Use. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proeng.2012.07.492] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Novel and highly effective chemoenzymatic synthesis of (2R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]butylpropanoate based on lipase mediated transesterification. Biotechnol Lett 2011; 34:709-15. [DOI: 10.1007/s10529-011-0820-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 11/29/2011] [Indexed: 10/14/2022]
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26
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Improving catalytic performance of Burkholderia cepacia lipase immobilized on macroporous resin NKA. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.03.007] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Immobilization and stabilization of microbial lipases by multipoint covalent attachment on aldehyde-resin affinity: Application of the biocatalysts in biodiesel synthesis. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2010.10.002] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Forde J, Vakurov A, Gibson TD, Millner P, Whelehan M, Marison IW, Ó’Fágáin C. Chemical modification and immobilisation of lipase B from Candida antarctica onto mesoporous silicates. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcatb.2010.05.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Salis A, Cugia F, Setzu S, Mula G, Monduzzi M. Effect of oxidation level of n+-type mesoporous silicon surface on the adsorption and the catalytic activity of Candida rugosa lipase. J Colloid Interface Sci 2010; 345:448-53. [DOI: 10.1016/j.jcis.2010.01.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 01/18/2010] [Accepted: 01/22/2010] [Indexed: 10/19/2022]
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30
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Salis A, Casula M, Bhattacharyya M, Pinna M, Solinas V, Monduzzi M. Physical and Chemical Lipase Adsorption on SBA-15: Effect of Different Interactions on Enzyme Loading and Catalytic Performance. ChemCatChem 2010. [DOI: 10.1002/cctc.200900288] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Efficient decolorization of an anthraquinone dye by recombinant dye-decolorizing peroxidase (rDyP) immobilized in silica-based mesocellular foam. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcatb.2009.11.007] [Citation(s) in RCA: 18] [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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32
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Katsoura MH, Polydera AC, Tsironis LD, Petraki MP, Rajačić SK, Tselepis AD, Stamatis H. Efficient enzymatic preparation of hydroxycinnamates in ionic liquids enhances their antioxidant effect on lipoproteins oxidative modification. N Biotechnol 2009; 26:83-91. [DOI: 10.1016/j.nbt.2009.02.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Revised: 02/12/2009] [Accepted: 02/26/2009] [Indexed: 10/21/2022]
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33
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Reyes-Duarte D, López-Cortés N, Ferrer M, Plou FJ, Ballesteros A. Parameters affecting productivity in the lipase-catalysed synthesis of sucrose palmitate. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420500071763] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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34
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Salis A, Sanjust E, Solinas V, Monduzzi M. Commercial lipase immobilization on Accurel MP 1004 porous polypropylene. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420500296337] [Citation(s) in RCA: 8] [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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35
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Lozano P, De Diego T, Gmouh S, Vaultier M, Iborra JL. Dynamic structure–function relationships in enzyme stabilization by ionic liquids. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420500198657] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Salis A, Pisano M, Monduzzi M, Solinas V, Sanjust E. Laccase from Pleurotus sajor-caju on functionalised SBA-15 mesoporous silica: Immobilisation and use for the oxidation of phenolic compounds. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.12.008] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Laszlo JA, Evans KO. Influence of cosolvents on the hydrophobic surface immobilization topography of Candida antarctica lipase B. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Salis A, Bhattacharyya MS, Monduzzi M, Solinas V. Role of the support surface on the loading and the activity of Pseudomonas fluorescens lipase used for biodiesel synthesis. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.09.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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Regla I, Luviano-Jardón A, Demare P, Hong E, Torres-Gavilán A, López-Munguía A, Castillo E. Chemoenzymatic synthesis of the potential antihypertensive agent (2R,2′S)-β-hydroxyhomometoprolol. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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40
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Decolorization of an anthraquinone dye by the recombinant dye-decolorizing peroxidase (rDyP) immobilized on mesoporous materials. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2007.12.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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41
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Comparison among immobilised lipases on macroporous polypropylene toward biodiesel synthesis. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2007.12.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Ong AL, Kamaruddin AH, Bhatia S, Aboul-Enein HY. Enantioseparation of (R,S)-ketoprofen usingCandida antarcticalipase B in an enzymatic membrane reactor. J Sep Sci 2008; 31:2476-85. [DOI: 10.1002/jssc.200800086] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Joseph B, Ramteke PW, Thomas G. Cold active microbial lipases: some hot issues and recent developments. Biotechnol Adv 2008; 26:457-70. [PMID: 18571355 DOI: 10.1016/j.biotechadv.2008.05.003] [Citation(s) in RCA: 267] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 05/09/2008] [Indexed: 10/22/2022]
Abstract
Lipases are glycerol ester hydrolases that catalyze the hydrolysis of triglycerides to free fatty acids and glycerol. Lipases catalyze esterification, interesterification, acidolysis, alcoholysis and aminolysis in addition to the hydrolytic activity on triglycerides. The temperature stability of lipases has regarded as the most important characteristic for use in industry. Psychrophilic lipases have lately attracted attention because of their increasing use in the organic synthesis of chiral intermediates due to their low optimum temperature and high activity at very low temperatures, which are favorable properties for the production of relatively frail compounds. In addition, these enzymes have an advantage under low water conditions due to their inherent greater flexibility, wherein the activity of mesophilic and thermophilic enzymes are severely impaired by an excess of rigidity. Cold-adapted microorganisms are potential source of cold-active lipases and they have been isolated from cold regions and studied. Compared to other lipases, relatively smaller numbers of cold active bacterial lipases were well studied. Lipases isolated from different sources have a wide range of properties depending on their sources with respect to positional specificity, fatty acid specificity, thermostability, pH optimum, etc. Use of industrial enzymes allows the technologist to develop processes that closely approach the gentle, efficient processes in nature. Some of these processes using cold active lipase from C. antarctica have been patented by pharmaceutical, chemical and food industries. Cold active lipases cover a broad spectrum of biotechnological applications like additives in detergents, additives in food industries, environmental bioremediations, biotransformation, molecular biology applications and heterologous gene expression in psychrophilic hosts to prevent formation of inclusion bodies. Cold active enzymes from psychrotrophic microorganisms showing high catalytic activity at low temperatures can be highly expressed in such recombinant strains. Thus, cold active lipases are today the enzymes of choice for organic chemists, pharmacists, biophysicists, biochemical and process engineers, biotechnologists, microbiologists and biochemists.
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Affiliation(s)
- Babu Joseph
- Department of Microbiology and Microbial Technology, College of Biotechnology and Allied Sciences, Allahabad Agricultural Institute-Deemed University, Uttar Pradesh, India
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44
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Torres P, Reyes-Duarte D, López-Cortés N, Ferrer M, Ballesteros A, Plou FJ. Acetylation of vitamin E by Candida antarctica lipase B immobilized on different carriers. Process Biochem 2008. [DOI: 10.1016/j.procbio.2007.11.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Enzymatic hydrolysis of soybean oil using lipase from different sources to yield concentrated of polyunsaturated fatty acids. World J Microbiol Biotechnol 2007; 23:1725-31. [DOI: 10.1007/s11274-007-9421-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Accepted: 04/18/2007] [Indexed: 10/23/2022]
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46
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Sabbani S, Hedenström E, Nordin O. The enantioselectivity of Candida rugosa lipase is influenced by the particle size of the immobilising support material Accurel. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcatb.2006.05.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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De Diego T, Lozano P, Gmouh S, Vaultier M, Iborra JL. Understanding Structure−Stability Relationships ofCandidaantarticaLipase B in Ionic Liquids. Biomacromolecules 2005; 6:1457-64. [PMID: 15877365 DOI: 10.1021/bm049259q] [Citation(s) in RCA: 204] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two different water-immiscible ionic liquids (ILs), 1-ethyl-3-methylimidizolium bis(trifluoromethylsulfonyl)imide and butyltrimethylammonium bis(trifluoromethylsulfonyl)imide, were used for butyl butyrate synthesis from vinyl butyrate catalyzed by Candida antarctica lipase B (CALB) at 2% (v/v) water content and 50 degrees C. Both the synthetic activity and stability of the enzyme in these ILs were enhanced as compared to those in hexane. Circular dichroism and intrinsic fluorescence spectroscopic techniques have been used over a period of 4 days to determine structural changes in the enzyme associated with differences in its stability for each assayed medium. CALB showed a loss in residual activity higher than 75% after 4 days of incubation in both water and hexane media at 50 degrees C, being related to great changes in both alpha-helix and beta-strand secondary structures. The stabilization of CALB, which was observed in the two ILs studied, was associated with both the maintenance of the 50% of initial alpha-helix content and the enhancement of beta-strands. Furthermore, intrinsic fluorescence studies clearly showed how a classical enzyme unfolding was occurring with time in both water and hexane media. However, the structural changes associated with the incubation of the enzyme in both ILs might be attributed to a compact and active enzyme conformation, resulting in an enhancement of the stability in these nonaqueous environments.
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Affiliation(s)
- Teresa De Diego
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
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48
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Böer E, Mock HP, Bode R, Gellissen G, Kunze G. An extracellular lipase from the dimorphic yeastArxula adeninivorans: molecular cloning of theALIP1 gene and characterization of the purified recombinant enzyme. Yeast 2005; 22:523-35. [PMID: 15942926 DOI: 10.1002/yea.1230] [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] [Indexed: 11/08/2022] Open
Abstract
The lipase-encoding Arxula adeninivorans ALIP1 gene was isolated using fragments of lipase isolates obtained by trypsin digestion for the definition of oligonucleotide primers in a PCR screening approach. The gene harbours an ORF of 1347 bp encoding a 420 amino acid protein of some 50 kDa preceded by an N-terminal 28 prepro-secretion sequence. The deduced amino acid sequence was found to be similar to the lipases from Candida albicans and C. parapsilosis (34-38% identity) and more distantly related to other lipases. The sequence contains the consensus pentapeptide motif (-Gly-X-Ser-X-Gly-) that forms a part of the interfacial lipid recognition site in lipases. The expression of the gene is regulated by carbon source. In media supplemented with Tween 20, induction of the ALIP1 gene and accumulation of the encoded lipase in the medium is observed, thus demonstrating gene regulation by lipophilic compounds. The enzyme characteristics are analysed from isolates of native strains as well as from those of recombinant strains expressing the ALIP1 gene under control of the strong A. adeninivorans-derived TEF1 promoter. For both proteins a molecular mass of 100 kDa was determined, indicating a dimeric structure, a pH optimum at pH 7.5 and a temperature optimum at 30 degrees C. The enzyme hydrolyses all ester bonds in all triglyceride substrates tested. Middle-sized chain fatty acids are more efficiently hydrolysed than short- and long-chain fatty acids, with the highest activity on C8/C10 fatty acid esters pNP-caprylate, pNP-caprate and tricaprylin.
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Affiliation(s)
- Erik Böer
- Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse 3, D-06466 Gatersleben, Germany
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Prathumpai W, Flitter SJ, McIntyre M, Nielsen J. Lipase production by recombinant strains of Aspergillus niger expressing a lipase-encoding gene from Thermomyces lanuginosus. Appl Microbiol Biotechnol 2004; 65:714-9. [PMID: 15316684 DOI: 10.1007/s00253-004-1699-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2004] [Revised: 06/21/2004] [Accepted: 06/21/2004] [Indexed: 10/26/2022]
Abstract
Two recombinant strains of Aspergillus niger (NW 297-14 and NW297-24) producing a heterologous lipase from Thermomyces lanuginosus were constructed. The heterologous lipase was expressed using the TAKA amylase promoter from Aspergillus oryzae. The production kinetics of the two strains on different carbon sources in batch and carbon-limited chemostat cultivations were evaluated. In batch cultivations, the highest total product yield coefficient (Y(xp total)), given as the sum of extracellular and intracellular yields, was obtained during growth on glucose for the transformant strain NW297-24 (5.7+/-0.65 KU/g DW), whereas the highest total product yield coefficient was obtained during growth on maltose for the transformant strain NW297-14 (6.3+/-0.02 KU/g DW). Both transformants were evaluated in glucose-limited chemostat cultures. Strain NW297-14 was found to be the best producer and was thus employed for further analysis of the influence of carbon source in chemostat cultures. Here, the highest total specific lipase productivity (r(p total), the sum of extracellular and intracellular lipase productivity) was found to be 1.60+/-0.81 KU/g DW/h in maltose-limited chemostats at a dilution rate of 0.08 h(-1), compared with a total specific lipase productivity of 1.10+/-0.41 KU/g DW/h in glucose-limited chemostats. At the highest specific productivity obtained in this study, the heterologous enzyme accounted for about 1% of all cellular protein being produced by the cells, which shows that it is possible to obtain high productivities of heterologous fungal enzymes in A. niger. However, SDS-PAGE analysis showed that most of the produced lipase was bound to the cell wall.
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Affiliation(s)
- Wai Prathumpai
- BioCentrum-DTU, Center for Microbial Biotechnology, Technical University of Denmark, Building 223, 2800 Lyngby, Denmark
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50
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Blanco RM, Terreros P, Fernández-Pérez M, Otero C, Dı́az-González G. Functionalization of mesoporous silica for lipase immobilization. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcatb.2004.03.012] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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