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Urea removal in rosé and red wines by immobilised acid urease in a packed bed reactor. FOOD AND BIOPRODUCTS PROCESSING 2021. [DOI: 10.1016/j.fbp.2020.12.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Increased thermal stability of a glucose oxidase biosensor under high hydrostatic pressure. Enzyme Microb Technol 2020; 134:109486. [DOI: 10.1016/j.enzmictec.2019.109486] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 11/15/2019] [Accepted: 12/05/2019] [Indexed: 12/13/2022]
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3
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Godoy CA. New Strategy for the Immobilization of Lipases on Glyoxyl-Agarose Supports: Production of Robust Biocatalysts for Natural Oil Transformation. Int J Mol Sci 2017; 18:ijms18102130. [PMID: 29023423 PMCID: PMC5666812 DOI: 10.3390/ijms18102130] [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: 09/01/2017] [Revised: 10/08/2017] [Accepted: 10/09/2017] [Indexed: 01/18/2023] Open
Abstract
Immobilization on Glyoxyl–agarose support (Gx) is one of the best strategies to stabilize enzymes. However, the strategy is difficult to apply at neutral pH when most enzymes are stable and, even when possible, produces labile derivatives. This work contributes to overcoming this hurdle through a strategy that combines solid-phase amination, presence of key additives, and derivative basification. To this end, aminated industrial lipases from Candida artarctica (CAL), Thermomyces lunuginosus (TLL), and the recombinant Geobacillus thermocatenulatus (BTL2) were immobilized on Gx for the first time at neutral pH using anthranilic acid (AA) or DTT as additives (immobilization yields >70%; recovered activities 37.5–76.7%). The spectroscopic evidence suggests nucleophilic catalysis and/or adsorption as the initial lipase immobilization events. Subsequent basification drastically increases the stability of BTL2–glyoxyl derivatives under harsh conditions (t1/2, from 2.1–54.5 h at 70 °C; from 10.2 h–140 h in 80% dioxane). The novel BTL2-derivatives were active and selective in fish oil hydrolysis (1.0–1.8 μmol of polyunsaturated fatty acids (PUFAs) min−1·g−1) whereas the selected TLL-derivative was as active and stable in biodiesel production (fatty ethyl esters, EE) as the commercial Novozyme®-435 after ten reaction cycles (~70% EE). Therefore, the potential of the proposed strategy in producing suitable biocatalysts for industrial processes was demonstrated.
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Affiliation(s)
- César A Godoy
- Departamento de Química (LIBB), Grupo de Investigación en Ingeniería de los Procesos Agroalimentarios y Biotecnológicos (GIPAB), Universidad del Valle, C.P. 76001 Cali, Colombia.
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Hanachi P, Jafary F, Jafary F, Motamedi S. Immobilization of the Alkaline Phosphatase on Collagen Surface via Cross-Linking Method. IRANIAN JOURNAL OF BIOTECHNOLOGY 2015; 13:32-38. [PMID: 28959297 DOI: 10.15171/ijb.1203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Collagen, the most abundant protein in the human body, and as an extracellular matrix protein, has an important role in the fiber formation. This feature of the collagen renders establishment of the structural skeleton in tissues. Regarding specific features associated with the collagen, such as, formation of the porous structure, permeability and hydrophilicity, it can also be used as a biocompatible matrix in the enzyme engineering. OBJECTIVES The aim of the present study was to investigate the application of the type I collagen as a matrix for alkaline phosphatase immobilization using cross-linking method. MATERIALS AND METHODS The Alkaline phosphatase was covalently immobilized on collagen matrix by using 1-ethyl-3- (dimethylaminopropyl) carbodiimide hydrochloride (EDC). The source of the alkaline phosphatase was from the bovine intestinal mucous. After that, the activity of the immobilized enzyme was assayed under different experimental conditions. RESULTS The optimum pH was similar to that of the free enzyme, whereas the optimum temperature and thermal stability were shown some increments. The surface topography of the collagen matrix containing immobilized enzyme and ALP (Alkaline phosphatase) deficient was investigated by Atomic-force microscopy (AFM). Images that have been obtained applying AFM show significant differences between uncovered and immobilized enzyme- matrix surface topography. CONCLUSIONS Our findings suggest that type I collagen can be utilized as a matrix for alkaline phosphatase immobilization via cross-linking method.
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Affiliation(s)
- Parichehr Hanachi
- Department of Biotecknology, Biochemistry unite, Alzahra University, Tehran, Iran
| | - Farzaneh Jafary
- Department of Biochemistry Shahid Sadoughy University, Faculty of Medicine, Yazd, Iran
| | - Fariba Jafary
- Young Researchers Club, I.A.U, Falavarjane University, Isfahane, Iran
| | - Shima Motamedi
- School of Veterinary Medicine, Razi University, Kermanshah, Iran
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Raliski BK, Howard CA, Young DD. Site-Specific Protein Immobilization Using Unnatural Amino Acids. Bioconjug Chem 2014; 25:1916-20. [DOI: 10.1021/bc500443h] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Benjamin K. Raliski
- Department of Chemistry, College of William & Mary P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Christina A. Howard
- Department of Chemistry, College of William & Mary P.O. Box 8795, Williamsburg, Virginia 23187, United States
| | - Douglas D. Young
- Department of Chemistry, College of William & Mary P.O. Box 8795, Williamsburg, Virginia 23187, United States
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Liu W, Luo J, Zhuang X, Shen W, Zhang Y, Li S, Hu Y, Huang H. Efficient preparation of enantiopure l-tert-leucine through immobilized penicillin G acylase catalyzed kinetic resolution in aqueous medium. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2013.12.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Vossenberg P, Beeftink R, Stuart MC, Tramper H. Effect of enzyme dehydration on alcalase-catalyzed dipeptide synthesis in near-anhydrous organic media. Biotechnol Prog 2013; 29:870-5. [DOI: 10.1002/btpr.1737] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 03/19/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Petra Vossenberg
- Bioprocess Engineering, Wageningen University; 6700 EV Wageningen The Netherlands
| | - Rik Beeftink
- Bioprocess Engineering, Wageningen University; 6700 EV Wageningen The Netherlands
| | - Martien Cohen Stuart
- Laboratory of Physical Chemistry and Colloid Science; Wageningen University; 6700 EK Wageningen The Netherlands
| | - Hans Tramper
- Bioprocess Engineering, Wageningen University; 6700 EV Wageningen The Netherlands
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Yildirim D, Tükel SS, Alptekin Ö, Alagöz D. Immobilized Aspergillus niger epoxide hydrolases: Cost-effective biocatalysts for the prepation of enantiopure styrene oxide, propylene oxide and epichlorohydrin. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.11.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Yildirim D, Tükel SS, Alagöz D, Alptekin Ö. Preparative-scale kinetic resolution of racemic styrene oxide by immobilized epoxide hydrolase. Enzyme Microb Technol 2011; 49:555-9. [DOI: 10.1016/j.enzmictec.2011.08.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 08/01/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
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Vossenberg P, Beeftink HH, Cohen Stuart MA, Tramper H. Immobilization to prevent enzyme incompatibility with proteases. BIOCATAL BIOTRANSFOR 2011. [DOI: 10.3109/10242422.2011.631213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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11
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Kumari A, Kayastha AM. Immobilization of soybean (Glycine max) α-amylase onto Chitosan and Amberlite MB-150 beads: Optimization and characterization. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2010.12.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Triantafyllou AO, Wehtje E, Adlercreutz P, Mattiasson B. How do additives affect enzyme activity and stability in nonaqueous media? Biotechnol Bioeng 2009; 54:67-76. [PMID: 18634074 DOI: 10.1002/(sici)1097-0290(19970405)54:1<67::aid-bit8>3.0.co;2-w] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The catalytic activities of lyophilized powders of alpha-chymotrypsin and Candida antarctica lipase were found to increase 4- to 8-fold with increasing amounts of either buffer salts or potassium chloride in the enzyme preparation. Increasing amounts of sorbitol in the chymotrypsin preparation produced a modest increase in activity. The additives are basically thought to serve as immobilization matrices, the sorbitol being inferior because of its poor mechanical properties. Besides their role as supports, the buffer species were indispensable for the transesterification activity of chymotrypsin because they prevented perturbations of the pH during the course of the reaction. Hence, increasing amounts of buffer species yielded a 100-fold increase in transesterification activity. Effects of pH changes were not as predominant in the peptide synthesis and the lipase-catalyzed reactions. Immobilization of the protease on celite resulted in a remarkable improvement of transesterification activity as compared to the suspended protease, even in the absence of buffer species. Immobilization of the lipase caused a small improvement of activity. The activity of the immobilized enzymes was further enhanced 3-4 times by including increasing amounts of buffer salts in the preparation.The inclusion of increasing amounts of sodium phosphate or sorbitol to chymotrypsin rendered the catalyst more labile against thermal inactivation. The denaturation temperature decreased with 7 degrees C at the highest content of sodium phosphate, as compared to the temperature obtained for the denaturation of the pure protein. The apparent enthalpy of denaturation increased with increasing contents of the additives. The enhancement of hydration level and flexibility of the macromolecule upon addition of the compounds partly provides the explanation for the observed results.
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Affiliation(s)
- A O Triantafyllou
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, PO Box 124, S-22100 Lund, Sweden.
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14
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Immobilization of α-amylase from mung beans (Vigna radiata) on Amberlite MB 150 and chitosan beads: A comparative study. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcatb.2007.08.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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CORDT SUSANNADE, HENDRICKX MARC, MAESMANS GEERT, TOBBACK PAUL. Immobilized α-amylase from Bacillus licheniformis: a potential enzymic time-temperature integrator for thermal processing. Int J Food Sci Technol 2007. [DOI: 10.1111/j.1365-2621.1992.tb01236.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Hasirci N, Aksoy S, Tumturk H. Activation of poly(dimer acid-co-alkyl polyamine) particles for covalent immobilization of α-amylase. REACT FUNCT POLYM 2006. [DOI: 10.1016/j.reactfunctpolym.2006.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Kumar RSS, Vishwanath K, Singh SA, Rao AA. Entrapment of α-amylase in alginate beads: Single step protocol for purification and thermal stabilization. Process Biochem 2006. [DOI: 10.1016/j.procbio.2006.05.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Rialdi G, Battistel E. Thermodynamics of proteins in unusual environments. Biophys Chem 2006; 126:65-79. [PMID: 16814921 DOI: 10.1016/j.bpc.2006.05.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Revised: 05/26/2006] [Accepted: 05/26/2006] [Indexed: 11/19/2022]
Abstract
Some aspects of protein thermodynamics in unconventional environments are addressed and discussed. Aqueous medium, especially dilute solution is the 'usual' ambient, which mediates all the interactions between protein and nearby molecules. When the water content is low, the surroundings may be considered 'unusual', exerting new stresses on the protein molecule and demanding different responses and property changes. The unusual systems considered in this article are low-water protein environments, including nearly dry state powders, organic solvent dispersions and reverse micelles' inclusions. The changes of hydration experienced by the protein after immobilization on solid supports are emphasized with respect to the free bulk solution state. Finally, the aqueous medium altered by water connectivity perturbing agents (polysaccharides) or in macromolecular crowding conditions (in the presence of polyols) is also considered as highly not ideal protein environments. The different responses elicited by the protein under the stress induced by drastic surrounding alterations may give insights for the controlled exploitation of the protein's biological and thermodynamic properties.
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Amaya-Delgado L, Hidalgo-Lara M, Montes-Horcasitas M. Hydrolysis of sucrose by invertase immobilized on nylon-6 microbeads. Food Chem 2006. [DOI: 10.1016/j.foodchem.2005.07.048] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Stability analysis ofBacillus stearothermopilus L1 lipase fused with a cellulose-binding domain. BIOTECHNOL BIOPROC E 2005. [DOI: 10.1007/bf02931850] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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23
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Rojas-Melgarejo F, Rodríguez-López JN, García-Cánovas F, Antonio García-Ruiz P. Cinnamic carbohydrate esters: new polymeric supports for the immobilization of horseradish peroxidase. Carbohydr Polym 2004. [DOI: 10.1016/j.carbpol.2004.06.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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25
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Danisman T, Tan S, Kacar Y, Ergene A. Covalent immobilization of invertase on microporous pHEMA–GMA membrane. Food Chem 2004. [DOI: 10.1016/j.foodchem.2003.07.015] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Hwang S, Lee KT, Park JW, Min BR, Haam S, Ahn IS, Jung JK. Stability analysis of Bacillus stearothermophilus L1 lipase immobilized on surface-modified silica gels. Biochem Eng J 2004. [DOI: 10.1016/s1369-703x(03)00142-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Raviyan P, Tang J, Rasco BA. Thermal stability of alpha-amylase from Aspergillus oryzae entrapped in polyacrylamide gel. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2003; 51:5462-5466. [PMID: 12926898 DOI: 10.1021/jf020906j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
To determine the suitability as a time-temperature indicator for dielectric pasteurization processes, the thermal stability (50-75 degrees C) of Aspergillus oryzae alpha-amylase immobilized in polyacrylamide gel in phosphate buffer, mashed potatoes, and minced shrimp was examined. Changing the cross-linking agent concentration from 3.3 to 5.3% and adding 2% salt did not markedly affect the thermal stability of the immobilized alpha-amylase. Thermal inactivation was first order, and immobilization generally improved the thermal stability of alpha-amylase. z values of the immobilized system in test food systems were 10.2 degrees C (phosphate buffer), 8.45 degrees C (minced shrimp), and 7.78 degrees C (mashed potatoes).
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Ganapathy R, Manolache S, Sarmadi M, Denes F. Immobilization of papain on cold-plasma functionalized polyethylene and glass surfaces. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2002; 12:1027-49. [PMID: 11787520 DOI: 10.1163/156856201753252543] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Polyethylene and glass surfaces were functionalized under dichlorosilane-RF-cold-plasma environments and were employed as substrates for further in situ derivatization reactions and immobilization of papain. Surface functionality changes of RF-plasma-exposed surfaces were monitored under 40 kHz continuous discharge environments. The nature and morphology of derivatized substrates and the substrates bearing the immobilized enzyme were analyzed using survey and high resolution ESCA, ATR-FTIR, and fluorescence of chemical derivatization techniques. Spacer molecules intercalated between the substrates and the enzyme significantly increased the enzyme activity (comparable with the that of the free enzyme). Computer-aided conformational modeling of the substrate-spacer systems corroborated with experimental data indicated that an optimal distance might exist between the enzyme and the substrate. The activity of free and immobilized papain was monitored using benzoyl arginine ethyl ester assay. The pH data were recorded every 0.3 s over 25 min. The Michaelis-Menten kinetic constants were evaluated for immobilized enzymes. It was shown, that the immobilized papain retains most of its activity after several washing/assay cycles.
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Affiliation(s)
- R Ganapathy
- Center for Plasma-Aided Manufactoring, University of Wisconsin-Madison, 53706, USA
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Drevon GF, Hartleib J, Scharff E, Rüterjans H, Russell AJ. Thermoinactivation of diisopropylfluorophosphatase-containing polyurethane polymers. Biomacromolecules 2002; 2:664-71. [PMID: 11710019 DOI: 10.1021/bm000136p] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The thermoinactivation of native diisopropylfluorophosphatase (DFPase, EC 3.8.2.1) is highly calcium dependent, first-order kinetic. Deactivation is coupled with a simultaneous reduction in beta-sheet content. We report herein our attempts to enhance the thermostability of DFPase by irreversibly incorporating the enzyme into polyurethane polymers. Immobilized DFPase has biphasic deactivation kinetics. Our data demonstrate that the initial rapid deactivationof immobilized DFPase leads to the formation of a hyperstable and still active form of enzyme. Like native DFPase, DFPase-containing polyurethanes exhibit a calcium-dependent thermostability. Since bioplastics cannot be analyzed by spectroscopy, the structural mechanisms involved in thermoinactivation of immobilized DFPase were determined using PEG-modified DFPase. The thermoinactivation profile of highly modified DFPase mirrors the stepwise deactivation pattern of bioplastics. Spectroscopic studies enable a structural analysis of the hyperstable intermediate.
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Affiliation(s)
- G F Drevon
- Department of Chemical and Petroleum Engineering & Center for Biotechnology and Bioengineering, University of Pittsburgh, 1249 Benedum Hall, Pittsburgh, Pennsylvania 15261, USA
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31
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Hill CG, Ghannouchi S, Garcia HS. Lipolysis of butter oil by immobilized lamb pregastric esterase: I. Uniresponse kinetics-pH and temperature effects. J Dairy Sci 2001; 84:1034-43. [PMID: 11384029 DOI: 10.3168/jds.s0022-0302(01)74563-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Lamb pregastric esterase, immobilized by physical adsorption on microporous polypropylene in a hollow fiber reactor, has been employed to effect the continuous hydrolysis of the triglycerides in butter oil. Experimental data were obtained at temperatures from 35 to 45 degrees C and pH values from 5.5 to 6.5. The overall rate of hydrolysis was fastest at 40 degrees C and a pH of 6.0. Nonlinear regression methods were employed to determine the kinetic parameters of rate expressions based on a generic Ping-Pong Bi Bi mechanism. The best nonlinear fit of the data was consistent with a mechanism that assumes that acylation of the enzyme is the rate-limiting step in the hydrolysis reaction.
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Affiliation(s)
- C G Hill
- Department of Chemical Engineering, University of Wisconsin-Madison, 53706, USA.
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Baruque Filho E, Baruque M, Sant’Anna Jr. G. Determination of the enzyme reaction rate in a differential fixed-bed reactor: a case study. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2001. [DOI: 10.1590/s0104-66322001000100001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Matsumoto M, Kondo K. Enhanced thermostability of α-chymotrypsin enclosed in inorganic microcapsules. J Biosci Bioeng 2001. [DOI: 10.1016/s1389-1723(01)80226-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Butterfield D, Bhattacharyya D, Daunert S, Bachas L. Catalytic biofunctional membranes containing site-specifically immobilized enzyme arrays: a review. J Memb Sci 2001. [DOI: 10.1016/s0376-7388(00)00342-2] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Arica MY, ?enel S, Alaeddino?lu NG, Patir S, Denizli A. Invertase immobilized on spacer-arm attached poly(hydroxyethyl methacrylate) membrane: Preparation and properties. J Appl Polym Sci 2000. [DOI: 10.1002/(sici)1097-4628(20000401)75:14<1685::aid-app1>3.0.co;2-6] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Yakup Ar?ca M. Immobilization of polyphenol oxidase on carboxymethylcellulose hydrogel beads: preparation and characterization. POLYM INT 2000. [DOI: 10.1002/1097-0126(200007)49:7<775::aid-pi454>3.0.co;2-o] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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The concept of the unfolding region for approaching the mechanisms of enzyme stabilization. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s1381-1177(99)00026-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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De Queiroz AAA, Vargas RR, Higa OZ, Barrak ÉR, Bechara EJ, Wlasdislaw B, Marzorati L. Graft copolymers with immobilized peroxidase for organic synthesis. Radiat Phys Chem Oxf Engl 1993 1999. [DOI: 10.1016/s0969-806x(98)00330-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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40
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Ding Z, Chen G, Hoffman AS. Unusual properties of thermally sensitive oligomer-enzyme conjugates of poly(N-isopropylacrylamide)-trypsin. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1998; 39:498-505. [PMID: 9468062 DOI: 10.1002/(sici)1097-4636(19980305)39:3<498::aid-jbm22>3.0.co;2-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Reversible soluble-insoluble oligomer-enzyme conjugates have been prepared by conjugating a thermally sensitive oligomer, poly(N-isopropylacrylamide) [poly(NIPAAm)] to trypsin. The conjugates can catalyze enzymatic reactions in solution and then may be separated from the solution by thermal precipitation. One special feature of the conjugates is that every poly(NIPAAm) chain has only one end attachment to the enzyme, so that the loss of enzymatic activity due to steric hindrance should be minimized. Conjugates with various numbers of oligomer chains per trypsin molecule were prepared. Surprisingly, the conjugates increased in enzymatic activity with increasing oligomer conjugation to the native trypsin. The trypsin active sites in the conjugates were accessible to large molecules, such as soybean trypsin inhibitor (MW = 21,500). The enzyme conjugates were more stable than native trypsin, both in solution and in the precipitated phase. On the other hand, the conjugates lost enzymatic activity faster than native trypsin when the temperature was repeatedly cycled through the lower critical solution temperature (LCST) of the poly(NIPAAm). The recovery of the conjugates by thermal precipitation in each cycle was over 95% even after 14 cycles through the LCST.
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Affiliation(s)
- Z Ding
- Center for Bioengineering, University of Washington, Seattle 98195, USA
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41
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Aksoy S, Tumturk H, Hasirci N. Stability of alpha-amylase immobilized on poly(methyl methacrylate-acrylic acid) microspheres. J Biotechnol 1998; 60:37-46. [PMID: 9571800 DOI: 10.1016/s0168-1656(97)00179-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Poly(methyl methacrylate-acrylic acid) microspheres were prepared and the acid groups were activated by using either carbodiimide (CDI) or thionyl chloride (SOCl2). alpha-Amylase was covalently bound on these activated microspheres. The properties of the immobilized enzyme were investigated and compared with those of the free enzyme. The relative activities were found to be 80.4 and 67.5% for carbodiimide and thionyl chloride bound enzymes, respectively. Maximum activities were obtained at lower pHs and higher temperatures upon immobilization compared to free enzyme. No change in Vmax and approximately 12-fold increase in K(m) were observed for immobilized enzymes. The enzyme activities, after storage for 1 month, were found to be 24.5 and 52.5% of the initial activity values for CDI and SOCl2 activated matrices, respectively. On the other hand the free enzyme lost its activity completely in 20 days. Immobilization, storage stability and repeated use capability experiments carried out in the presence of Ca2+ ions demonstrated higher stability, such as SOCl2 immobilized enzyme retained 83.7% and CDI immobilized enzyme retained 90.3% of the original activity of the enzyme. The immobilized enzymes that were used 20 times in 3 days in repeated batch experiments demonstrated that, in the absence of Ca2+ ions about 75% and in the presence of Ca2+ ions greater than 90% of the original enzyme activity was retained.
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Affiliation(s)
- S Aksoy
- Department of Chemistry, Gazi University, Ankara, Turkey
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42
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Arica M, Alaeddinoğlu N, Hasirci V. Immobilization of glucoamylase onto activated pHEMA/EGDMA microspheres: properties and application to a packed-bed reactor. Enzyme Microb Technol 1998. [DOI: 10.1016/s0141-0229(97)00139-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Analysis of mechanism and kinetics of thermal inactivation of enzymes: Evaluation of multitemperature data applied to inactivation of yeast invertase. Enzyme Microb Technol 1997. [DOI: 10.1016/s0141-0229(96)00150-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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44
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Preparations and properties of temperature-sensitive poly(N-isopropylacrylamide) -chymotrypsin conjugates. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s1381-1177(96)00032-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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Polakovic̆ M, Vrábel P. Analysis of the mechanism and kinetics of thermal inactivation of enzymes: Critical assessment of isothermal inactivation experiments. Process Biochem 1996. [DOI: 10.1016/s0032-9592(96)00026-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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47
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Arnold U, Rücknagel KP, Schierhorn A, Ulbrich-Hofmann R. Thermal unfolding and proteolytic susceptibility of ribonuclease A. EUROPEAN JOURNAL OF BIOCHEMISTRY 1996; 237:862-9. [PMID: 8647135 DOI: 10.1111/j.1432-1033.1996.0862p.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
With the aim to localize the structural region that becomes first accessible to proteolytic attack during thermal unfolding, the proteolysis of ribonuclease A was studied in the temperature range of 20-65 degrees C. Subtilisin, proteinase K, and elastase proved to be not appropriate as indicators of thermal unfolding, because even the native protein molecule was cleaved by these proteases. In contrast, chymotrypsin, trypsin, and thermolysin attacked ribonuclease A only after its thermal treatment. For thermolysin and trypsin, the first primary cleavage sites of ribonuclease A could be identified by blotting of the electrophoretic bands, partial N-terminal sequencing of the fragments and assignment according to their molecular masses. The results were confirmed by the separation of the proteolytic fragments by HPLC and subsequent matrix-assisted laser desorption ionization mass spectrometry. The first cleavage sites were determined to be Lys31-Ser32 and Arg33-Asn34 for trypsin and Asn34-Leu35 and Thr45-Phe46 for thermolysin. Hence the structural region from Lys31 to Leu35, together with the adjacent beta-structure containing Thr45-Phe46, is suggested to represent a labile region of the ribonuclease A molecule, which becomes exposed at thermal denaturation.
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Affiliation(s)
- U Arnold
- Martin-Luther University Halle-Wittenberg, Department of Biochemistry/ Biotechnology, Federal Republic of Germany
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48
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Rejikumar S, Devi S. Preparation and Characterization of Pepsin Immobilized on Polymeric Supports. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1995. [DOI: 10.1080/10601329508011043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Immobilization of a pectinlyase from Aspergillus niger for application in food technology. Enzyme Microb Technol 1995. [DOI: 10.1016/0141-0229(94)01134-i] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Lee SJ, Yoo SH, Kim MJ, Kim JW, Seok HM, Park KH. Production and Characterization of Branched Oligosaccharides from Liquefied Starch by the Action of B. Licheniformis Amylase. STARCH-STARKE 1995. [DOI: 10.1002/star.19950470403] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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