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Beyazit F, Arica MY, Acikgoz-Erkaya I, Ozalp C, Bayramoglu G. Quartz crystal microbalance-based aptasensor integrated with magnetic pre-concentration system for detection of Listeria monocytogenes in food samples. Mikrochim Acta 2024; 191:235. [PMID: 38570380 PMCID: PMC10990998 DOI: 10.1007/s00604-024-06307-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/09/2024] [Indexed: 04/05/2024]
Abstract
A fast and accurate identification of Listeria monocytogenes. A new quartz crystal microbalance (QCM) aptasensor was designed for the specific and rapid detection of L. monocytogenes. Before detection of the target bacterium from samples in the QCM aptasensor, a magnetic pre-enrichment system was used to eliminate any contaminant in the samples. The prepared magnetic system was characterized using ATR-FTIR, SEM, VSM, BET, and analytical methods. The saturation magnetization values of the Fe3O4, Fe3O4@PDA, and Fe3O4@PDA@DAPEG particles were 57.2, 40.8, and 36.4 emu/g, respectively. The same aptamer was also immobilized on the QCM crystal integrated into QCM flow cell and utilized to quantitatively detect L. monocytogenes cells from the samples. It was found that a specific aptamer-magnetic pre-concentration system efficiently captured L. monocytogenes cells in a short time (approximately 10 min). The Fe3O4@PDA@DA-PEG-Apt particles provided selective isolation of L. monocytogenes from the bacteria-spiked media up to 91.8%. The immobilized aptamer content of the magnetic particles was 5834 µg/g using 500 ng Apt/mL. The QCM aptasensor showed a very high range of analytical performance to the target bacterium from 1.0 × 102 and 1.0 × 107 CFU/mL. The limit of detection (LOD) and limit of quantitation (LOQ) were 148 and 448 CFU/mL, respectively, from the feeding of the QCM aptasensor flow cell with the eluent of the magnetic pre-concentration system. The reproducibility of the aptasensor was more than 95%. The aptasensor was very specific to L. monocytogenes compared to the other Listeria species (i.e., L. ivanovii, L. innocua, and L. seeligeri) or other tested bacteria such as Staphylococcus aureus, Escherichia coli, and Bacillus subtilis. The QCM aptasensor was regenerated with NaOH solution, and the system was reused many times.
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Affiliation(s)
- Fatma Beyazit
- Department of Obstetrics and Gynecology, Faculty of Medicine, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Mehmet Yakup Arica
- Biochemical Processing and Biomaterial Research Laboratory, Gazi University, 06500, Teknikokullar, Ankara, Turkey
| | - Ilkay Acikgoz-Erkaya
- Department of Environmental Science, Faculty of Engineering and Architecture, Ahi Evran University, Kırsehir, Turkey
| | - Cengiz Ozalp
- Department of Medical Biology, School of Medicine, Atilim University, Ankara, Turkey
| | - Gulay Bayramoglu
- Biochemical Processing and Biomaterial Research Laboratory, Gazi University, 06500, Teknikokullar, Ankara, Turkey.
- Department of Chemistry, Faculty of Sciences, Gazi University, 06500, Teknikokullar, Ankara, Turkey.
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Monajati M, Tamaddon AM, Abolmaali SS, Yousefi G, Borandeh S, Dinarvand R. Enhanced L-asparaginase stability through immobilization in supramolecular nanogels of PEG-grafted poly HPMA with bis(α-cyclodextrin). Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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3
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Immobilization of a Bienzymatic System via Crosslinking to a Metal‐Organic Framework. Catalysts 2022. [DOI: 10.3390/catal12090969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A leading biotechnological advancement in the field of biocatalysis is the immobilization of enzymes on solid supports to create more stable and recyclable systems. Metal-organic frameworks (MOFs) are porous materials that have been explored as solid supports for enzyme immobilization. Composed of organic linkers and inorganic nodes, MOFs feature empty void space with large surface areas and have the ability to be modified post-synthesis. Our target enzyme system for immobilization is glucose oxidase (GOx) and chloroperoxidase (CPO). Glucose oxidase catalyzes the oxidation of glucose and is used for many applications in biosensing, biofuel cells, and food production. Chloroperoxidase is a fungal heme enzyme that catalyzes peroxide-dependent halogenation, oxidation, and hydroxylation. These two enzymes work sequentially in this enzyme system by GOx producing peroxide, which activates CPO that reacts with a suitable substrate. This study focuses on using a zirconium-based MOF, UiO-66-NH2, to immobilize the enzyme system via crosslinking with the MOF’s amine group on the surface of the MOF. This study investigates two different crosslinkers: disuccinimidyl glutarate (DSG) and 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC)/N-hydroxysuccinidimide (NHS), providing stable crosslinking of the MOF to the enzymes. The two crosslinkers are used to covalently bond CPO and GOx onto UiO-66-NH2, and a comparison of the recyclability and enzymatic activity of the single immobilization of CPO and the doubly immobilized CPO and GOx is discussed through assays and characterization analyses. The DSG-crosslinked composites displayed enhanced activity relative to the free enzyme, and all crosslinked enzyme/MOF composites demonstrated recyclability, with at least 30% of the activity being retained after four catalytic cycles. The results of this report will aid researchers in utilizing CPO as a biocatalyst that is more active and has greater recyclability.
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Sharma A, Vázquez LAB, Hernández EOM, Becerril MYM, Oza G, Ahmed SSSJ, Ramalingam S, Iqbal HMN. Green remediation potential of immobilized oxidoreductases to treat halo-organic pollutants persist in wastewater and soil matrices - A way forward. CHEMOSPHERE 2022; 290:133305. [PMID: 34929272 DOI: 10.1016/j.chemosphere.2021.133305] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/11/2021] [Accepted: 12/12/2021] [Indexed: 02/08/2023]
Abstract
The alarming presence of hazardous halo-organic pollutants in wastewater and soils generated by industrial growth, pharmaceutical and agricultural activities is a major environmental concern that has drawn the attention of scientists. Unfortunately, the application of conventional technologies within hazardous materials remediation processes has radically failed due to their high cost and ineffectiveness. Consequently, the design of innovative and sustainable techniques to remove halo-organic contaminants from wastewater and soils is crucial. Altogether, these aspects have led to the search for safe and efficient alternatives for the treatment of contaminated matrices. In fact, over the last decades, the efficacy of immobilized oxidoreductases has been explored to achieve the removal of halo-organic pollutants from diverse tainted media. Several reports have indicated that these enzymatic constructs possess unique properties, such as high removal rates, improved stability, and excellent reusability, making them promising candidates for green remediation processes. Hence, in this current review, we present an insight of green remediation approaches based on the use of immobilized constructs of phenoloxidases (e.g., laccase and tyrosinase) and peroxidases (e.g., horseradish peroxidase, chloroperoxidase, and manganese peroxidase) for sustainable decontamination of wastewater and soil matrices from halo-organic pollutants, including 2,4-dichlorophenol, 4-chlorophenol, diclofenac, 2-chlorophenol, 2,4,6-trichlorophenol, among others.
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Affiliation(s)
- Ashutosh Sharma
- Tecnologico de Monterrey, School of Engineering and Sciences, Centre of Bioengineering, Campus Queretaro, 76130, Mexico.
| | - Luis Alberto Bravo Vázquez
- Tecnologico de Monterrey, School of Engineering and Sciences, Centre of Bioengineering, Campus Queretaro, 76130, Mexico
| | | | | | - Goldie Oza
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Parque Tecnológico Querétaro S/n, Sanfandila. Pedro Escobedo, Querétaro, 76703, Mexico
| | - Shiek S S J Ahmed
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, India
| | - Sathishkumar Ramalingam
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641046, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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Hobisch M, Holtmann D, Gomez de Santos P, Alcalde M, Hollmann F, Kara S. Recent developments in the use of peroxygenases - Exploring their high potential in selective oxyfunctionalisations. Biotechnol Adv 2021; 51:107615. [PMID: 32827669 PMCID: PMC8444091 DOI: 10.1016/j.biotechadv.2020.107615] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 08/10/2020] [Accepted: 08/14/2020] [Indexed: 12/11/2022]
Abstract
Peroxygenases are an emerging new class of enzymes allowing selective oxyfunctionalisation reactions in a cofactor-independent way different from well-known P450 monooxygenases. Herein, we focused on recent developments from organic synthesis, molecular biotechnology and reaction engineering viewpoints that are devoted to bring these enzymes in industrial applications. This covers natural diversity from different sources, protein engineering strategies for expression, substrate scope, activity and selectivity, stabilisation of enzymes via immobilisation, and the use of peroxygenases in low water media. We believe that peroxygenases have much to offer for selective oxyfunctionalisations and we have much to study to explore the full potential of these versatile biocatalysts in organic synthesis.
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Affiliation(s)
- Markus Hobisch
- Department of Engineering, Biocatalysis and Bioprocessing Group, Aarhus University, Gustav Wieds Vej 10, Aarhus C 8000, Denmark
| | - Dirk Holtmann
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Wiesenstr. 14, Gießen 35390, Germany
| | | | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, C/Marie Curie 2, Madrid 28049, Spain; EvoEnzyme S.L, C/ Marie Curie 2, Madrid 28049, Spain
| | - Frank Hollmann
- Department of Biotechnology, Biocatalysis Group, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
| | - Selin Kara
- Department of Engineering, Biocatalysis and Bioprocessing Group, Aarhus University, Gustav Wieds Vej 10, Aarhus C 8000, Denmark.
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Sharma A, Thatai KS, Kuthiala T, Singh G, Arya SK. Employment of polysaccharides in enzyme immobilization. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.105005] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Mao S, Zhang Z, Ma X, Tian H, Lu F, Liu Y. Efficient secretion expression of phospholipase D in Bacillus subtilis and its application in synthesis of phosphatidylserine by enzyme immobilization. Int J Biol Macromol 2020; 169:282-289. [PMID: 33333097 DOI: 10.1016/j.ijbiomac.2020.12.103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/05/2020] [Accepted: 12/13/2020] [Indexed: 11/29/2022]
Abstract
Transphosphatidylation catalyzed by phospholipase D has gained increasing attention for producing phosphatidylserine (PS), which can be used in functional food and medicine. In this study, we investigated the effects of six signal peptides on the secretion of PLD (PLDsa) from Streptomyces antibioticus TCCC 21059 in the food-grade GRAS bacterium Bacillus subtilis. It indicated that the optimal signal peptide DacB with an Ala-X-Ala sequence motif at the C-terminus showed the highest secretory expression ability, resulting in increased production of 2.84 U/mL PLDsa. Then PLDsa was immobilized on the epoxy-based carriers, and one of these carriers allowed PLDsa loading of up to 2.7 mg/g. The immobilized PLDsa was more stable over a wide range of pH value (4.5-7.5) and temperature (16 °C-60 °C) than free PLDsa. Subsequently, the synthesis of PS from soybean phosphatidylcholine (PC) was carried out in purely aqueous solution using immobilized PLDsa, leading to a high yield of 65%. The immobilized PLDsa catalyst maintained a relative PS production of 60% after 5 recycles. Notably, the use of toxic solvent was completely eliminated in the whole process, which would be more profitable for the application of PS.
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Affiliation(s)
- Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Zhaohui Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Xiaoyu Ma
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Huan Tian
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China.
| | - Yihan Liu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, State Key Laboratory of Food Nutrition and Safety, The College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, PR China.
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8
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Nunes JCF, Cristóvão RO, Freire MG, Santos-Ebinuma VC, Faria JL, Silva CG, Tavares APM. Recent Strategies and Applications for l-Asparaginase Confinement. Molecules 2020; 25:E5827. [PMID: 33321857 PMCID: PMC7764279 DOI: 10.3390/molecules25245827] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/03/2020] [Accepted: 12/06/2020] [Indexed: 12/22/2022] Open
Abstract
l-asparaginase (ASNase, EC 3.5.1.1) is an aminohydrolase enzyme with important uses in the therapeutic/pharmaceutical and food industries. Its main applications are as an anticancer drug, mostly for acute lymphoblastic leukaemia (ALL) treatment, and in acrylamide reduction when starch-rich foods are cooked at temperatures above 100 °C. Its use as a biosensor for asparagine in both industries has also been reported. However, there are certain challenges associated with ASNase applications. Depending on the ASNase source, the major challenges of its pharmaceutical application are the hypersensitivity reactions that it causes in ALL patients and its short half-life and fast plasma clearance in the blood system by native proteases. In addition, ASNase is generally unstable and it is a thermolabile enzyme, which also hinders its application in the food sector. These drawbacks have been overcome by the ASNase confinement in different (nano)materials through distinct techniques, such as physical adsorption, covalent attachment and entrapment. Overall, this review describes the most recent strategies reported for ASNase confinement in numerous (nano)materials, highlighting its improved properties, especially specificity, half-life enhancement and thermal and operational stability improvement, allowing its reuse, increased proteolysis resistance and immunogenicity elimination. The most recent applications of confined ASNase in nanomaterials are reviewed for the first time, simultaneously providing prospects in the described fields of application.
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Affiliation(s)
- João C. F. Nunes
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua do Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.C.F.N.); (R.O.C.); (J.L.F.)
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Raquel O. Cristóvão
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua do Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.C.F.N.); (R.O.C.); (J.L.F.)
| | - Mara G. Freire
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Valéria C. Santos-Ebinuma
- School of Pharmaceutical Sciences, Universidade Estadual Paulista-UNESP, Araraquara 14800-903, Brazil;
| | - Joaquim L. Faria
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua do Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.C.F.N.); (R.O.C.); (J.L.F.)
| | - Cláudia G. Silva
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua do Dr. Roberto Frias, 4200-465 Porto, Portugal; (J.C.F.N.); (R.O.C.); (J.L.F.)
| | - Ana P. M. Tavares
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;
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Zdarta J, Staszak M, Jankowska K, Kaźmierczak K, Degórska O, Nguyen LN, Kijeńska-Gawrońska E, Pinelo M, Jesionowski T. The response surface methodology for optimization of tyrosinase immobilization onto electrospun polycaprolactone–chitosan fibers for use in bisphenol A removal. Int J Biol Macromol 2020; 165:2049-2059. [DOI: 10.1016/j.ijbiomac.2020.10.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 09/03/2020] [Accepted: 10/12/2020] [Indexed: 01/15/2023]
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10
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Yang Q, Li L, Wang B, Zhu L, Tan J. Modifying the Microenvironment of Epoxy Resin to Improve the Activity of Immobilized 7α-Hydroxysteroid Dehydrogenases. Appl Biochem Biotechnol 2020; 193:925-939. [PMID: 33225381 DOI: 10.1007/s12010-020-03473-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 11/09/2020] [Indexed: 01/07/2023]
Abstract
7α-Hydroxysteroid dehydrogenase (7α-HSDH) is one of the key enzymes in the catalytic reaction of taurochenodeoxycholic acid (TCDCA). To improve the activity of immobilized 7α-HSDH, the microenvironment of immobilized 7α-HSDH was modified with epoxy resin and ethanediamine (EDA). The amino-epoxy support was characterized by Fourier transform infrared (FTIR), Spectrometer elemental analysis (EA), scanning electron microscopy (SEM), contact angle (CA), and Zetasizer. The effects of the immobilization of 7α-HSDH on the amino-epoxy resin and epoxy resin were studied. The results indicated that the relative activity of immobilized 7α-HSDH on the amino-epoxy resin increased by approximately 80%. Meanwhile, the immobilized 7α-HSDH showed favorable thermal stability and operational stability. The thermal stability of immobilized 7α-HSDH increased at temperatures ranging from 15 to 35 °C, while the relative activities of 7α-HSDH immobilized on the amino-epoxy resin and epoxy resin retained 56.4% and 61.0%. After 6 cycles, the residual activities of the 7α-HSDH immobilized on the amino-epoxy resin and epoxy resin were 81.4% and 89.5%, respectively.
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Affiliation(s)
- Qiong Yang
- Chongqing Key Laboratory of Inorganic Special Functional Materials, Yangtze Normal University, Chongqing, 408100, People's Republic of China. .,Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, No. 174, Shapingba Main Street, Chongqing, 400030, People's Republic of China.
| | - Liuying Li
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, No. 174, Shapingba Main Street, Chongqing, 400030, People's Republic of China
| | - Bochu Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, No. 174, Shapingba Main Street, Chongqing, 400030, People's Republic of China.
| | - Liancai Zhu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, No. 174, Shapingba Main Street, Chongqing, 400030, People's Republic of China
| | - Jun Tan
- Chongqing Key Laboratory of Medicinal Resources in the Three Gorges Reservoir Region, School of Biological & Chemical engineering, Chongqing University of Education, Chongqing, 400067, China
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Kharazmi S, Taheri-Kafrani A, Soozanipour A. Efficient immobilization of pectinase on trichlorotriazine-functionalized polyethylene glycol-grafted magnetic nanoparticles: A stable and robust nanobiocatalyst for fruit juice clarification. Food Chem 2020; 325:126890. [PMID: 32387928 DOI: 10.1016/j.foodchem.2020.126890] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/28/2020] [Accepted: 04/20/2020] [Indexed: 11/23/2022]
Abstract
Developing an effective strategy to economically exploitation of pectinase, as one of the most widely used enzymes in food industry, is of utmost importance. Herein, pectinase was covalently immobilized onto polyethylene glycol grafted magnetic nanoparticles via trichlorotriazine with high loading efficiency. The generated immobilized pectinase showed enhanced catalytic activity, improved operational stability, and easily reusability. Thermal and pH stabilities studies showed improved performance of immobilized pectinase especially at extreme points. Compared to free enzyme, the noticeably lower Km and higher vmax values of immobilized pectinase demonstrated the enhanced catalytic activity of this enzyme after immobilization. Besides, the immobilized enzyme exhibited excellent reusability and stability by retaining up to 55 and 94% of its initial activity after 10 recycles and 125 days storage at 25 °C, respectively. Moreover, turbidity reduction occurred up to 59% in treated pineapple juice with immobilized pectinase, suggesting applicability of this system in juice and food-processing industries.
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Affiliation(s)
- Sara Kharazmi
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 81746-73441, Iran
| | - Asghar Taheri-Kafrani
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 81746-73441, Iran.
| | - Asieh Soozanipour
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 81746-73441, Iran
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12
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He J, Zhang Y, Yuan Q, Liang H. Catalytic Activity and Application of Immobilized Chloroperoxidase by Biometric Magnetic Nanoparticles. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b03910] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie He
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, People’s Republic of China
| | - Yumei Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, People’s Republic of China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, People’s Republic of China
| | - Hao Liang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, People’s Republic of China
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13
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Hassabo AA, Mousa AM, Abdel-Gawad H, Selim MH, Abdelhameed RM. Immobilization ofl-methioninase on a zirconium-based metal–organic framework as an anticancer agent. J Mater Chem B 2019. [DOI: 10.1039/c9tb00198k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new composite (METase@UiO-66) was prepared froml-methioninase and UiO-66-(COOH), which exhibited enhanced thermostability, pH and storage lifetime compared tol-methioninase. Moreover,in vivoexperiments showed that the drug inhibited tumor growth in mice.
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Affiliation(s)
- Amany A. Hassabo
- Microbial Chemistry Department
- National Research Centre
- Cairo
- Egypt
| | - Amria M. Mousa
- Biochemistry Department
- National Research Centre
- Cairo
- Egypt
| | - Hassan Abdel-Gawad
- Applied Organic Chemistry Department
- Chemical Industries Research Division
- National Research Centre
- Dokki
- Egypt
| | - Mohsen H. Selim
- Microbial Chemistry Department
- National Research Centre
- Cairo
- Egypt
| | - Reda M. Abdelhameed
- Applied Organic Chemistry Department
- Chemical Industries Research Division
- National Research Centre
- Dokki
- Egypt
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Ali M, Husain Q, Alam N, Ahmad M. Nano-peroxidase fabrication on cation exchanger nanocomposite: Augmenting catalytic efficiency and stability for the decolorization and detoxification of Methyl Violet 6B dye. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Improved Biodegradation of Synthetic Azo Dye by Anionic Cross-Linking of Chloroperoxidase on ZnO/SiO 2 Nanocomposite Support. Appl Biochem Biotechnol 2017; 184:1009-1023. [PMID: 28933034 DOI: 10.1007/s12010-017-2607-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 09/13/2017] [Indexed: 10/18/2022]
Abstract
A novel ZnO nanowire/macroporous SiO2 composite was used as a support to immobilize chloroperoxidase (CPO) by in situ cross-linking method. An anionic bi-epoxy compound was synthesized and used as a long-chained anionic cross-linker, and it was adsorbed on the surface of ZnO nanowires through static interaction before reaction with CPO, creating a new approach to change the structure, property, and catalytic performance of the produced cross-linking enzyme aggregates (CLEAs) of CPO. The immobilized CPO showed high activity in the decolorization of three azo dyes. The effect of various conditions such as the loading amount of CPO, solution pH, temperature, and dye concentration was optimized on the decolorization. Under optimized conditions, the decolorization percentage of Acid Blue 113, Direct Black 38, and Acid Black 10 BX reached as high as 95.4, 92.3, and 89.1%, respectively. The immobilized CPO exhibited much better thermostability and resistance to pH inactivation than free CPO. The storage stability and reusability were greatly improved through the immobilization. It was found from the decolorization of Acid Blue 113 that 83.6% of initial activity retained after incubation at 4 °C for 60 days and that 80.9% of decolorization efficiency retained after 12 cycles of reuses.
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Agarwal P, Dubey S, Singh M, Singh RP. Aspergillus niger PA2 Tyrosinase Covalently Immobilized on a Novel Eco-Friendly Bio-Composite of Chitosan-Gelatin and Its Evaluation for L-DOPA Production. Front Microbiol 2017; 7:2088. [PMID: 28066399 PMCID: PMC5177867 DOI: 10.3389/fmicb.2016.02088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 12/09/2016] [Indexed: 11/30/2022] Open
Abstract
Tyrosinase (EC 1.14.18.1) a copper-containing monooxygenase, isolated from a fungal isolate Aspergillus niger PA2 was subjected for immobilization onto a composite consisting of chitosan and gelatin biopolymers. The homogeneity of the chitosan-gelatin biocomposite film was characterized by X-ray diffraction analyses. To evaluate immobilization efficiency, chitosan-gelatin-Tyr bio-composite films were analyzed by field emission scanning electron microscopy, atomic force microscopy and UV-spectroscopy. The rough morphology of the film led to a high loading of enzyme and it could retain its bioactivity for a longer period. The enzyme adsorbed onto the film exhibited 72% of its activity after 10 days and exhibited good repeatability for up to nine times, after intermittent storage. Moreover, the immobilized enzyme exhibited broader pH and temperature profile as compared to free counterpart. Immobilized enzyme was further evaluated for the synthesis of L-DOPA (2,4-dihydroxy phenylalanine) which is a precursor of dopamine and a potent drug for the treatment of Parkinson's disease and for myocardium neurogenic injury.
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Affiliation(s)
- Pragati Agarwal
- Department of Biotechnology, Indian Institute of Technology Roorkee Roorkee, India
| | - Swati Dubey
- Department of Biotechnology, Indian Institute of Technology Roorkee Roorkee, India
| | - Mukta Singh
- Department of Biotechnology, Indian Institute of Technology Roorkee Roorkee, India
| | - Rajesh P Singh
- Department of Biotechnology, Indian Institute of Technology Roorkee Roorkee, India
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17
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Liu Y, Zhang Y, Li X, Yuan Q, Liang H. Self-repairing metal–organic hybrid complexes for reinforcing immobilized chloroperoxidase reusability. Chem Commun (Camb) 2017; 53:3216-3219. [DOI: 10.1039/c6cc10319g] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A self-repairing metal–chloroperoxidase (CPO) hybrid nanocatalyst with a sodium alginate (SA) coating displayed robust reusability under acidic conditions.
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Affiliation(s)
- Yan Liu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Yumei Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Xuejian Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
| | - Hao Liang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
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18
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Wu Q, Xu Z, Duan Y, Zhu Y, Ou M, Xu X. Immobilization of tyrosinase on polyacrylonitrile beads: biodegradation of phenol from aqueous solution and the relevant cytotoxicity assessment. RSC Adv 2017. [DOI: 10.1039/c7ra03174b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An economical and stabilized immobilized-enzyme method was developed for the removal of phenol in wastewater.
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Affiliation(s)
- Qiao Wu
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
| | - Zhiqun Xu
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
| | - Yunjian Duan
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
| | - Yincan Zhu
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
| | - Minrui Ou
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
| | - Xiaoping Xu
- College of Chemistry and Chemical Engineering
- Fuzhou University
- Fuzhou 350108
- China
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19
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Yang Q, Wang B, Zhang Z, Lou D, Tan J, Zhu L. The effects of macromolecular crowding and surface charge on the properties of an immobilized enzyme: activity, thermal stability, catalytic efficiency and reusability. RSC Adv 2017. [DOI: 10.1039/c7ra06544b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The microenvironment around an immobilized enzyme molecule significantly influences the properties of the immobilized enzyme.
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Affiliation(s)
- Qiong Yang
- Key Laboratory of Biorheological Science and Technology (Chongqing University)
- Ministry of Education
- College of Bioengineering
- Chongqing University
- Chongqing 400030
| | - Bochu Wang
- Key Laboratory of Biorheological Science and Technology (Chongqing University)
- Ministry of Education
- College of Bioengineering
- Chongqing University
- Chongqing 400030
| | - Zhi Zhang
- Key Laboratory of Biorheological Science and Technology (Chongqing University)
- Ministry of Education
- College of Bioengineering
- Chongqing University
- Chongqing 400030
| | - Deshuai Lou
- Chongqing Key Laboratory of Medicinal Resources in the Three Gorges Reservoir Region
- School of Biological & Chemical Engineering
- Chongqing University of Education
- Chongqing 400067
- PR China
| | - Jun Tan
- Chongqing Key Laboratory of Medicinal Resources in the Three Gorges Reservoir Region
- School of Biological & Chemical Engineering
- Chongqing University of Education
- Chongqing 400067
- PR China
| | - Liancai Zhu
- Key Laboratory of Biorheological Science and Technology (Chongqing University)
- Ministry of Education
- College of Bioengineering
- Chongqing University
- Chongqing 400030
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20
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Mahesh M, Arivizhivendhan K, Maharaja P, Boopathy R, Hamsavathani V, Sekaran G. Production, purification and immobilization of pectinase from Aspergillus ibericus onto functionalized nanoporous activated carbon (FNAC) and its application on treatment of pectin containing wastewater. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.07.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Immobilized lipase on micro-porous biosilica for enzymatic transesterification of algal oil. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2014.12.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Bormann S, Gomez Baraibar A, Ni Y, Holtmann D, Hollmann F. Specific oxyfunctionalisations catalysed by peroxygenases: opportunities, challenges and solutions. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01477d] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Peroxygenases are promising oxyfunctionalisation catalysts for organic synthesis.
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Affiliation(s)
| | - Alvaro Gomez Baraibar
- Delft University of Technology
- Department of Biotechnology
- 2628 BL Delft
- The Netherlands
| | - Yan Ni
- Delft University of Technology
- Department of Biotechnology
- 2628 BL Delft
- The Netherlands
| | - Dirk Holtmann
- DECHEMA Research Institute
- 60486 Frankfurt am Main
- Germany
| | - Frank Hollmann
- Delft University of Technology
- Department of Biotechnology
- 2628 BL Delft
- The Netherlands
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23
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Khade SM, Behera B, Sagiri SS, Singh VK, Thirugnanam A, Pal K, Ray SS, Pradhan DK, Bhattacharya MK. Gelatin–PEG based metronidazole-loaded vaginal delivery systems: preparation, characterization and in vitro antimicrobial efficiency. IRANIAN POLYMER JOURNAL 2014. [DOI: 10.1007/s13726-013-0213-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Gao Y, Truong YB, Cacioli P, Butler P, Kyratzis IL. Bioremediation of pesticide contaminated water using an organophosphate degrading enzyme immobilized on nonwoven polyester textiles. Enzyme Microb Technol 2014; 54:38-44. [DOI: 10.1016/j.enzmictec.2013.10.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 10/02/2013] [Accepted: 10/04/2013] [Indexed: 10/26/2022]
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25
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De Matteis L, Germani R, Mancini MV, Savelli G, Spreti N, Brinchi L, Pastori G. Investigations to optimize the catalytic performance of CPO encapsulated in PEG 200-doped silica matrices. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2013.07.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Cui C, Tao Y, Li L, Chen B, Tan T. Improving the activity and stability of Yarrowia lipolytica lipase Lip2 by immobilization on polyethyleneimine-coated polyurethane foam. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2013.03.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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27
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Enhanced stability of catalase covalently immobilized on functionalized titania submicrospheres. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1438-45. [DOI: 10.1016/j.msec.2012.12.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 11/06/2012] [Accepted: 12/13/2012] [Indexed: 11/20/2022]
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28
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Grover N, Dinu CZ, Kane RS, Dordick JS. Enzyme-based formulations for decontamination: current state and perspectives. Appl Microbiol Biotechnol 2013; 97:3293-300. [DOI: 10.1007/s00253-013-4797-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 02/15/2013] [Accepted: 02/18/2013] [Indexed: 11/28/2022]
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29
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Bayramoglu G, Akbulut A, Arica MY. Immobilization of tyrosinase on modified diatom biosilica: enzymatic removal of phenolic compounds from aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2013; 244-245:528-536. [PMID: 23245881 DOI: 10.1016/j.jhazmat.2012.10.041] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 10/19/2012] [Accepted: 10/19/2012] [Indexed: 06/01/2023]
Abstract
Acid and plasma treated diatom-biosilica particles, were modified with 3-aminopropyl triethoxysilane (APTES), and activated with glutaraldehyde. Then, tyrosinase was immobilized onto the pre-activated biosilica by covalent bonding. The biosilica properties were determined using SEM, and FTIR. The enzyme system has been characterized as a function of pH, temperature and substrate concentration. Optimum pH of the free and immobilized enzyme was found to be pH 7.0. Optimum temperatures of the free and immobilized enzymes were determined as 35 and 45 °C respectively. The biodegradation of phenolic compounds (i.e., phenol, para-cresol and phenyl acetate) has been studied by means of immobilized tyrosinase in a batch system. The immobilized tyrosinase retained about 74% of its original activity after 10 times repeated use in the batch system. Moreover, the storage stability of the tyrosinase-biosilica system resulted excellent, since they maintained more than 67% of the initial activity after eighth week storage. Highly porous structure of biosilica can provide large surface area for immobilization of high quantity enzyme. The porous structure of the biosilica can decrease diffusion limitation both substrate phenols and their products. Finally, the immobilized tyrosinase was used in a batch system for degradation of three different phenols.
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Affiliation(s)
- Gulay Bayramoglu
- Biochemical Processing and Biomaterial Research Laboratory, Faculty of Science, Gazi University, 06500 Teknikokullar, Ankara, Turkey.
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30
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Yadav P, Yadav M, Yadav KDS, Sharma JK, Singh VK. Purification of chloroperoxidase from Musa paradisiaca
stem juice. INT J CHEM KINET 2012. [DOI: 10.1002/kin.20746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Liu K, Zhao G, He B, Chen L, Huang L. Immobilization of pectinase and lipase on macroporous resin coated with chitosan for treatment of whitewater from papermaking. BIORESOURCE TECHNOLOGY 2012; 123:616-619. [PMID: 22947447 DOI: 10.1016/j.biortech.2012.07.074] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 06/10/2012] [Accepted: 07/20/2012] [Indexed: 06/01/2023]
Abstract
Anionic residues and pitch deposits in whitewater negatively impact the operation of paper-forming equipment. In order to remove these substances, a macroporous resin based on a methyl acrylate matrix was synthesized and coated with chitosan of various molecular weights through glutaraldehyde cross-linking. Pectinase from Bacillus licheniformis and lipase from Thermomyces lanuginosus were immobilized on the resin coated with chitosan by a Schiff base reaction. The highest hydrolysis activities of the immobilized enzymes were achieved by using chitosan with 10×10(5)DaMW for coating and 0.0025% glutaraldehyde for cross-linking chitosan. The cationic demand and pitch deposits in whitewater were reduced by 58% and 74%, respectively, when treating whitewater with immobilized dual-enzymes for 15min at 55°C and pH 7.5. This method is useful for treatment of whitewater in the papermaking industry.
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Affiliation(s)
- Kai Liu
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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32
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Bayramoglu G, Altintas B, Yakup Arica M. Cross-linking of horseradish peroxidase adsorbed on polycationic films: utilization for direct dye degradation. Bioprocess Biosyst Eng 2012; 35:1355-65. [DOI: 10.1007/s00449-012-0724-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 03/09/2012] [Indexed: 10/28/2022]
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33
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Bayramoglu G, Senkal BF, Yilmaz M, Arica MY. Immobilization and stabilization of papain on poly(hydroxyethyl methacrylate-ethylenglycol dimethacrylate) beads grafted with epoxy functional polymer chains via surface-initiated-atom transfer radical polymerization (SI-ATRP). BIORESOURCE TECHNOLOGY 2011; 102:9833-9837. [PMID: 21908189 DOI: 10.1016/j.biortech.2011.08.042] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 08/09/2011] [Accepted: 08/10/2011] [Indexed: 05/31/2023]
Abstract
Poly(hydroxyethyl methacrylate-ethylen glycol dimethacrylate), p(HEMA-EGDMA), beads were prepared by suspension polymerization, and were decorated with fibrous poly(glycidyl methacrylate), p(GMA), via surface initiated-atom transfer radical polymerization (SI-ATRP). The functional epoxy groups of the beads were used for covalent immobilization of papain. The average amount of immobilized enzyme was 18.7 mg/g beads. The immobilized enzyme was characterized by temperature, pH, operational and storage stability experiments. The maximum velocity of the free and immobilized enzymes (V(max)) and Michaelis-Menten constant (K(m)) values were determined as 10.7 and 8.3 U/mg proteins and 274 and 465 μM, respectively. The immobilized papain was operated in a batch reactor, and it was very effective for hydrolysis of different proteins (i.e., casein and cytochrom c).
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Affiliation(s)
- Gulay Bayramoglu
- Gazi University, Faculty of Sciences, Biochemical Processing and Biomaterial Research Laboratory, 06500 Teknikokullar, Ankara, Turkey.
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34
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Long JJ, Fu YJ, Zu YG, Li J, Wang W, Gu CB, Luo M. Ultrasound-assisted extraction of flaxseed oil using immobilized enzymes. BIORESOURCE TECHNOLOGY 2011; 102:9991-9996. [PMID: 21890349 DOI: 10.1016/j.biortech.2011.07.104] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 07/25/2011] [Accepted: 07/25/2011] [Indexed: 05/31/2023]
Abstract
An aqueous enzymatic process assisted by ultrasound extraction (AEP-UE) was applied to the extraction of oil from flaxseed (Linum usitatissimum L.). The highest oil recovery of 68.1% was obtained when ground flaxseed was incubated with 130 U/g of cellulase, pectinase, and hemicellulase for 12h, at 45°C and pH 5.0. The IC(50) values of oil obtained by AEP-UE and organic solvent extraction (OSE), as measured by DPPH scavenging activity essay, were 2.27 mg/mL and 3.31 mg/mL. The AEP-UE-derived oil had a 1.5% higher content of unsaturated fatty acids than the OSE-derived oil. AEP-UE is therefore a promising environmentally friendly method for large-scale preparation of flaxseed oil.
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Affiliation(s)
- Jing-jing Long
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
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35
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Wang F, Gu Z, Cui Z, Liu L. Comparison of covalent immobilization of amylase on polystyrene pellets with pentaethylenehexamine and pentaethylene glycol spacers. BIORESOURCE TECHNOLOGY 2011; 102:9374-9379. [PMID: 21868216 DOI: 10.1016/j.biortech.2011.07.110] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 07/25/2011] [Accepted: 07/29/2011] [Indexed: 05/31/2023]
Abstract
α-Amylase from Aspergillus oryzae was covalently immobilized onto polystyrene pellets with pentaethylenehexamine (PS-PEHA-Ald) and pentaethylene glycol (PS-PG-Ald) carrying a terminal aldehyde group. Optimum immobilization occured at pH 8.0 and 25 °C, and at pH 7.0 and 35 °C for PS-PEHA-Ald and PS-PG-Ald, respectively. PS-PEHA-Ald immobilized enzyme retained approximately 75% of the initial activity over 45 days of storage, 70% of the initial activity after nine runs of recycling and displayed the better resistance to detrimental metal ions. PS-PG-Ald immobilized enzyme retained approximately 50% of the initial activity in 8h at 70 °C. The catalytic efficiencies of PS-PEHA-Ald immobilized and PS-PG-Ald immobilized amylase were 1.42 and 1.29 times higher than that of native enzyme. The activation energy of the reaction mediated by the amylase was reduced by 58.1% and 57.3% when PS-PEHA-Ald and PS-PG-Ald used as support respectively.
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Affiliation(s)
- Feng Wang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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36
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Bayramoglu G, Karagoz B, Yilmaz M, Bicak N, Arica MY. Immobilization of catalase via adsorption on poly(styrene-d-glycidylmethacrylate) grafted and tetraethyldiethylenetriamine ligand attached microbeads. BIORESOURCE TECHNOLOGY 2011; 102:3653-3661. [PMID: 21194926 DOI: 10.1016/j.biortech.2010.12.029] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 12/05/2010] [Accepted: 12/06/2010] [Indexed: 05/30/2023]
Abstract
Fibrous poly(styrene-d-glycidylmethacrylate) (P(S-GMA)) brushes were grafted on poly(styrene-divinylbenzene) (P(S-DVB)) beads using surface initiated-atom transfer radical polymerization (SI-ATRP). Tetraethyldiethylenetriamine (TEDETA) ligand was incorporated on P(GMA) block. The multi-modal ligand attached beads were used for reversible immobilization of catalase. The influences of pH, ionic strength and initial catalase concentration on the immobilization capacities of the P(S-DVB)-g-P(S-GMA)-TEDETA beads have been investigated. Catalase adsorption capacity of P(S-DVB-g-P(S-GMA)-TEDETA beads was found to be 40.8 ± 1.7 mg/g beads at pH 6.5 (with an initial catalase concentration 1.0mg/mL). The K(m) value for immobilized catalase on the P(S-DVB-g-P(S-GMA)-TEDETA beads (0.43 ± 0.02 mM) was found about 1.7-fold higher than that of free enzyme (0.25 ± 0.03 mM). Optimum operational temperature and pH was increased upon immobilization. The same support was repeatedly used five times for immobilization of catalase after regeneration without significant loss in adsorption capacity or enzyme activity.
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Affiliation(s)
- Gulay Bayramoglu
- Gazi University, Faculty of Arts and Sciences, Biochemical Processing and Biomaterial Research Laboratory, Teknik Okullar, 06500 Ankara, Turkey.
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