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Demirci S, Sahiner N. Thermo‐responsive macroporous p(
NIPAM
) cryogel affords enhanced thermal stability and activity for ɑ‐glucosidase enzyme by entrapping in situ. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sahin Demirci
- Department of Chemistry, Faculty of Sciences and Arts Canakkale Onsekiz Mart University Terzioglu Campus, 17100, Canakkale TURKEY
| | - Nurettin Sahiner
- Department of Chemistry, Faculty of Sciences and Arts Canakkale Onsekiz Mart University Terzioglu Campus, 17100, Canakkale TURKEY
- Nanoscience and Technology Research and Application Center Canakkale Onsekiz Mart University Terzioglu Campus, 17100, Canakkale TURKEY
- Department of Chemical and Biomolecular Engineering University of South Florida Tampa FL USA
- Department of Ophthalmology Morsani College of Medicine, University of South Florida, 12901 B. Downs Blvd., MDC 21 Tampa FL USA
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Nöth M, Hussmann L, Belthle T, El-Awaad I, Davari MD, Jakob F, Pich A, Schwaneberg U. MicroGelzymes: pH-Independent Immobilization of Cytochrome P450 BM3 in Microgels. Biomacromolecules 2020; 21:5128-5138. [PMID: 33206503 DOI: 10.1021/acs.biomac.0c01262] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Microgels are an emerging class of "ideal" enzyme carriers because of their chemical and process stability, biocompatibility, and high enzyme loading capability. In this work, we synthesized a new type of permanently positively charged poly(N-vinylcaprolactam) (PVCL) microgel with 1-vinyl-3-methylimidazolium (quaternization of nitrogen by methylation of N-vinylimidazole moieties) as a comonomer (PVCL/VimQ) through precipitation polymerization. The PVCL/VimQ microgels were characterized with respect to their size, charge, swelling degree, and temperature responsiveness in aqueous solutions. P450 monooxygenases are usually challenging to immobilize, and often, high activity losses occur after the immobilization (in the case of P450 BM3 from Bacillus megaterium up to 100% loss of activity). The electrostatic immobilization of P450 BM3 in permanently positively charged PVCL/VimQ microgels was achieved without the loss of catalytic activity at the pH optimum of P450 BM3 (pH 8; ∼9.4 nmol 7-hydroxy-3-carboxy coumarin ethyl ester/min for free and immobilized P450 BM3); the resulting P450-microgel systems were termed P450 MicroGelzymes (P450 μ-Gelzymes). In addition, P450 μ-Gelzymes offer the possibility of reversible ionic strength-triggered release and re-entrapment of the biocatalyst in processes (e.g., for catalyst reuse). Finally, a characterization of the potential of P450 μ-Gelzymes to provide resistance against cosolvents (acetonitrile, dimethyl sulfoxide, and 2-propanol) was performed to evaluate the biocatalytic application potential.
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Affiliation(s)
- Maximilian Nöth
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.,DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany
| | - Larissa Hussmann
- DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
| | - Thomke Belthle
- DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany
| | - Islam El-Awaad
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.,DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany.,Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, 71526 Assiut, Egypt
| | - Mehdi D Davari
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
| | - Felix Jakob
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.,DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany
| | - Andrij Pich
- DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074 Aachen, Germany.,Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, The Netherlands
| | - Ulrich Schwaneberg
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany.,DWI-Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraβe 50, 52074 Aachen, Germany
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3
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Li L, Wang R, Xing X, Qu W, Chen S, Zhang Y. Preparation of porous semi-IPN temperature-sensitive hydrogel-supported nZVI and its application in the reduction of nitrophenol. J Environ Sci (China) 2019; 82:93-102. [PMID: 31133273 DOI: 10.1016/j.jes.2019.02.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/24/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Nanoscale zero-valent iron (nZVI) particles supported on a porous, semi-interpenetrating (semi-IPN), temperature-sensitive composite hydrogel (PNIPAm-PHEMA). nZVI@PNIPAm-PHEMA, was successfully synthesized and characterized by FT-IR, SEM, EDS, XRD and the weighing method. The loading of nZVI was 0.1548 ± 0.0015 g/g and the particle size was 30-100 nm. NZVI was uniformly dispersed on the pore walls inside the PNIPAm-PHEMA. Because of the well-dispersed nZVI, the highly porous structure, and the synergistic effect of PNIPAm-PHEMA, nZVI@PNIPAm-PHEMA showed excellent reductive activity and wide pH applicability. 95% of 4-NP in 100 mL of 400 mg/L 4-NP solution with initial pH 3.0-9.0 could be completely reduced into 4-AP by about 0.0548 g of fresh supported nZVI at 18-25 °C under stirring (110 r/min) within 45 min reaction time. A greater than 99% 4-NP degradation ratio was obtained when the initial pH was 5.0-9.0. The reduction of 4-NP by nZVI@PNIPAm-PHEMA was in agreement with the pseudo-first-order kinetics model with Kobs values of 0.0885-0.101 min-1. NZVI@PNIPAm-PHEMA was able to be recycled, and about 85% degradation ratio of 4-NP was obtained after its sixth reuse cycle. According to the temperature sensitivity of PNIPAm-PHEMA, nZVI@PNIPAm-PHEMA exhibited very good storage stability, and about 88.9% degradation ratio of 4-NP was obtained after its storage for 30 days. The hybrid reducer was highly efficient for the reduction of 2-NP, 3-NP, 2-chloro-4-nitrophenol and 2-chloro-4-nitrophenol. Our results suggest that PNIPAm-PHEMA could be a good potential carrier, with nZVI@PNIPAm-PHEMA having potential value in the application of reductive degradation of nitrophenol pollutants.
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Affiliation(s)
- Lixia Li
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Ruiwei Wang
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaodong Xing
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 310014, China.
| | - Wenqiang Qu
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shutong Chen
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yunlong Zhang
- School of Environment and safety engineering, Jiangsu University, Zhenjiang 212013, China
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Covalently Immobilized Lipase on a Thermoresponsive Polymer with an Upper Critical Solution Temperature as an Efficient and Recyclable Asymmetric Catalyst in Aqueous Media. ChemCatChem 2018. [DOI: 10.1002/cctc.201701512] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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5
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Ji X, Liu J, Liu L, Zhao H. Enzyme-polymer hybrid nanogels fabricated by thiol-disulfide exchange reaction. Colloids Surf B Biointerfaces 2016; 148:41-48. [DOI: 10.1016/j.colsurfb.2016.08.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 08/23/2016] [Accepted: 08/25/2016] [Indexed: 12/26/2022]
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6
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Hsieh SR, Reddy PM, Chang CJ, Kumar A, Wu WC, Lin HY. Exploring the Behavior of Bovine Serum Albumin in Response to Changes in the Chemical Composition of Responsive Polymers: Experimental and Simulation Studies. Polymers (Basel) 2016; 8:E238. [PMID: 30979331 PMCID: PMC6432219 DOI: 10.3390/polym8060238] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/13/2016] [Accepted: 06/13/2016] [Indexed: 01/06/2023] Open
Abstract
Knowledge of the interactions between polymer and protein is very important to fabricate the potential materials for many bio-related applications. In this regard, the present work investigated the effect of copolymers on the conformation and thermal stability of bovine serum albumin (BSA) with the aid of biophysical techniques such as fluorescence spectroscopy, circular dichroism (CD) spectroscopy and differential scanning calorimetry (DSC). In comparison with that of copolymer PGA-1.5, our fluorescence spectroscopy results reveal that the copolymer PGA-1, which has a lower PEGMA/AA ratio, shows greater influence on the conformation of BSA. Copolymers induced unfolding of the polypeptide chain of BSA, which was confirmed from the loss in the negative ellipticity of CD spectra. DSC results showed that the addition of PGA-1 and PGA-1.5 (0.05% (w/v) decreased the transition temperature by 14.8 and 11.5 °C, respectively). The results from the present study on the behavior of protein in response to changes in the chemical composition of synthetic polymers are significant for various biological applications such as enzyme immobilization, protein separations, sensor development and stimuli-responsive systems.
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Affiliation(s)
- Shih-Rong Hsieh
- Department of Surgery, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Section 4, Taichung 40705, Taiwan.
| | - P Madhusudhana Reddy
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Awanish Kumar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Wan-Chi Wu
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan.
| | - Hui-Yi Lin
- School of Pharmacy, China Medical University, 91, Hsueh-Shih Road, Taichung 40402, Taiwan.
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7
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Preparation of Cross-Linked Glucoamylase Aggregates Immobilization by Using Dextrin and Xanthan Gum as Protecting Agents. Catalysts 2016. [DOI: 10.3390/catal6060077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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8
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Wet and Dry Forms of Bacterial Cellulose Synthetized by Different Strains of Gluconacetobacter xylinus as Carriers for Yeast Immobilization. Appl Biochem Biotechnol 2016; 180:805-816. [PMID: 27188971 DOI: 10.1007/s12010-016-2134-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
Abstract
The present study aimed to explore and describe the properties of bacterial cellulose (BC) membranes obtained from three different strains of Gluconacetobacter xylinus for 72, 120, and 168 h, used as a carrier support for the immobilization of Saccharomyces cerevisiae. The experiments also included the analysis of glucose consumption and alcohol production during the fermentation process displayed by yeasts immobilized on the BC surface. The results of the present study demonstrate that the number of immobilized yeast cells is dependent on the type of cellulose-synthesizing strain, cellulose form, and duration of its synthesis. The BC in the form of wet membranes obtained after 3 days of synthesis displayed the most favorable properties as a carrier for yeast immobilization. The immobilization of yeast cells on BC, regardless of its form, increased the amount of the produced alcohol as compared to free cells. The yeast cells immobilized in BC were able to multiply on its surface during the fermentation process.
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Lai E, Wang Y, Wei Y, Li G, Ma G. Covalent immobilization of trypsin onto thermo-sensitive poly(N-isopropylacrylamide-co-acrylic acid) microspheres with high activity and stability. J Appl Polym Sci 2016. [DOI: 10.1002/app.43343] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Enping Lai
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering; Donghua University; Shanghai 201620 People's Republic of China
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Yuxia Wang
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Yi Wei
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Guang Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering; Donghua University; Shanghai 201620 People's Republic of China
| | - Guanghui Ma
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
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Oktay B, Demir S, Kayaman-Apohan N. Immobilization of α-amylase onto poly(glycidyl methacrylate) grafted electrospun fibers by ATRP. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 50:386-93. [DOI: 10.1016/j.msec.2015.02.033] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 01/05/2015] [Accepted: 02/23/2015] [Indexed: 10/24/2022]
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11
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Nwagu TN, Okolo B, Aoyagi H, Yoshida S. Improved yield and stability of amylase by multipoint covalent binding on polyglutaraldehyde activated chitosan beads: Activation of denatured enzyme molecules by calcium ions. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.05.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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12
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Pečová M, Šebela M, Marková Z, Poláková K, Čuda J, Šafářová K, Zbořil R. Thermostable trypsin conjugates immobilized to biogenic magnetite show a high operational stability and remarkable reusability for protein digestion. NANOTECHNOLOGY 2013; 24:125102. [PMID: 23466477 DOI: 10.1088/0957-4484/24/12/125102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this work, magnetosomes produced by microorganisms were chosen as a suitable magnetic carrier for covalent immobilization of thermostable trypsin conjugates with an expected applicability for efficient and rapid digestion of proteins at elevated temperatures. First, a biogenic magnetite was isolated from Magnetospirillum gryphiswaldense and its free surface was coated with the natural polysaccharide chitosan containing free amino and hydroxy groups. Prior to covalent immobilization, bovine trypsin was modified by conjugating with α-, β- and γ-cyclodextrin. Modified trypsin was bound to the magnetic carriers via amino groups using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysulfosuccinimide as coupling reagents. The magnetic biomaterial was characterized by magnetometric analysis and electron microscopy. With regard to their biochemical properties, the immobilized trypsin conjugates showed an increased resistance to elevated temperatures, eliminated autolysis, had an unchanged pH optimum and a significant storage stability and reusability. Considering these parameters, the presented enzymatic system exhibits properties that are superior to those of trypsin forms obtained by other frequently used approaches. The proteolytic performance was demonstrated during in-solution digestion of model proteins (horseradish peroxidase, bovine serum albumin and hen egg white lysozyme) followed by mass spectrometry. It is shown that both magnetic immobilization and chemical modification enhance the characteristics of trypsin making it a promising tool for protein digestion.
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Affiliation(s)
- M Pečová
- Department of Protein Biochemistry and Proteomics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 11, 783 71 Olomouc, Czech Republic
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Molawa L, Jordaan J, Limson J, Brady D. Modification of Alcalase SphereZyme™ by entrapment in LentiKats®to impart improved particle stability. BIOCATAL BIOTRANSFOR 2013. [DOI: 10.3109/10242422.2013.767335] [Citation(s) in RCA: 4] [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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Hamidi A, Rashidi MR, Asgari D, Aghanejad A, Davaran S. Covalent Immobilization of Trypsin on a Novel Aldehyde-Terminated PAMAM Dendrimer. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.7.2181] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pinto PC, Costa SP, Costa AD, Passos ML, Lima JL, Saraiva MLM. Trypsin activity in imidazolium based ionic liquids: evaluation of free and immobilized enzyme. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2012.04.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nwagu TN, Aoyagi H, Okolo BN, Yoshida S. Immobilization of a saccharifying raw starch hydrolyzing enzyme on functionalized and non-functionalized sepa beads. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.01.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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17
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Liu W, Duan H, Meng X, Qin D, Wang X, Zhang J. Immobilization ofCandida lipolyticalipase on macroporous beaded terpolymers with epoxy groups. J Appl Polym Sci 2012. [DOI: 10.1002/app.38023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Zhang Y, Liu T, Wang Q, Zhao J, Fang J, Shen W. Synthesis of novel poly(N,N-diethylacrylamide-co-acrylic acid) (P(DEA-co-AA)) microgels as carrier of horseradish peroxidase immobilization for pollution treatment. Macromol Res 2012. [DOI: 10.1007/s13233-012-0044-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ertan AB, Yılgor P, Bayyurt B, Çalıkoğlu AC, Kaspar Ç, Kök FN, Kose GT, Hasirci V. Effect of double growth factor release on cartilage tissue engineering. J Tissue Eng Regen Med 2011; 7:149-60. [DOI: 10.1002/term.509] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 07/22/2011] [Accepted: 07/26/2011] [Indexed: 01/05/2023]
Affiliation(s)
- Ayşe Burcu Ertan
- Department of Genetics and Bioengineering Yeditepe University, Faculty of Engineering and Architecture Istanbul Turkey
| | - Pınar Yılgor
- Department of Biochemistry Cukurova University Faculty of Medicine Balcali Adana Turkey
- BIOMATEN Centre of Excellence in Biomaterials of Tissue Engineering, Biotechnology Research Unit Middle East Technical University Ankara Turkey
| | - Banu Bayyurt
- Department of Molecular Biology and Genetics, Biotherapeutic ODN Lab Bilkent University Ankara Turkey
| | - Ayşe Ceren Çalıkoğlu
- Department of Genetics and Bioengineering Yeditepe University, Faculty of Engineering and Architecture Istanbul Turkey
| | - Çiğdem Kaspar
- Department of Medicine Yeditepe University Istanbul Turkey
| | - Fatma Neşe Kök
- Molecular Biology and Genetics Department Istanbul Technical University Maslak Istanbul Turkey
- BIOMATEN Centre of Excellence in Biomaterials of Tissue Engineering, Biotechnology Research Unit Middle East Technical University Ankara Turkey
| | - Gamze Torun Kose
- Department of Genetics and Bioengineering Yeditepe University, Faculty of Engineering and Architecture Istanbul Turkey
- BIOMATEN Centre of Excellence in Biomaterials of Tissue Engineering, Biotechnology Research Unit Middle East Technical University Ankara Turkey
| | - Vasif Hasirci
- BIOMATEN Centre of Excellence in Biomaterials of Tissue Engineering, Biotechnology Research Unit Middle East Technical University Ankara Turkey
- Department of Biological Sciences Middle East Technical University Ankara Turkey
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Encapsulation of enzymes in microgels by polymerization/cross-linking in aqueous droplets. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2392-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Affinity Covalent Immobilization of Glucoamylase onto ρ-Benzoquinone-Activated Alginate Beads: II. Enzyme Immobilization and Characterization. Appl Biochem Biotechnol 2010; 164:45-57. [DOI: 10.1007/s12010-010-9113-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Accepted: 10/11/2010] [Indexed: 10/18/2022]
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23
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Colleary S, Ó'Fágáin C. Stability and catalytic properties of chemically modified pig trypsin. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.3109/10242420903207592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Cullen SP, Mandel IC, Gopalan P. Surface-anchored poly(2-vinyl-4,4-dimethyl azlactone) brushes as templates for enzyme immobilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13701-13709. [PMID: 18956849 DOI: 10.1021/la8024952] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We explored surface-anchored poly(2-vinyl-4,4-dimethyl azlactone) (PVDMA) brushes as potential templates for protein immobilization. The brushes were grown using atom transfer radical polymerization from surface-anchored initiators and characterized by a combination of ellipsometry, atomic force microscopy, and X-ray photoelectron spectroscopy. RNase A was immobilized as a model enzyme through the nucleophilic attack of azlactone by the amine groups in the lysines located in the protein. The surface density of RNase A increased linearly from 5 to 50 nm. For 50 nm thick poly(2-vinyl-4,4-dimethyl azlactone) brushes, 7.5 microg/cm2 of RNase A was bound. The kinetics and thermodynamics of RNase A immobilization, the activity relative to surface density, and the pH and temperature dependence were examined. A Langmuir-like model for binding kinetics indicates that the kinetics are controlled by the rate of adsorption of RNase A and has an adsorption rate constant, k(ads), of 2.8 x 10(-8) microg(-1) s(-1) cm3. A maximum relative activity of approximately 0.95, which is near the activity of free RNase A, was reached at 1.2 microg/cm2 (approximately 3.0 monolayers) of immobilized RNase A. The immobilized RNase A had a similar temperature and pH dependence as free RNase A, indicating no significant change in conformation. The PVDMA template was extended to other biotechnologically relevant enzymes, such as deoxyribonuclease I, glucose oxidase, glucoamylase, and trypsin, with relative activities higher than or comparable to those of enzymes immobilized by other means. PVDMA brushes offer an efficient route to immobilize proteins via the ring opening of azlactone without the need for activation or pretreatment while retaining high relative activities of the bound enzymes.
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Affiliation(s)
- Sean P Cullen
- Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Gai L, Wu D. A Novel Reversible pH-Triggered Release Immobilized Enzyme System. Appl Biochem Biotechnol 2008; 158:747-60. [DOI: 10.1007/s12010-008-8373-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 09/15/2008] [Indexed: 11/29/2022]
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Zhao Q, Sun J, Ren H, Zhou Q, Lin Q. Horseradish peroxidase immobilized in macroporous hydrogel for acrylamide polymerization. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22557] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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The influence of composition of poly(n-isopropylacrylamide-co-itaconic acid) hydrogel on immobilized Candida rugosa lipase activity. HEMIJSKA INDUSTRIJA 2008. [DOI: 10.2298/hemind0806339m] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The application of lipases as catalysts in chemical reactions has been deterred by the high cost of isolation and purification of enzymes, the instability of their structure when they are isolated from their natural environment, contamination of products with residual protein, their sensitivity to process conditions, etc. These problems could be overcome using immobilized lipases. Immobilization is achieved by fixing enzymes to or within solid supports and as a result a heterogeneous system is obtained. The present paper reports on the immobilization of Candida rugosa lipase in hydrogels based on N-isopropylacrylamide and itaconic acid. Immobilization of lipase is carried out by two different methods. In the first method, lipase is added to the reaction mixture before polymerization and crosslinking (in situ polymerization), while in the second method the synthetized hydrogels are immersed in lipase solution and left to rich the equilibrium swelling. The specific activities of the immobilized lipase were determined in both cases and compared. The amount of the immobilized lipase is higher if the immobilization is carried out by immersing hydrogel in lipase solution. It was observed that in both cases lipase activity increases with an increase of the itaconic acid content up to 10 wt% and thereafter decreases. From the measurements of shear storage moduli (G') it was concluded that the increase of the itaconic acid content decreases the mechanical properties of the hydrogels. SEM analysis confirmed the highly porous structure of hydrogels. It was found that greater pores were achieved when the enzyme was immobilized by in situ polymerization. When the enzyme was immobilized by in situ polymerization the itaconic acid content had not great effect on the mass of the immobilized enzyme, except for the 100/0 sample. On the contrary, for the samples where the enzyme was immobilized by swelling, the increase of the itaconic acid content increases the mass of the immobilized enzyme. Concerning the activity of the immobilized lipase, the swelling degree and mechanical properties of the investigated hydrogels, the best results were performed by the 95/5 hydrogel sample.
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