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Wang Q, Fu H, Qi X, Zhang L, Ma H. Immobilization of horseradish peroxidase with zwitterionic polymer material for industrial phenolic removal. Biointerphases 2023; 18:041001. [PMID: 37410499 DOI: 10.1116/6.0002657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/06/2023] [Indexed: 07/07/2023] Open
Abstract
Horseradish peroxidase (HRP) is a hemoglobin composed of a single peptide chain that catalyzes the oxidation of various substrates such as phenol and aniline in the presence of hydrogen peroxide via its iron-porphyrin catalytic center. This enzyme is widely used in industrial phenol removal, food additives, biomedicine, and clinical test reagents due to its rapid reaction rate and obvious reaction outcomes. However, the large-scale use of HRP in industrial applications still faces numerous challenges, including activity, stability, and sustainability. This study demonstrates that when peroxidase is immobilized in zwitterionic polymer hydrogels, polycarboxybetaine (PCB) and polysulfobetaine (PSB), the properties of the enzyme are improved. PCB and PSB-embedded HRP exhibit a 6.11 and 1.53 times increase in Kcat/Km value, respectively, compared to the free enzyme. The immobilized enzyme also experiences increased activity over a range of temperatures and better tolerance to extreme pH and organic solvents, including formaldehyde. In addition, immobilized HRP exhibits excellent performance in storage and reproducibility. Remarkably, PCB-HRP still retains 80% of the initial activity after a 6-week storage period and can still attain the initial catalytic level of the free enzyme after six repeated cycles. It also removes 90% of phenol within 12 min, surpassing the current pharmacy on the market. These experimental results indicated that we have successfully designed a set of stable and efficient support substrates for horseradish peroxidase, which enhances its suitability for deployment in industrial applications.
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Affiliation(s)
- Qi Wang
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China
| | - Hao Fu
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China
| | - Xiaoyu Qi
- Department of Biochemical Engineering, Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Lei Zhang
- Department of Biochemical Engineering, Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Hongyan Ma
- Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China
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He X, Wu Q, Hou C, Hu M, Wang Q, Wang X. A Compartmentalized Nanoreactor Formed by Interfacial Hydrogelation for Cascade Enzyme Catalytic Therapy. Angew Chem Int Ed Engl 2023; 62:e202218766. [PMID: 36780198 DOI: 10.1002/anie.202218766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/27/2023] [Accepted: 02/13/2023] [Indexed: 02/14/2023]
Abstract
Some cellular enzymatic pathways are located within a single organelle, while most others involve enzymes that are located within multiple compartmentalized cellular organelles to realize the efficient multi-step enzymatic process. Herein, bioinspired by enzyme-mediated biosynthesis and biochemical defense, a compartmented nanoreactor (Burr-NCs@GlSOD ) was constructed through a self-confined catalysis strategy with burr defect-engineered molybdenum disulfide/Prussian blue analogues (MoS2 /PBA) and an interfacial diffusion-controlled hydrogel network. The specific catalytic mechanism of the laccase-like superactivity induced hydrogelation and cascade enzyme catalytic therapy were explored. The confined hydrogelation strategy introduces a versatile means for nanointerface functionalization and provides insight into biological construction of simulated enzymes with comparable activity and also the specificity to natural enzymes.
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Affiliation(s)
- Xingyue He
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China.,Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai, 200434, China
| | - Qing Wu
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Chen Hou
- Shanghai Synchrotron Radiation Facility (SSRF) from Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Min Hu
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Qigang Wang
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai, 200434, China
| | - Xia Wang
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China
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3
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Ma N, Liu J, Li L, Huang W, Qiu W, Zhang J, Kong J, Zhang X. Hemoglobin-catalyzed atom transfer radical polymerization for ultrasensitive electrochemical DNA detection. Biosens Bioelectron 2022; 213:114485. [PMID: 35760021 DOI: 10.1016/j.bios.2022.114485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/06/2022] [Accepted: 06/12/2022] [Indexed: 11/24/2022]
Abstract
The use of hemoglobin (Hb) to drive atom transfer radical polymerization (ATRP) process (Hb-ATRP) for detection of lung cancer related nucleic acid is firstly reported. Hb does not need to be treated prior to using indicating the potential for synthetic engineering in complex biological microenvironments without the need for in vitro techniques. Here, we report a new signal amplification strategy using Hb-mediated graft of nitronyl niroxide monoradical polymers as a signal-on electrochemical biosensor for ultralow level DNA highly selective detection. Building DNA biosensors includes: (i) the fixation of peptide nucleic acid (PNA) probe (no phosphate group) via the 5' terminus-SH; (ii) the modification of transition metal; (iii) Site-specific markers of Hb-ATRP promoter, and (iv) the grafting of polymers with electrochemical signal by Hb-ATRP process. Through the Hb-ATRP process of nitronyl nitroxide monoradical (TEMPO), the presence of a small amount of DNA can eventually result in calling a certain number of TEMPO redox tags. Obviously, the Hb-ATRP is a method of easy source of raw materials, simple operation and no need for complex equipment. The constructed biosensor, as expected, is highly selective and sensitive to target DNA. The detection limit can be calculated as 15.96 fM under optimal conditions. The excellent performance also shows that the constructed DNA biosensor is suitable for DNA screening and DNA concentration determination in complex sample matrix.
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Affiliation(s)
- Nan Ma
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu, 210094, PR China; Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, PR China
| | - Jingliang Liu
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, PR China
| | - Lianzhi Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, PR China
| | - Weibo Huang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu, 210094, PR China
| | - Wenhao Qiu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu, 210094, PR China
| | - Jian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, PR China
| | - Jinming Kong
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu, 210094, PR China.
| | - Xueji Zhang
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen Guangdong, 518060, PR China
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Sasaki Y, Konishi N, Kohri M, Taniguchi T, Kishikawa K, Karatsu T. Synthesis of luminescent core–shell polymer particles carrying amino groups for covalent immobilization of enzymes. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04913-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Divandari M, Arcifa A, Ayer MA, Letondor C, Spencer ND. Applying an Oleophobic/Hydrophobic Fluorinated Polymer Monolayer Coating from Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4387-4394. [PMID: 33789046 DOI: 10.1021/acs.langmuir.1c00479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Despite major advancements in the fabrication of low-surface-energy surfaces, the environmental consequences of their fabrication can be a serious issue, particularly in an industrial context. This is especially the case for fluorine-based coatings, which often require fluorinated solvents for their processing and applications. These solvents are not only detrimental to the ozone layer but also represent a potential workplace hazard because they tend to bioaccumulate. We describe the design, synthesis, and characterization of a new fluorinated-polymer coating that can be simply applied to surfaces from an aqueous environment using a dip-coating technique. This was made possible by copolymerizing three different methacrylate monomers, each serving a specific function. Namely, fluorinated methacrylate providing oleo/hydrophobicity, photocleavable polyethylene glycol (PEG) methacrylate promoting water solubility of the copolymer, and thioether-based methacrylate serving as an anchoring unit to a number of different substrates. This copolymer is initially grafted to the surface as a monolayer from an aqueous solvent, after which the system is treated with ultraviolet (UV) light, cleaving away the protecting PEG moieties to yield an oleo/hydrophobic surface.
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Affiliation(s)
- Mohammad Divandari
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Andrea Arcifa
- Surface Science and Coating Technologies, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Mathieu A Ayer
- The Swatch Group Research and Development Ltd, CH-2074 Marin, Switzerland
| | | | - Nicholas D Spencer
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
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A novel silane coupling agent with peroxy groups used as an initiator in the graft polymerization of AN or MMA on nano-TiO2. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0524-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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8
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Synthesis and Application of Silica Nanoparticles-Based Biohybrid Sorbents. BIO- AND NANOSORBENTS FROM NATURAL RESOURCES 2018. [DOI: 10.1007/978-3-319-68708-7_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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9
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Divandari M, Pollard J, Dehghani E, Bruns N, Benetti EM. Controlling Enzymatic Polymerization from Surfaces with Switchable Bioaffinity. Biomacromolecules 2017; 18:4261-4270. [PMID: 29086550 DOI: 10.1021/acs.biomac.7b01313] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The affinity of surfaces toward proteins is found to be a key parameter to govern the synthesis of polymer brushes by surface-initiated biocatalytic atom transfer radical polymerization (SI-bioATRP). While the "ATRPase" hemoglobin (Hb) stimulates only a relatively slow growth of protein repellent brushes, the synthesis of thermoresponsive grafts can be regulated by switching the polymer's attraction toward proteins across its lower critical solution temperature (LCST). Poly(N-isopropylacrylamide) (PNIPAM) brushes are synthesized in discrete steps of thickness at temperatures above LCST, while the biocatalyst layer is refreshed at T < LCST. Multistep surface-initiated biocatalytic ATRP demonstrates a high degree of control, results in high chain end group fidelity and enables the synthesis of multiblock copolymer brushes under fully aqueous conditions. The activity of Hb can be further modulated by tuning the accessibility of the heme pocket within the protein. Hence, the multistep polymerization is accelerated at acid pH, where the enzyme undergoes a transition from its native to a molten globule conformation. The controlled synthesis of polymer brushes by multistep SI-bioATRP highlights how a biocatalytic synthesis of grafted polymer films can be precisely controlled through the modulation of the polymer's interfacial physicochemical properties, in particular of the affinity of the surface toward proteins. This is not only of importance to gain a predictive understanding of surface-confined enzymatic polymerizations, but also represents a new way to translate bioadhesion into a controlled functionalization of materials.
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Affiliation(s)
- Mohammad Divandari
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich , Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Jonas Pollard
- Adolphe Merkle Institute , Chemin des Verdiers 4, CH-1700 Fribourg, Switzerland
| | - Ella Dehghani
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich , Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Nico Bruns
- Adolphe Merkle Institute , Chemin des Verdiers 4, CH-1700 Fribourg, Switzerland
| | - Edmondo M Benetti
- Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich , Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
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Qiao L, Wang X, Gao Y, Wei Q, Hu W, Wu L, Li P, Zhu R, Wang Q. Laccase-mediated formation of mesoporous silica nanoparticle based redox stimuli-responsive hybrid nanogels as a multifunctional nanotheranostic agent. NANOSCALE 2016; 8:17241-17249. [PMID: 27722385 DOI: 10.1039/c6nr05943k] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we designed a new hybrid nanogel with redox responsive polymer gel shells and mesoporous silica nanoparticles (MSNs) cores via laccase-mediated radical polymerization. The successful coating of the responsive gel shells on the MSNs was confirmed by the morphology and increased diameters of the particles as determined by transmission electron microscopy (TEM) and dynamic light scattering (DLS). As observed by scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy (EDS), the presence of the element S around the MSNs further confirmed the formation of the gel shell. When loaded with doxorubicin (DOX), these hybrid nanogels had a significantly higher cumulative DOX release in a reductive environment than that found under physiological conditions. The MSNs with mesoporous channels were loaded with perfluorohexane (PFH) for ultrasound imaging, which was enhanced by the presence of the elastic gel shells.
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Affiliation(s)
- Li Qiao
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Xia Wang
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Yawei Gao
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Qingcong Wei
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Wen Hu
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Lei Wu
- Department of Ultrasound in Medicine Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Pei Li
- Department of Medical Ultrasound Shanghai Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Rongrong Zhu
- School of Life Sciences and Technology, Tongji University, Shanghai 200092, China
| | - Qigang Wang
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
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11
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12
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Malinowska KH, Nash MA. Enzyme- and affinity biomolecule-mediated polymerization systems for biological signal amplification and cell screening. Curr Opin Biotechnol 2016; 39:68-75. [DOI: 10.1016/j.copbio.2016.01.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 01/23/2016] [Indexed: 11/28/2022]
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13
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Zavada SR, Battsengel T, Scott TF. Radical-Mediated Enzymatic Polymerizations. Int J Mol Sci 2016; 17:E195. [PMID: 26848652 PMCID: PMC4783929 DOI: 10.3390/ijms17020195] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 02/04/2023] Open
Abstract
Polymerization reactions are commonly effected by exposing monomer formulations to some initiation stimulus such as elevated temperature, light, or a chemical reactant. Increasingly, these polymerization reactions are mediated by enzymes--catalytic proteins--owing to their reaction efficiency under mild conditions as well as their environmental friendliness. The utilization of enzymes, particularly oxidases and peroxidases, for generating radicals via reduction-oxidation mechanisms is especially common for initiating radical-mediated polymerization reactions, including vinyl chain-growth polymerization, atom transfer radical polymerization, thiol-ene step-growth polymerization, and polymerization via oxidative coupling. While enzyme-mediated polymerization is useful for the production of materials intended for subsequent use, it is especially well-suited for in situ polymerizations, where the polymer is formed in the place where it will be utilized. Such polymerizations are especially useful for biomedical adhesives and for sensing applications.
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Affiliation(s)
- Scott R Zavada
- Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Tsatsral Battsengel
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Timothy F Scott
- Department of Chemical Engineering and Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI 48109, USA.
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Zhang B, Wang X, Zhu A, Ma K, Lv Y, Wang X, An Z. Enzyme-Initiated Reversible Addition–Fragmentation Chain Transfer Polymerization. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01893] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Baohua Zhang
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Xinjun Wang
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Anqi Zhu
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Kai Ma
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Yue Lv
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Xiao Wang
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Zesheng An
- Institute of Nanochemistry
and Nanobiology, ‡College of Environmental Science
and Chemical Engineering, and §Department of Chemistry, Shanghai University, Shanghai 200444, China
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15
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Development of HRP-mediated enzymatic polymerization under heterogeneous conditions for the preparation of functional particles. Polym J 2014. [DOI: 10.1038/pj.2014.13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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16
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Kohri M, Kobayashi A, Nannichi Y, Taniguchi T, Kishikawa K. A Green Approach for the Synthesis of Fluorescent Polymer Particles by Combined Use of Enzymatic Miniemulsion Polymerization with Clickable Surfmer and Click Reaction. ACTA ACUST UNITED AC 2014. [DOI: 10.14723/tmrsj.39.57] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michinari Kohri
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Ayaka Kobayashi
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Yuri Nannichi
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Tatsuo Taniguchi
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Keiki Kishikawa
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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Griffete N, Ahmad R, Benmehdi H, Lamouri A, Decorse P, Mangeney C. Elaboration of hybrid silica particles using a diazonium salt chemistry approach. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.071] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Biofuel that Keeps Glycerol as Monoglyceride by 1,3-Selective Ethanolysis with Pig Pancreatic Lipase Covalently Immobilized on AlPO4 Support. ENERGIES 2013. [DOI: 10.3390/en6083879] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Silva TB, Spulber M, Kocik MK, Seidi F, Charan H, Rother M, Sigg SJ, Renggli K, Kali G, Bruns N. Hemoglobin and red blood cells catalyze atom transfer radical polymerization. Biomacromolecules 2013; 14:2703-12. [PMID: 23739032 DOI: 10.1021/bm400556x] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hemoglobin (Hb) is a promiscuous protein that not only transports oxygen, but also catalyzes several biotransformations. A novel in vitro catalytic activity of Hb is described. Bovine Hb and human erythrocytes were found to display ATRPase activity, i.e., they catalyzed the polymerization of vinyl monomers under conditions typical for atom transfer radical polymerization (ATRP). N-isopropylacrylamide (NIPAAm), poly(ethylene glycol) methyl ether acrylate (PEGA), and poly(ethylene glycol) methyl ether methacrylate (PEGMA) were polymerized using organobromine initiators and the reducing agent ascorbic acid in acidic aqueous solution. In order to avoid chain transfer from polymer radicals to Hb's cysteine residues, the accessible cysteines were blocked by a reaction with a maleimide. The formation of polymers with bromine chain ends, relatively low polydispersity indices (PDI), first order kinetics and an increase in the molecular weight of poly(PEGA) and poly(PEGMA) upon conversion indicate that control of the polymerization by Hb occurred via reversible atom transfer between the protein and the growing polymer chain. For poly(PEGA) and poly(PEGMA), the reactions proceeded with a good to moderate degree of control. Sodium dodecyl sulfate (SDS) gel electrophoresis, circular dichroism spectroscopy, and time-resolved ultraviolet-visible (UV-vis) spectroscopy revealed that the protein was stable during polymerization, and only underwent minor conformational changes. As Hb and erythrocytes are readily available, environmentally friendly, and nontoxic, their ATRPase activity is a useful tool for synthetic polymer chemistry. Moreover, this novel activity enhances the understanding of Hb's redox chemistry in the presence of organobromine compounds.
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Affiliation(s)
- Tilana B Silva
- Department of Chemistry, University of Basel, Switzerland
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KOHRI M. Development of Environmentally-Friendly Preparation and Surface-Modification of Polymer Particles by Enzymatic Polymerization. KOBUNSHI RONBUNSHU 2013. [DOI: 10.1295/koron.70.386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Kohri M, Kobayashi A, Fukushima H, Taniguchi T, Nakahira T. Effect of Surfactant Type on Enzymatic Miniemulsion Polymerization Using Horseradish Peroxidase as a Catalyst. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1131] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michinari Kohri
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Ayaka Kobayashi
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Haruka Fukushima
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Tatsuo Taniguchi
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Takayuki Nakahira
- Division of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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New biofuel integrating glycerol into its composition through the use of covalent immobilized pig pancreatic lipase. Int J Mol Sci 2012; 13:10091-10112. [PMID: 22949849 PMCID: PMC3431847 DOI: 10.3390/ijms130810091] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/26/2012] [Accepted: 08/02/2012] [Indexed: 11/17/2022] Open
Abstract
By using 1,3-specific Pig Pancreatic lipase (EC 3.1.1.3 or PPL), covalently immobilized on AlPO(4)/Sepiolite support as biocatalyst, a new second-generation biodiesel was obtained in the transesterification reaction of sunflower oil with ethanol and other alcohols of low molecular weight. The resulting biofuel is composed of fatty acid ethyl esters and monoglycerides (FAEE/MG) blended in a molar relation 2/1. This novel product, which integrates glycerol as monoacylglycerols (MG) into the biofuel composition, has similar physicochemical properties compared to those of conventional biodiesel and also avoids the removal step of this by-product. The biocatalyst was found to be strongly fixed to the inorganic support (75%). Nevertheless, the efficiency of the immobilized enzyme was reduced to half (49.1%) compared to that of the free PPL. The immobilized enzyme showed a remarkable stability as well as a great reusability (more than 40 successive reuses) without a significant loss of its initial catalytic activity. Immobilized and free enzymes exhibited different reaction mechanisms, according to the different results in the Arrhenius parameters (Ln A and Ea). However, the use of supported PPL was found to be very suitable for the repetitive production of biofuel due to its facile recyclability from the reaction mixture.
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Kohri M, Uzawa S, Kobayashi A, Fukushima H, Taniguchi T, Nakahira T. Enzymatic emulsifier-free emulsion polymerization to prepare polystyrene particles using horseradish peroxidase as a catalyst. Polym J 2012. [DOI: 10.1038/pj.2012.129] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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