51
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Yarman A, Peng L, Wu Y, Bandodkar A, Gajovic-Eichelmann N, Wollenberger U, Hofrichter M, Ullrich R, Scheibner K, Scheller FW. Can peroxygenase and microperoxidase substitute cytochrome P450 in biosensors. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s12566-011-0023-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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52
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Hydrogen bioelectrooxidation in ionic liquids: From cytochrome c3 redox behavior to hydrogenase activity. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.104] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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53
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Akdogan Y, Junk MJN, Hinderberger D. Effect of Ionic Liquids on the Solution Structure of Human Serum Albumin. Biomacromolecules 2011; 12:1072-9. [DOI: 10.1021/bm1014156] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasar Akdogan
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Matthias J. N. Junk
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Dariush Hinderberger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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54
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Wei W, Danielson ND. Fluorescence and circular dichroism spectroscopy of cytochrome c in alkylammonium formate ionic liquids. Biomacromolecules 2011; 12:290-7. [PMID: 21210672 DOI: 10.1021/bm1008052] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structural stability of cytochrome c has been studied in alkylammonium formate (AAF) ionic liquids such as methylammonium formate (MAF) and ethylammonium formate (EAF) by fluorescence and circular dichroism (CD) spectroscopy. At room temperature, the native structure of cytochrome c is maintained in relatively high ionic liquid concentrations (50-70% AAF/water or AAF/phosphate buffer pH 7.0) in contrast with denaturation of cytochrome c in similar solutions of methanol or acetonitrile with water or buffer cosolvents. Fluorescence and CD spectra indicate that the conformation of cytochrome c is maintained in 20% AAF-80% water from 30 to 50 °C. No such temperature stability is found in 80% AAF-20% water. About one-third of the enzyme activity of cytochrome c in 80% AAF-20% water can be maintained as compared with phosphate buffer, and this is greater than the activities measured in corresponding methanol and acetonitrile aqueous solutions. This biophysical study shows that AAFs have potential application as organic solvent replacements at moderate temperature in the mobile phase for the separation of proteins in their native form by reversed phase liquid chromatography.
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Affiliation(s)
- Wenjun Wei
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, USA
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55
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Meng H, Chen XW, Wang JH. One-pot synthesis of N,N-bis[2-methylbutyl] imidazolium hexafluorophosphate–TiO2 nanocomposites and application for protein isolation. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11918d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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56
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Eisenstadt MA, Bogolitsyn KG. Peroxidase oxidation of lignin and its model compounds. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2010. [DOI: 10.1134/s1068162010070034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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57
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Bihari M, Russell TP, Hoagland DA. Dissolution and dissolved state of cytochrome C in a neat, hydrophilic ionic liquid. Biomacromolecules 2010; 11:2944-8. [PMID: 20929217 DOI: 10.1021/bm100735z] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dissolution and dissolved molecular state of cytochrome c were investigated in the room temperature ionic liquid ethylmethylimidazolium ethylsulfate, [EMIM][EtSO4], by viscometry, optical and vibrational spectroscopies, and peroxidase activity. In dilute mixtures, viscometry demonstrated true molecular dissolution of cytochrome c in the ionic liquid and uncovered a molecular size larger than that in aqueous buffer, suggesting altered solvation or slight denaturation. The protein's heme unit absorbs light outside the spectral range masked by [EMIM], enabling conformational assessments by UV-visible and circular dichroism spectroscopies. Adding trends from fluorescence and Fourier transform infrared spectroscopy, unchanged secondary but perturbed tertiary structures were determined, consistent with the appreciable peroxidase activity measured. Different than in aqueous buffers, denaturation is not accompanied by aggregation. Results are relevant to the proposed application of ionic liquids as media for room temperature preservation of biomacromolecules.
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Affiliation(s)
- Malvika Bihari
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003
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58
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Heller WT, O’Neill HM, Zhang Q, Baker GA. Characterization of the Influence of the Ionic Liquid 1-Butyl-3-methylimidazolium Chloride on the Structure and Thermal Stability of Green Fluorescent Protein. J Phys Chem B 2010; 114:13866-71. [DOI: 10.1021/jp105611b] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William T. Heller
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Hugh M. O’Neill
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Qiu Zhang
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gary A. Baker
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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59
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Takács B, Nagy L, Kollár L, Nagy G. Investigation of Oxidoreductase Enzyme Catalysis in Water-Ionic Liquid (IL) Solvent Mixtures. ANAL LETT 2010. [DOI: 10.1080/00032711003653817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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60
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Muginova SV, Galimova AZ, Polyakov AE, Shekhovtsova TN. Ionic liquids in enzymatic catalysis and biochemical methods of analysis: Capabilities and prospects. JOURNAL OF ANALYTICAL CHEMISTRY 2010. [DOI: 10.1134/s1061934810040027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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61
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Farivar F, Moosavi-Movahedi AA, Sefidbakht Y, Nazari K, Hong J, Sheibani N. Cytochrome c in sodium dodecyl sulfate reverse micelle nanocage: From a classic electron carrier protein to an artificial peroxidase enzyme. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2009.11.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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62
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Cromie SRT, Del Pópolo MG, Ballone P. Interaction of room temperature ionic liquid solutions with a cholesterol bilayer. J Phys Chem B 2010; 113:11642-8. [PMID: 19655771 DOI: 10.1021/jp904060y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Water solutions of representative ([C4mim][Cl] and [C4mim][Tf2N]) room temperature ionic liquids (ILs) in contact with a neutral lipid bilayer made of cholesterol molecules has been investigated by molecular dynamics simulations based on an empirical force field model. The results show that both ILs display selective adsorption at the water-cholesterol interface, with partial inclusion of ions into the bilayer. In the case of [C4mim][Cl], the adsorption of ions at the water-cholesterol interface is limited by a sizable bulk solubility of the IL, driven by the high water affinity of [Cl]-. The relatively low solubility of [C4mim][Tf2N], instead, gives rise to a nearly complete segregation of the IL component on the bilayer, altering its volume, compressibility, and electrostatic environment. The computational results display important similarities to the results of recent experimental measurements for ILs in contact with phospholipid model membranes (see Evans, K. O. Int. J. Mol. Sci. 2008, 9, 498-511 and references therein).
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Affiliation(s)
- S R T Cromie
- Atomistic Simulation Centre, Queen's University Belfast, Belfast BT7 1NN, UK
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63
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64
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Brusova Z, Magner E. Kinetics of oxidation of hydrogen peroxide at hemin-modified electrodes in nonaqueous solvents. Bioelectrochemistry 2009; 76:63-9. [DOI: 10.1016/j.bioelechem.2009.02.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 02/11/2009] [Accepted: 02/27/2009] [Indexed: 11/25/2022]
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65
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66
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A strategy for immobilisation of carbon nanotubes homogenised in room temperature ionic liquids on carbon electrodes. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.04.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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67
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Wang LS, Wang L, Wang L, Wang G, Li ZH, Wang JJ. Effect of 1-butyl-3-methylimidazolium tetrafluoroborate on the wheat (Triticum aestivum L.) seedlings. ENVIRONMENTAL TOXICOLOGY 2009; 24:296-303. [PMID: 18767141 DOI: 10.1002/tox.20435] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Although many studies describe ionic liquids (ILs) as potentially greener solvents, few studies address their relationship with the environment. Recent researches suggest that some ILs have toxicity. 1-Butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]) was reported to have the lowest toxicity among ILs. In this work, we studied the toxicity of this IL on wheat seedlings. It was shown that wheat germination was reduced to 38.0% in the presence of 4.4 mmol/L [C4mim][BF4] compared with 100% germination for the control. Similarly, the root and shoot length of wheat seedlings decreased with increasing concentrations of [C4mim][BF4]. The activity of amylase increased in shoots and roots, but it decreased significantly in germinating seeds when the [C4mim][BF4] concentration exceeded 1.8 mmol/L. Peroxidase (POD) activity and soluble protein content in shoots treated with [C4mim][BF4] changed similarly, but chlorophyll content tended to decrease with increasing concentration of [C4mim][BF4], except for at 1.8 mmol/L. Thus, [C4mim][BF4] at the concentration of 0.9 mmol/L or more was toxic to wheat seedlings. Some remedial measures are suggested to deal with IL pollution in the environment.
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Affiliation(s)
- Lin-Song Wang
- School of Life Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
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68
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Electrodeposition of chitosan–ionic liquid–glucose oxidase biocomposite onto nano-gold electrode for amperometric glucose sensing. Biosens Bioelectron 2009; 24:2898-903. [DOI: 10.1016/j.bios.2009.02.027] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 02/19/2009] [Accepted: 02/20/2009] [Indexed: 02/07/2023]
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69
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Kinetic analysis for suicide-substrate inactivation of microperoxidase-11: A modified model for bisubstrate enzymes in the presence of reversible inhibitors. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.04.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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70
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Lichtenecker RJ, Schmid W. Application of various ionic liquids as cosolvents for chloroperoxidase-catalysed biotransformations. MONATSHEFTE FUR CHEMIE 2008. [DOI: 10.1007/s00706-008-0081-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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71
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Khosraneh M, Mahmoudi A, Rahimi H, Nazari K, Moosavi-Movahedi AA. Suicide-Peroxide inactivation of microperoxidase-11: A kinetic study. J Enzyme Inhib Med Chem 2008; 22:677-84. [DOI: 10.1080/14756360701270683] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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72
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Hussain W, Pollard DJ, Truppo M, Lye GJ. Enzymatic ketone reductions with co-factor recycling: Improved reactions with ionic liquid co-solvents. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2008.01.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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73
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Yu J, Zhao T, Zhao F, Zeng B. Direct electron transfer of hemoglobin immobilized in a mesocellular siliceous foams supported room temperature ionic liquid matrix and the electrocatalytic reduction of H2O2. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.03.059] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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74
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Tarasova NP, Smetannikov YV, Artemkina IM, Vilesov AS. Influence of Media on Processes of Radiation-Induced Polymerization of White Phosphorus. PHOSPHORUS SULFUR 2008. [DOI: 10.1080/10426500701765004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- N. P. Tarasova
- a D.I. Mendeleyev University of Chemical Technology of Russia , Miusskay sq., 9, Moscow, 125047, Russia
| | - Yu. V. Smetannikov
- a D.I. Mendeleyev University of Chemical Technology of Russia , Miusskay sq., 9, Moscow, 125047, Russia
| | - I. M. Artemkina
- a D.I. Mendeleyev University of Chemical Technology of Russia , Miusskay sq., 9, Moscow, 125047, Russia
| | - A. S. Vilesov
- a D.I. Mendeleyev University of Chemical Technology of Russia , Miusskay sq., 9, Moscow, 125047, Russia
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75
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Sun W, Gao R, Li X, Wang D, Yang M, Jiao K. Fabrication and Electrochemical Behavior of Hemoglobin Modified Carbon Ionic Liquid Electrode. ELECTROANAL 2008. [DOI: 10.1002/elan.200704131] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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76
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Characterisation and application of carbon film electrodes in room temperature ionic liquid media. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2007.12.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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77
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Supported phospholipid bilayer interaction with components found in typical room-temperature ionic liquids - a QCM-D and AFM Study. Int J Mol Sci 2008; 9:498-511. [PMID: 19325765 PMCID: PMC2635696 DOI: 10.3390/ijms9040498] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Revised: 02/26/2008] [Accepted: 03/14/2008] [Indexed: 11/17/2022] Open
Abstract
Quartz crystal microbalance with dissipation (QCM-D) monitoring and atomic force microscopy (AFM) were combined to evaluate the defects created by an ionic liquid anion and a cation in a supported phospholipid bilayer composed of zwitterionic lipids on a silica surface. The cation 1-octyl-3-methyl imidazolium (OMIM(+)) was shown to remove lipids from the bilayer, increase the roughness to approximately 2.8 nm (~0.2 for stable supported bilayer) and possibly redeposit lipids with entrapped water. The anion bis(trifluoromethylsulfonyl)imide (Tf(2)N(-)) was found to leave distinct defects within the bilayer that had large pore-like interiors which left the surrounding bilayer intact. However, the ionic liquid 1-butyl-1-methyl pyrrolidinium bis(trifluoromethylsulfonyl)imide (BMP-Tf(2)N) formed a film over the supported bilayer. This work demonstrates, for the first time, the direct effects common components of ionic liquids have on a supported phospholipids bilayer.
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78
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Pauliukaite R, Doherty A, Murnaghan K, Brett C. Application of Some Room Temperature Ionic Liquids in the Development of Biosensors at Carbon Film Electrodes. ELECTROANAL 2008. [DOI: 10.1002/elan.200704081] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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79
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Nakashima K, Maruyama T, Kamiya N, Goto M. Spectrophotometric assay for protease activity in ionic liquids using chromogenic substrates. Anal Biochem 2008; 374:285-90. [DOI: 10.1016/j.ab.2007.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Revised: 11/06/2007] [Accepted: 11/09/2007] [Indexed: 10/22/2022]
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80
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PINTO PCAG, SARAIVA MLMFS, LIMA JLFC. Oxidoreductase Behavior in Ionic Liquids: a Review. ANAL SCI 2008; 24:1231-8. [DOI: 10.2116/analsci.24.1231] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Paula C. A. G. PINTO
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto
| | | | - José L. F. C. LIMA
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto
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81
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Wei D, Ivaska A. Applications of ionic liquids in electrochemical sensors. Anal Chim Acta 2008; 607:126-35. [DOI: 10.1016/j.aca.2007.12.011] [Citation(s) in RCA: 557] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Revised: 12/11/2007] [Accepted: 12/11/2007] [Indexed: 11/24/2022]
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82
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Affiliation(s)
- Fred van Rantwijk
- Laboratory of Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
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83
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84
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Xiong HY, Chen T, Zhang XH, Wang SF. Electrochemical property and analysis application of biosensors in miscible nonaqueous media—Room-temperature ionic liquid. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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85
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Affiliation(s)
- Vasile I Pârvulescu
- Department of Chemical Technology and Catalysis, University of Bucharest, B-dul Regina Elisabeta 4-12, Bucharest 030016, Romania. v_parvulescu@ chem.unibuc.ro
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86
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Du Z, Yu YL, Wang JH. Extraction of proteins from biological fluids by use of an ionic liquid/aqueous two-phase system. Chemistry 2007; 13:2130-7. [PMID: 17136782 DOI: 10.1002/chem.200601234] [Citation(s) in RCA: 256] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An ionic liquid/aqueous two-phase system based on the hydrophilic ionic liquid 1-butyl-3-methylimidazolium chloride (BmimCl) and K(2)HPO(4) has been employed for direct extraction of proteins from human body fluids for the first time. Proteins present at low levels were quantitatively extracted into the BmimCl-rich upper phase with a distribution ratio of about 10 between the upper and lower phase and an enrichment factor of 5. Addition of an appropriate amount of K(2)HPO(4) to the separated upper phase results in a further phase separation, giving rise to an improved enrichment factor of 20. FTIR and UV spectroscopy demonstrated that no chemical (bonding) interactions between the ionic liquid and the protein functional groups were identifiable, while no alterations of the natural properties of the proteins were observed. The partitioning of proteins in the two-phase system was assumed to have been facilitated by the electrostatic potential difference between the coexisting phases, as well as by salting out effects. The system could be applied successfully for the quantification of proteins in human urine after on-line phase separation in a flow system. The use of an ionic liquid, as a green solvent, offers clear advantages over traditional liquid-liquid extractions, in which the use of toxic organic solvents is unavoidable.
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Affiliation(s)
- Zhuo Du
- Research Center for Analytical Sciences, Box 332, Northeastern University, Shenyang 110004, China
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87
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Wei S, Dandan W, Ruifang G, Kui J. Direct electrochemistry and electrocatalysis of hemoglobin in sodium alginate film on a BMIMPF6 modified carbon paste electrode. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.01.003] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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88
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Eker B, Asuri P, Murugesan S, Linhardt RJ, Dordick JS. Enzyme–Carbon Nanotube Conjugates in Room-temperature Ionic Liquids. Appl Biochem Biotechnol 2007; 143:153-63. [DOI: 10.1007/s12010-007-0035-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Revised: 11/30/1999] [Accepted: 03/05/2007] [Indexed: 10/23/2022]
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89
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Shimojo K, Kamiya N, Tani F, Naganawa H, Naruta Y, Goto M. Extractive solubilization, structural change, and functional conversion of cytochrome c in ionic liquids via crown ether complexation. Anal Chem 2007; 78:7735-42. [PMID: 17105166 DOI: 10.1021/ac0612877] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article reports on the extraction behavior of heme proteins from an aqueous phase into ionic liquids (ILs) with dicyclohexano-18-crown-6 (DCH18C6), and the structure-function relationship of cytochrome c (Cyt-c) dissolved in ILs. We have found that DCH18C6 enables transfer of Lys-rich proteins into ILs via supramolecular complexation. The hydrophobicity and functional groups of ILs have a great influence on protein partitioning, and a hydroxyl group-containing IL with DCH18C6 is capable of the quantitative partitioning of Cyt-c. On the other hand, protein transfer using conventional organic solvents is negligibly small. UV-visible, CD, and resonance Raman spectroscopic characterizations indicate that the sixth ligand Met 80 in the heme group of the Cyt-c-DCH18C6 complex in IL is replaced by other amino acid residues of the peptide chain and that a non-natural, six-coordinate, low-spin ferric heme structure is induced in IL. Solubilization of Cyt-c in IL causes the environmental change of the heme vicinity of Cyt-c, which triggers the functional conversion of Cyt-c from an electron-transfer protein to peroxidase. The Cyt-c-DCH18C6 complex in IL provides remarkably high peroxidase activity compared with native Cyt-c, because of enhancement of the affinity for H2O2.
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Affiliation(s)
- Kojiro Shimojo
- Division of Environment and Radiation Sciences, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai-mura, Ibaraki, 319-1195, Japan. shimojo.kojiro@ jaea.go.jp
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90
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Huang X, Guo S, Zhou Q, Lu T, Ding X. Effect of La3+ on structure and electrochemical reaction of microperoxidase-11 in imitated physiological solution. J Electroanal Chem (Lausanne) 2007. [DOI: 10.1016/j.jelechem.2006.10.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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91
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Safavi A, Maleki N, Bagheri M. Modification of chemical performance of dopants in xerogel films with entrapped ionic liquid. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b613288j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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92
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Fujita K, Forsyth M, MacFarlane DR, Reid RW, Elliott GD. Unexpected improvement in stability and utility of cytochrome c by solution in biocompatible ionic liquids. Biotechnol Bioeng 2006; 94:1209-13. [PMID: 16615145 DOI: 10.1002/bit.20928] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Proteins generally are only stable in vitro for short periods of time. This results in challenges during isolation and purification of recombinant proteins and reduces the shelf life of protein-based pharmaceuticals. Here we show that certain novel, biocompatible ionic liquids provide a stabilizing solvent for proteins, for example, cytochrome c, such that structure and activity are maintained even after 6 months of storage at room temperature. Normally, this protein would be rendered inactive after only 1 week in buffered aqueous solution. The effect of the ionic liquid solvent appears to be related to protection against hydrolysis.
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Affiliation(s)
- Kyoko Fujita
- School of Chemistry, Monash University, Clayton Victoria 3800, Australia
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93
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Wiwatchaiwong S, Matsumura H, Nakamura N, Yohda M, Ohno H. Stability of Thermophilic Cytochrome P450 Modified with Poly(ethylene oxide) in Ionic Liquid. CHEM LETT 2006. [DOI: 10.1246/cl.2006.798] [Citation(s) in RCA: 8] [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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94
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Lutz-Wahl S, Trost EM, Wagner B, Manns A, Fischer L. Performance of d-amino acid oxidase in presence of ionic liquids. J Biotechnol 2006; 124:163-71. [PMID: 16516324 DOI: 10.1016/j.jbiotec.2006.01.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2005] [Revised: 11/24/2005] [Accepted: 01/04/2006] [Indexed: 11/19/2022]
Abstract
The activity and stability of free and immobilized D-amino acid oxidase (DAAO, EC 1.4.3.3) from Trigonopsis variabilis CBS 4095 in different water-soluble and water-insoluble ionic liquids (ILs) as well as in organic solvents were studied for comparison. The most promising ILs ([BMIM][BF(4)] and [MMIM][MMPO(4)]) were investigated in detail. The kinetic parameters (v(max) = 187 nkat/g dry weight, K(M) = 1.38 mM) with D-phenylalanine as substrate were calculated in 40% [BMIM][BF(4)]. Bioconversions of D/L-phenylalanine in 40% [BMIM][BF(4)] and 20% [MMIM][MMPO(4)] on a 3 ml scale using immobilized DAAO were performed by addition of free catalase from Micrococcus lysodeikticus. After total conversion of substrate in presence of 20% [MMIM][MMPO(4)] the residual activity of the immobilized DAAO was 79% and 100% of the free catalase.
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Affiliation(s)
- S Lutz-Wahl
- Department of Biotechnology, Institute of Food Technology, University of Hohenheim, Stuttgart, Germany
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95
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Roy S, Dasgupta A, Das PK. Tailoring of horseradish peroxidase activity in cationic water-in-oil microemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:4567-73. [PMID: 16649765 DOI: 10.1021/la0602867] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Horseradish peroxidase (HRP) in cationic water-in-oil (W/O) microemulsions has always been ignored in reverse micellar enzymology, mainly because cationic surfactants are inhibitors of enzyme peroxidase. In the present study, for the first time, we have successfully introduced the cationic W/O microemulsion as an attractive host for efficient HRP activity. To this notion, much improved activity of HRP was observed in the W/O microemulsion of cetyltrimethylammonium bromide (CTAB) with an increase in n-hexanol concentration and W0 ([water]/[surfactant]), presumably due to the increased interfacial area of the microemulsions. In support of our above observation, six surfactants were synthesized with an increased headgroup size where the methyl groups of CTAB were subsequently replaced by the n-propyl and 2-hydroxyethyl groups, respectively, to prepare mono-, di-, and tripropylated/hydroxyethylated n-hexadecylammonium bromide. The peroxidase activity enhanced with headgroup size and also followed an overall trend similar to that found in the case of CTAB. Possibly, the reduced positive charge density at the augmented interfacial area by means of increase, either in headgroup size, cosurfactant concentration, and/or W0, is not capable of inactivating HRP. Also, the larger space at the interface may facilitate easier solubilization of the enzyme and increase the local concentration of enzyme and substrate, leading to the higher activity of HRP. The best activity was obtained with surfactant N-hexadecyl-N,N,N-tripropylammonium bromide, the highest ever found in any cationic W/O microemulsions, being almost 3 times higher than that found in water. Strikingly, this observed highest activity is comparable with that observed in an anionic bis(2-ethylhexyl)sulfosuccinate sodium salt (AOT)-based system, the best W/O microemulsions used for HRP.
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Affiliation(s)
- Sangita Roy
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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96
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Importance of poly(ethylene oxide)-modification and chloride anion for the electron transfer reaction of cytochrome c in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.10.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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97
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Lu X, Hu J, Yao X, Wang Z, Li J. Composite System Based on Chitosan and Room-Temperature Ionic Liquid: Direct Electrochemistry and Electrocatalysis of Hemoglobin. Biomacromolecules 2006; 7:975-80. [PMID: 16529439 DOI: 10.1021/bm050933t] [Citation(s) in RCA: 271] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel polymer/room-temperature ionic liquid (RTIL) composite material based on chitosan (Chi) and 1-butyl-3-methyl-imidazolium tetrafluoroborate (BMIM.BF(4)) was explored. The composite system can be readily used as an immobilization matrix to entrap proteins and enzymes. Hemoglobin (Hb) was chosen as a model protein to investigate the composite system. A pair of well-defined quasireversible redox peaks of hemoglobin were obtained at the Chi-BMIM.BF(4)-Hb composite-film-modified glassy carbon (GC) electrode by direct electron transfer between the protein and the GC electrode. Dramatically enhanced biocatalytic activity was exemplified at the Chi-BMIM.BF(4)-Hb/GC electrode by the reduction of oxygen and trichloroacetic acid. Thermogravimetric analysis (TGA) suggests that the Chi-BMIM.BF(4)-Hb composite has higher thermal stability than Chi-Hb itself. The Chi-BMIM.BF(4)-Hb film was also characterized by UV-visible spectra, indicating excellent stability in solution and good biocompatibility for protein. The unique composite material based on polymer and ionic liquid can find wide potential applications in direct electrochemistry, biosensors, and biocatalysis.
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Affiliation(s)
- Xianbo Lu
- Department of Chemistry, Key Lab. of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
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98
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99
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Room-temperature ionic liquid cations act as short-chain surfactants and disintegrate a phospholipid bilayer. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2005.10.007] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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100
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Effect of the modification of phenothiazine-labeled poly(ethylene oxide) on the solubility and enzymatic electrocatalytic reaction of glucose oxidase in water/1-butyl-3-methylimidazolium tetrafluoroborate mixtures. Electrochem commun 2006. [DOI: 10.1016/j.elecom.2005.10.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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