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Abstract
Ionic liquids (IL) and hydrogen bonding (H-bonding) are two diverse fields for which there is a developing recognition of significant overlap. Doubly ionic H-bonds occur when a H-bond forms between a cation and anion, and are a key feature of ILs. Doubly ionic H-bonds represent a wide area of H-bonding which has yet to be fully recognised, characterised or explored. H-bonds in ILs (both protic and aprotic) are bifurcated and chelating, and unlike many molecular liquids a significant variety of distinct H-bonds are formed between different types and numbers of donor and acceptor sites within a given IL. Traditional more neutral H-bonds can also be formed in functionalised ILs, adding a further level of complexity. Ab initio computed parameters; association energies, partial charges, density descriptors as encompassed by the QTAIM methodology (ρBCP), qualitative molecular orbital theory and NBO analysis provide established and robust mechanisms for understanding and interpreting traditional neutral and ionic H-bonds. In this review the applicability and extension of these parameters to describe and quantify the doubly ionic H-bond has been explored. Estimating the H-bonding energy is difficult because at a fundamental level the H-bond and ionic interaction are coupled. The NBO and QTAIM methodologies, unlike the total energy, are local descriptors and therefore can be used to directly compare neutral, ionic and doubly ionic H-bonds. The charged nature of the ions influences the ionic characteristics of the H-bond and vice versa, in addition the close association of the ions leads to enhanced orbital overlap and covalent contributions. The charge on the ions raises the energy of the Ylp and lowers the energy of the X-H σ* NBOs resulting in greater charge transfer, strengthening the H-bond. Using this range of parameters and comparing doubly ionic H-bonds to more traditional neutral and ionic H-bonds it is clear that doubly ionic H-bonds cover the full range of weak through to very strong H-bonds.
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Affiliation(s)
- Patricia A Hunt
- Department of Chemistry, Faculty of Natural Sciences, Imperial College London, London, SW7 2AZ, UK.
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152
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Effects of multivalency and hydrophobicity of polyamines on enzyme hyperactivation of α-chymotrypsin. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.02.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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153
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Frauenkron-Machedjou VJ, Fulton A, Zhu L, Anker C, Bocola M, Jaeger KE, Schwaneberg U. Towards Understanding Directed Evolution: More than Half of All Amino Acid Positions Contribute to Ionic Liquid Resistance ofBacillus subtilisLipase A. Chembiochem 2015; 16:937-45. [DOI: 10.1002/cbic.201402682] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Indexed: 01/17/2023]
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154
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Li J, Wang P, Huang J, Sun J. Design and application of a novel ionic liquid with the property of strengthening coenzyme regeneration for whole-cell bioreduction in an ionic liquid-distilled water medium. BIORESOURCE TECHNOLOGY 2015; 175:42-50. [PMID: 25459802 DOI: 10.1016/j.biortech.2014.10.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/09/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
Focusing on the task-specific properties of ionic liquids (ILs), a novel IL was designed by combining the quaternary ammonium cationic surfactant, [N1,1,1,1](+), with benign amino acid anion ([Cys](-)), and was successfully employed in whole-cell-catalyzed bioreduction by Trichodermaasperellum ZJPH0810 using an ionic liquid-distilled water medium. As expected, based on better understanding about the effects of ILs' characteristics of cations and anions on T. asperellum ZJPH0810-catalyzed bioreduction and the optimization of reaction parameters, the developed tetramethylammonium cysteine ([N1,1,1,1][Cys])-containing system is more efficient for the asymmetric reduction of 3,5-bis(trifluoromethyl) acetophenone to (R)-[3,5-bis(trifluoromethyl)phenyl] ethanol by whole-cell catalysis in contrast to that in monophasic aqueous system. Herein, a new biotechnological application for designed type of ILs is proposed due to its novel property of strengthening coenzyme regeneration during the bioreduction process. The designed IL [N1,1,1,1][Cys] was also evaluated in Candidatropicalis 104-catalyzed bioreduction to board its application, with remarkable success.
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Affiliation(s)
- Jun Li
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Pu Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Jin Huang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jia Sun
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310032, China
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155
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156
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Zhang Y, Wang N, Xie ZB, Zhou LH, Yu XQ. Ionic liquid as a recyclable and efficient medium for lipase-catalyzed asymmetric cross aldol reaction. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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157
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Ni Z, Chen H, Lin X, Jin R. Insight into molecular mechanism underlying the transesterification catalysed by penicillin G amidase (PGA) using a combination protocol of experimental assay and theoretical analysis. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2013.850500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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158
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The effect of [bmim][Br] on the solubility of carbon dioxide and methane in glycols at pressures up to 14MPa and temperatures ranging from 303 to 423K. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.10.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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159
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Yang M, Wu H, Lian Y, Li X, Ren Y, Lai F, Zhao G. Using ionic liquids in whole-cell biocatalysis for the nucleoside acylation. Microb Cell Fact 2014; 13:143. [PMID: 25273324 PMCID: PMC4198771 DOI: 10.1186/s12934-014-0143-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 09/23/2014] [Indexed: 11/30/2022] Open
Abstract
Background The use of biocatalysts has become an increasingly attractive alternative to traditional chemical methods, due to the high selectivity, mild reaction conditions and environmentally-friendly processes in nonaqueous catalysis of nucleosids. However, the extensive use of organic solvents may generally suffer from sever drawbacks such as volatileness and toxicity to the environment and lower activity of the biocatalyst. Recently, ionic liquids are considered promising solvents for nonaqueous biocatalysis of polyhydroxyl compounds as ILs are environmental-friendly. Results In this research, we developed new IL-containing reaction systems for synthesis of long chain nucleoside ester catalyzed by Pseudomonas fluorescens whole-cells. Various ILs exerted significant but different effects on the bio-reaction. And their effects were closely related with both the anions and cations of the ILs. Use of 10% [BMI][PF6]/THF gave high reaction efficiency of arabinocytosine laurate synthesis, in which the initial rate, product yield and 5′-regioselectivity reached 2.34 mmol/L·h, 81.1% and >99%, respectively. Furthermore, SEM analysis revealed that ILs can alter the cell surface morphology, improve the permeability of cell envelopes and thus facilitate the mass transfer of substrates to the active sites of cell-bound enzymes. Conclusion Our research demonstrated the potential of ILs as promising reaction medium for achieving highly efficient and regioselective whole-cell catalysis.
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Affiliation(s)
- Meiyan Yang
- State Key lab of Pulp & Paper making Engineering, South China University of Technology, Guangzhou, 510641, China. .,College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Hui Wu
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Yan Lian
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Xiaofeng Li
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Yao Ren
- State Key lab of Pulp & Paper making Engineering, South China University of Technology, Guangzhou, 510641, China. .,College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Furao Lai
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
| | - Guanglei Zhao
- State Key lab of Pulp & Paper making Engineering, South China University of Technology, Guangzhou, 510641, China. .,College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510641, China.
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160
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Superactivity induced by micellar systems as the key for boosting the yield of enzymatic reactions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.06.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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161
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Hsu KI, Lien CW, Lin CH, Chang HT, Huang CC. Immobilization of iron hydroxide/oxide on reduced graphene oxide: peroxidase-like activity and selective detection of sulfide ions. RSC Adv 2014. [DOI: 10.1039/c4ra05047a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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162
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Attri P, Jha I, Choi EH, Venkatesu P. Variation in the structural changes of myoglobin in the presence of several protic ionic liquid. Int J Biol Macromol 2014; 69:114-23. [DOI: 10.1016/j.ijbiomac.2014.05.032] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/12/2014] [Accepted: 05/14/2014] [Indexed: 11/27/2022]
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163
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Improvement of enzymatic activity of β-glucosidase from Thermotoga maritima by 1-butyl-3-methylimidazolium acetate. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.02.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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164
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Improved activity of α-chymotrypsin in mixed micelles of cetyltrimethylammonium bromide (CTAB) and ionic liquids: A kinetic study resorting to sequential injection analysis. Colloids Surf B Biointerfaces 2014; 118:172-8. [DOI: 10.1016/j.colsurfb.2014.03.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 11/20/2013] [Accepted: 03/13/2014] [Indexed: 11/22/2022]
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165
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Takekiyo T, Fukudome K, Yamazaki K, Abe H, Yoshimura Y. Protein aggregation and partial globular state in aqueous 1-alkyl-3-methylimidazolium nitrate solutions. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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166
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Vacek J, Vrba J, Zatloukalová M, Kubala M. Electrochemical oxidation of proteins using ionic liquids as solubilizers, adsorption solvents and electrolytes. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.06.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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167
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Improving the catalytic performance of porcine pancreatic lipase in the presence of [MMIm][MeSO4] with the modification of functional ionic liquids. Process Biochem 2014. [DOI: 10.1016/j.procbio.2014.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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168
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Ionic liquids as reaction media for oxidative folding and native chemical ligation of cysteine-containing peptides. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.08.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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169
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Richardt A, Mrestani-Klaus C, Bordusa F. Impact of ionic liquids on the structure of peptides proved by HR-MAS NMR spectroscopy. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.12.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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170
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Mogharabi M, Faramarzi MA. Laccase and Laccase-Mediated Systems in the Synthesis of Organic Compounds. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300960] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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171
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Egorova KS, Ananikov VP. Toxicity of ionic liquids: eco(cyto)activity as complicated, but unavoidable parameter for task-specific optimization. CHEMSUSCHEM 2014; 7:336-60. [PMID: 24399804 DOI: 10.1002/cssc.201300459] [Citation(s) in RCA: 256] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Revised: 07/22/2013] [Indexed: 05/19/2023]
Abstract
Rapid progress in the field of ionic liquids in recent decades led to the development of many outstanding energy-conversion processes, catalytic systems, synthetic procedures, and important practical applications. Task-specific optimization emerged as a sharpening stone for the fine-tuning of structure of ionic liquids, which resulted in unprecedented efficiency at the molecular level. Ionic-liquid systems showed promising opportunities in the development of green and sustainable technologies; however, the chemical nature of ionic liquids is not intrinsically green. Many ionic liquids were found to be toxic or even highly toxic towards cells and living organisms. In this Review, we show that biological activity and cytotoxicity of ionic liquids dramatically depend on the nature of a biological system. An ionic liquid may be not toxic for particular cells or organisms, but may demonstrate high toxicity towards another target present in the environment. Thus, a careful selection of biological activity data is a must for the correct assessment of chemical technologies involving ionic liquids. In addition to the direct biological activity (immediate response), several indirect effects and aftereffects are of primary importance. The following principal factors were revealed to modulate toxicity of ionic liquids: i) length of an alkyl chain in the cation; ii) degree of functionalization in the side chain of the cation; iii) anion nature; iv) cation nature; and v) mutual influence of anion and cation.
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Affiliation(s)
- Ksenia S Egorova
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991 (Russia)
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172
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Tomlinson SR, Kehr CW, Lopez MS, Schlup JR, Anthony JL. Solubility of the Corn Protein Zein in Imidazolium-based Ionic Liquids. Ind Eng Chem Res 2014. [DOI: 10.1021/ie403659x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sean R. Tomlinson
- Department of Chemical Engineering, Kansas State University, 1005
Durland Hall, Manhattan, Kansas 66506, United States
| | - Christian W. Kehr
- Department of Chemical Engineering, Kansas State University, 1005
Durland Hall, Manhattan, Kansas 66506, United States
| | - Mayra S. Lopez
- Department of Chemical Engineering, Kansas State University, 1005
Durland Hall, Manhattan, Kansas 66506, United States
| | - John R. Schlup
- Department of Chemical Engineering, Kansas State University, 1005
Durland Hall, Manhattan, Kansas 66506, United States
| | - Jennifer L. Anthony
- Department of Chemical Engineering, Kansas State University, 1005
Durland Hall, Manhattan, Kansas 66506, United States
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173
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Schwenzer B, Kerisit SN, Vijayakumar M. Anion pairs in room temperature ionic liquids predicted by molecular dynamics simulation, verified by spectroscopic characterization. RSC Adv 2014. [DOI: 10.1039/c3ra46069j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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174
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Fiebig OC, Mancini E, Caputo G, Vaden TD. Quantitative evaluation of myoglobin unfolding in the presence of guanidinium hydrochloride and ionic liquids in solution. J Phys Chem B 2013; 118:406-12. [PMID: 24354463 DOI: 10.1021/jp408061k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The use of ionic liquids in biochemical and biophysical applications has increased dramatically in recent years due to their interesting properties. We report results of a thermodynamic characterization of the chaotrope-induced denaturation of equine myoglobin in two different ionic liquid aqueous environments using a combined absorption/fluorescence spectroscopic approach. Denaturation by guanidinium hydrochloride was monitored by loss of heme absorptivity and limited unfolding structural information was obtained from Förster resonance energy transfer experiments. Results show that myoglobin unfolding is generally unchanged in the presence of ethylmethylimidazolium acetate (EMIAc) in aqueous solution up to 150 mM concentration but is facilitated by butylmethylimidazolium boron tetrafluoride (BMIBF4) in solution. The presence of 150 mM BMIBF4 alone does not induce unfolding but destabilizes the structure as observed by a decrease in threshold denaturant concentration for unfolding and an 80% decrease in the magnitude of ΔGunfolding from 44 kJ/mol in the absence of BMIBF4 to 8 kJ/mol in the presence of 150 mM BMIBF4. Thus, the BMIBF4 significantly destabilizes the myoglobin structure while the EMIAc does not, likely due to differences in anion interaction capabilities. This is confirmed with control studies using NaAc and LiBF4 solutions. EMIAc may be chosen as cosolvent additive with minimal effects on protein structure while BMIBF4 may be used as a supplement in protein folding experiments, potentially allowing access to proteins which have been traditionally difficult to denature as well as designing ionic liquids to match protein characteristics.
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Affiliation(s)
- Olivia C Fiebig
- Department of Chemistry and Biochemistry and ‡School of Biomedical Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
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175
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Pabbathi A, Ghosh S, Samanta A. FCS Study of the Structural Stability of Lysozyme in the Presence of Morpholinium Salts. J Phys Chem B 2013; 117:16587-93. [DOI: 10.1021/jp409842d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ashok Pabbathi
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Shalini Ghosh
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Anunay Samanta
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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176
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Modulating enzyme activity using ionic liquids or surfactants. Appl Microbiol Biotechnol 2013; 98:545-54. [DOI: 10.1007/s00253-013-5395-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/07/2013] [Accepted: 11/09/2013] [Indexed: 10/26/2022]
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177
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Tietze AA, Bordusa F, Giernoth R, Imhof D, Lenzer T, Maaß A, Mrestani-Klaus C, Neundorf I, Oum K, Reith D, Stark A. On the Nature of Interactions between Ionic Liquids and Small Amino-Acid-Based Biomolecules. Chemphyschem 2013; 14:4044-64. [DOI: 10.1002/cphc.201300736] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Revised: 09/03/2013] [Indexed: 01/18/2023]
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178
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Ali A, Ali M, Malik NA, Uzair S. Unusual solvatochromic absorbance probe behaviour within mixtures of poly(ethylene glycol)-400+ionic liquid, [bmim][Tf2N]. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:363-371. [PMID: 24280298 DOI: 10.1016/j.saa.2013.10.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/24/2013] [Accepted: 10/31/2013] [Indexed: 06/02/2023]
Abstract
The potentially green solvents made up of ionic liquids (ILs) and poly(ethylene glycols) may have wide range of the applications in many chemical and biochemical fields. In the present work, solvatochromic absorbance probe behaviour is used to assess the physicochemical properties of the mixtures composed of PEG-400+IL, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [bmim][Tf2N]. Lowest energy intramolecular charge-transfer absorbance maxima of a betaine dye, i.e., E(T)(N), indicates the dipolarity/polarizability and/or hydrogen-bond donating (HBD) acidity of the [bmim][Tf2N]+PEG-400 mixtures to be even higher than that of neat [bmim][Tf2N], the solution component with higher dipolarity/polarizability and/or HBD acidity. Dipolarity/polarizability (π(∗)) obtained separately from the electronic absorbance response of probe N,N-diethyl-4-nitroaniline, and the HBD acidity (α) of PEG-400+[bmim][Tf2N] mixtures are also observed to be anomalously high. A comparative study of the PEG+IL mixtures has also been done with PEG-400+molecular organic solvents (protic polar [methanol], aprotic polar [N,N-dimethylformamide], and non polar, [benzene]) mixtures, but these mixtures do not show this type of unusual behaviour. A four-parameter simplified combined nearly ideal binary solvent/Redlich-Kister (CNIBS/R-K) equation is shown to satisfactorily predict the solvatochromic parameters within PEG-400+different solvent mixtures.
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Affiliation(s)
- Anwar Ali
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India.
| | - Maroof Ali
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
| | - Nisar Ahmad Malik
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
| | - Sahar Uzair
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
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179
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Molecular cloning of a thermo-alkaliphilic lipase from Bacillus subtilis DR8806: Expression and biochemical characterization. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.08.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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180
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Shao Q. On the influence of hydrated imidazolium-based ionic liquid on protein structure stability: A molecular dynamics simulation study. J Chem Phys 2013; 139:115102. [DOI: 10.1063/1.4821588] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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181
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Machado MF, Queirós RP, Santos MD, Fidalgo LG, Delgadillo I, Saraiva JA. Effect of ionic liquids alkyl chain length on horseradish peroxidase thermal inactivation kinetics and activity recovery after inactivation. World J Microbiol Biotechnol 2013; 30:487-94. [DOI: 10.1007/s11274-013-1466-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 08/16/2013] [Indexed: 10/26/2022]
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182
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Jia R, Hu Y, Liu L, Jiang L, Zou B, Huang H. Enhancing Catalytic Performance of Porcine Pancreatic Lipase by Covalent Modification Using Functional Ionic Liquids. ACS Catal 2013. [DOI: 10.1021/cs400404f] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ru Jia
- State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Biotechnology and Pharmaceutical
Engineering, Nanjing University of Technology, Nanjing 210009, China
| | - Yi Hu
- State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Biotechnology and Pharmaceutical
Engineering, Nanjing University of Technology, Nanjing 210009, China
| | - Luo Liu
- Beijing Key Laboratory of Bioprocess,
College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ling Jiang
- State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Biotechnology and Pharmaceutical
Engineering, Nanjing University of Technology, Nanjing 210009, China
| | - Bin Zou
- State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Biotechnology and Pharmaceutical
Engineering, Nanjing University of Technology, Nanjing 210009, China
| | - He Huang
- State Key Laboratory of Materials-Oriented
Chemical Engineering, College of Biotechnology and Pharmaceutical
Engineering, Nanjing University of Technology, Nanjing 210009, China
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183
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Chen T, Xiong H, Wen W, Zhang X, Wang S. Electrochemistry of heme proteins entrapped in DNA films in two imidazolium-based room temperature ionic liquids. Bioelectrochemistry 2013; 91:8-14. [DOI: 10.1016/j.bioelechem.2012.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 09/20/2012] [Accepted: 11/25/2012] [Indexed: 11/27/2022]
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184
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Chen ZG, Zhang DN, Han YB. Lipase-catalyzed acylation of lily polysaccharide in ionic liquid-containing systems. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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185
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Yu X, Zou F, Li Y, Lu L, Huang X, Qu Y. Effect of three trifluoromethanesulfonate ionic liquids on the activity, stability and conformation of laccase. Int J Biol Macromol 2013; 56:62-8. [PMID: 23403026 DOI: 10.1016/j.ijbiomac.2013.02.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 01/31/2013] [Accepted: 02/01/2013] [Indexed: 11/26/2022]
Abstract
The activity, stability and conformation of laccase were first investigated in an aqueous solution of ionic liquids 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([Bmim]TfO), 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate ([Bmpyr]TfO) or tetramethylammonium trifluoromethanesulfonate ([TMA]TfO). Compared with control system, high level of [Bmim]TfO or [Bmpyr]TfO destabilizes laccase while [TMA]TfO stabilizes laccase. These effects are more pronounced with the extension of the incubation time. The activity variations are well correlated with the changes of the conformation of laccase evidenced by fluorescence and circular dichroism spectra under specified conditions. The effects of the three ionic liquids on laccase are associated with the chaotropicity of the cations in Hofmeister series. For laccase, [TMA]TfO is not a good activating agent but it greatly enhances the stability of laccase in addition to maintaining the catalytic efficiency of laccase, showing its great potential in real application.
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Affiliation(s)
- Xinxin Yu
- Key Laboratory of Colloid & Interface Chemistry of the Education Ministry of China, Shandong University, Jinan 250100, PR China
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