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Rashad RT, Nasef HA, Gomaa EA, AbouElleef EM. Conductometric investigation of nano MnSO 4 association parameters and complex formation with glycylglycine in aqueous and methanol-water mixtures: Thermodynamic parameters and potential applications. Int J Biol Macromol 2024; 267:131648. [PMID: 38631565 DOI: 10.1016/j.ijbiomac.2024.131648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 04/13/2024] [Accepted: 04/14/2024] [Indexed: 04/19/2024]
Abstract
This study aimed to investigate the ion pair association values and association parameters of nano MnSO4 in water and methanol-water mixtures (20 % and 40 % methanol by mass percentage) at varying temperatures (298.15, 303.15, 308.15, and 313.15 K) using the conductometric technique. Additionally, the parameters for complex formation between nano MnSO4 and glycylglycine as a ligand were determined. The focus was on elucidating the thermodynamic formation parameters for the nano Mn2+-glycylglycine interaction, with particular emphasis on comparing the 1: 1 and 1: 2 (M: L) complexes to understand the complexation behavior more comprehensively. The results indicated that the complexation process was spontaneous, as evidenced by negative ΔGf (formation free energy change) values, which increased with temperature, highlighting the enhanced spontaneity of the process. The findings provide valuable insights into designing new materials and procedures by enhancing our understanding of the complexation behavior of nano MnSO4 with ligands like glycylglycine, thus contributing to advancements in various applications such as chemical synthesis, medicines, and environmental remediation. By elucidating the thermodynamic aspects of these interactions, the study aimed to provide valuable information that could be utilized in practical applications and further research endeavors.
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Affiliation(s)
- Radwa T Rashad
- Department of Basic Science, Misr Higher Institute for Engineering and Technology, Mansoura, Egypt.
| | - Hany A Nasef
- Basic Sciences Department, Delta Higher Institute for Engineering and Technology, 35681 Dakhlia, Mansoura, Egypt.
| | - Esam A Gomaa
- Chemistry Department, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt.
| | - Elsayed M AbouElleef
- Basic Sciences Department, Delta Higher Institute for Engineering and Technology, 35681 Dakhlia, Mansoura, Egypt.
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2
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Alayyafi AA, Nasef HA, Salem SE, Gomaa EA, AbouElleef EM. Effect of indomethacin on the electrical conductance and electrochemical voltammetry of copper chloride in methanol, ethanol, and their binary mixture with water. Heliyon 2024; 10:e24071. [PMID: 38293497 PMCID: PMC10825436 DOI: 10.1016/j.heliyon.2024.e24071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/19/2023] [Accepted: 01/03/2024] [Indexed: 02/01/2024] Open
Abstract
This study investigated the physicochemical properties of the interaction of indomethacin and copper chloride using the electrical conductance measurement in methanol, ethanol, and their binary mixture with water at room temperature (298.15 K), to determine the solvation behavior, redox behavior, and kinetics. The association parameters were computed using the Fuoss-Hsia-Fernández-Prini and Fuoss-Shedlovsky models. The standard Gibbs energy for association (ΔGoA), Walden product (Λoηo), and hydrodynamic radii (RH) were calculated to study the interaction of indomethacin and copper chloride. On the other hand, cyclic voltammetry examines the electrochemical redox behavior of copper chloride using a gold electrode and its interactions with indomethacin. Results showed changes in peak potentials and currents density in the presence of indomethacin, indicating alterations in redox behavior and reaction rates. Overall, this research can be valuable in understanding the electrochemical properties and potential applications of indomethacin and copper chloride, as well as in developing new drugs or therapeutic agents, which could have has implications in various fields, including drug development, electrochemistry, and materials science.
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Affiliation(s)
- AbdulAziz A. Alayyafi
- Chemistry Department, Al-Qunfudhah University College, Umm Al-Qura University, Saudi Arabia
| | - Hany A. Nasef
- Basic Sciences Department, Delta Higher Institute for Engineering and Technology, 35681-Dakhlia, Mansoura, Egypt
| | - Shereen E. Salem
- Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
| | - Esam A. Gomaa
- Chemistry Department, Faculty of Science, Mansoura University, 35516-Mansoura, Egypt
| | - Elsayed M. AbouElleef
- Basic Sciences Department, Delta Higher Institute for Engineering and Technology, 35681-Dakhlia, Mansoura, Egypt
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3
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Mahapatra A, Chowdhury UD, Barik S, Parida S, Bhargava BL, Sarkar M. Deciphering the Role of Anions of Ionic Liquids in Modulating the Structure and Stability of ct-DNA in Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17318-17332. [PMID: 37995326 DOI: 10.1021/acs.langmuir.3c02459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Stabilizing biomolecules under ambient conditions can be extremely beneficial for various biological applications. In this context, the utilization of ionic liquids (ILs) in enhancing the stability and preservation of nucleic acids in aqueous solutions is found to be promising. While the role of the cationic moiety of ILs in the said event has been thoroughly explored, the importance of the anionic moiety in ILs, if any, is rather poorly understood. Herein, we examine the function of anions of ILs in nucleic acid stabilization by examining the stability and structure of calf thymus-DNA (ct-DNA) in the presence of various ILs composed of a common 1-ethyl-3-methylimidazolium cations (Emim+) and different anions, which includes Cl-, Br-, NO 3 - , Ac - , HS O 4 - and B F 4 - by employing various spectroscopic techniques as well as Molecular Dynamics (MD) simulation studies. Analysis of our data suggests that the chemical nature of anions including polarity, basicity, and hydrophilicity become an important factor in the overall DNA-IL interaction event. At lower concentrations, the interplay of intermolecular interaction between the IL anions with their respective cations and the solvent molecules becomes a very crucial factor in inducing their stabilizing effect on ct-DNA. However, at higher concentrations of ILs, the ct-DNA stabilization is additionally governed by specific-ion effect. MD simulation studies have also provided valuable insights into molecular-level understanding of the DNA-IL interaction event. Overall, the present study clearly demonstrated that along with the cationic moiety of ILs, the anions of ILs can play a significant role in deciding the stability of duplex DNA in aqueous solution. The findings of this study are expected to enhance our knowledge on understanding of IL-DNA interactions in a better manner and will be helpful in designing optimized IL systems for nucleic acid based applications.
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Affiliation(s)
- Amita Mahapatra
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
| | - Unmesh Dutta Chowdhury
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
| | - Sahadev Barik
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
| | - Subhakanta Parida
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
| | - B L Bhargava
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Jatani, Khurda, Bhubaneswar 752050, Odisha, India
- An OCC of Homi Bhabha National Institute (HBNI), Mumbai 400094, India
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4
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Ionic liquids as protein stabilizers for biological and biomedical applications: A review. Biotechnol Adv 2022; 61:108055. [DOI: 10.1016/j.biotechadv.2022.108055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 10/13/2022] [Accepted: 10/23/2022] [Indexed: 11/22/2022]
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5
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Garg M, Sharma D, Kumar R. Analysis of the effect of 1-Allyl-3-Methylimidazolium chloride on thermodynamic stability, folding kinetics, and motional dynamics of horse cytochrome c. Biophys Chem 2022; 290:106892. [PMID: 36115294 DOI: 10.1016/j.bpc.2022.106892] [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: 06/25/2022] [Revised: 09/03/2022] [Accepted: 09/04/2022] [Indexed: 11/02/2022]
Abstract
1-allyl-3-methylimidazolium chloride (AMIMCl) acts as a potential green solvent for proteins. The present work provides a possible pathway by which the structural, kinetic, thermodynamic, and folding properties of horse cytochrome c (cyt c) are affected in green aqueous-AMIMCl systems. Analysis of the effect of AMIMCl on thermodynamic stability, refolding/unfolding kinetics, and motional dynamics of cyt c provided important information, (i) AMIMCl decreases the thermodynamic stability of reduced cyt c and also strengthens the guanidinium chloride (GdmCl)-mediated decrease in thermodynamic stability of protein, (ii) AMIMCl reduces the thermal-fluctuation of Met80-containing omega-loop of natively-folded compact state of carbonmonoxycytochrome c (MCO-state) due to polyfunctional interactions between the AMIM+ and different groups of protein, (iii) AMIMCl shifts the kinetic chevron plot, ln kobs[GdmCl] to the lower concentration of GdmCl, (iv) AMIMCl shifts the refolding and unfolding limps to vertically downwards and upwards, respectively, and (v) AMIMCl reducing the unfolding free energy estimated by both thermodynamic and kinetic analysis.
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Affiliation(s)
- Mansi Garg
- Department of Chemistry, Central University of Punjab, Bathinda 151001, India
| | - Deepak Sharma
- Council of Scientific and Industrial Research- Institute of Microbial Technology, Sector 39A, Chandigarh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Rajesh Kumar
- Department of Chemistry, Central University of Punjab, Bathinda 151001, India.
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6
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Guncheva M. Role of ionic liquids on stabilization of therapeutic proteins and model proteins. Protein J 2022; 41:369-380. [PMID: 35661292 DOI: 10.1007/s10930-022-10058-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2022] [Indexed: 11/26/2022]
Abstract
Ionic liquids (ILs) exhibit potential as excipients to stabilize proteins in solutions. This mini-review is not a detailed reference book on ILs, rather a brief overview of the main achievements published in the literature on their effect on protein aggregation, unfolding, structural and thermal stability, and activity. The main focus of the manuscript is three widely studied groups of ionic liquids: imidazolium-, cholinium- and alkylammonium-based and their effect on the model and therapeutic proteins.
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Affiliation(s)
- Maya Guncheva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. 9, 1113, Sofia, Bulgaria.
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7
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Madadi Mahani N, Mostaghni F, Shafiekhani H. Cuspareine as alkaloid against COVID-19 designed with ionic liquids: DFT and docking molecular approaches. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 231:112447. [PMID: 35483276 PMCID: PMC9020645 DOI: 10.1016/j.jphotobiol.2022.112447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 04/08/2022] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
Cuspareine as an antiviral alkaloid can be used in the treatment of COVID-19. In this study, we introduced the ionic liquids (ILs) concluded cuspareinium as a cation with CH3COO-, CF3COO-, and PF6 as anions. The optimized geometry, thermodynamic parameters, and reactivity descriptors were calculated with density functional theory (DFT) approach and time-dependent density functional theory (TD-DFT) using B3LYP/6-311G. In addition, the UV and IR spectra of the introduced ILs were investigated. Based on DFT calculation, the designed IL CH3COO- can be to the most suitable anions due to most solubility in the water. DFT studies displayed that all the introduced ILs have more polarity than pristine cuspareine and CH3COO--cuspareine is the most polarity due to high dipole moment. Also, the thermo- chemical data of the designed ionic liquids revealed that PF6-cuspareine is distinguished to be stable. A molecular docking study of the designed ILs with 6 LU7 protease was performed to display interactions and binding energy. Results of molecular docking displayed that CH3COO- ion liquid has the highest binding energy (- 7.20 kcal/mol) and Ala7, and Lys 5 residues are involved in an interaction. DFT and molecular docking studies of cuspareine as alkaloid based on ionic liquids can be helpful to for more pharmaceutical and biological researches of cuspareine as an antiviral agent against COVID-19.
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Affiliation(s)
| | - Fatemeh Mostaghni
- Department of Chemistry, Payame Noor University, 19395-4697 Tehran, Iran
| | - Homa Shafiekhani
- Department of Chemistry, Payame Noor University, 19395-4697 Tehran, Iran
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8
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Kushwaha P, Prabhu NP. Imidazolium-based ionic liquids with increasing alkyl chain length of cations decrease the stability and fibrillation propensity of lysozyme. NEW J CHEM 2022. [DOI: 10.1039/d2nj00559j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imidazolium ionic liquids with longer alkyl side chains show a larger destabilization effect on lysozyme. Increased hydrophobicity of the IL increases its binding affinity and inhibits the fibril formation of lysozyme.
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Affiliation(s)
- Pratibha Kushwaha
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad – 500 046, India
| | - N. Prakash Prabhu
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad – 500 046, India
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9
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Peng L, Dai H, Wang H, Zhu H, Ma L, Yu Y, Fu Y, Feng X, Du J, Zhang Y. Effect of different dehydration methods on the properties of gelatin films. Food Chem 2021; 374:131814. [PMID: 34915373 DOI: 10.1016/j.foodchem.2021.131814] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 10/24/2021] [Accepted: 12/05/2021] [Indexed: 12/11/2022]
Abstract
The properties of gelatin film fabricated by ethanol precipitation effect dehydration, Hofmeister effect dehydration and hot air drying dehydration were investigated. The results revealed that the mechanical properties were significantly improved by ethanol precipitation and Hofmeister effect. The tensile strength and elongation at break of the film prepared by ethanol precipitation were increased by 83.28% (20% gelatin concentration) and 122.42% (5% gelatin concentration) respectively compared with that of hot air-dried gelatin film. The water contact angle was increased and water solubility was reduced by ethanol precipitation, which could attribute to the formation of compact structure, more triple helix content, and non-covalent interactions. However, the water contact angle of Hofmeister effect fabricated films was decreased compared with that of hot air drying owing to the adhesion of ammonium sulfate. Moreover, ethanol precipitation effect improved the color difference and opacity due to the ethanol decolorization effect.
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Affiliation(s)
- Lin Peng
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Hongjie Dai
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Hongxia Wang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Hankun Zhu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Liang Ma
- College of Food Science, Southwest University, Chongqing 400715, China; Biological Science Research Center, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, Chongqing 400715, China
| | - Yong Yu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Yu Fu
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Xin Feng
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Jie Du
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Yuhao Zhang
- College of Food Science, Southwest University, Chongqing 400715, China; Biological Science Research Center, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, Chongqing 400715, China.
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10
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Shobhna, Kumari M, Kashyap HK. Mechanistic Insight on BioIL-Induced Structural Alterations in DMPC Lipid Bilayer. J Phys Chem B 2021; 125:11955-11966. [PMID: 34672578 DOI: 10.1021/acs.jpcb.1c06218] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The emerging application risks of traditional ionic liquids (ILs) toward the ecosystem have changed the perception regarding their greenness. This resulted in the exploration of their more biocompatible alternatives known as biocompatible ILs (BioILs). Here, we have investigated the impact of two such biocompatible cholinium amino acid-based ILs on the structural behavior of model homogeneous DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) lipid bilayer using all-atom molecular dynamics simulation technique. Two classic cholinium-amino acid-based ILs, cholinium glycinate ([Ch][Gly]) and cholinium phenylalaninate ([Ch][Phe]), which differ only by the side chain lengths and hydrophobicity of the anions, have been utilized in the present work. Simultaneous analysis of the bilayer structural properties reveals that the existence of [Ch][Gly] BioIL above a particular concentration induces phase transition from fluid phase to gel phase in the DMPC lipid bilayer. Such a freezing of lipid bilayer upon the exposure to concentrated aqueous solution of [Ch][Gly] BioIL indicates the harmfulness of this BioIL toward the cell membranes majorly containing DMPC lipids, as the cell freezing can negatively affect its stability and functionality. Despite having a more hydrophobic amino acid side chain of [Phe]- anion in [Ch][Phe], in the case of bilayer-[Ch][Phe] systems we observe the minimal impact of [Ch][Phe] BioIL on the DMPC bilayer properties up to 10 mol % concentration. In the presence of these BioIL, we observe the thickening of the bilayer and accumulation of the cations and anions of the BioILs at the interface of DMPC lipid heads and tails. The transfer free-energy profile of a [Phe]- anion from aqueous phase to membrane center also indicates the anion partitioning at lipid head-tail interface and its inability to penetrate in the lipid membrane tail region. In contrast, the free-energy profile for a [Gly]- anion offers a very high energy barrier to the insertion of [Gly]- into the membrane interior, leading to accumulation of [Gly]- anions at the lipid head-water region.
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Affiliation(s)
- Shobhna
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Monika Kumari
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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11
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Preparation and characterization of gelatin films by transglutaminase cross-linking combined with ethanol precipitation or Hofmeister effect. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106421] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Patel AY, Jonnalagadda KS, Paradis N, Vaden TD, Wu C, Caputo GA. Effects of Ionic Liquids on Metalloproteins. Molecules 2021; 26:514. [PMID: 33478102 PMCID: PMC7835893 DOI: 10.3390/molecules26020514] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/04/2021] [Accepted: 01/08/2021] [Indexed: 01/28/2023] Open
Abstract
In the past decade, innovative protein therapies and bio-similar industries have grown rapidly. Additionally, ionic liquids (ILs) have been an area of great interest and rapid development in industrial processes over a similar timeline. Therefore, there is a pressing need to understand the structure and function of proteins in novel environments with ILs. Understanding the short-term and long-term stability of protein molecules in IL formulations will be key to using ILs for protein technologies. Similarly, ILs have been investigated as part of therapeutic delivery systems and implicated in numerous studies in which ILs impact the activity and/or stability of protein molecules. Notably, many of the proteins used in industrial applications are involved in redox chemistry, and thus often contain metal ions or metal-associated cofactors. In this review article, we focus on the current understanding of protein structure-function relationship in the presence of ILs, specifically focusing on the effect of ILs on metal containing proteins.
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Affiliation(s)
- Aashka Y. Patel
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | | | - Nicholas Paradis
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Timothy D. Vaden
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Chun Wu
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
| | - Gregory A. Caputo
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
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13
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Effect of imidazolium based ionic liquids on CO-association dynamics and thermodynamic stability of Ferrocytochrome c. Biophys Chem 2020; 268:106497. [PMID: 33212391 DOI: 10.1016/j.bpc.2020.106497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/01/2020] [Accepted: 11/01/2020] [Indexed: 11/20/2022]
Abstract
Analysis of kinetic and thermodynamic parameters measured for CO-association reaction of Ferrocytochrome c (Ferrocyt c) under variable concentrations of 1-butyl-3-methylimidazolium with varying anion ([Bmim]X) (X = Cl-, I-, Br-, HSO4-) at pH 7 revealed that the low concentration of [Bmim]X (≤0.5 M) constrains the CO-association dynamics of Ferrocyt c and typically follows the order: [Bmim]HSO4 > [Bmim]Cl > [Bmim]Br > [Bmim]I. At relatively higher concentrations (>0.5), the chaotropic action of [Bmim]+ dominates which consequently increases the thermal-fluctuations responsible to denature the protein and thus accelerates the speed of CO-association reaction. Analysis of thermal denaturation curves of Ferrocyt c measured at different concentrations of [Bmim]X revealed that the [Bmim]X decreases the thermodynamic stability of protein and typically follows the order: [Bmim]I > [Bmim]Br > [Bmim]Cl > [Bmim]CH3COO > [Bmim]HSO4, demonstrating that the effect of [Bmim]X on thermodynamic stability of protein is not in accordance to Hofmeister series effect of anions because instead of increasing the kosmotropic anion carrying [Bmim]X ([Bmim]CH3COO and [Bmim]HSO4) also decreases the thermodynamic stability of protein.
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14
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Kumari P, Pillai VVS, Benedetto A. Mechanisms of action of ionic liquids on living cells: the state of the art. Biophys Rev 2020; 12:1187-1215. [PMID: 32936423 PMCID: PMC7575683 DOI: 10.1007/s12551-020-00754-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/03/2020] [Indexed: 12/13/2022] Open
Abstract
Ionic liquids (ILs) are a relatively new class of organic electrolytes composed of an organic cation and either an organic or inorganic anion, whose melting temperature falls around room-temperature. In the last 20 years, the toxicity of ILs towards cells and micro-organisms has been heavily investigated with the main aim to assess the risks associated with their potential use in (industrial) applications, and to develop strategies to design greener ILs. Toxicity, however, is synonym with affinity, and this has stimulated, in turn, a series of biophysical and chemical-physical investigations as well as few biochemical studies focused on the mechanisms of action (MoAs) of ILs, key step in the development of applications in bio-nanomedicine and bio-nanotechnology. This review has the intent to present an overview of the state of the art of the MoAs of ILs, which have been the focus of a limited number of studies but still sufficient enough to provide a first glimpse on the subject. The overall picture that emerges is quite intriguing and shows that ILs interact with cells in a variety of different mechanisms, including alteration of lipid distribution and cell membrane viscoelasticity, disruption of cell and nuclear membranes, mitochondrial permeabilization and dysfunction, generation of reactive oxygen species, chloroplast damage (in plants), alteration of transmembrane and cytoplasmatic proteins/enzyme functions, alteration of signaling pathways, and DNA fragmentation. Together with our earlier review work on the biophysics and chemical-physics of IL-cell membrane interactions (Biophys. Rev. 9:309, 2017), we hope that the present review, focused instead on the biochemical aspects, will stimulate a series of new investigations and discoveries in the still new and interdisciplinary field of "ILs, biomolecules, and cells."
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Affiliation(s)
- Pallavi Kumari
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy
- School of Physics, University College Dublin, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - Visakh V S Pillai
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy
- School of Physics, University College Dublin, Dublin 4, Ireland
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - Antonio Benedetto
- Department of Sciences, University of Roma Tre, 00146, Rome, Italy.
- School of Physics, University College Dublin, Dublin 4, Ireland.
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland.
- Laboratory for Neutron Scattering, Paul Scherrer Institute, 5232, Villigen, Switzerland.
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15
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Level G, Zhang J, Brown J, Hammond O, Hannigan B, Stella L, Nockemann P, Blesic M. Multicharge zwitterionic molecules: Hydration, kosmotropicity and anti-fouling potential. J Colloid Interface Sci 2020; 562:391-399. [DOI: 10.1016/j.jcis.2019.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/01/2019] [Accepted: 12/02/2019] [Indexed: 10/25/2022]
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Susceptibility of biomembrane structure towards amphiphiles, ionic liquids, and deep eutectic solvents. ADVANCES IN BIOMEMBRANES AND LIPID SELF-ASSEMBLY 2020. [DOI: 10.1016/bs.abl.2020.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Kumar PK, Jha I, Sindhu A, Venkatesu P, Bahadur I, Ebenso EE. Experimental and molecular docking studies in understanding the biomolecular interactions between stem bromelain and imidazolium-based ionic liquids. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111785] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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18
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Otero-Mato JM, Lesch V, Montes-Campos H, Smiatek J, Diddens D, Cabeza O, Gallego LJ, Varela LM. Solvation in ionic liquid-water mixtures: A computational study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111273] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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19
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Acharyya A, DiGiuseppi D, Stinger BL, Schweitzer-Stenner R, Vaden TD. Structural Destabilization of Azurin by Imidazolium Chloride Ionic Liquids in Aqueous Solution. J Phys Chem B 2019; 123:6933-6945. [DOI: 10.1021/acs.jpcb.9b04113] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Arusha Acharyya
- Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, Pennsylvania 19104, United States
| | - David DiGiuseppi
- Department of Chemistry, Drexel University, 32 S. 32nd Street, Philadelphia, Pennsylvania 19104, United States
| | - Brittany L. Stinger
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Reinhard Schweitzer-Stenner
- Department of Chemistry, Drexel University, 32 S. 32nd Street, Philadelphia, Pennsylvania 19104, United States
| | - Timothy D. Vaden
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
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20
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Insights into the effect of imidazolium-based ionic liquids on chemical structure and hydrolytic activity of microbial lipase. Bioprocess Biosyst Eng 2019; 42:1235-1246. [DOI: 10.1007/s00449-019-02121-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/03/2019] [Indexed: 01/04/2023]
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21
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Kohn EM, Lee JY, Calabro A, Vaden TD, Caputo GA. Heme Dissociation from Myoglobin in the Presence of the Zwitterionic Detergent N, N-Dimethyl- N-Dodecylglycine Betaine: Effects of Ionic Liquids. Biomolecules 2018; 8:biom8040126. [PMID: 30380655 PMCID: PMC6315634 DOI: 10.3390/biom8040126] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 01/24/2023] Open
Abstract
We have investigated myoglobin protein denaturation using the zwitterionic detergent Empigen BB (EBB, N,N-Dimethyl-N-dodecylglycine betaine). A combination of absorbance, fluorescence, and circular dichroism spectroscopic measurements elucidated the protein denaturation and heme dissociation from myoglobin. The results indicated that Empigen BB was not able to fully denature the myoglobin structure, but apparently can induce the dissociation of the heme group from the protein. This provides a way to estimate the heme binding free energy, ΔGdissociation. As ionic liquids (ILs) have been shown to perturb the myoglobin protein, we have investigated the effects of the ILs 1-butyl-3-methylimidazolium chloride (BMICl), 1-ethyl-3-methylimidazolium acetate (EMIAc), and 1-butyl-3-methylimidazolium tetrafluoroborate (BMIBF4) in aqueous solution on the ΔGdissociation values. Absorbance experiments show the ILs had minimal effect on ΔGdissociation values when compared to controls. Fluorescence and circular dichroism data confirm the ILs have no effect on heme dissociation, demonstrating that low concentrations ILs do not impact the heme dissociation from the protein and do not significantly denature myoglobin on their own or in combination with EBB. These results provide important data for future studies of the mechanism of IL-mediated protein stabilization/destabilization and biocompatibility studies.
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Affiliation(s)
- Eric M Kohn
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA.
- Bantivoglio Honors College, Rowan University, Glassboro, NJ 08028, USA.
| | - Joshua Y Lee
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA.
- Bantivoglio Honors College, Rowan University, Glassboro, NJ 08028, USA.
| | - Anthony Calabro
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA.
| | - Timothy D Vaden
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA.
| | - Gregory A Caputo
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA.
- Department of Molecular & Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA.
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22
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Akram M, Anwar S, Bhat IA, Kabir-ud-Din. Multifaceted Analysis of the Noncovalent Interactions of Myoglobin with Finely Tuned Gemini Surfactants: A Comparative Study. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01583] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohd. Akram
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Sana Anwar
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Imtiyaz Ahmad Bhat
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Kabir-ud-Din
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
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23
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Kumar PK, Jha I, Venkatesu P, Bahadur I, Ebenso EE. A comparative study of the stability of stem bromelain based on the variation of anions of imidazolium-based ionic liquids. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Room-temperature ionic liquids meet bio-membranes: the state-of-the-art. Biophys Rev 2017; 9:309-320. [PMID: 28779453 DOI: 10.1007/s12551-017-0279-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022] Open
Abstract
Room-temperature ionic liquids (RTIL) are a new class of organic salts whose melting temperature falls below the conventional limit of 100 °C. Their low vapor pressure, moreover, has made these ionic compounds the solvents of choice of the so-called green chemistry. For these and other peculiar characteristics, they are increasingly used in industrial applications. However, studies of their interaction with living organisms have highlighted mild to severe health hazards. Since their cytotoxicity shows a positive correlation with their lipophilicity, several chemical-physical studies of their interactions with biomembranes have been carried out in the last few years, aiming to identify the molecular mechanisms behind their toxicity. Cation chain length and anion nature of RTILs have seemed to affect lipophilicity and, in turn, their toxicity. However, the emerging picture raises new questions, points to the need to assess toxicity on a case-by-case basis, but also suggests a potential positive role of RTILs in pharmacology, bio-medicine and bio-nanotechnology. Here, we review this new subject of research, and comment on the future and the potential importance of this emerging field of study.
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25
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Affiliation(s)
- Toshiyuki Itoh
- Department
of Chemistry and Biotechnology, Graduate School of Engineering and ‡Center for Research
on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan
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26
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Smiatek J. Aqueous ionic liquids and their effects on protein structures: an overview on recent theoretical and experimental results. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:233001. [PMID: 28398214 DOI: 10.1088/1361-648x/aa6c9d] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ionic liquids (ILs) are used in a variety of technological and biological applications. Recent experimental and simulation results reveal the influence of aqueous ionic liquids on the stability of protein and enzyme structures. Depending on different parameters like the concentration and the ion composition, one can observe distinct stabilization or denaturation mechanisms for various ILs. In this review, we summarize the main findings and discuss the implications with regard to molecular theories of solutions and specific ion effects. A preferential binding model is introduced in order to discuss protein-IL effects from a statistical mechanics perspective. The value of the preferential binding coefficient determines the strength of the ion influence and indicates a shift of the chemical equilibrium either to the native or the denatured state of the protein. We highlight the role of water in order to explain the self-association behavior of the IL species and discuss recent experimental and simulation results in the light of the observed binding effects.
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Affiliation(s)
- Jens Smiatek
- Institute for Computational Physics, University of Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany
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28
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Hanna SL, Huang JL, Swinton AJ, Caputo GA, Vaden TD. Synergistic effects of polymyxin and ionic liquids on lipid vesicle membrane stability and aggregation. Biophys Chem 2017; 227:1-7. [PMID: 28526567 DOI: 10.1016/j.bpc.2017.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/04/2017] [Accepted: 05/06/2017] [Indexed: 12/12/2022]
Abstract
Ionic liquids (ILs) have been investigated for potential antibacterial and antibiotic applications due to their ability to destabilize and permeabilize the lipid bilayers in cell membranes. Bacterial assays have shown that combining ILs with antibiotics can provide a synergistic enhancement of their antibacterial activities. We have characterized the mechanism by which the conventional ILs 1-butyl-3-methylimidazolium chloride (BMICl) and 1-butyl-3-methylimidazolium tetrafluoroborate (BMIBF4) enhance the lipid membrane permeabilization of the well-known antibiotic polymyxin B (PMB). We studied the sizes and membrane permeabilities of multilamellar and unilamellar lipid bilayer vesicles in the presence of ILs alone in aqueous solution, PMB alone, and ILs combined together with PMB. Light scattering-based experiments show that vesicle sizes dramatically increase when ILs are combined with PMB, which suggests that the materials combine to synergistically enhance lipid membrane disruption leading to vesicle aggregation. Lipid bilayer leakage experiments using tris (2,2'-bipyridyl) ruthenium (II) (Ru(bpy)32+) trapped in lipid vesicles, in which the trapped Ru(bpy)32+ fluorescence lifetime increases when it leaks out of the vesicle, show that combining BMIBF4 and PMB together permeabilize the membrane significantly more than with PMB or the IL alone. This demonstrates that ILs can assist in antibiotic permeabilization of lipid bilayers which could explain the increased antibiotic activities in the presence of ILs in solution.
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Affiliation(s)
- Sylvia L Hanna
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Jenny L Huang
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Alana J Swinton
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Gregory A Caputo
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States; Department of Biomedical and Translational Sciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Timothy D Vaden
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States.
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29
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Borrell KL, Cancglin C, Stinger BL, DeFrates KG, Caputo GA, Wu C, Vaden TD. An Experimental and Molecular Dynamics Study of Red Fluorescent Protein mCherry in Novel Aqueous Amino Acid Ionic Liquids. J Phys Chem B 2017; 121:4823-4832. [PMID: 28425717 DOI: 10.1021/acs.jpcb.7b03582] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The search for biocompatible ionic liquids (ILs) with novel biochemical and biomedical applications has recently gained greater attention. In this report, we characterize the effects of two novel amino acid-based aqueous ILs composed of tetramethylguanidinium (TMG) and amino acids on the structure and stability of a widely used red fluorescent protein (mCherry). Our experimental data shows that while the aspartic acid-based IL (TMGAsp) has effects similar to previously studied conventional ILs (BMIBF4, EMIAc, and TMGAc), the alanine-based IL (TMGAla) has a much stronger destabilization effect on the protein structure. Addition of 0.30 M TMGAla to mCherry decreases the unfolding temperature from 83 to 60 °C. Even at 25 °C, TMGAla results in a blue shift of the mCherry absorbance and fluorescence peaks and an increased Stokes shift. Molecular dynamics simulations show that the chromophore conformation and its interaction with mCherry with TMGAla are changed relative to those with TMGAsp or in the absence of ILs. Protein-ILs contact analysis indicates that the mCherry-Asp interactions are hydrophilic but the (fewer) mCherry-Ala interactions are more hydrophobic and may modulate the TMG interaction with the protein. Hence, the anion hydrophobicity may explain the special TMGAla destabilization of mCherry.
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Affiliation(s)
- Kelsey L Borrell
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Christine Cancglin
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Brittany L Stinger
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Kelsey G DeFrates
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Gregory A Caputo
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Chun Wu
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Timothy D Vaden
- Department of Chemistry and Biochemistry amd ‡Department of Biomedical and Translational Sciences, Rowan University , 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
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30
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Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
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31
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Kobayashi T, Reid JESJ, Shimizu S, Fyta M, Smiatek J. The properties of residual water molecules in ionic liquids: a comparison between direct and inverse Kirkwood–Buff approaches. Phys Chem Chem Phys 2017; 19:18924-18937. [DOI: 10.1039/c7cp03717a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomistic molecular dynamics simulations of aqueous ionic liquid mixtures were performed in order to compare the resulting Kirkwood–Buff integrals with experimental data and the corresponding integrals derived by an inverse Kirkwood–Buff approach.
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Affiliation(s)
- Takeshi Kobayashi
- Institute for Computational Physics
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Joshua E. S. J. Reid
- York Structural Biology Laboratory
- Department of Chemistry
- University of York
- York YO10 5DD
- UK
| | - Seishi Shimizu
- York Structural Biology Laboratory
- Department of Chemistry
- University of York
- York YO10 5DD
- UK
| | - Maria Fyta
- Institute for Computational Physics
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Jens Smiatek
- Institute for Computational Physics
- University of Stuttgart
- 70569 Stuttgart
- Germany
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32
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Wiedemann C, Ohlenschläger O, Mrestani-Klaus C, Bordusa F. NMR spectroscopic studies of a TAT-derived model peptide in imidazolium-based ILs: influence on chemical shifts and the cis/trans equilibrium state. Phys Chem Chem Phys 2017; 19:24115-24125. [DOI: 10.1039/c7cp03295a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The impact of ionic liquids on the chemical shifts and the cis/trans equilibrium state of a model peptide was systematically investigated by NMR spectroscopy.
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Affiliation(s)
- Christoph Wiedemann
- Institute of Biochemistry and Biotechnology
- Martin-Luther-University Halle-Wittenberg
- D-06120 Halle
- Germany
| | | | - Carmen Mrestani-Klaus
- Institute of Biochemistry and Biotechnology
- Martin-Luther-University Halle-Wittenberg
- D-06120 Halle
- Germany
| | - Frank Bordusa
- Institute of Biochemistry and Biotechnology
- Martin-Luther-University Halle-Wittenberg
- D-06120 Halle
- Germany
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33
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Miller MC, Hanna SL, DeFrates KG, Fiebig OC, Vaden TD. Kinetics and mass spectrometric measurements of myoglobin unfolding in aqueous ionic liquid solutions. Int J Biol Macromol 2016; 85:200-7. [DOI: 10.1016/j.ijbiomac.2015.12.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 12/14/2015] [Accepted: 12/19/2015] [Indexed: 01/27/2023]
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34
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Brogan APS, Hallett JP. Solubilizing and Stabilizing Proteins in Anhydrous Ionic Liquids through Formation of Protein-Polymer Surfactant Nanoconstructs. J Am Chem Soc 2016; 138:4494-501. [PMID: 26976718 DOI: 10.1021/jacs.5b13425] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nonaqueous biocatalysis is rapidly becoming a desirable tool for chemical and fuel synthesis in both the laboratory and industry. Similarly, ionic liquids are increasingly popular anhydrous reaction media for a number of industrial processes. Consequently, the use of enzymes in ionic liquids as efficient, environment-friendly, commercial biocatalysts is highly attractive. However, issues surrounding the poor solubility and low stability of enzymes in truly anhydrous media remain a significant challenge. Here, we demonstrate for the first time that engineering the surface of a protein to yield protein-polymer surfactant nanoconstructs allows for dissolution of dry protein into dry ionic liquids. Using myoglobin as a model protein, we show that this method can deliver protein molecules with near native structure into both hydrophilic and hydrophobic anhydrous ionic liquids. Remarkably, using temperature-dependent synchrotron radiation circular dichroism spectroscopy to measure half-denaturation temperatures, our results show that protein stability increases by 55 °C in the ionic liquid as compared to aqueous solution, pushing the solution thermal denaturation beyond the boiling point of water. Therefore, the work presented herein could provide a platform for the realization of biocatalysis at high temperatures or in anhydrous solvent systems.
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Affiliation(s)
- Alex P S Brogan
- Department of Chemical Engineering, Imperial College , London SW7 2AZ , United Kingdom
| | - Jason P Hallett
- Department of Chemical Engineering, Imperial College , London SW7 2AZ , United Kingdom
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35
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Kumar A, Bisht M, Venkatesu P. Exploring the structure and stability of amino acids and glycine peptides in biocompatible ionic liquids. RSC Adv 2016. [DOI: 10.1039/c5ra26690d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Amino acids (AAs) are vital components for a variety of biological systems and can be linked through covalent bonds (or peptide bonds) to form a protein structure.
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Affiliation(s)
- Awanish Kumar
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
| | - Meena Bisht
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
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36
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Zhao H. Protein Stabilization and Enzyme Activation in Ionic Liquids: Specific Ion Effects. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY (OXFORD, OXFORDSHIRE : 1986) 2016; 91:25-50. [PMID: 26949281 PMCID: PMC4777319 DOI: 10.1002/jctb.4837] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/12/2015] [Indexed: 05/08/2023]
Abstract
There are still debates on whether the hydration of ions perturbs the water structure, and what is the degree of such disturbance; therefore, the origin of Hofmeister effect on protein stabilization continues being questioned. For this reason, it is suggested to use the 'specific ion effect' instead of other misleading terms such as Hofmeister effect, Hofmeister series, lyotropic effect, and lyotropic series. In this review, we firstly discuss the controversial aspect of inorganic ion effects on water structures, and several possible contributors to the specific ion effect of protein stability. Due to recent overwhelming attraction of ionic liquids (ILs) as benign solvents in many enzymatic reactions, we further evaluate the structural properties and molecular-level interactions in neat ILs and their aqueous solutions. Next, we systematically compare the specific ion effects of ILs on enzyme stability and activity, and conclude that (a) the specificity of many enzymatic systems in diluted aqueous IL solutions is roughly in line with the traditional Hofmeister series albeit some exceptions; (b) however, the specificity follows a different track in concentrated or neat ILs because other factors (such as hydrogen-bond basicity, nucelophilicity, and hydrophobicity, etc) are playing leading roles. In addition, we demonstrate some examples of biocatalytic reactions in IL systems that are guided by the empirical specificity rule.
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Affiliation(s)
- Hua Zhao
- Department of Chemistry and Forensic Science, Savannah State University, Savannah, GA 31404, USA
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37
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Jha I, Venkatesu P. Endeavour to simplify the frustrated concept of protein-ammonium family ionic liquid interactions. Phys Chem Chem Phys 2015; 17:20466-84. [DOI: 10.1039/c5cp01735a] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Schematic representation of protein stabilization/destabilization in the presence of ionic liquids.
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Affiliation(s)
- Indrani Jha
- Department of Chemistry
- University of Delhi
- Delhi – 110007
- India
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