1
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Chen M, Jin T, Nian B, Cheng W. Solvent Tolerance Improvement of Lipases Enhanced Their Applications: State of the Art. Molecules 2024; 29:2444. [PMID: 38893320 PMCID: PMC11173743 DOI: 10.3390/molecules29112444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/08/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Lipases, crucial catalysts in biochemical synthesis, find extensive applications across industries such as food, medicine, and cosmetics. The efficiency of lipase-catalyzed reactions is significantly influenced by the choice of solvents. Polar organic solvents often result in a decrease, or even loss, of lipase activity. Conversely, nonpolar organic solvents induce excessive rigidity in lipases, thereby affecting their activity. While the advent of new solvents like ionic liquids and deep eutectic solvents has somewhat improved the activity and stability of lipases, it fails to address the fundamental issue of lipases' poor solvent tolerance. Hence, the rational design of lipases for enhanced solvent tolerance can significantly boost their industrial performance. This review provides a comprehensive summary of the structural characteristics and properties of lipases in various solvent systems and emphasizes various strategies of protein engineering for non-aqueous media to improve lipases' solvent tolerance. This study provides a theoretical foundation for further enhancing the solvent tolerance and industrial properties of lipases.
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Affiliation(s)
| | | | | | - Wenjun Cheng
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, China; (M.C.); (T.J.); (B.N.)
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2
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Egorova KS, Kibardin AV, Posvyatenko AV, Ananikov VP. Mechanisms of Biological Effects of Ionic Liquids: From Single Cells to Multicellular Organisms. Chem Rev 2024; 124:4679-4733. [PMID: 38621413 DOI: 10.1021/acs.chemrev.3c00420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
The review presents a detailed discussion of the evolving field studying interactions between ionic liquids (ILs) and biological systems. Originating from molten salt electrolytes to present multiapplication substances, ILs have found usage across various fields due to their exceptional physicochemical properties, including excellent tunability. However, their interactions with biological systems and potential influence on living organisms remain largely unexplored. This review examines the cytotoxic effects of ILs on cell cultures, biomolecules, and vertebrate and invertebrate organisms. Our understanding of IL toxicity, while growing in recent years, is yet nascent. The established findings include correlations between harmful effects of ILs and their ability to disturb cellular membranes, their potential to trigger oxidative stress in cells, and their ability to cause cell death via apoptosis. Future research directions proposed in the review include studying the distribution of various ILs within cellular compartments and organelles, investigating metabolic transformations of ILs in cells and organisms, detailed analysis of IL effects on proteins involved in oxidative stress and apoptosis, correlation studies between IL doses, exposure times and resulting adverse effects, and examination of effects of subtoxic concentrations of ILs on various biological objects. This review aims to serve as a critical analysis of the current body of knowledge on IL-related toxicity mechanisms. Furthermore, it can guide researchers toward the design of less toxic ILs and the informed use of ILs in drug development and medicine.
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Affiliation(s)
- Ksenia S Egorova
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Alexey V Kibardin
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of Russian Federation, Moscow 117198, Russia
| | - Alexandra V Posvyatenko
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Ministry of Health of Russian Federation, Moscow 117198, Russia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
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3
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Russo S, Bodo E. Solvation of Model Biomolecules in Choline-Aminoate Ionic Liquids: A Computational Simulation Using Polarizable Force Fields. Molecules 2024; 29:1524. [PMID: 38611804 PMCID: PMC11013605 DOI: 10.3390/molecules29071524] [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: 03/12/2024] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
One can foresee a very near future where ionic liquids will be used in applications such as biomolecular chemistry or medicine. The molecular details of their interaction with biological matter, however, are difficult to investigate due to the vast number of combinations of both the biological systems and the variety of possible liquids. Here, we provide a computational study aimed at understanding the interaction of a special class of biocompatible ionic liquids (choline-aminoate) with two model biological systems: an oligopeptide and an oligonucleotide. We employed molecular dynamics with a polarizable force field. Our results are in line with previous experimental and computational evidence on analogous systems and show how these biocompatible ionic liquids, in their pure form, act as gentle solvents for protein structures while simultaneously destabilizing DNA structure.
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Affiliation(s)
| | - Enrico Bodo
- Chemistry Department, University of Rome “La Sapienza”, P.le Aldo Moro 5, 00185 Rome, Italy;
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4
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Goulden T, Bodachivskyi I, Padula MP, Williams DBG. Concentrated ionic liquids for proteomics: Caveat emptor! Int J Biol Macromol 2023; 253:127438. [PMID: 37839603 DOI: 10.1016/j.ijbiomac.2023.127438] [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: 06/27/2023] [Revised: 10/03/2023] [Accepted: 10/12/2023] [Indexed: 10/17/2023]
Abstract
The use of concentrated ionic liquids (ILs) in the bioanalytical chemistry of proteins is sparse; typically, dilute aqueous IL solutions are used. Concentrated ILs have unique properties that may allow researchers to dissolve previously insoluble protein analytes, to increase the depth and robustness of sample preparation and the analysis of proteins. Previous research using concentrated ILs for this purpose is sparse and there is a need to systematically investigate the structure-activity relationship between the IL structure and its capacity to solubilise proteins. Here, bovine serum albumin was dissolved in various ionic liquids and monitored over time by light microscopy and SDS-PAGE. While qualitative, these measures provide a good estimate of, respectively, the dissolving power of an IL towards the given protein and the retained integrity of the protein. Hydrophilic ILs show the best solubilisation capacity and higher temperatures (in a restricted sense) improve the solubility of the protein. Higher temperatures and longer reaction times reduce the molecular weight of the protein, which could inhibit their applicability in proteomics, unless the conditions are judiciously controlled. Researchers should exercise caution when using concentrated ILs for protein analysis until the full scope and limitations are known, an aspect we are presently investigating.
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Affiliation(s)
- Thomas Goulden
- University of Technology Sydney, School of Mathematical and Physical Sciences, 15 Broadway, Sydney, NSW 2007, Australia
| | - Iurii Bodachivskyi
- University of Technology Sydney, School of Mathematical and Physical Sciences, 15 Broadway, Sydney, NSW 2007, Australia; V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine, 1 Academician Kukhar St, Kyiv 02094, Ukraine
| | - Matthew P Padula
- University of Technology Sydney, School of Life Sciences, 15 Broadway, Sydney, NSW 2007, Australia
| | - D Bradley G Williams
- University of Technology Sydney, School of Mathematical and Physical Sciences, 15 Broadway, Sydney, NSW 2007, Australia; University of Wollongong, School of Chemistry and Molecular Bioscience, Wollongong, NSW 2522, Australia.
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5
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Richu, Sharmhal A, Kumar A, Kumar A. Insights into the applications and prospects of ionic liquids towards the chemistry of biomolecules. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Haskew MJ, Nikman S, O'Sullivan CE, Galeb HA, Halcovitch NR, Hardy JG, Murphy ST. Mg/Zn metal‐air primary batteries using silk fibroin‐ionic liquid polymer electrolytes. NANO SELECT 2022. [DOI: 10.1002/nano.202200200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Mathew J. Haskew
- School of Engineering Lancaster University Bailrigg Lancaster UK
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
| | - Shahin Nikman
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
| | - Carys E. O'Sullivan
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
| | - Hanaa A. Galeb
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
- Department of Chemistry Science and Arts College, Rabigh Campus King Abdulaziz University Jeddah Saudi Arabia
| | - Nathan R. Halcovitch
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
| | - John G. Hardy
- Department of Chemistry Lancaster University Faraday Building Bailrigg Lancaster UK
- Materials Science Institute Lancaster University Faraday Building, John Creed Avenue Bailrigg Lancaster UK
| | - Samuel T. Murphy
- School of Engineering Lancaster University Bailrigg Lancaster UK
- Materials Science Institute Lancaster University Faraday Building, John Creed Avenue Bailrigg Lancaster UK
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7
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An Overview on the Recent Advances in Alternative Solvents as Stabilizers of Proteins and Enzymes. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6040051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Currently, the use of alternative solvents is increasing, namely ionic liquids (ILs) and deep eutectic solvents (DESs) in diverse fields of knowledge, such as biochemistry, chemistry, chemical engineering, biotechnology and biomedicine. Particularly, when compared to traditional solvents, these alternative solvents have great importance for biomolecules due to the enhanced solubility, structure stability and the biological activity of biomolecules, such as protein and enzymes. Thus, in this review article, the recent developments and efforts on the technological developments carried out with ILs and DESs for the stabilization and activation of proteins and enzymes are provided. The most studied IL- and DES-based formulations for proteins and enzymes are discussed and the molecular mechanisms and interactions related to the increased stability promoted by these alternative solvents are disclosed, while emphasizing their main advantages.
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8
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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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9
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Li R, Liu Z, Jiang F, Zhao Y, Yang G, Hong L. Enhancement of thermal stability of proteinase K by biocompatible cholinium-based ionic liquids. Phys Chem Chem Phys 2022; 24:13057-13065. [PMID: 35583879 DOI: 10.1039/d1cp04782e] [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
Proteinase K (PK) is a proteolytic enzyme that has been widely used in nucleic acid purification, leather production, environmental protection, and other industrial applications. However, this biocatalyst cannot tolerate high temperatures which has severely restricted its wider application. As reported in previous studies, cholinium-based ionic liquids (ILs) have gained tremendous attention serving as a promising media to stabilize and preserve proteins, DNA, and other biomolecules due to their environmentally benign nature and biocompatibility. In this work, we chose 13 different kinds of cholinium-based ILs to examine their effects on the thermal stability and enzymatic activity of PK. We found that biocompatible cholinium-based ions with appropriately chosen anions can greatly improve the thermal stability of PK, whose melting temperature (Tm) is increased from ∼74.4 °C to 87.7 °C. However, the enzymatic activity is slightly reduced in the presence of ILs. Further comparison of our results with other literature findings suggests that kosmotropic anions of cholinium-based ILs are crucial to maintain the thermal stability of proteins. However, to achieve the best performance, the choice of IL anions is protein specific.
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Affiliation(s)
- Rui Li
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhuo Liu
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai National Center for Applied Mathematics (SJTU center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fan Jiang
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yang Zhao
- Institute of Biothermal Science and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Guangyu Yang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Liang Hong
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China. .,Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai National Center for Applied Mathematics (SJTU center), MOE-LSC, Shanghai Jiao Tong University, Shanghai 200240, China
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10
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Benedetto A, Kelley EG. Absorption of the [bmim][Cl] Ionic Liquid in DMPC Lipid Bilayers across Their Gel, Ripple, and Fluid Phases. J Phys Chem B 2022; 126:3309-3318. [PMID: 35472281 PMCID: PMC9082605 DOI: 10.1021/acs.jpcb.2c00710] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
Lipid bilayers are
a key component of cell membranes and play a
crucial role in life and in bio-nanotechnology. As a result, controlling
their physicochemical properties holds the promise of effective therapeutic
strategies. Ionic liquids (ILs)—a vast class of complex organic
electrolytes—have shown a high degree of affinity with lipid
bilayers and can be exploited in this context. However, the chemical
physics of IL absorption and partitioning into lipid bilayers is yet
to be fully understood. This work focuses on the absorption of the
model IL [bmim][Cl] into 1,2-dimyristoyl-sn-glycero-3-phosphocholine
(DMPC) lipid bilayers across their gel, ripple, and fluid phases.
Here, by small-angle neutron scattering, we show that (i) the IL cations
are absorbed in the lipid bilayer in all its thermodynamic phases
and (ii) the amount of IL inserted into the lipid phase increased
with increasing temperature, changing from three to four IL cations
per 10 lipids with increasing temperature from 10 °C in the gel
phase to 40 °C in the liquid phase, respectively. An explicative
hypothesis, based on the entropy gain coming from the IL hydration
water, is presented to explain the observed temperature trend. The
ability to control IL absorption with temperature can be used as a
handle to tune the effect of ILs on biomembranes and can be exploited
in bio-nanotechnological applications.
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Affiliation(s)
- Antonio Benedetto
- Department of Science, University of Roma Tre, 00146 Rome, Italy.,School of Physics, and Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland.,Laboratory for Neutron Scattering, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Elizabeth G Kelley
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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11
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Curreri AM, Mitragotri S, Tanner EEL. Recent Advances in Ionic Liquids in Biomedicine. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2004819. [PMID: 34245140 PMCID: PMC8425867 DOI: 10.1002/advs.202004819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/04/2021] [Indexed: 05/04/2023]
Abstract
The use of ionic liquids and deep eutectic solvents in biomedical applications has grown dramatically in recent years due to their unique properties and their inherent tunability. This review will introduce ionic liquids and deep eutectics and discuss their biomedical applications, namely solubilization of drugs, creation of active pharmaceutical ingredients, delivery of pharmaceuticals through biological barriers, stabilization of proteins and other nucleic acids, antibacterial agents, and development of new biosensors. Current challenges and future outlooks are discussed, including biocompatibility, the potential impact of the presence of impurities, and the importance of understanding the microscopic interactions in ionic liquids in order to design task-specific solvents.
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Affiliation(s)
- Alexander M. Curreri
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
- Wyss Institute of Biologically Inspired EngineeringBostonMA02115USA
| | - Samir Mitragotri
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
- Wyss Institute of Biologically Inspired EngineeringBostonMA02115USA
| | - Eden E. L. Tanner
- John A. Paulson School of Engineering and Applied SciencesHarvard UniversityCambridgeMA02138USA
- Present address:
Department of Chemistry and BiochemistryThe University of MississippiUniversityMS38677USA
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12
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Effect of Hydrated Ionic Liquid on Photocycle and Dynamics of Photoactive Yellow Protein. Molecules 2021; 26:molecules26154554. [PMID: 34361707 PMCID: PMC8348629 DOI: 10.3390/molecules26154554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/15/2021] [Accepted: 07/23/2021] [Indexed: 12/03/2022] Open
Abstract
The mechanism by which proteins are solvated in hydrated ionic liquids remains an open question. Herein, the photoexcitation dynamics of photoactive yellow protein dissolved in hydrated choline dihydrogen phosphate (Hy[ch][dhp]) were studied by transient absorption and transient grating spectroscopy. The photocyclic reaction of the protein in Hy[ch][dhp] was similar to that observed in the buffer solution, as confirmed by transient absorption spectroscopy. However, the structural change of the protein during the photocycle in Hy[ch][dhp] was found to be different from that observed in the buffer solution. The known change in the diffusion coefficient of the protein was apparently suppressed in high concentrations of [ch][dhp], plausibly due to stabilization of the secondary structure.
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13
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Bryant SJ, Brown SJ, Martin AV, Arunkumar R, Raju R, Elbourne A, Bryant G, Drummond CJ, Greaves TL. Cryopreservation of mammalian cells using protic ionic liquid solutions. J Colloid Interface Sci 2021; 603:491-500. [PMID: 34214724 DOI: 10.1016/j.jcis.2021.06.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/02/2021] [Accepted: 06/15/2021] [Indexed: 02/08/2023]
Abstract
Cryopreservation has facilitated considerable advances in both medical technology and scientific research. However, further developments have been limited by the relatively low number of effective cryoprotective agents. Even after fifty years of research, most protocols rely on the same two toxic agents, i.e. dimethylsulfoxide or glycerol. Ionic liquids are a class of promising solvents which are known glass formers and may offer a less-toxic alternative. The research presented here investigates ten protic ionic liquids as potential cryoprotective agents. The liquids are screened for key properties including cellular toxicity, permeability and thermal behaviour. The most promising, ethylammonium acetate, was then tested as a cryoprotective agent on a model cell line and was found to be as effective as the common cryoprotectant, dimethylsulfoxide. This work reports the first use of a protic ionic liquid as an effective cryoprotective agent for a mammalian cell line. This will inform the development of a suite of potential new ionic liquid-based cryoprotectants that could potentially allow the cryopreservation of new cell types.
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Affiliation(s)
- Saffron J Bryant
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Stuart J Brown
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Andrew V Martin
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Radhika Arunkumar
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Rekha Raju
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Aaron Elbourne
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Gary Bryant
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Calum J Drummond
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia
| | - Tamar L Greaves
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Australia.
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14
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Egorova KS, Posvyatenko AV, Fakhrutdinov AN, Galushko AS, Seitkalieva MM, Ananikov VP. Synergistic/antagonistic cytotoxic effects in mixtures of ionic liquids with doxorubicin or mitoxantrone. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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15
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Reddy RR, Reddy JG, Kumar BVNP. NMR investigations on binding and dynamics of imidazolium-based ionic liquids with HEWL. Phys Chem Chem Phys 2020; 22:23824-23836. [PMID: 33073278 DOI: 10.1039/d0cp04584e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Molecular level insights on protein-ionic liquid (P-IL) interactions are beneficial for assessing protein stability, binding and dynamics. In the present work, interactions of ILs, namely, 1-butyl 3-methylimidazolium methyl sulfate (IL1), 1-butyl 3-methylimidazolium octyl sulfate (IL2) and 1-butyl 3-methylimidazolium chloride (IL3) with hen egg white lysozyme (HEWL) protein were investigated using solution-state nuclear magnetic resonance (NMR) spectroscopy. To ascertain the binding and dynamics from the perspective of both protein and IL, various ligand based NMR approaches such as selective and non-selective nuclear spin-relaxation (R1SEL and R1NS), saturation transfer difference (STD), difference of inversion recovery rate with and without target irradiation (DIRECTION), 35Cl line-shape and spin-relaxation, and protein back bone amide chemical shift perturbations (CSPs) from 1H-15N HSQC were utilized. Among the ILs investigated, IL2 experiences significant interaction relative to those of IL1 and IL3, as revealed by the combined R1SEL and R1NS analysis, which is further supported by STD NMR. CSP analyses of 1H-15N HSQC spectra of aqueous P-IL mixtures enabled to identify the potential binding sites of ILs with HEWL. Whereas, 15N longitudinal (R1) and transverse (R2) spin-relaxation rates and 15N{1H} heteronuclear nuclear Overhauser effect (hetNOE) data subjected to the model free analysis for IL2 yielded the rotational correlation times and order parameters of various residues of HEWL. Furthermore, the results could discern the nature of interactions between studied ILs and HEWL in terms of specific and non-specific interactions.
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Affiliation(s)
- R Ravikanth Reddy
- NMR, Centre for Analysis, Testing, Evaluation & Reporting Services (CATERS), CSIR-Central Leather Research Institute, Chennai - 600020, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
| | - Jithender G Reddy
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India and NMR Division, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
| | - B V N Phani Kumar
- NMR, Centre for Analysis, Testing, Evaluation & Reporting Services (CATERS), CSIR-Central Leather Research Institute, Chennai - 600020, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
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16
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Unveiling the thermodynamic signature underlying the interaction of human serum albumin with sub-micellar concentrations of a surface active ionic liquid. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Shmool TA, Martin LK, Clarke CJ, Bui-Le L, Polizzi KM, Hallett JP. Exploring conformational preferences of proteins: ionic liquid effects on the energy landscape of avidin. Chem Sci 2020; 12:196-209. [PMID: 34163590 PMCID: PMC8178808 DOI: 10.1039/d0sc04991c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In this work we experimentally investigate solvent and temperature induced conformational transitions of proteins and examine the role of ion–protein interactions in determining the conformational preferences of avidin, a homotetrameric glycoprotein, in choline-based ionic liquid (IL) solutions. Avidin was modified by surface cationisation and the addition of anionic surfactants, and the structural, thermal, and conformational stabilities of native and modified avidin were examined using dynamic light scattering, differential scanning calorimetry, and thermogravimetric analysis experiments. The protein-surfactant nanoconjugates showed higher thermostability behaviour compared to unmodified avidin, demonstrating distinct conformational ensembles. Small-angle X-ray scattering data showed that with increasing IL concentration, avidin became more compact, interpreted in the context of molecular confinement. To experimentally determine the detailed effects of IL on the energy landscape of avidin, differential scanning fluorimetry and variable temperature circular dichroism spectroscopy were performed. We show that different IL solutions can influence avidin conformation and thermal stability, and we provide insight into the effects of ILs on the folding pathways and thermodynamics of proteins. To further study the effects of ILs on avidin binding and correlate thermostability with conformational heterogeneity, we conducted a binding study. We found the ILs examined inhibited ligand binding in native avidin while enhancing binding in the modified protein, indicating ILs can influence the conformational stability of the distinct proteins differently. Significantly, this work presents a systematic strategy to explore protein conformational space and experimentally detect and characterise ‘invisible’ rare conformations using ILs. Revealing solvent and temperature induced conformational transitions of proteins and the role of ion–protein interactions in determining the conformational preferences of avidin in ionic liquids.![]()
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Affiliation(s)
- Talia A Shmool
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388
| | - Laura K Martin
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388.,Imperial College Centre for Synthetic Biology, Imperial College London London SW7 2AZ UK
| | - Coby J Clarke
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388
| | - Liem Bui-Le
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388
| | - Karen M Polizzi
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388.,Imperial College Centre for Synthetic Biology, Imperial College London London SW7 2AZ UK
| | - Jason P Hallett
- Department of Chemical Engineering, Imperial College London London SW7 2AZ UK +44 (0)20 7594 5388
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How does bovine serum albumin sustain in saccharomate® derived from pine tree biomass? Colloids Surf B Biointerfaces 2020; 191:110975. [PMID: 32213431 DOI: 10.1016/j.colsurfb.2020.110975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/06/2020] [Accepted: 03/12/2020] [Indexed: 11/24/2022]
Abstract
Nowadays, research on renewable raw materials and bioresources is a new concern towards the promotion of sustainable process and product development. The use of various plant biomasses such as starch, lignocellulosic and saccharide can be considered as an alternative for using cheaper and less polluting raw materials. In this regard, pine tree biomass, a lignocellulosic forest residue that has various value-added importance and it acts as a model of economic value to the agro-industrial fields. On the other hand, in order to meet and address the challenges of ever-increasing demands of bioresources, there has been significant research interest in deciphering the molecular interactions between proteins and biomass derived substances. No study reports the significance of saccharomate® derived from pine tree biomass on the structural and thermal stability of proteins. There is a sizable interest in the interactions between proteins and biomass derived substances, owing to their utilization and applications. Herein, we used various biophysical techniques such as absorption spectroscopy, fluorescence spectroscopy, circular dichroism (CD) and dynamic light scattering (DLS) to study the impact of pine tree biomass derived saccharomate® (PBDS) on bovine serum albumin (BSA). Further for better understanding of morphological changes of BSA in presence of biomass, Transmission electron microscopy (TEM) was also studied. The present study revealed that the increasing concentration of saccharomate® perturbs structural stability however; the thermal stability of BSA remained unchanged. The transition temperature of BSA remained approximately same in presence of different concentrations of PBDS. Furthermore, the size of BSA increases from 9.22 nm to 135.58 nm in presence of higher concentration of PBDS as revealed by DLS studies. To the best of our knowledge, the results represent first detailed proof of the unusual effect of PBDS on the model protein BSA.
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