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Ghanta KP, Bandyopadhyay S. Counteraction Effects of Ammonium-Based Ionic Liquids on Urea-Induced Denaturation of α-Lactalbumin: A Comprehensive Molecular Simulation Study. J Phys Chem B 2023; 127:7251-7265. [PMID: 37574910 DOI: 10.1021/acs.jpcb.3c03223] [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: 08/15/2023]
Abstract
Ionic liquids (ILs) are known to stabilize protein conformations in aqueous medium. Importantly, ILs can also act as refolding additives in urea-driven denaturation of proteins. However, despite the importance of the problem, detailed microscopic understanding of the counteraction effects of ILs on urea-induced protein denaturation remains elusive. In this work, atomistic molecular dynamics (MD) simulations of the protein α-lactalbumin have been carried out in pure aqueous medium, in 8 M binary urea-water solution and in ternary urea-IL-water solutions containing ammonium-based ethyl ammonium acetate (EAA) as the IL at different concentrations (1-4 M). Attempts have been made to quantify detailed molecular-level understanding of the origin behind the counteraction effects of the IL on urea-induced partial unfolding of the protein. The calculations revealed significant conformational changes of the protein with multiple free energy minima due to its partial unfolding in binary urea-water solution. The counteraction effect of the IL was evident from the enhanced structural rigidity of the protein with propensity to transform into a single native free energy minimum state in ternary urea-IL-water solutions. Such an effect has been found to be associated with preferential direct binding of the IL components with the protein and simultaneous expulsion of urea from the interface, thereby providing additional stabilization of the protein in ternary solutions. Most importantly, modified rearrangement of the hydrogen bond network at the interface due to the formation of stronger protein-cation (PC) and protein-anion (PA) hydrogen bonds by breaking relatively weaker protein-urea (PU) and protein-water (PW) hydrogen bonds has been recognized as the microscopic origin behind the counteraction effects of EAA on urea-induced partial unfolding of the protein.
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Affiliation(s)
- Krishna Prasad Ghanta
- Molecular Modeling Laboratory, Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sanjoy Bandyopadhyay
- Molecular Modeling Laboratory, Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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2
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Klausser R, Kopp J, Prada Brichtova E, Gisperg F, Elshazly M, Spadiut O. State-of-the-art and novel approaches to mild solubilization of inclusion bodies. Front Bioeng Biotechnol 2023; 11:1249196. [PMID: 37545893 PMCID: PMC10399460 DOI: 10.3389/fbioe.2023.1249196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/12/2023] [Indexed: 08/08/2023] Open
Abstract
Throughout the twenty-first century, the view on inclusion bodies (IBs) has shifted from undesired by-products towards a targeted production strategy for recombinant proteins. Inclusion bodies can easily be separated from the crude extract after cell lysis and contain the product in high purity. However, additional solubilization and refolding steps are required in the processing of IBs to recover the native protein. These unit operations remain a highly empirical field of research in which processes are developed on a case-by-case basis using elaborate screening strategies. It has been shown that a reduction in denaturant concentration during protein solubilization can increase the subsequent refolding yield due to the preservation of correctly folded protein structures. Therefore, many novel solubilization techniques have been developed in the pursuit of mild solubilization conditions that avoid total protein denaturation. In this respect, ionic liquids have been investigated as promising agents, being able to solubilize amyloid-like aggregates and stabilize correctly folded protein structures at the same time. This review briefly summarizes the state-of-the-art of mild solubilization of IBs and highlights some challenges that prevent these novel techniques from being yet adopted in industry. We suggest mechanistic models based on the thermodynamics of protein unfolding with the aid of molecular dynamics simulations as a possible approach to solve these challenges in the future.
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Affiliation(s)
- Robert Klausser
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
| | - Julian Kopp
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
| | - Eva Prada Brichtova
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
| | - Florian Gisperg
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
| | - Mohamed Elshazly
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
| | - Oliver Spadiut
- Research Division Integrated Bioprocess Development, Institute of Chemical, Environmental and Bioscience, Vienna, Austria
- Christian Doppler Laboratory IB Processing 4.0, Technische Universität Wien, Vienna, Austria
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3
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Yadav N, Mor S, Venkatesu P. The attenuating ability of deep eutectic solvents towards the carboxylated multiwalled carbon nanotubes induced denatured β-lactoglobulin structure. Phys Chem Chem Phys 2023. [PMID: 37470288 DOI: 10.1039/d3cp02908e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
The stabilization of proteins has been a major challenge for their practical utilization in industrial applications. Proteins can easily lose their native conformation in the presence of denaturants, which unfolds the protein structure. Since the introduction of deep eutectic solvents (DESs), there are numerous studies in which DESs act as promising co-solvents that are biocompatible with biomolecules. DESs have emerged as sustainable biocatalytic media and an alternative to conventional organic solvents and ionic liquids (ILs). However, the superiority of DESs over the deleterious influence of denaturants on proteins is often neglected. To address this, we present the counteracting ability of biocompatible DESs, namely, choline chloride-glycerol (DES-1) and choline chloride-urea (DES-2), against the structural changes induced in β-lactoglobulin (Blg) by carboxylated multiwalled carbon nanotubes (CA-MWCNTs). The work is substantiated with various spectroscopic and thermal studies. The spectroscopic results revealed that the fluorescence emission intensity enhances for the protein in DESs. Contrary to this, the emission intensity extremely quenches in the presence of CA-MWCNTs. However, in the mixture of DESs and CA-MWCNTs, there was a slight increase in the fluorescence intensity. Circular dichroism spectral studies reflect the reappearance of the native band that was lost in the presence of CA-MWCNTs, which is a good indicator of the counteraction ability of DESs. Further, thermal fluorescence studies showed that the protein exhibited extremely great thermal stability in both DESs as well as in the mixture of DES-CA-MWCNTs compared to the protein in buffer. This study is also supported by dynamic light scattering and zeta potential measurements; the results reveal that DESs were successfully able to maintain the protein structure. The addition of CA-MWCNTs results in complex formation with the protein, which is indicated by the increased hydrodynamic size of the protein. The presence of DESs in the mixture of CA-MWCNTs and DESs was quite successful in eliminating the negative impact of CA-MWCNTs on protein structural alteration. DES-1 proved to be superior to DES-2 over counteraction against CA-MWCNTs and maintained the native conformation of the protein. Overall, both DESs act as recoiling media for both native and unfolded (denatured by CA-MWCNTs) Blg structures. Both the DESs can be described as potential co-solvents for Blg with increased structural and thermal stability of the protein. To the best of our knowledge, this study for the first time has demonstrated the role of choline-based DESs in the mixture with CA-MWCNTs in the structural transition of Blg. The DESs in the mixture successfully enhance the stability of the protein by reducing the perturbation caused by CA-MWCNTs and then amplifying the advantages of the DESs present in the mixture. Overall, these results might find implications for understanding the role of DES-CA-MWCNT mixtures in protein folding/unfolding and pave a new direction for the development of eco-friendly protein-protective solvents.
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Affiliation(s)
- Niketa Yadav
- Department of Chemistry, University of Delhi, Delhi, 110 007, India.
| | - Sanjay Mor
- Department of Chemistry, University of Delhi, Delhi, 110 007, India.
| | - Pannuru Venkatesu
- Department of Chemistry, University of Delhi, Delhi, 110 007, India.
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4
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Ghorbani SM, Housaindokht MR, Bozorgmehr MR. Investigating the effect of 1-Butyl-3-methylimidazolium bromide and 1-Butyl-3-methylimidazolium methyl sulfate ionic liquids on structure and function of Chloroproxidase by molecular dynamics simulation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Rakowska PW, Kloskowski A. Impact of the Alkyl Side Chains of Cations and Anions on the Activity and Renaturation of Lysozyme: A Systematic Study Performed Using Six Amino‐Acid‐Based Ionic Liquids. ChemistrySelect 2021. [DOI: 10.1002/slct.202004357] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Paulina W. Rakowska
- Department of Physical Chemistry Faculty of Chemistry Gdańsk University of Technology ul. Narutowicza 11/12 Gdańsk 80-233 Poland
| | - Adam Kloskowski
- Department of Physical Chemistry Faculty of Chemistry Gdańsk University of Technology ul. Narutowicza 11/12 Gdańsk 80-233 Poland
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6
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Sarkar S, Maity A, Chakrabarti R. Microscopic structural features of water in aqueous-reline mixtures of varying compositions. Phys Chem Chem Phys 2021; 23:3779-3793. [PMID: 33532810 DOI: 10.1039/d0cp05341d] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reline, a mixture of urea and choline chloride in a 2 : 1 molar ratio, is one of the most frequently used deep eutectic solvents. Pure reline and its aqueous solution have large scale industrial use. Owing to the presence of active hydrogen bond formation sites, urea and choline cations can disrupt the hydrogen-bonded network in water. However, a quantitative understanding of the microscopic structural features of water in the presence of reline is still lacking. We carry out extensive all-atom molecular dynamics simulations to elucidate the effect of the gradual addition of co-solvents on the microscopic arrangements of water molecules. We consider four aqueous solutions of reline, between 26.3 and 91.4 wt%. A disruption of the local hydrogen-bonded structure in water is observed upon inclusion of urea and choline chloride. The extent of deviation of the water structure from tetrahedrality is quantified using the tetrahedral order parameter (qtet). Our analyses show a monotonic increase in the structural disorder as the co-solvents are added. Increase in the qtet values are observed when highly electro-negative hetero-atoms like nitrogen, oxygen of urea and choline cations are counted as partners of the central water molecules. Further insights are drawn from the characterization of the hydrogen-bonded network in water and we observe the gradual rupturing of water-water hydrogen bonds and their subsequent replacement by the water-urea hydrogen bonds. A negligible contribution from the hydrogen bonds between water and bulky choline cations has also been found. Considering all the constituents as the hydrogen bond partners we calculate the possibility of a successful hydrogen bond formation with a central water molecule. This gives a clear picture of the underlying mechanism of water replacement by urea.
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Affiliation(s)
- Soham Sarkar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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7
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Ma J, Wang Y, Yang X, Wang B. Fast Track to Acetate-Based Ionic Liquids: Preparation, Properties and Application in Energy and Petrochemical Fields. Top Curr Chem (Cham) 2021; 379:2. [PMID: 33398607 DOI: 10.1007/s41061-020-00315-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 11/16/2020] [Indexed: 11/25/2022]
Abstract
Acetate-based ionic liquids (AcILs), as a kind of typical carboxylate-based ILs, display excellent structure tunability, non-volatility, good solubility to biomass, and favorable adsorption capacity, etc. These unique characteristics of AcILs make them important candidates for a range of applications in the field of energy and in the petrochemical industry. This paper intends to provide a comprehensive overview of recent advances in AcILs, including pure AcILs, AcIL-based multi-solvents, and AcIL-based composites, etc. Preparation methods, with one- and two-step synthesis, are reviewed. The relationship between properties and temperature is discussed, and some physical and thermodynamic properties of different AcILs are summarized and further calculated. The applications of AcILs in the fields of biomass processing, organic synthesis, separation, electrochemistry, and other fields are reviewed based on their prominent properties. Thereinto, the dual functions of AcILs as solvents and activators for biomass dissolution are discussed, and the roles of AcILs as catalysts and reaction mediums in clean organic synthesis are highlighted. Meanwhile, the reaction mechanisms of AcILs with acid gases are posed by means of molecular simulation and experimental characterization. Moreover, AcILs as electrolytes for zinc batteries, supercapacitors, and electrodeposition are particularly introduced. Finally, the future research challenges and prospects of AcILs are presented.
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Affiliation(s)
- Jing Ma
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, China
| | - Yutong Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, China
| | - Xueqing Yang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, China
| | - Baohe Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072, China. .,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, China.
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8
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Theoretical and experimental studies of ionic liquid-urea mixtures on chitosan dissolution: Effect of cationic structure. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113918] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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10
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A biophysical strategy to examine the impact of newly synthesized polymerizable ammonium-based ionic liquids on the structural stability and proteolytic activity of stem bromelain. Int J Biol Macromol 2020; 151:957-966. [DOI: 10.1016/j.ijbiomac.2019.10.208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/14/2019] [Accepted: 10/24/2019] [Indexed: 11/23/2022]
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11
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Maity A, Sarkar S, Theeyancheri L, Chakrabarti R. Choline Chloride as a Nano‐Crowder Protects HP‐36 from Urea‐Induced Denaturation: Insights from Solvent Dynamics and Protein‐Solvent Interactions. Chemphyschem 2020; 21:552-567. [DOI: 10.1002/cphc.201901078] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 01/22/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Atanu Maity
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Soham Sarkar
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Ligesh Theeyancheri
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Rajarshi Chakrabarti
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
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12
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Sindhu A, Kumar S, Mondal D, Bahadur I, Venkatesu P. Protein packaging in ionic liquid mixtures: an ecofriendly approach towards the improved stability of β-lactoglobulin in cholinium-based mixed ionic liquids. Phys Chem Chem Phys 2020; 22:14811-14821. [DOI: 10.1039/d0cp02151b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present work demonstrates a pioneering approach for the packaging of β-LG with improved stability in the presence of aqueous solutions containing cholinium-based ionic liquid mixtures.
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Affiliation(s)
| | - Sumit Kumar
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Dibyendu Mondal
- Centre for Nano & Material Science
- JAIN (deemed to be University)
- Jain Global Campus
- Bangalore-562112
- India
| | - Indra Bahadur
- Department of Chemistry, School of Physical and Chemical Sciences, Material Science Innovation & Modelling (MaSIM) Focus Area, Faculty of Natural and Agricultural Sciences
- North-West University (Mafikeng Campus)
- Private Bag X2046
- Mmabatho 2735
- South Africa
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13
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Chettiyankandy P, Chowdhuri S. Ion solvation scenario in an aqueous solution mixture of counteracting osmolytes: Urea and trimethylamine-N-oxide (TMAO). J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Kumar A, Bhakuni K, Venkatesu P. Strategic planning of proteins in ionic liquids: future solvents for the enhanced stability of proteins against multiple stresses. Phys Chem Chem Phys 2019; 21:23269-23282. [PMID: 31621726 DOI: 10.1039/c9cp04772g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ionic liquids (ILs) present a vast number of solvents capable of replacing toxic organic solvents in chemical, biotechnology and biomedical applications. ILs are inexpensive and environmentally friendly as the materials can be recycled conveniently. Chemists use a variety of cation and anion combinations to produce an IL that fits the requirements of the sustainable future through the pursuit of greener chemical processes. As such, the development of various types of ILs has been recognized as the emergence of environmentally friendly solvents to attain enhanced protein stability in vitro. The literature survey reveals that there exist a large number of scholarly articles as well as elegant reviews on protein stability in ILs. Biomolecules have adapted to antagonistic environmental stresses that normally denature proteins, and the mechanism of adaptation that protects the cellular components against denaturation involves the intracellular concentration of co-solvents. In this regard, recent experimental results distinctly demonstrated that ILs are stabilizing proteins against denaturing stresses, and their presence in the cells does not alter protein functional activities. However, a review focusing particularly on the refolding and counteracting effects of the ILs against denatured proteins by multiple stresses is still missing. This perspective unveils the studies that have been conducted to improve protein stabilities with ILs as well as the refolding and counteracting abilities of these ILs against the denatured proteins under the influence of multiple stresses. We believe that ILs can provide significant environmental and economic advantages for biochemical processes in the near future. Essentially, numerous investigations are required to allow us to further explore the stabilizing properties of ILs over proteins.
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Affiliation(s)
- Awanish Kumar
- Department of Chemistry, University of Delhi, Delhi-110 007, India.
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15
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Oprzeska-Zingrebe EA, Smiatek J. Preferential Binding of Urea to Single-Stranded DNA Structures: A Molecular Dynamics Study. Biophys J 2019; 114:1551-1562. [PMID: 29642026 DOI: 10.1016/j.bpj.2018.02.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/12/2018] [Accepted: 02/12/2018] [Indexed: 01/06/2023] Open
Abstract
In nature, a wide range of biological processes such as transcription termination and intermolecular binding depend on the formation of specific DNA secondary and tertiary structures. These structures can be both stabilized or destabilized by different cosolutes coexisting with nucleic acids in the cellular environment. In our molecular dynamics simulation study, we investigate the binding of urea at different concentrations to short 7-nucleotide single-stranded DNA structures in aqueous solution. The local concentration of urea around a native DNA hairpin in comparison to an unfolded DNA conformation is analyzed by a preferential binding model in light of the Kirkwood-Buff theory. All our findings indicate a pronounced accumulation of urea around DNA that is driven by a combination of electrostatic and dispersion interactions and accomplished by a significant replacement of hydrating water molecules. The outcomes of our study can be regarded as a first step into a deeper mechanistic understanding toward cosolute-induced effects on nucleotide structures in general.
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Affiliation(s)
| | - Jens Smiatek
- Institute for Computational Physics, University of Stuttgart, Stuttgart, Germany; Helmholtz Institute Münster: Ionics in Energy Storage, Forschungszentrum Jülich, Münster, Germany.
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16
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Fujita K. Ionic Liquids as Stabilization and Refolding Additives and Solvents for Proteins. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 168:215-226. [PMID: 30003282 DOI: 10.1007/10_2018_65] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This chapter focuses on recent advances in the use of ionic liquids as additives and solvents in protein applications. The solvent properties of ionic liquids can be tuned by the appropriate selection of cation and anion. The effects of different kinds of ionic liquids on protein stability and refolding behavior have been investigated and reported. The ionic liquid properties affect the intermolecular interactions of proteins, inducing different formations and folding behavior. These effects also vary with the concentration of ionic liquids. Although many of the associated mechanisms are not completely clear, some of this behavior may be attributed to the kosmotropicity of the ions and their Hofmeister effects. Graphical Abstract.
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Affiliation(s)
- Kyoko Fujita
- Department of Pathophysiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, Japan.
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17
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Egorova KS, Ananikov VP. Fundamental importance of ionic interactions in the liquid phase: A review of recent studies of ionic liquids in biomedical and pharmaceutical applications. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.025] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Bianco V, Pagès-Gelabert N, Coluzza I, Franzese G. How the stability of a folded protein depends on interfacial water properties and residue-residue interactions. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Sarkar S, Ghosh S, Chakrabarti R. Ammonium based stabilizers effectively counteract urea-induced denaturation in a small protein: insights from molecular dynamics simulations. RSC Adv 2017. [DOI: 10.1039/c7ra10712a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Room temperature ionic liquids (IL) and deep eutectic solvents (DES) are known to aid the conformational stability and activity of proteins and enzymes in aqueous solutions.
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Affiliation(s)
- Soham Sarkar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Soumadwip Ghosh
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Rajarshi Chakrabarti
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
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