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Schneider HJ. Distinction and Quantification of Noncovalent Dispersive and Hydrophobic Effects. Molecules 2024; 29:1591. [PMID: 38611870 PMCID: PMC11013637 DOI: 10.3390/molecules29071591] [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: 03/06/2024] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 04/14/2024] Open
Abstract
The possibilities of comparing computational results of noncovalent interactions with experimental data are discussed, first with respect to intramolecular interactions. For these a variety of experimental data such as heats of formation, crystal sublimation heats, comparison with energy minimized structures, and spectroscopic data are available, but until now largely have not found widespread application. Early force field and QM/MP2 calculations have already shown that the sublimation heats of hydrocarbons can be predicted with an accuracy of ±1%. Intermolecular interactions in solution or the gas phase are always accompanied by difficult to compute entropic contributions, like all associations between molecules. Experimentally observed T∆S values contribute 10% to 80% of the total ∆G, depending on interaction mechanisms within the complexes, such as, e.g., hydrogen bonding and ion pairing. Free energies ∆G derived from equilibrium measurements in solution allow us to define binding increments ∆∆G, which are additive and transferable to a variety of supramolecular complexes. Data from more than 90 equilibrium measurements of porphyrin receptors in water indicate that small alkanes do not bind to the hydrophobic flat surfaces within a measuring limit of ∆G = ±0.5 kJ/mol, and that 20 functions bearing heteroatoms show associations by dispersive interactions with up to ∆G = 8 kJ/mol, roughly as a function of their polarizability. Aromatic systems display size-dependent affinities ∆G as a linear function of the number of π-electrons.
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Affiliation(s)
- Hans-Jörg Schneider
- FR Organische Chemie, Universität des Saarlandes, D 66123 Saarbrücken, Germany
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2
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Kong J, Li M, Chen Y, Li Y, Liu M, Zhang Q, Xuan H, Liu J. Hydrophobic interaction of four bile salts with hemoglobin induces unfolding of protein and evades protein degeneration induced by urea. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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3
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Wang Z, Li M, Wu T. Ice recrystallization inhibition activity in bile salts. J Colloid Interface Sci 2023; 629:728-738. [PMID: 36193617 DOI: 10.1016/j.jcis.2022.09.102] [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: 04/24/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022]
Abstract
Ice recrystallization inhibitors are novel cryoprotective agents that can reduce the freezing damage of cells, tissues, and organs in cryopreservation. To date, potent ice recrystallization inhibition (IRI) activity has been found on antifreeze (glyco)proteins, polymers, nanomaterials, and a limited number of chemically synthesized small molecules. This paper reports a relatively potent IRI activity on a group of small biological molecules - bile salts. The IRI activity increased as the number of hydroxyl groups decreased in bile salts. Among sodium cholate (NaC), sodium deoxycholate (NaDC), sodium chenodeoxycholate (NaCC), and sodium lithocholate (NaLC), the least hydrophilic NaLC at a concentration of 25.0 mM entirely blocked the ice growth in phosphate-buffered saline (PBS) under test conditions. The IRI activity of bile salts was not related to viscosity or gelation. No IRI activity was found below the critical micelle concentration. The IRI activity was independent of liquid crystal formation. No ice shaping and thermal hysteresis were observed on any bile salts, but NaC and NaLC could increase the ice nucleation temperature. The findings add bile salts to the existing material list of ice recrystallization inhibitors.
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Affiliation(s)
- Zhihong Wang
- Department of Food Science, The University of Tennessee, Knoxville, 2510 River Drive, TN 37996, USA
| | - Min Li
- Department of Food Science, The University of Tennessee, Knoxville, 2510 River Drive, TN 37996, USA
| | - Tao Wu
- Department of Food Science, The University of Tennessee, Knoxville, 2510 River Drive, TN 37996, USA.
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4
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dos Santos Ferreira CI, Gonzales AP, Mazzobre MF, Ulrih NP, Buera MDP. Solubility, sorption isotherms and thermodynamic parameters of β-cyclodextrin complexes with poplar propolis components: Practical implicances. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Jana R, Ahmed SA, Seth D. Interaction between Cucurbit[7]uril and Bile Salts: An Isothermal Titration Calorimetry Study. ChemistrySelect 2022. [DOI: 10.1002/slct.202103800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rabindranath Jana
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
| | - Sayeed Ashique Ahmed
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
| | - Debabrata Seth
- Department of Chemistry Indian Institute of Technology Patna Patna 801103 Bihar India
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6
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Archer WR, Gallagher CMB, Vaissier Welborn V, Schulz MD. Exploring the role of polymer hydrophobicity in polymer-metal binding thermodynamics. Phys Chem Chem Phys 2022; 24:3579-3585. [PMID: 35088772 DOI: 10.1039/d1cp05263b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Metal-chelating polymers play a key role in rare-earth element (REE) extraction and separation processes. Often, these processes occur in aqueous solution, but the interactions among water, polymer, and REE are largely under-investigated in these applications. To probe these interactions, we synthesized a series of poly(amino acid acrylamide)s with systematically varied hydrophobicity around a consistent chelating group (carboxylate). We then measured the ΔH of Eu3+ chelation as a function of temperature across the polymer series using isothermal titration calorimetry (ITC) to give the change in heat capacity (ΔCP). We observed an order of magnitude variation in ΔCP (39-471 J mol1 K-1) with changes in the hydrophobicity of the polymer. Atomistic simulations of the polymer-metal-water interactions revealed greater Eu3+ and polymer desolvation when binding to the more hydrophobic polymers. These combined experimental and computational results demonstrate that metal binding in aqueous solution can be modulated not only by directly modifying the chelating groups, but also by altering the molecular environment around the chelating site, thus suggesting a new design principle for developing increasingly effective metal-chelating materials.
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Affiliation(s)
- William R Archer
- Department of Chemistry, Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, VA 24060, USA.
| | - Connor M B Gallagher
- Department of Chemistry, Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, VA 24060, USA.
| | - V Vaissier Welborn
- Department of Chemistry, Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, VA 24060, USA.
| | - Michael D Schulz
- Department of Chemistry, Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, VA 24060, USA.
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Abstract
Due to their unique structural, physical and chemical properties, cyclodextrins and their derivatives have been of great interest to scientists and researchers in both academia and industry for over a century. Many of the industrial applications of cyclodextrins have arisen from their ability to encapsulate, either partially or fully, other molecules, especially organic compounds. Cyclodextrins are non-toxic oligopolymers of glucose that help to increase the solubility of organic compounds with poor aqueous solubility, can mask odors from foul-smelling compounds, and have been widely studied in the area of drug delivery. In this review, we explore the structural and chemical properties of cyclodextrins that give rise to this encapsulation (i.e., the formation of inclusion complexes) ability. This review is unique from others written on this subject because it provides powerful insights into factors that affect cyclodextrin encapsulation. It also examines these insights in great detail. Later, we provide an overview of some industrial applications of cyclodextrins, while emphasizing the role of encapsulation in these applications. We strongly believe that cyclodextrins will continue to garner interest from scientists for many years to come, and that novel applications of cyclodextrins have yet to be discovered.
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Falconer RJ, Schuur B, Mittermaier AK. Applications of isothermal titration calorimetry in pure and applied research from 2016 to 2020. J Mol Recognit 2021; 34:e2901. [PMID: 33975380 DOI: 10.1002/jmr.2901] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/02/2021] [Accepted: 04/26/2021] [Indexed: 02/06/2023]
Abstract
The last 5 years have seen a series of advances in the application of isothermal titration microcalorimetry (ITC) and interpretation of ITC data. ITC has played an invaluable role in understanding multiprotein complex formation including proteolysis-targeting chimeras (PROTACS), and mitochondrial autophagy receptor Nix interaction with LC3 and GABARAP. It has also helped elucidate complex allosteric communication in protein complexes like trp RNA-binding attenuation protein (TRAP) complex. Advances in kinetics analysis have enabled the calculation of kinetic rate constants from pre-existing ITC data sets. Diverse strategies have also been developed to study enzyme kinetics and enzyme-inhibitor interactions. ITC has also been applied to study small molecule solvent and solute interactions involved in extraction, separation, and purification applications including liquid-liquid separation and extractive distillation. Diverse applications of ITC have been developed from the analysis of protein instability at different temperatures, determination of enzyme kinetics in suspensions of living cells to the adsorption of uremic toxins from aqueous streams.
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Affiliation(s)
- Robert J Falconer
- School of Chemical Engineering & Advanced Materials, University of Adelaide, Adelaide, South Australia, Australia
| | - Boelo Schuur
- Faculty of Science and Technology, University of Twente, Enschede, Netherlands
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9
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Hossen T, Sahu K. Contrasting pKa shift and fluorescence modulation of 6-cyano-2-naphthol within α- and β-cyclodextrin. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Singh K, Chauhan S. Study on aggregation properties and interactive nature of bile salts in the presence of drugs: a comparative approach. Chem Ind 2020. [DOI: 10.1080/00194506.2020.1820911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kuldeep Singh
- Department of Chemistry, Himachal Pradesh University, Shimla, India
| | - Suvarcha Chauhan
- Department of Chemistry, Himachal Pradesh University, Shimla, India
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11
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A spectroscopic deciphering of the differential interaction behavior of alkaloid drugs with native B-DNA and protonated DNA. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113426] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Nandy A, Pramanik U, Mahato P, Shekhar S, Paul BK, Mukherjee S. Contrasting Thermodynamics Governs the Interaction of 3-Hydroxyflavone with the N-Isoform and B-Isoform of Human Serum Albumin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8570-8579. [PMID: 32600049 DOI: 10.1021/acs.langmuir.0c01362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein we report the interaction of 3-hydroxyflavone (3HF) with various isomeric forms of Human Serum Albumin (HSA), namely, the N-isoform (or native HSA at pH 7.4) and the B-isoform (at pH 9.2). Spectroscopic signatures of 3HF reveal that the interaction of 3HF with the N-isoform of HSA results in significant lowering of absorbance of the neutral species (λabs ∼ 345 nm) with concomitant increase of the anionic species (λabs ∼ 416 nm) whereas interaction with the B-isoform of HSA leads to selective enhancement of absorbance of the anionic species. The fluorescence profile of 3HF displays marked increase of intensity of the proton transferred tautomer (λem ∼ 538 nm) as well as the anionic species (λem ∼ 501 nm) for both the forms of the protein. However, analyses of the associated thermodynamics through temperature-dependent isothermal titration calorimetric (ITC) indicate that the interaction of 3HF with the N-isoform of HSA is more enthalpic in the lower temperature limit while the entropy contribution predominates in the higher temperature limit. Consequently, the 3HF-HSA (N-isoform at pH 7.4) interaction reveals an unusual thermodynamic signature of a positive heat capacity change (ΔCp = 3.84 kJ mol-1K-1) suggesting the instrumental role of hydrophobic hydration. On the contrary, the 3HF-HSA (B-isoform at pH 9.2) interaction shows qualitatively reverse effect. Consequently, the interaction is found to be characterized by an enthalpy-dominated hydrophobic effect (negative heat capacity change, ΔCp = -1.15 kJ mol-1K-1) which is rationalized on the basis of the nonclassical hydrophobic effect.
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Affiliation(s)
- Atanu Nandy
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Ushasi Pramanik
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Paritosh Mahato
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Shashi Shekhar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Bijan K Paul
- Department of Chemistry, Mahadevananda Mahavidyalaya, Barrackpore, Kolkata 700120, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
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Gómez-Velasco H, Rojo-Domínguez A, García-Hernández E. Enthalpically-driven ligand recognition and cavity solvation of bovine odorant binding protein. Biophys Chem 2020; 257:106315. [DOI: 10.1016/j.bpc.2019.106315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/05/2019] [Accepted: 12/08/2019] [Indexed: 11/29/2022]
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14
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Hossen T, Sahu K. Effect of Photoacid Strength on Fluorescence Modulation of 2-Naphthol Derivatives inside β-Cyclodextrin Cavity: Insights from Fluorescence, Isothermal Calorimetry, and Molecular Dynamics Simulations. J Phys Chem B 2019; 123:9291-9301. [PMID: 31596595 DOI: 10.1021/acs.jpcb.9b05457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fluorescence response of a photoacid inside a confined environment often differs markedly from the bulk response. Is there any correlation between the extent of fluorescence modulation and the strength of the photoacid? Here, we used three photoacids: 2-naphthol (2OH, pKa* = 3.3), 6-sulfonate-2-naphthol (6SO3-2OH, pKa* = 3.06), and 6-cyano-2-naphthol (6CN-2OH, pKa* = 0.6) with remarkably different excited-state acidities to investigate fluorescence modulation inside the nanocavity of β-cyclodextrin (β-CD). Interestingly, we found strong fluorescence modulation for 2OH and 6SO3-2OH but almost none for 6CN-2OH. Isothermal calorimetry measurements showed that all three fluorophores form 1:1 inclusion complex with comparable binding constants (285, 420, and 580 M-1 for 2OH, 6SO3-2OH, and 6CN-2OH, respectively). Molecular dynamics simulation further revealed that binding modes are quite similar, and the distribution of water molecules around the proton-donating hydroxyl group of the photoacids are also comparable. Consequently, the difference in the fluorescence response should be accounted solely to the difference in the photoacidity strengths.
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Affiliation(s)
- Tousif Hossen
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
| | - Kalyanasis Sahu
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
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15
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Ganguly A, Das S. Compaction-induced strengthening of intercalation within RNA double helices at high ionic strength of the medium: Spectral elucidation and anomalous thermodynamics. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Pigliacelli C, Belton P, Wilde P, Qi S. Probing the molecular interactions between pharmaceutical polymeric carriers and bile salts in simulated gastrointestinal fluids using NMR spectroscopy. J Colloid Interface Sci 2019; 551:147-154. [PMID: 31075629 DOI: 10.1016/j.jcis.2019.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/29/2019] [Accepted: 05/01/2019] [Indexed: 02/04/2023]
Abstract
The number of poorly soluble new drugs is increasing and one of the effective ways to deliver such pharmaceutically active molecules is using hydrophilic polymers to form a solid dispersion. Bile salts play an important role in the solubilisation of poorly soluble compounds in the gastrointestinal tract (gut) prior to absorption. When a poorly water-soluble drug is delivered using a hydrophilic polymer based solid dispersion oral formulation, it is still unclear whether there are any polymer-bile salt interactions, which may influence the drug dissolution and solubilisation. This study, using two widely used hydrophilic model polymers, Hydroxypropyl methylcellulose (HPMC) and polyvynilpirrolidone (PVP), and sodium taurocholate (NaTC) as the model bile salt, aims to investigate the interactions between the polymers and bile salts in simulated fed state (FeSSIF) and fasted state (FaSSIF) gut fluids. The nature of the interactions was characterised using a range of NMR techniques. The results revealed that the aggregation behaviour of NaTC in FaSSIF and FeSSIF is much more complex than in water. The addition of hydrophilic polymers led to the occurrences of NaTC-HPMC and NaTC-PVP aggregation. For both systems, pH and ionic strength strongly influenced the aggregation behavior, while the ion type played a less significant role. The outcome of this study enriched the understanding of the aggregation behaviour of bile salts and typical hydrophilic pharmaceutical polymers in bio-relevant media. Due to the high surface-activity of the bile salts and their ability to interact with polymers, such aggregation behaviour is expected to play a role in drug solubilisation in the gut when the drug is delivered by hydrophilic polymer based dispersions.
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Affiliation(s)
| | - Peter Belton
- School of Chemistry, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK
| | - Peter Wilde
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk NR4 7UA, UK
| | - Sheng Qi
- School of Pharmacy, University of East Anglia, Norwich, Norfolk NR4 7TJ, UK.
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17
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Binding of norharmane with RNA reveals two thermodynamically different binding modes with opposing heat capacity changes. J Colloid Interface Sci 2019; 538:587-596. [DOI: 10.1016/j.jcis.2018.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/26/2018] [Accepted: 12/03/2018] [Indexed: 02/01/2023]
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18
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Abstract
Quantification of noncovalent interactions is the key for the understanding of binding mechanisms, of biological systems, for the design of drugs, their delivery and for the design of receptors for separations, sensors, actuators, or smart materials.
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Affiliation(s)
- Teresa L. Mako
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Joan M. Racicot
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
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20
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Fernandez-Alvarez R, Medoš Ž, Tošner Z, Zhigunov A, Uchman M, Hervø-Hansen S, Lund M, Bešter-Rogač M, Matějíček P. Total Description of Intrinsic Amphiphile Aggregation: Calorimetry Study and Molecular Probing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14448-14457. [PMID: 30343575 DOI: 10.1021/acs.langmuir.8b03462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Isothermal titration calorimetry (ITC) is an apt tool for a total thermodynamic description of self-assembly of atypical amphiphiles such as anionic boron cluster compounds (COSAN) in water. Global fitting of ITC enthalpograms reveals remarkable features that differentiate COSAN from classical amphiphiles: (i) strong enthalpy and weak entropy contribution to the free energy of aggregation, (ii) low degree of counterion binding, and (iii) very low aggregation number, leading to deviations from the ideal closed association model. The counterion condensation obtained from the thermodynamic model was compared with the results of 7Li DOSY NMR of Li[COSAN] micelles, which allows direct tracking of Li cations. The basic thermodynamic study of COSAN alkaline salt aggregation was complemented by NMR and ITC experiments in dilute Li/NaCl and acetonitrile aqueous solutions of COSAN. The strong affinity of acetonitrile molecules to COSAN clusters was microscopically investigated by all-atomic molecular dynamics simulations. The impact of ionic strength on COSAN self-assembling was comparable to the behavior of classical amphiphiles, whereas even a small amount of acetonitrile cosolvent has a pronounced nonclassical character of COSAN aggregation. It demonstrates that large self-assembling changes are triggered by traces of organic solvents.
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Affiliation(s)
| | - Žiga Medoš
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
| | | | - Alexander Zhigunov
- Institute of Macromolecular Chemistry, v.v.i. , Academy of Sciences of the Czech Republic , Heyrovský Sq. 2 , 16206 Prague 6 , Czechia
| | | | - Stefan Hervø-Hansen
- Division of Theoretical Chemistry , University of Lund , P.O. Box 124, SE-22100 Lund , Sweden
| | - Mikael Lund
- Division of Theoretical Chemistry , University of Lund , P.O. Box 124, SE-22100 Lund , Sweden
| | - Marija Bešter-Rogač
- Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , SI-1000 Ljubljana , Slovenia
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Paul BK, Ghosh N, Mukherjee S. Association and sequestered dissociation of an anticancer drug from liposome membrane: Role of hydrophobic hydration. Colloids Surf B Biointerfaces 2018; 170:36-44. [PMID: 29864652 DOI: 10.1016/j.colsurfb.2018.05.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/23/2018] [Accepted: 05/29/2018] [Indexed: 01/31/2023]
Abstract
Herein, the interaction of a potent anticancer drug (Sanguinarine, SG) with dimyristoyl-l-α-phosphatidylglycerol (DMPG) liposome membrane has been investigated at physiological pH. The spectroscopic fluorescence decay results demonstrate a modification of the photophysics of SG within DMPG-encapsulated state leading to preferential stabilization of the iminium ion over the alkanolamine form. This suggests a key role of electrostatic force underlying the interaction. The complex dependence of the thermodynamic parameters on temperature yields a unique finding of a positive heat capacity change (ΔCp) indicating the signature of hydrophobic hydration. The study also demonstrates the application of β-cyclodextrin (βCD) as a prospective host system resulting in release of the DMPG-bound drug. A calorimetric exploration of the DMPG-βCD interaction reveals an intrinsically complex thermodynamics of the process leading to ΔCp > 0 and thus marking the instrumental role of hydrophobic hydration which follows that the DMPG-βCD interaction is accompanied with burial of polar molecular surfaces. A systematic investigation of the diffusion of the drug within various microheterogeneous environments by Fluorescence Correlation Spectroscopy (FCS) categorically reinforces our arguments.
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Affiliation(s)
- Bijan K Paul
- Department of Chemistry, Mahadevananda Mahavidyalaya, Barrackpore, Kolkata 700120, West Bengal, India
| | - Narayani Ghosh
- Department of General Science and Humanities, Modern Institute of Engineering and Technology, Bandel, Kolkata 712123, West Bengal, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India.
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Fernandez-Alvarez R, Ďorďovič V, Uchman M, Matějíček P. Amphiphiles without Head-and-Tail Design: Nanostructures Based on the Self-Assembly of Anionic Boron Cluster Compounds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3541-3554. [PMID: 29144761 DOI: 10.1021/acs.langmuir.7b03306] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Anionic boron cluster compounds (ABCCs) are intrinsically amphiphilic building blocks suitable for nanochemistry. ABCCs are involved in atypical weak interactions, notably dihydrogen bonding, due to their peculiar polyhedral structure, consisting of negatively charged B-H units. The most striking feature of ABCCs that differentiates them from typical surfactants is the lack of head-and-tail structure. Furthermore, their structure can be described as intrinsically amphiphilic or aquaneutral. Therefore, classical terms established to describe self-assembly of classical amphiphiles are insufficient and need to be reconsidered. The opinions and theories focused on the solution behavior of ABCCs are briefly discussed. Moreover, a comparison between ABCCs with other amphiphilic systems is made focusing on the explanation of enthalpy-driven micellization or relations between hydrophobic and chaotropic effects. Despite the unusual structure, ABCCs still show self- and coassembly properties comparable to classical amphiphiles such as ionic surfactants. They self-assemble into micelles in water according to the closed association model. The most typical features of ABCCs solution behavior is demonstrated on calorimetry, NMR spectroscopy, and tensiometry experiments. Altogether, the unique features of ABCCs makes them a valuable inclusion into the nanochemisty toolbox to develop novel nanostructures both alone and with other molecules.
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Affiliation(s)
- Roberto Fernandez-Alvarez
- Department of Physical and Macromolecular Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague 2 , Czechia
| | - Vladimír Ďorďovič
- Department of Physical and Macromolecular Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague 2 , Czechia
| | - Mariusz Uchman
- Department of Physical and Macromolecular Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague 2 , Czechia
| | - Pavel Matějíček
- Department of Physical and Macromolecular Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague 2 , Czechia
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Differential interaction behaviors of an alkaloid drug with DMPG liposome membrane as a function of the phase state of the lipid: Nonionic surfactant-induced solubilization of the lipid. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.152] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Gharat PM, Maity DK, Pal H, Dutta Choudhury S. Inhibition of the prototropic tautomerism in chrysazine by p-sulfonatocalixarene hosts. Org Biomol Chem 2018; 16:5178-5187. [DOI: 10.1039/c8ob00978c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This study reveals the unusual inhibition of excited-state prototropic tautomerism of Chrysazine by p-sulfonatocalix[4,6]arene hosts.
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Affiliation(s)
- Poojan Milan Gharat
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Dilip Kumar Maity
- Homi Bhabha National Institute
- Training School Complex
- Mumbai 400094
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
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25
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Wei G, Venkataraman S, Yang YY, Hedrick JL, Prabhu VM. Enthalpy-driven micellization of oligocarbonate-fluorene end-functionalized Poly(ethylene glycol). POLYMER 2018. [DOI: 10.1016/j.polymer.2017.11.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Wei G, Venkataraman S, Yang YY, Hedrick JL, Prabhu VM. Enthalpy-driven micellization of oligocarbonate-fluorene end-functionalized Poly(ethylene glycol) ☆. Macromolecules 2018; 134:https://doi.org/10.1016/j.polymer.2017.11.057. [PMID: 33208982 PMCID: PMC7670547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A fluorescent pyrene probe method was applied to measure the critical micelle concentration (CMC) of oligocarbonate-fluorene end-functionalized poly(ethylene glycol) (FmE445Fm) triblock copolymers in water. The CMC decreases with lower temperature and higher values of the hydrophobic block length, m. When analyzed by a closed-assembly micelle model, the estimated energetic parameters find a negative ΔH°mic and small positive ΔS°mic suggestive of enthalpy-driven micellization, which differs from entropy-driven oxyethylene/oxybutylene triblock copolymers and octaethylene glycol-n-alkyl ethers. The enthalpy-driven micellization of FmE445Fm may result from the limited hydration of individual hydrophobic F blocks that leads to few hydrogen-bonded waters released during F block association. The π-π stacking oligocarbonate-fluorene system also observed enthalpy-entropy compensation when compared to a series of published data on diblock and triblock copolymer systems. An anomalously low partition equilibrium constant for m = 15.3 implies a tightly-packed core that excludes pyrene intercalation into the fluorene core. This is discussed along with the possible limited applicability to estimate the CMC and potential model drug molecule insertions into the intercalated micelle core.
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Affiliation(s)
- Guangmin Wei
- Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, United States
| | - Shrinivas Venkataraman
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - James L. Hedrick
- IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, United States
| | - Vivek M. Prabhu
- Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, United States
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27
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Uchman M, Abrikosov AI, Lepšík M, Lund M, Matějíček P. Nonclassical Hydrophobic Effect in Micellization: Molecular Arrangement of Non-Amphiphilic Structures. ADVANCED THEORY AND SIMULATIONS 2017. [DOI: 10.1002/adts.201700002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mariusz Uchman
- Department of Physical and Macromolecular Chemistry; Faculty of Science; Charles University; Prague 2 Czech Republic
| | - Alexei I. Abrikosov
- Division of Physical Chemistry; University of Lund; Lund Sweden
- Materials Modeling and Development Laboratory; National University of Science and Technology ‘MISIS’; Moscow Russia
| | - Martin Lepšík
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague 6 Czech Republic
| | - Mikael Lund
- Division of Theoretical Chemistry; University of Lund; Lund Sweden
| | - Pavel Matějíček
- Department of Physical and Macromolecular Chemistry; Faculty of Science; Charles University; Prague 2 Czech Republic
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28
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Heřmánková E, Žák A, Poláková L, Hobzová R, Hromádka R, Širc J. Polymeric bile acid sequestrants: Review of design, in vitro binding activities, and hypocholesterolemic effects. Eur J Med Chem 2017; 144:300-317. [PMID: 29275230 DOI: 10.1016/j.ejmech.2017.12.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 01/06/2023]
Abstract
Polymeric bile acid sequestrants (BAS) have recently attracted much attention as lipid-lowering agents. These non-absorbable materials specifically bind bile acids (BAs) in the intestine, preventing bile acid (BA) reabsorption into the blood through enterohepatic circulation. Therefore, it is important to understand the structure-property relationships between the polymer sequestrant and its ability to bind specific BAs molecules. In this review, we describe pleiotropic effects of bile acids, and we focus on BAS with various molecular architectures that result in different mechanisms of BA sequestration. Here, we present 1) amphiphilic polymers based on poly(meth)acrylates, poly(meth)acrylamides, polyalkylamines and polyallylamines containing quaternary ammonium groups, 2) cyclodextrins, and 3) BAS prepared via molecular imprinting methods. The synthetic approaches leading to individual BAS preparation, as well as results of their in vitro BA binding activities and in vivo lipid-lowering activities, are discussed.
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Affiliation(s)
- Eva Heřmánková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Aleš Žák
- 4th Department of Medicine, First Faculty of Medicine, Charles University, U Nemocnice 2, CZ-128 08 Prague, Czech Republic.
| | - Lenka Poláková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Radka Hobzová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
| | - Róbert Hromádka
- Research and Development Center, C2P s.r.o. Chlumec nad Cidlinou, Czech Republic.
| | - Jakub Širc
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky sq. 2, CZ-162 06 Prague, Czech Republic.
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29
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Paul BK, Guchhait N, Bhattacharya SC. Binding of ciprofloxacin to bovine serum albumin: Photophysical and thermodynamic aspects. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 172:11-19. [DOI: 10.1016/j.jphotobiol.2017.04.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 04/24/2017] [Indexed: 12/15/2022]
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30
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Dang P, Ye R, Meng F, Han Y, Zhou Y, Gong X, Zhou B. Microencapsulation thermodynamics of methylated β-cyclodextrins with bile salt: enthalpy, entropy, and solvent effect. J INCL PHENOM MACRO 2017. [DOI: 10.1007/s10847-017-0716-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Martín VI, Angulo M, López-Cornejo P, López-López M, Marchena MJ, Moyá ML. Stoppering/unstoppering of a rotaxane formed between an N-hetorycle ligand containing surfactant: β-cyclodextrin pseudorotaxane and pentacyanoferrate(II) ions. J Colloid Interface Sci 2017; 497:343-349. [PMID: 28288380 DOI: 10.1016/j.jcis.2017.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 02/20/2017] [Accepted: 03/02/2017] [Indexed: 01/05/2023]
Abstract
The assembly of a surfactant-based rotaxane by adding the labile aquopentacyanoferrate(II) ion to the previously formed pseudorotaxane between the surfactant 11-(isonicotinoyloxy)-N,N,N-triethyl-1-undecanaminium bromide and β-cyclodextrin was investigated by 1H NMR and kinetic measurements. NMR spectroscopy has showed that the rotaxane can be formed through two different mechanisms. The rotaxane can be unstoppered by using the pyridine ligand substitution reaction by the high-field cyanide ligand. In this work a new method is developed for the preparation of several new surfactant-based rotaxanes by changing the hydrophilic and hydrophobic regions of the surfactants and the nature of the macrocycle.
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Affiliation(s)
- Victoria I Martín
- Department of Physical Chemistry, University of Seville, C/ Profesor García González 1, 41012 Seville, Spain
| | - Manuel Angulo
- NMR Service, University of Seville, Apartado 1203, E-41071 Seville, Spain
| | - Pilar López-Cornejo
- Department of Physical Chemistry, University of Seville, C/ Profesor García González 1, 41012 Seville, Spain
| | - Manuel López-López
- Department of Chemical Engineering, Physical Chemistry and Material Science, Faculty of Experimental Sciences, Campus El Carmen, Avda. de las Fuerzas Armadas s/n, 21071 Huelva, Spain
| | - María José Marchena
- Department of Physical Chemistry, University of Seville, C/ Profesor García González 1, 41012 Seville, Spain
| | - María Luisa Moyá
- Department of Physical Chemistry, University of Seville, C/ Profesor García González 1, 41012 Seville, Spain.
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32
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Xie H, Lu W, Wang J, Wang W. pH responsive vesicles with tunable size formed by single-tailed surfactants with a dendritic headgroup. RSC Adv 2017. [DOI: 10.1039/c7ra02548c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Vesicles of variable sizes are obtained by changing pH with single-tailed dendritic surfactants.
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Affiliation(s)
- Hongtao Xie
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education
- Xinjiang Uygur Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi
| | - Wensheng Lu
- Institute of Chemistry
- Chinese Academy of Sciences (ICCAS)
- Beijing 100190
- China
| | - Jide Wang
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education
- Xinjiang Uygur Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi
| | - Wei Wang
- Key Laboratory of Oil and Gas Fine Chemicals
- Ministry of Education
- Xinjiang Uygur Autonomous Region
- College of Chemistry and Chemical Engineering of Xinjiang University
- Urumqi
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33
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Paul P, Mati SS, Bhattacharya SC, Kumar GS. Exploring the interaction of phenothiazinium dyes methylene blue, new methylene blue, azure A and azure B with tRNAPhe: spectroscopic, thermodynamic, voltammetric and molecular modeling approach. Phys Chem Chem Phys 2017; 19:6636-6653. [DOI: 10.1039/c6cp07888e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
RNA targeting by small molecules.
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Affiliation(s)
- Puja Paul
- Biophysical Chemistry Laboratory
- Organic and Medicinal Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | | | | | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory
- Organic and Medicinal Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
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