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Meikle TG, Keizer DW, Separovic F, Yao S. Insights into dynamic properties of water in lipidic cubic phases by 2D nuclear Overhauser effect (NOE) NMR spectroscopy. J Colloid Interface Sci 2024; 666:659-669. [PMID: 38616448 DOI: 10.1016/j.jcis.2024.04.054] [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: 01/25/2024] [Revised: 04/03/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
Two-dimensional NOE (nuclear Overhauser effect) NMR spectroscopy was employed to investigate the dynamic properties of water within lyotropic bicontinuous lipidic cubic phases (LCPs) formed by monoolein (MO). Experiments observed categorically different effective residence times of water molecules: (i) in proximity to the glycerol moiety of MO, and (ii) adjacent to the hydrophobic chain towards the hydrocarbon tail of MO, as evidenced by the opposite signs of intermolecular NOE cross peaks between protons of water and those of MO in 2D 1H-1H NOESY spectra. Spectroscopic data delineating the different effective residence times of water molecules within both the gyroid (QIIG) and diamond (QIID) phase groups corresponding to hydration levels of 35 and 40 wt%, respectively, are presented. Additionally, an increase in effective residence time of water molecules in proximity to the glycerol moiety of MO in LCPs was observed upon storage at ambient temperature and in the presence of an additive lipid, cholesterol. Atom-specific NOE build-up curves for protons of water and those of MO are also given. The results presented herein provide new insight into the physicochemical properties and behaviour of water in LCPs, and demonstrate an additional avenue for experimental study of water-lipid interactions and hydration dynamics in model membranes and nanomaterials using 2D NOE NMR spectroscopy.
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Affiliation(s)
- Thomas G Meikle
- Baker Heart and Diabetes Institute, Melbourne, VIC 3004, Australia
| | - David W Keizer
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, VIC 3010, Australia
| | - Frances Separovic
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, VIC 3010, Australia; School of Chemistry, The University of Melbourne, VIC 3010, Australia
| | - Shenggen Yao
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, VIC 3010, Australia.
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Paschek D, Busch J, Mock E, Ludwig R, Strate A. Computing the frequency-dependent NMR relaxation of 1H nuclei in liquid water. J Chem Phys 2024; 160:074102. [PMID: 38364003 DOI: 10.1063/5.0191052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
We present a computational framework for reliably determining the frequency-dependent intermolecular and intramolecular nuclear magnetic resonance (NMR) dipole-dipole relaxation rates of spin 1/2 nuclei from Molecular Dynamics (MD) simulations. This approach avoids the alterations caused by the well-known finite-size effects of translational diffusion. Moreover, a procedure is derived to control and correct for effects caused by fixed distance-sampling cutoffs and periodic boundary conditions. By construction, this approach is capable of accurately predicting the correct low-frequency scaling behavior of the intermolecular NMR dipole-dipole relaxation rate and thus allows for the reliable calculation of the frequency-dependent relaxation rate over many orders of magnitude. Our approach is based on the utilization of the theory of Hwang and Freed for the intermolecular dipole-dipole correlation function and its corresponding spectral density [L.-P. Hwang and J. H. Freed, J. Chem. Phys. 63, 4017-4025 (1975)] and its combination with data from MD simulations. The deviations from the Hwang and Freed theory caused by periodic boundary conditions and sampling distance cutoffs are quantified by means of random walker Monte Carlo simulations. An expression based on the Hwang and Freed theory is also suggested for correcting those effects. As a proof of principle, our approach is demonstrated by computing the frequency-dependent intermolecular and intramolecular dipolar NMR relaxation rates of 1H nuclei in liquid water at 273 and 298 K based on the simulations of the TIP4P/2005 model. Our calculations are suggesting that the intermolecular contribution to the 1H NMR relaxation rate of the TIP4P/2005 model in the extreme narrowing limit has previously been substantially underestimated.
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Affiliation(s)
- Dietmar Paschek
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, D-18059 Rostock, Germany
| | - Johanna Busch
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, D-18059 Rostock, Germany
| | - Eduard Mock
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, D-18059 Rostock, Germany
| | - Ralf Ludwig
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, D-18059 Rostock, Germany
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
- Department Life, Light & Matter, Universität Rostock, Albert-Einstein-Str. 25, D-18059 Rostock, Germany
| | - Anne Strate
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, D-18059 Rostock, Germany
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Epasto LM, Honegger P, Che K, Kozak F, Jörg F, Schröder C, Kurzbach D. Nuclear Overhauser spectroscopy in hyperpolarized water - chemical vs. magnetic exchange. Chem Commun (Camb) 2022; 58:11661-11664. [PMID: 36169286 PMCID: PMC9578288 DOI: 10.1039/d2cc03735a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dissolution dynamic nuclear polarization (dDNP) is a versatile hyperpolarization technique to boost signal intensities in nuclear magnetic resonance (NMR) spectroscopy. The possibility to dissolve biomolecules in a hyperpolarized aqueous buffer under mild conditions has recently widened the scope of NMR by dDNP. The water-to-target hyperpolarization transfer mechanisms remain yet unclear, not least due to an often-encountered dilemma of dDNP experiments: The strongly enhanced signal intensities are accompanied by limited structural information as data acquisition is restricted to short time series of only one-dimensional spectra or a single correlation spectrum. Tackling this challenge, we combine dDNP with molecular dynamics (MD) simulations and predictions of cross-relaxation rates to unravel the spin dynamics of magnetization flow in hyperpolarized solutions. How to boost NMR signals of non-labile protons in hyperpolarized solutions.![]()
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Affiliation(s)
- Ludovica Martina Epasto
- University of Vienna, Faculty of Chemistry, Department of Biological Chemistry, Währingerstr. 38, 1090 Vienna, Austria. .,University of Vienna, Doctoral School in Chemistry (DoSChem), Währingerstr. 42, 1090 Vienna, Austria
| | - Philipp Honegger
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstr. 17, 1090 Vienna, Austria.,Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA
| | - Kateryna Che
- University of Vienna, Faculty of Chemistry, Department of Biological Chemistry, Währingerstr. 38, 1090 Vienna, Austria.
| | - Fanny Kozak
- University of Vienna, Faculty of Chemistry, Department of Biological Chemistry, Währingerstr. 38, 1090 Vienna, Austria. .,University of Vienna, Doctoral School in Chemistry (DoSChem), Währingerstr. 42, 1090 Vienna, Austria
| | - Florian Jörg
- University of Vienna, Doctoral School in Chemistry (DoSChem), Währingerstr. 42, 1090 Vienna, Austria.,University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstr. 17, 1090 Vienna, Austria
| | - Christian Schröder
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, Währingerstr. 17, 1090 Vienna, Austria
| | - Dennis Kurzbach
- University of Vienna, Faculty of Chemistry, Department of Biological Chemistry, Währingerstr. 38, 1090 Vienna, Austria.
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Szabadi A, Schröder C. Recent Developments in Polarizable Molecular Dynamics Simulations of Electrolyte Solutions. JOURNAL OF COMPUTATIONAL BIOPHYSICS AND CHEMISTRY 2022. [DOI: 10.1142/s2737416521420035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Polarizable molecular dynamics simulations are a fast progressing field in the scientific research of ionic liquids. The fundamentals of polarizable simulations, as well as their application to ionic liquids, were summarized in a review [Bedrov, D.; Piquemal, J.-P.; Borodin, O.; MacKerell, Jr., A. D.; Roux, B.; Schröder, C. Molecular Dynamics Simulations of Ionic Liquids and Electrolytes Using Polarizable Force Fields. Chem. Rev. 2019, 119, 7940–7995] in 2019. Since then, new methods to treat intermolecular interaction of induced dipoles in these highly charged systems were developed. This concerns the damping of these interactions and additional charge transfer as well as the prediction of ionic materials with ultrahigh refractive indices. In addition to the progress of the polarizable force fields, also thermostats and barostats for polarizable simulations evolved recently.
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Affiliation(s)
- András Szabadi
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, A-1090 Vienna, Austria
| | - Christian Schröder
- University of Vienna, Faculty of Chemistry, Department of Computational Biological Chemistry, A-1090 Vienna, Austria
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Ghirardello M, Costantini M, Vecchi A, Pacifico S, Pazzi D, Castiglione F, Mele A, Marra A. Synthesis of Chiral Ionic Liquids from Natural Monosaccharides. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mattia Ghirardello
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Maira Costantini
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Alessandra Vecchi
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Salvatore Pacifico
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Daniele Pazzi
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Franca Castiglione
- Department of Chemistry Materials and Chemical Engineering “G. Natta“ Politecnico di Milano Piazza L. da Vinci 32 20133 Milano Italy
| | - Andrea Mele
- Department of Chemistry Materials and Chemical Engineering “G. Natta“ Politecnico di Milano Piazza L. da Vinci 32 20133 Milano Italy
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM - UMR 5247) Université de Montpellier Pôle Chimie Balard Recherche 1919 Route de Mende 34293 Montpellier cedex 5 France
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