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Szczelina R, Baczynski K, Markiewicz M, Pasenkiewicz-Gierula M. Network of lipid interconnections at the interfaces of galactolipid and phospholipid bilayers. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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2
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Lee E, Kundu A, Jeon J, Cho M. Water hydrogen-bonding structure and dynamics near lipid multibilayer surface: Molecular dynamics simulation study with direct experimental comparison. J Chem Phys 2019; 151:114705. [DOI: 10.1063/1.5120456] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Euihyun Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Achintya Kundu
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2a, 12489 Berlin, Germany
| | - Jonggu Jeon
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
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3
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Pasenkiewicz-Gierula M, Baczynski K, Markiewicz M, Murzyn K. Computer modelling studies of the bilayer/water interface. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2305-2321. [PMID: 26825705 DOI: 10.1016/j.bbamem.2016.01.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 01/18/2016] [Accepted: 01/21/2016] [Indexed: 01/24/2023]
Abstract
This review summarises high resolution studies on the interface of lamellar lipid bilayers composed of the most typical lipid molecules which constitute the lipid matrix of biomembranes. The presented results were obtained predominantly by computer modelling methods. Whenever possible, the results were compared with experimental results obtained for similar systems. The first and main section of the review is concerned with the bilayer-water interface and is divided into four subsections. The first describes the simplest case, where the interface consists only of lipid head groups and water molecules and focuses on interactions between the lipid heads and water molecules; the second describes the interface containing also mono- and divalent ions and concentrates on lipid-ion interactions; the third describes direct inter-lipid interactions. These three subsections are followed by a discussion on the network of direct and indirect inter-lipid interactions at the bilayer interface. The second section summarises recent computer simulation studies on the interactions of antibacterial membrane active compounds with various models of the bacterial outer membrane. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg.
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Affiliation(s)
- Marta Pasenkiewicz-Gierula
- Department of Computational Biophysics and Bioinformatics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
| | - Krzysztof Baczynski
- Department of Computational Biophysics and Bioinformatics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Michal Markiewicz
- Department of Computational Biophysics and Bioinformatics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Krzysztof Murzyn
- Department of Computational Biophysics and Bioinformatics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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Róg T, Murzyn K, Milhaud J, Karttunen M, Pasenkiewicz-Gierula M. Water Isotope Effect on the Phosphatidylcholine Bilayer Properties: A Molecular Dynamics Simulation Study. J Phys Chem B 2009; 113:2378-87. [DOI: 10.1021/jp8048235] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tomasz Róg
- Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada
| | - Krzysztof Murzyn
- Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada
| | - Jeannine Milhaud
- Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada
| | - Mikko Karttunen
- Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada
| | - Marta Pasenkiewicz-Gierula
- Department of Physics, Tampere University of Technology, Tampere, Finland; Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland; Laboratoire de Biophysique Moléculaire, Cellulaire et Tissulaire, UFR SMBH Université Paris 13, Paris, France; and Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada
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Botek E, Giribet C, Ruiz de Azúa M, Martín Negri R, Bernik D. Evaluation of the molecular polarizability using the IPPP-CLOPPA-INDO/S method. Application to molecules of biological interest. J Phys Chem A 2008; 112:6992-8. [PMID: 18593142 DOI: 10.1021/jp711620m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The IPPP-CLOPPA-INDO/S method is introduced to investigate the static molecular polarizability in macromolecules. As an example of application, the polarizability of phospholipidic compounds, with and without the presence of water molecules has been estimated. The IPPP technique was employed to calculate the polarizability of the polar head and the hydrocarbon chains separately to analyze the feasibility of evaluating the total polarizability of the molecule by addition of these two projected results. INDO/S dipole moments of different fragments of the complex molecule were obtained by means of localized molecular orbitals in order to evaluate the charge transfer in the system.
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Affiliation(s)
- Edith Botek
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium.
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Binder H. Water near lipid membranes as seen by infrared spectroscopy. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2006; 36:265-79. [PMID: 17089150 DOI: 10.1007/s00249-006-0110-6] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 10/02/2006] [Accepted: 10/10/2006] [Indexed: 11/26/2022]
Abstract
The ordering and H-bonding characteristics of the hydration water of the lipid 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) were studied using polarized infrared spectroscopy by varying either the temperature or the relative humidity of the ambient atmosphere of multibilayer samples. The OH-stretching band of lipid-bound water was interpreted by a simplified two-state model of well-structured, low density "network" water and of less-structured dense "multimer" water. The IR-spectroscopic data reflect a rather continuous change of the water properties with increasing distance from the membrane and with changing temperature. Network and multimer water distribute across the whole polar interphase with changing composition and orientation. Upon dehydration the fraction of network water increases from about 30 to 60%, a value which is similar to that in supercooled water at -25 degrees C. The highly ordered gel phase gives rise to an increased fraction of structured network water compared with the liquid crystalline phase. The IR order parameter shows that the water dipoles rearrange from a more parallel towards a more perpendicular orientation with respect to the membrane normal with progressive hydration.
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Affiliation(s)
- Hans Binder
- Interdisciplinary Centre for Bioinformatics, University of Leipzig, Leipzig, Germany.
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7
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Murashov V, Leszczynski J. A comparison of the B3LYP and MP2 methods in the calculation of phosphate complexes. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0166-1280(00)00524-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Binder H, Kohlstrunk B, Heerklotz HH. Hydration and Lyotropic Melting of Amphiphilic Molecules: A Thermodynamic Study Using Humidity Titration Calorimetry. J Colloid Interface Sci 1999; 220:235-249. [PMID: 10607439 DOI: 10.1006/jcis.1999.6501] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The hydration of the lipid 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) and of the cationic detergent dodecyltrimethylammonium bromide (DTAB) has been studied by means of isothermal titration calorimetry (ITC), gravimetry, and infrared (IR) spectroscopy. During the experiments films of the amphiphiles are perfused by an inert gas of variable relative humidity. The measurement of adsorption heats using ITC represents a new adaptation of adsorption calorimetry which has been called the humidity titration technique. This method yields the partial molar enthalpy of water upon adsorption. It is found to be endothermic with respect to the molar enthalpy of water on condensation for the water molecules which interact directly with the headgroups of POPC and DTAB. Consequently, the spontaneous hydration of the amphiphiles is entropy driven in an aqueous environment. IR spectroscopy shows that hydration is accompanied by the increase in the conformational and/or motional freedom of the amphiphilic molecules upon water binding. In particular, a lyotropic chain melting transition is induced at a certain characteristic relative humidity. This event is paralleled by the adsorption of water. The corresponding exothermic adsorption heat is consumed completely (POPC) or partially (DTAB) by the hydrocarbon chains upon melting. Differential scanning calorimetry was used as an independent method to determine transition enthalpies of the amphiphiles at a definite hydration degree. Water binding onto the headgroups is discussed in terms of hydrogen bonding and polar interactions. The adsorption isotherms yield a number of approximately 2.6 tightly bound water molecules per POPC and DTAB molecule. Copyright 1999 Academic Press.
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Affiliation(s)
- H Binder
- Institut für Experimentelle Physik I, Linnèstr. 5, Leipzig, D-04103, Germany
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9
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Furuike S, Levadny VG, Li SJ, Yamazaki M. Low pH induces an interdigitated gel to bilayer gel phase transition in dihexadecylphosphatidylcholine membrane. Biophys J 1999; 77:2015-23. [PMID: 10512821 PMCID: PMC1300482 DOI: 10.1016/s0006-3495(99)77042-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We have investigated the influence of pH on the structures and phase behaviors of multilamellar vesicles of the ether-linked dihexadecylphosphatidylcholine (DHPC-MLV). This phospholipid is known to be in the interdigitated gel (L(beta)I) phase in excess water at 20 degrees C at neutral pH. The results of X-ray diffraction experiments indicate that a phase transition from L(beta)I phase to the bilayer gel phase occurred in DHPC-MLV in 0.5 M KCl around pH 3.9 with a decrease in pH, and that at low pH values, less than pH 2.2, DHPC-MLVs were in L(beta') phase. The results of fluorescence and light scattering method indicate that the gel to liquid-crystalline phase transition temperature (T(m)) of DHPC-MLV increased with a decrease in pH. On the basis of a thermodynamic analysis, we conclude that the main mechanism of the low-pH induced L(beta)I to bilayer gel phase transition in DHPC-MLV and the increase in its T(m) is connected with the decrease in the repulsive interaction between the headgroups of these phospholipids. As pH decreases, the phosphate groups of the headgroups begin to be protonated, and as a result, the apparent positive surface charges appear. However, surface dipoles decrease and the interaction free energy of the hydrophilic segments with water increases. The latter effect dominates the pure electrostatic repulsion between the charged headgroups, and thereby, the total repulsive interaction in the interface decreases.
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Affiliation(s)
- S Furuike
- Material Science, Graduate School of Science and Engineering, Shizuoka University, 836 Oya, Shizuoka 422-8529, Japan
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Murashov VV, Leszczynski J. Adsorption of the Phosphate Groups on Silica Hydroxyls: An ab Initio Study. J Phys Chem A 1999. [DOI: 10.1021/jp981996r] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir V. Murashov
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jerzy Leszczynski
- Department of Chemistry, Jackson State University, Jackson, Mississippi 39217-0510
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Pasenkiewicz-Gierula M, Takaoka Y, Miyagawa H, Kitamura K, Kusumi A. Hydrogen Bonding of Water to Phosphatidylcholine in the Membrane As Studied by a Molecular Dynamics Simulation: Location, Geometry, and Lipid−Lipid Bridging via Hydrogen-Bonded Water. J Phys Chem A 1997. [DOI: 10.1021/jp962099v] [Citation(s) in RCA: 207] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marta Pasenkiewicz-Gierula
- Department of Biophysics, Institute of Molecular Biology, Jagiellonian University, Krakow, Poland, Department of Molecular Science, Research Center, Taisho Pharmaceutical Co. Ltd., Omiya, Saitama 330, Japan, and Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153, Japan
| | - Yuji Takaoka
- Department of Biophysics, Institute of Molecular Biology, Jagiellonian University, Krakow, Poland, Department of Molecular Science, Research Center, Taisho Pharmaceutical Co. Ltd., Omiya, Saitama 330, Japan, and Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153, Japan
| | - Hiroo Miyagawa
- Department of Biophysics, Institute of Molecular Biology, Jagiellonian University, Krakow, Poland, Department of Molecular Science, Research Center, Taisho Pharmaceutical Co. Ltd., Omiya, Saitama 330, Japan, and Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153, Japan
| | - Kunihiro Kitamura
- Department of Biophysics, Institute of Molecular Biology, Jagiellonian University, Krakow, Poland, Department of Molecular Science, Research Center, Taisho Pharmaceutical Co. Ltd., Omiya, Saitama 330, Japan, and Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153, Japan
| | - Akihiro Kusumi
- Department of Biophysics, Institute of Molecular Biology, Jagiellonian University, Krakow, Poland, Department of Molecular Science, Research Center, Taisho Pharmaceutical Co. Ltd., Omiya, Saitama 330, Japan, and Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153, Japan
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Stallmach F, Dietrich U, Klose G. The effect of incorporation of phosphonic acid dibutyl ester in POPC model membranes on the hydration force. Chem Phys Lipids 1994. [DOI: 10.1016/0009-3084(94)90107-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Grdadolnik J, Kidrič J, Hadži D. An FT-IR study of water hydrating dipalmitoylphosphatidylcholine multibilayers and reversed micelles. J Mol Struct 1994. [DOI: 10.1016/0022-2860(94)87024-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Shchipunov YA, Kolpakov AF. Phospholipids at the oil/water interface: adsorption and interfacial phenomena in an electric field. Adv Colloid Interface Sci 1991; 35:31-138. [PMID: 2043289 DOI: 10.1016/0001-8686(91)80020-k] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Interfacial effects produced in an immiscible liquid system by the action of an external electric field have been considered. The addition of small amounts of neutral phospholipids to the nonaqueous phase has been shown to result in a marked increase in the sensitivity of the interfacial boundary to the voltage applied, which is manifested by: (i) an accelerated decrease of the interfacial tension after the two immiscible liquid phases have been brought into contact; (ii) reduced interfacial tension, by 20-30 mN/m, at the oil/water interface at field strengths of 1-10 kV/m (the interfacial tension drop in the absence of phospholipids does not exceed 5 mN/m); (iii) development of electrohydrodynamic instability at the planar dividing surface between phases; and (iv) dispersion of water into the nonaqueous phase at smaller field strengths by a factor of about 100 as compared to those normally required in the absence of phospholipids. In order to gain a deeper insight into the mechanisms of interfacial phenomena, mainly exemplified by the n-heptane/water system containing phosphatidylcholine, three major issues have been considered: (1) Kinetics of the adsorption of phospholipid at the oil/water interface from the nonaqueous phase, and effects produced by exposure to an external electric field; also, the adsorption under equilibrium conditions, and the structure of the adsorption layer formed. (2) Interactions between neutral phospholipid and inorganic or organic ions at the interfacial boundary under the voltage applied. (3) Conditions for the occurrence of electrohydrodynamic instability at the dividing surface between oil and water and the formation of a water-in-oil emulsion; also aggregation and gelation processes induced in the nonaqueous phospholipid solution bulk by the action of a weak external electric field. Throughout the present paper, an attempt has been made to relate the microscopic behaviour of phospholipids under an external electric field to macroscopically observable properties at the movable interfacial boundaries. The adsorption studies have shown that phosphatidylcholine is prone to self-organization into a liquid-crystalline state at an immiscible liquid interface. The disintegration of the interfacial lipid film thus formed by the action of a weak electric field has been explained as due to an enhanced electrohydrodynamic instability of liquid crystals. This results in the formation of either an emulsion, or a microemulsion in the nonaqueous solution bulk. The formation of a microemulsion is manifested by the appearance of an optically anisotropic gel, stable only under an external applied electric field, in the nonaqueous solution bulk.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- Y A Shchipunov
- Institute of Chemistry, Far East Department, Academy of Sciences of the USSR, Vladivostok
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15
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Jayaram B, Mezei M, Beveridge DL. Monte Carlo study of the aqueous hydration of dimethylphosphate conformations. J Comput Chem 1987. [DOI: 10.1002/jcc.540080702] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cevc G, Marsh D. Hydration of noncharged lipid bilayer membranes. Theory and experiments with phosphatidylethanolamines. Biophys J 1985; 47:21-31. [PMID: 3978186 PMCID: PMC1435065 DOI: 10.1016/s0006-3495(85)83872-8] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Calorimetric measurements have been made on the thermodynamics of the chain-melting phase transition of saturated diacylphosphatidylethanolamines, with chains containing 12-20 carbons, as a function of water content. The transition temperature, Tt, and the transition enthalpy, and entropy all decrease with an increase in water content; however, the effect on Tt lessens with an increase in chainlength. These results are compared with a theoretical description of lipid hydration in terms of the interlamellar water polarization (i.e., modified water structure) in the interbilayer region. The measured free energy, enthalpy and entropy of the transition and the transition temperature have an approximate hyperbolic tangent dependence on water content, infinity tanh (dw/2 xi), where dw is the interlamellar water-layer thickness and xi approximately equal to 0.25 nm is the water-order correlation length, in agreement with the theory. Auxiliary x-ray diffraction experiments yield results on the repulsive hydration forces between lipid lamellae consistent with the theory, and allow an estimate of the water orienting potential of the interface. The molecular origin of this potential is discussed in electrostatic terms, and the values of its associated molecular parameters are found to yield the right size of hydrational thermodynamic quantities. The theory thus provides an integrated, clear, and simple approach to the hydration properties of lipid membranes.
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Kreissler M, Lemaire B, Bothorel P. Theoretical conformational analysis of phospholipids. II. Role of hydration in the gel to liquid crystal transition of phospholipids. BIOCHIMICA ET BIOPHYSICA ACTA 1983; 735:23-34. [PMID: 6626549 DOI: 10.1016/0005-2736(83)90257-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
To obtain a satisfactory agreement between computed transition temperatures and those determined experimentally, we introduce explicitly water molecules which hydrate the polar headgroup of dipalmitoylphosphatidylethanolamine molecules. The calculated free energy curves as a function of the intermolecular interchain distance and the degree of hydration of the polar groups permit the determination of the transition of the phospholipid system from the gel to the liquid crystalline phase. The detailed structure of the hydration shell is defined using the supermolecular approach.
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Peinel G, Frischleder H, Binder H. Quantum-chemical and empirical calculations on Phospholipids VIII. The electrostatic potential from isolated molecules up to layer systems. Chem Phys Lipids 1983. [DOI: 10.1016/0009-3084(83)90021-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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D�rfler HD, Brezesinski G. Phasenumwandlungserscheinungen in Lecithin/Wasser-Systemen. Colloid Polym Sci 1983. [DOI: 10.1007/bf01469677] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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23
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The undulations of hydrated phospholipid multilayers may be due to water-mediated bilayer-bilayer interactions. Chem Phys Lett 1981. [DOI: 10.1016/0009-2614(81)80327-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Gay R, Vanderkooi G. Hydrogen bonding of phosphodiesters to water, methanol, and methylamine as studied by the CNDO/2 method. J Chem Phys 1981. [DOI: 10.1063/1.442290] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Frischleder H. Quantum-chemical and empirical calculations on phospholipids IV. Glycero-phosphorylethanolamine in a quasihexagonal planar lattice. Chem Phys Lipids 1978. [DOI: 10.1016/0009-3084(78)90022-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Tewari R, Danyluk SS. Configurational effects on conformational properties of cyclic nucleotides. I. Theoretical calculations of conformer preferences in ?-nucleoside 3?,5? cyclic monophosphates. Biopolymers 1978. [DOI: 10.1002/bip.1978.360170507] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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