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Yu H, Yzeiri I, Hou B, Chen CH, Bu W, Vanysek P, Chen YS, Lin B, Král P, Schlossman ML. Electric Field Effect on Phospholipid Monolayers at an Aqueous-Organic Liquid-Liquid Interface. J Phys Chem B 2014; 119:9319-34. [PMID: 25289837 DOI: 10.1021/jp5098525] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electric potential difference across cell membranes, known as the membrane potential, plays an important role in the activation of many biological processes. To investigate the effect of the membrane potential on the molecular ordering of lipids within a biomimetic membrane, a self-assembled monolayer of 1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine (SOPC) lipids at an electrified 1,2-dichloroethane/water interface is studied with X-ray reflectivity and interfacial tension. Measurements over a range of electric potential differences, -150 to +130 mV, that encompass the range of typical biomembrane potentials demonstrate a nearly constant and stable structure whose lipid interfacial density is comparable to that found in other biomimetic membrane systems. Measurements at higher positive potentials, up to 330 mV, illustrate a monotonic decrease in the lipid interfacial density and accompanying variations in the interfacial configuration of the lipid. Molecular dynamics simulations, designed to mimic the experimental conditions, show that the measured changes in lipid configuration are due primarily to the variation in area per lipid with increasing applied electric field. Rotation of the SOPC dipole moment by the torque from the applied electric field appears to be negligible, except at the highest measured potentials. The simulations confirm in atomistic detail the measured potential-dependent characteristics of SOPC monolayers. Our hybrid study sheds light on phospholipid monolayer stability under different membrane potentials, which is important for understanding membrane processes. This study also illustrates the use of X-ray surface scattering to probe the ordering of surfactant monolayers at an electrified aqueous-organic liquid-liquid interface.
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Affiliation(s)
- Hao Yu
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Irena Yzeiri
- ‡Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Binyang Hou
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Chiu-Hao Chen
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Wei Bu
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | | | - Yu-Sheng Chen
- ∥The Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, United States
| | - Binhua Lin
- ∥The Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, United States
| | - Petr Král
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States.,‡Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Mark L Schlossman
- †Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
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WÖrner M, Greiner G, Rau H, Rahmann H, Probst W. Adsorptions- und Grenzflächenverhalten von Gangliosiden an der Phasengrenze Quecksilber/Elektrolyt. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.198800140] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Masters B, Miller IR. Ion Transport and Oscillatory Phenomena Across Adsorbed Monolayers at the Amalgam/Water and Mercurous Halide/Water Interfaces. Isr J Chem 2013. [DOI: 10.1002/ijch.197300030] [Citation(s) in RCA: 2] [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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Nelson A. Electrochemistry of mercury supported phospholipid monolayers and bilayers. Curr Opin Colloid Interface Sci 2010. [DOI: 10.1016/j.cocis.2010.07.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Disalvo EA, Lairion F, Martini F, Tymczyszyn E, Frías M, Almaleck H, Gordillo GJ. Structural and functional properties of hydration and confined water in membrane interfaces. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2655-70. [PMID: 18834854 DOI: 10.1016/j.bbamem.2008.08.025] [Citation(s) in RCA: 174] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 08/19/2008] [Accepted: 08/22/2008] [Indexed: 11/19/2022]
Abstract
The scope of the present review focuses on the interfacial properties of cell membranes that may establish a link between the membrane and the cytosolic components. We present evidences that the current view of the membrane as a barrier of permeability that contains an aqueous solution of macromolecules may be replaced by one in which the membrane plays a structural and functional role. Although this idea has been previously suggested, the present is the first systematic work that puts into relevance the relation water-membrane in terms of thermodynamic and structural properties of the interphases that cannot be ignored in the understanding of cell function. To pursue this aim, we introduce a new definition of interphase, in which the water is organized in different levels on the surface with different binding energies. Altogether determines the surface free energy necessary for the structural response to changes in the surrounding media. The physical chemical properties of this region are interpreted in terms of hydration water and confined water, which explain the interaction with proteins and could affect the modulation of enzyme activity. Information provided by several methodologies indicates that the organization of the hydration states is not restricted to the membrane plane albeit to a region extending into the cytoplasm, in which polar head groups play a relevant role. In addition, dynamic properties studied by cyclic voltammetry allow one to deduce the energetics of the conformational changes of the lipid head group in relation to the head-head interactions due to the presence of carbonyls and phosphates at the interphase. These groups are, apparently, surrounded by more than one layer of water molecules: a tightly bound shell, that mostly contributes to the dipole potential, and a second one that may be displaced by proteins and osmotic stress. Hydration water around carbonyl and phosphate groups may change by the presence of polyhydroxylated compounds or by changing the chemical groups esterified to the phosphates, mainly choline, ethanolamine or glycerol. Thus, surface membrane properties, such as the dipole potential and the surface pressure, are modulated by the water at the interphase region by changing the structure of the membrane components. An understanding of the properties of the structural water located at the hydration sites and the functional water confined around the polar head groups modulated by the hydrocarbon chains is helpful to interpret and analyze the consequences of water loss at the membranes of dehydrated cells. In this regard, a correlation between the effects of water activity on cell growth and the lipid composition is discussed in terms of the recovery of the cell volume and their viability. Critical analyses of the properties of water at the interface of lipid membranes merging from these results and others from the literature suggest that the interface links the membrane with the aqueous soluble proteins in a functional unit in which the cell may be considered as a complex structure stabilized by water rather than a water solution of macromolecules surrounded by a semi permeable barrier.
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Affiliation(s)
- E A Disalvo
- Laboratorio de Fisicoquímica de Membranas Lipídicas, Cátedra de Química General e Inorgánica, Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.
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Bizzotto D, Yang Y, Shepherd JL, Stoodley R, Agak J, Stauffer V, Lathuillière M, Akhtar AS, Chung E. Electrochemical and spectroelectrochemical characterization of lipid organization in an electric field. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.11.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Becucci L, Moncelli MR, Guidelli R. Thallous ion movements through gramicidin channels incorporated in lipid monolayers supported by mercury. Biophys J 2002; 82:852-64. [PMID: 11806927 PMCID: PMC1301894 DOI: 10.1016/s0006-3495(02)75447-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The potential independent limiting flux of hydrated Tl(+) ions through gramicidin (GR) channels incorporated in phospholipid monolayers self assembled on a hanging mercury-drop electrode is shown to be controlled both by diffusion and by a dehydration step. Conversely, the potential independent limiting flux of dehydrated Tl(+) ions stemming from Tl amalgam electro-oxidation is exclusively controlled by diffusion of thallium atoms within the amalgam. Modulating the charge on the polar heads of dioleoylphosphatidylserine (DOPS) by changing pH affects the limiting flux of hydrated Tl(+) ions to a notable extent, primarily by electrostatic interactions. The dipole potential of DOPS and dioleoylphosphatidylcholine (DOPC), positive toward the hydrocarbon tails, does not hinder the translocation step of Tl(+) ions to such an extent as to make it rate limiting. Consequently, incorporation in the lipid monolayer of phloretin, which decreases such a positive dipole potential, does not affect the kinetics of Tl(+) flux through GR channels. In contrast, the increase in the positive dipole potential produced by the incorporation of ketocholestanol causes the translocation step to contribute to the rate of the overall process. A model providing a quantitative interpretation of the kinetics of diffusion, dehydration-hydration, translocation, and charge transfer of the Tl(+)/Tl(0)(Hg) couple through GC channels incorporated in mercury-supported phospholipid monolayers is provided. A cut-off disk model yielding the profile of the local electrostatic potential created by an array of oriented dipoles located in the lipid monolayer along the axis of a cylindrical ion channel is developed.
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Affiliation(s)
- Lucia Becucci
- Department of Chemistry, Florence University, 50121 Florence, Italy
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Avranas A, Retter U, Lunkenheimer K. Effect of the Supporting Electrolyte on the Adsorption of Octanoic Acid at the Mercury/Electrolyte Interface. J Colloid Interface Sci 2000; 227:398-407. [PMID: 10873326 DOI: 10.1006/jcis.2000.6870] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The adsorption and the changes in the interfacial composition of octanoic acid at the mercury/electrolyte interface was studied by measuring the differential capacitance at different concentrations of the supporting electrolyte, at various supporting electrolyte systems and at various temperatures. The adsorption was followed by means of capacity-potential curves in the short-term region and capacity-time transients in the long-term region at selected potentials, in all the potential ranges. A decrease of the capacitance with time was observed in most cases, followed either by a constant capacitance value or by its increase. In the short-term region, anion-surfactant complexes are formed, where the anions act as bridges between the perpendicularly oriented surfactant molecules. The larger is the negative charge of the anion, the more negative will be the charge of the anion-surfactant complex leading to a shift of the potential of maximal adsorption to more positive values. The formation of metastable condensed films is best when the hydration of the anion and its size are not too large. In the long-term region the observed increase of the capacity with time can be explained as an exchange of the metastable condensed film by a hemimicellar surface state. Here, the anions act as cores of the hemimicelles, and the hydrophilic acid groups of the amphiphiles contact the solution. Two contrary effects determine the formation of the hemimicelles. The greater is the specific adsorption of the anions, the larger is the formation of hemimicelles and the increase of the capacity. With an increase in the ability of the anions to break the water structure (lyotropic or Hofmeister series), the formation of hemimicelles will be decreased. Copyright 2000 Academic Press.
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Affiliation(s)
- A Avranas
- Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, 54006, Greece
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Becucci L, Rosa Moncelli M, Guidelli R. Surface charge density measurements on mercury electrodes covered by phospholipid monolayers. J Electroanal Chem (Lausanne) 1996. [DOI: 10.1016/0022-0728(96)04637-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Interaction of cadmium with the adsorbed layer of biogenic surface-active substances at the mercury electrode. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0302-4598(84)87015-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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The interaction of cadmium with linoleic acid and its influence upon the adsorbed film structure at the polarized mercury/water solution interface. J Colloid Interface Sci 1983. [DOI: 10.1016/0021-9797(83)90045-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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The influence of Ca2+ on the electrosorption and inhibition properties of lecithin monolayers. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0302-4598(83)85086-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Müller E, Emons H, Dörfler HD. The influence of Ca2+ on the electrosorption and inhibition properties of lecithin monolayers. J Electroanal Chem (Lausanne) 1983. [DOI: 10.1016/s0022-0728(83)80483-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Müller E, Dörfler HD. 344 - Some relations between the electrosorption behaviour and cation charge transfer at homologous lecithin model membranes - a.c. and d.c. polarographic measurements. Preliminary communication. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0302-4598(80)80006-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pospíšil L, Kůta J, Müller E, Dörfler H. The interfacial properties of lecithin homologues at the mercury/solution interface and the effect of thermally induced chain “melting” phase transition. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/s0022-0728(80)80181-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Müller E, Dörfler HD. Some relations between the electrosorption behaviour and cation charge transfer at homologous lecithin model membranes—a.c. and d.c. polarographic measurements. Preliminary communication. J Electroanal Chem (Lausanne) 1980. [DOI: 10.1016/s0022-0728(80)80270-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Are there any analogies between electrosorption layers of organic compounds and signal-transmitting biomembranes? ACTA ACUST UNITED AC 1979. [DOI: 10.1016/s0022-0728(79)80147-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Miller I, Rishpon J, Tenenbaum A. Electrochemical determination of structure and interactions in spread lipid monolayers. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/0302-4598(76)80043-8] [Citation(s) in RCA: 50] [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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Runbeck G, Mohilner D, Solie T. Electrosorption of L-α-dipalmitoylphosphatidylcholine at the mercury solution interface. Electrochim Acta 1975. [DOI: 10.1016/0013-4686(75)85001-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Runbeck G, Mohilner D, Solie T. Electrosorption of l-α-dipamitoylphosphatidylcholine at the mercury solution interface. Electrochim Acta 1975. [DOI: 10.1016/0013-4686(75)80005-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Electron flow at the polarized mercury-water interface in the presence of membrane fragments rich in Na+−K+-Activated ATPase. J Membr Biol 1970; 2:1-16. [DOI: 10.1007/bf01869846] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/1969] [Indexed: 10/25/2022]
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Bach D, Miller I, Robert F. Transport of ions across lipoprotein monolayers adsorbed at the polarized mercury/water interface. Chem Phys Lipids 1970. [DOI: 10.1016/0009-3084(70)90029-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Colacicco G. Lipid monolayers: mechanisms of protein penetration with regard to membrane models. Lipids 1970; 5:636-49. [PMID: 4098818 DOI: 10.1007/bf02531343] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Bach D, Miller I. The inhibition of oxygen reduction by adsorbed monolayers of phospholipids, proteins and synthetic polybases. Electrochim Acta 1970. [DOI: 10.1016/0013-4686(70)80004-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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