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Ermakov YA, Sokolov VS, Akimov SA, Batishchev OV. Physicochemical and Electrochemical Aspects of the Functioning of Biological Membranes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420030085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Penefsky HS. Mitochondrial ATPase. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 49:223-80. [PMID: 162556 DOI: 10.1002/9780470122945.ch6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Considerable progress has been made in recent years in our understanding of the phosphorylating apparatus in mitochondria, chloroplasts, and bacteria. It has become clear that the structure and the function of the ATP synthesizing apparatus in these widely divergent organisms is similar if not virtually identical. The subunit composition of F1, its molecular architecture, the location and function of substrate binding sites, as well as putative control sites, understanding of the component parts of the oligomycin-sensitive ATPase complex, and the role of these components in the function of the complex all are under active investigation in many laboratories. The developing information and the new insights provided have begun to permit experimental approaches, at the molecular level, to the mode of action of the ATPase in electron-transport-coupled ATP synthesis.
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Volkov AG, Gugeshashvili MI, Deamer DW. Energy conversion at liquid/liquid interfaces: artificial photosynthetic systems. Electrochim Acta 2001; 40:2849-68. [PMID: 11540307 DOI: 10.1016/0013-4686(95)00214-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This chapter focuses on multielectron reactions in organized assemblies of molecules at the liquid/liquid interface. We describe the thermodynamic and kinetic parameters of such reactions, including the structure of the reaction centers, charge movement along the electron transfer pathways, and the role of electric double layers in artificial photosynthesis. Some examples of artificial photosynthesis at the oil/water interface are considered, including water photooxidation to the molecular oxygen, oxygen photoreduction, photosynthesis of amphiphilic compounds and proton evolution by photochemical processes.
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Affiliation(s)
- A G Volkov
- Department of Chemistry, University of California, Santa Cruz 95064, USA
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Affiliation(s)
- Alexander G. VOLKOV
- Department of Civil and Environmental Engineering, 5732F Boelter Hall, University of California at Los Angeles
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KHARKATS YI, VOLKOV AG. Cytochrome Oxidase at the Membrane/Water Interface: Mechanism of Functioning and Molecular Recognition. ANAL SCI 1998. [DOI: 10.2116/analsci.14.27] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yurij I. KHARKATS
- The A. N. Frumkin Institute of Electrochemistry, Academy of Sciences of Russia
| | - Alexander G. VOLKOV
- Department of Civil and Environmental Engineering, 5732F Boelter Hall, University of California at Los Angeles
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Volkov AG, Deamer DW. Redox chemistry at liquid/liquid interfaces. PROGRESS IN COLLOID & POLYMER SCIENCE 1997; 103:21-8. [PMID: 11541167 DOI: 10.1007/3-798-51084-9_3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
The interface between two immiscible liquids with immobilized photosynthetic pigments can serve as the simplest model of a biological membrane convenient for the investigation of photoprocesses accompanied by spatial separation of charges. As it follows from thermodynamics, if the resolvation energies of substrates and products are very different, the interface between two immiscible liquids may act as a catalyst. Theoretical aspects of charge transfer reactions at oil/water interfaces are discussed. Conditions under which the free energy of activation of the interfacial reaction of electron transfer decreases are established. The activation energy of electron transfer depends on the charges of the reactants and dielectric permittivity of the non-aqueous phase. This can be useful when choosing a pair of immiscible solvents to decrease the activation energy of the reaction in question or to inhibit an undesired process. Experimental interfacial catalytic systems are discussed. Amphiphilic molecules such as chlorophyll or porphyrins were studied as catalysts of electron transfer reactions at the oil/water interface.
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Affiliation(s)
- A G Volkov
- Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064, USA
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Emulsion photobioelectrochemistry: Bacteriorhodopsin phototransfer of protons through the water/lipid interface. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0302-4598(91)80019-y] [Citation(s) in RCA: 3] [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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Emulsion photobioelectrochemistry: bacteriorhodopsin phototransfer of protons through the water/lipid interface. J Electroanal Chem (Lausanne) 1991. [DOI: 10.1016/0022-0728(91)85591-c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Cytochrome oxidase: molecular mechanism of functioning. J Electroanal Chem (Lausanne) 1989. [DOI: 10.1016/0022-0728(89)87301-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kharkats YI, Volkov AG. Membrane catalysis: synchronous multielectron reactions at the interface between two liquid phases. Bioenergetic mechanisms. BIOCHIMICA ET BIOPHYSICA ACTA 1987; 891:56-67. [PMID: 3030417 DOI: 10.1016/0005-2728(87)90083-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Kinetics of multi-electron reactions at the interface between two immiscible liquids are considered. Calculations of the energy of solvent reorganization, of the work required to bring reactants and reaction products together, and of the electrostatic contributions to the Gibbs free energy of the reaction during electron transfer between reactants which are in different dielectric media are reported. Conditions under which the free energy of activation of the interfacial reaction of electron transfer decreases are established. The influence of the distance between reactants and of the dielectric permittivity of the non-aqueous phase on the solvent reorganization energy value is studied. Conditions under which multielectron reactions at the interface proceed are discussed. The biophysics and biochemistry of photosynthesis and respiration are considered as examples of multielectron processes.
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Tiede DM. Incorporation of membrane proteins into interfacial films: model membranes for electrical and structural characterization. BIOCHIMICA ET BIOPHYSICA ACTA 1985; 811:357-79. [PMID: 3910106 DOI: 10.1016/0304-4173(85)90007-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Lanyi JK. Chapter 11 Bacteriorhodopsin and related light-energy converters. NEW COMPREHENSIVE BIOCHEMISTRY 1984. [DOI: 10.1016/s0167-7306(08)60321-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Interface between Two Immiscible Liquids as a Tool for Studying Membrane Enzyme Systems. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/s0070-2161(08)60114-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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17
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Criteria for the Reconstitution of Ion Transport Systems. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/s0070-2161(08)60115-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Stoeckenius W, Lozier RH, Bogomolni RA. Bacteriorhodopsin and the purple membrane of halobacteria. BIOCHIMICA ET BIOPHYSICA ACTA 1979; 505:215-78. [PMID: 35226 DOI: 10.1016/0304-4173(79)90006-5] [Citation(s) in RCA: 781] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Eisenbach M, Caplan SR. The Light-Driven Proton Pump of Halobacterium halobium: Mechanism and Function. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/s0070-2161(08)60258-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Skulachev VP. Methods for reconstitution of the electrogenic function of membrane proteins. Methods Enzymol 1979; 55:751-76. [PMID: 223003 DOI: 10.1016/0076-6879(79)55084-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kagawa Y. Reconstitution of the energy transformer, gate and channel subunit reassembly, crystalline ATPase and ATP synthesis. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 505:45-93. [PMID: 30482 DOI: 10.1016/0304-4173(78)90008-3] [Citation(s) in RCA: 198] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Blok MC, van Dam K. Association of bacteriorhodopsin-containing phospholipid vesicles with phospholipid-impregnated millipore filters. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 507:48-61. [PMID: 623749 DOI: 10.1016/0005-2736(78)90373-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Bayley ST, Morton RA. Recent developments in the molecular biology of extremely halophilic bacteria. CRC CRITICAL REVIEWS IN MICROBIOLOGY 1978; 6:151-205. [PMID: 365457 DOI: 10.3109/10408417809090622] [Citation(s) in RCA: 108] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Hwang SB, Korenbrot JI, Stoeckenius W. Structural and spectroscopic characteristics of bacteriorhodopsin in air-water interface films. J Membr Biol 1977; 36:115-35. [PMID: 561850 DOI: 10.1007/bf01868147] [Citation(s) in RCA: 88] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A suspension of purple membrane fragments in a solution of soya phosphatidyl-choline in hexane is spread at an air-water interface. Surface pressure and surface potential measurements indicate that the membrane fragments and lipids organize at the interface as an insoluble film. Electron microscopy of shadow-cast replicas of the film reveal that in the bacteriorhodopsin to soya PC weight ratio range of 2:1 to 10:1, these films consist of nonoverlapping membrane fragments which occupy approximately 35% of the surface area and are separated by a lipid monolayer. Furthermore, the membrane fragments are oriented with their intracellular surface towards the aqueous subphase. Nearly all the bacteriorhodopsin molecules at the interface are spectroscopically intact and exhibit visible spectral characteristics identical to those in aqueous suspensions of purple membrane and in intact bacteria. In addition, bacteriorhodopsin in air-dried interface films show spectral changes upon dark-adaptation and upon flash illumination similar to those observed in aqueous suspensions of purple membrane, but with slower kinetics. The kinetics of the spectral changes in interface films can be made nearly the same as in aqueous suspension by immersing the films in water.
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Hwang SB, Korenbrot JI, Stoeckenius W. Proton transport by bacteriorhodopsin through an interface film. J Membr Biol 1977; 36:137-58. [PMID: 561851 DOI: 10.1007/bf01868148] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Interface films of purple membrane and lipid containing spectroscopically intact and oriented bacteriorhodopsin have been used as a model system to study the function of this protein. Small positive charges in surface potential (less than 1 mV) are detected upon illumination of these films at the air-water interface. These photopotentials are not affected by overlaying the interface film with a thin layer (0.3 mm) of decane. However, they are dramatically increased when lipid soluble proton carriers FCCP or DNP are added to the decane. The polarity of the photopotential indicates that, in the light, positive charges are transported through the interface from the aqueous to the organic phase. The action spectrum of the photopotential is identical to the absorption spectrum of bacteriorhodopsin. Since bacteriorhodopsin molecules are oriented with their intracellular surface towards the aqueous subphase, the characteristics of the photopotential indicate that in the light bacteriorhodopsin translocates protons from its intracellular to its extracellular surface. The kinetics of the photopotential reveal that the rate and extent of proton transport are proportional both to the fraction of bacteriorhodopsin molecules excited and to the concentration of proton acceptor. The photopotentials result from changes in the ionic distribution across the decane-water interface and can be cancelled by lipid soluble anions.
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Kozlov IA, Skulachev VP. H+-Adenosine triphosphatase and membrane energy coupling. BIOCHIMICA ET BIOPHYSICA ACTA 1977; 463:29-89. [PMID: 19061 DOI: 10.1016/0304-4173(77)90003-9] [Citation(s) in RCA: 163] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Mitchell P. A commentary on alternative hypotheses of protonic coupling in the membrane systems catalysing oxidative and photosynthetic phosphorylation. FEBS Lett 1977; 78:1-20. [PMID: 17549 DOI: 10.1016/0014-5793(77)80263-9] [Citation(s) in RCA: 149] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kharkats YI, Volkov AG, Boguslavsky LI. Transfer of ions and electrons across the interface between tow immiscible liquids in functioning enzyme membrane systems. J Theor Biol 1977; 65:379-91. [PMID: 853756 DOI: 10.1016/0022-5193(77)90332-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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HAROLD FRANKLINM. Membranes and Energy Transduction in Bacteria1 1Abbreviations: Δψ, membrane potential; ΔpH, pH gradient; Δp, proton-motive force. These are related by: Δp = Δψ - (23RT/F) ΔpH ≅ Δψ - 60 ΔpH. ANS, l-anilino-8-naphthalene sulfonate; DCCD, N, N'-dicyclohexylcarbodiimide; CCCP, carbonylcyanide-m-chlorophenylhydrazone; HOQNO, hydroxyquinoline-N-oxide; PEP, phosphoenolpyruvic acid. EDTA, ATP, GTP, DNA, NAD(H), and NADP(H) have their usual meanings. CURRENT TOPICS IN BIOENERGETICS 1977. [DOI: 10.1016/b978-0-12-152506-4.50010-8] [Citation(s) in RCA: 194] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Electron transfer by chlorophyll through the interface between two immiscible liquids. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/0302-4598(77)80006-8] [Citation(s) in RCA: 8] [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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Boguslavsky LI, Volkov AG, Kandelaki MD. Transfer of electrons and protons at the decane/water interface in the presence of chlorophyll. FEBS Lett 1976; 65:155-8. [PMID: 1278416 DOI: 10.1016/0014-5793(76)80469-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Yaguzhinsky LS, Boguslavsky LI, Volkov AG, Rakhmaninova AB. Synthesis of ATP coupled with action of membrane protonic pumps at the octane-water interface. Nature 1976; 259:494-6. [PMID: 130557 DOI: 10.1038/259494a0] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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