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Zhang S, Fang X, Wu W, Tong C, Chen H, Yang H, Gao H. Effects of negative air ions treatment on the quality of fresh shiitake mushroom (Lentinus edodes) during storage. Food Chem 2022; 371:131200. [PMID: 34624741 DOI: 10.1016/j.foodchem.2021.131200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/04/2021] [Accepted: 09/17/2021] [Indexed: 11/04/2022]
Abstract
Fresh shiitake (Lentinus edodes) is prone to brown, pileus-opening and flavor-loss during storage. Therefore, it is important to find an effective preservation method for fresh shiitake. Negative air ions (NAI) are negatively-charged molecules or atoms in the air, and can affect the physiological metabolism of live cells and be conveniently used with low cost. In this study, NAI treatment was performed at different times and the physico-chemical characteristics, microstructure, membrane potential and energy metabolism of shiitake were determined during storage. Results showed that NAI treatment for 40 min could reduce 29% of browning index and maintain the hardness of shiitake. NAI treatment groups had higher content of sweetness amino acids, umami amino acids, 5'-IMP, eight-carbon alcohols compounds and cyclic sulfides compounds than the control, and comprehensive quality of the group being treated for 40 min was the best. The mitochondria of shiitake swelled and the membrane potential decreased after being treated by NAI. However, NAI treatment for 40 min could improve the contents of ATP and ADP, maintain a relatively stable energy charge level, and promote energy utilization of shiitake during storage. The results demonstrated that NAI treatment had the potential to improve the quality shiitake during storage.
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Affiliation(s)
- Saili Zhang
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
| | - Xiangjun Fang
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
| | - Weijie Wu
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
| | - Chuan Tong
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
| | - Hangjun Chen
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
| | - Hailong Yang
- School of Life & Environmental Science, Wenzhou University, Chashan University Town, Wenzhou 325035, China
| | - Haiyan Gao
- Institute of Food Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China; Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China; Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China; Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Hangzhou 310021, China
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Fedorchuk TP, Kireeva IA, Opanasenko VK, Terentyev VV, Rudenko NN, Borisova-Mubarakshina MM, Ivanov BN. Alpha Carbonic Anhydrase 5 Mediates Stimulation of ATP Synthesis by Bicarbonate in Isolated Arabidopsis Thylakoids. FRONTIERS IN PLANT SCIENCE 2021; 12:662082. [PMID: 34512677 PMCID: PMC8427869 DOI: 10.3389/fpls.2021.662082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/21/2021] [Indexed: 05/27/2023]
Abstract
We studied bicarbonate-induced stimulation of photophosphorylation in thylakoids isolated from leaves of Arabidopsis thaliana plants. This stimulation was not observed in thylakoids of wild-type in the presence of mafenide, a soluble carbonic anhydrase inhibitor, and was absent in thylakoids of two mutant lines lacking the gene encoding alpha carbonic anhydrase 5 (αCA5). Using mass spectrometry, we revealed the presence of αCA5 in stromal thylakoid membranes of wild-type plants. A possible mechanism of the photophosphorylation stimulation by bicarbonate that involves αCA5 is proposed.
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Affiliation(s)
- Tatiana P. Fedorchuk
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
| | - Inga A. Kireeva
- Centre for the Analysis of Genome Evolution and Function (CAGEF), University of Toronto, Toronto, ON, Canada
| | - Vera K. Opanasenko
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
| | - Vasily V. Terentyev
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
| | - Natalia N. Rudenko
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
| | - Maria M. Borisova-Mubarakshina
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
| | - Boris N. Ivanov
- Institute of Basic Biological Problems, Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences”, Pushchino, Russia
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Strid Å, Karlsson IM, Baltscheffsky M. Demonstration of ΔpH- and Δψ-induced synthesis of inorganic pyrophosphate in chromatophores fromRhodospirillum rubrum. FEBS Lett 2001. [DOI: 10.1016/0014-5793(87)80482-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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4
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Activation of the H+-ATP synthases of a thermophilic cyanobacterium and chloroplasts — a comparative study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1991. [DOI: 10.1016/s0005-2728(05)80241-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Krab K, van Walraven H, Scholts M, Kraayenhof R. Measurement of diffusion potentials in liposomes. Origin and properties of the threshold level in the oxonol VI response. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90066-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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ATP synthesis by ATPase proteoliposomes from the thermophilic cyanobacterium Synechococcus 6716 by ionophore-induced electric potentials and proton gradients. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1985. [DOI: 10.1016/0005-2728(85)90067-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Schönheit P, Perski HJ. ATP synthesis driven by a potassium diffusion potential in Methanobacterium thermoautotrophicum is stimulated by sodium. FEMS Microbiol Lett 1983. [DOI: 10.1111/j.1574-6968.1983.tb00129.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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8
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Factors affecting the development of the capacity for ATP formation in isolated chloroplasts. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1981. [DOI: 10.1016/0005-2728(81)90050-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Halliwell B. The chloroplast at work. A review of modern developments in our understanding of chloroplast metabolism. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1979; 33:1-54. [PMID: 415334 DOI: 10.1016/0079-6107(79)90024-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Cockrell RS, Pressman BC. The use of K+ concentration gradients for the synthesis of ATP by mitochondria. Methods Enzymol 1979; 55:666-75. [PMID: 37406 DOI: 10.1016/0076-6879(79)55074-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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CO2 Exchange Rates and 14C Photosynthetic Products of Maize Leaves as Affected by Potassium Deficiency. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/s0044-328x(78)80023-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Thauer RK, Jungermann K, Decker K. Energy conservation in chemotrophic anaerobic bacteria. BACTERIOLOGICAL REVIEWS 1977; 41:100-80. [PMID: 860983 PMCID: PMC413997 DOI: 10.1128/br.41.1.100-180.1977] [Citation(s) in RCA: 1326] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Tsuchiya T. Adenosine 5'-triphosphate synthesis driven by a protonmotive force in membrane vesicles of Escherichia coli. J Bacteriol 1977; 129:763-9. [PMID: 14110 PMCID: PMC235009 DOI: 10.1128/jb.129.2.763-769.1977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Adenosine 5'-triphosphate (ATP) synthesis energized by an artificially imposed protonmotive force (delta p) in adenosine 5'-diphosphate-loaded membrane vesicles of Escherichia coli was investigated. The protonmotive force is composed of an artificially imposed pH gradient (delta pH) or membrane potential (deltapsi), or both. A delta pH was established by a rapid alteration of the pH of the assay medium. A delta psi was created by the establishment of diffusion potential of K+ in the presence of valinomycin. The maximal amount of ATP synthesized was 0.4 to 0.5 nmol/mg of membrane protein when energized by a delta pH and 0.2 to 0.3 nmol/mg of membrane protein when a delta psi was imposed. Simultaneous imposition of both a delta pH and delta psi resulted in the formation of greater amounts of ATP (0.8 nmol/mg of membrane protein) than with either alone. The amount of ATP synthesized was roughly proportional to the magnitude of the artificially imposed delta p. Although p-chloromercuribenzoate, 2-heptyl-4-hydroxyquinoline-N-oxide, or NaCN each inhibits oxidation of D-lactate, and thus oxidative phosphorylation, none inhibited ATP synthesis driven by an artificially imposed delta p. Membrane vesicles prepared from uncA or uncB strains, which are defective in oxidative phosphorylation, likewise were unable to catalyze ATP synthesis when energy was supplied by an artificially imposed delta p.
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Ben-hayyim G, Neumann J. Proton translocation and ATP formation coupled to electron transport from H2O to the primary acceptor of photosystem 2. EUROPEAN JOURNAL OF BIOCHEMISTRY 1977; 72:57-61. [PMID: 64361 DOI: 10.1111/j.1432-1033.1977.tb11224.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1. The rate of electron transport from H2O to silicomolybdate in the presence of 3-(3-4-dichlorophenyl)-1,1-dimethylurea (diuron) (which involves the oxygen-evolving enzyme, the photochemistry of photosystem 2 and the primary electron acceptor of photosystem 2) is controlled by internal pH. This is based on the shift of the pH profile of the rate of electron transport upon addition of uncouplers, or by using EDTA-treated chloroplasts. Both stimulation and inhibition of electron transport by addition of uncouplers (depending on external pH) could be observed. These effects are obtained in the diuron-insensitive photoreductions of either silicomolybdate or ferricyanide. These experiments provide strong evidence that a proton translocating site exists in the sequence of the electron transport H2O leads to Q (the primary acceptor of photosystem 2). 2. The photoreduction of silicomolybdate in the presence of diuron causes the formation of delta pH. The value of delta pH depends on the external pH and its maximal value was shown to be 2.4. The calculated internal pH at different external pH values was found to be rather constant, namely between 5.1 -- 5.2. 3. Electron transport from H2O to silicomolybdate (in the presence of diuron) does not support ATP formation. It is suggested that this is due to the fact that the delta pH formed is below the "threshold" delta pH required for the synthesis of ATP. By adding an additional source of energy in the form of a dark diffusion potential created in the presence of K+ and valinomycin, significant amounts of ATP are formed in this system.
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15
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GÓMEZ-PUYOU A, GÓMEZ-LOJERO C. The Use of Ionophores and Channel Formers in the Study of the Function of Biological Membranes. CURRENT TOPICS IN BIOENERGETICS 1977. [DOI: 10.1016/b978-0-12-152506-4.50012-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Ryrie IJ, Blackmore PF. Energy-linked activities in reconstituted yeast adenosine triphosphatase proteoliposome. Adenosine triphosphate formation coupled with electron flow between ascorbate and ferricyanide. Arch Biochem Biophys 1976; 176:127-35. [PMID: 135528 DOI: 10.1016/0003-9861(76)90148-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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17
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Tsuchiya T, Rosen BP. Adenosine 5'-triphosphate synthesis energized by an artificially imposed membrane potential in membrane vesicles of Escherichia coli. J Bacteriol 1976; 127:154-61. [PMID: 6430 PMCID: PMC233046 DOI: 10.1128/jb.127.1.154-161.1976] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Adenosine 5'-triphosphate (ATP) synthesis driven by an artificially imposed membrane potential in right-side-out membrane vesicles of Escherichia coli was investigated. Membrane vesicles prepared in the presence of adenosine diphosphate were loaded with K+ by incubation with 0.5 M potassium phosphate. Addition of valinomycin resulted in the synthesis of 0.2 to 0.3 nmol of ATP/mg of membrane protein, whereas no synthesis was observed after addition of nigericin. Addition of K+, dicyclohexylcarbodiimide, carbonylcyanide p-trifluoromethoxyphenylhydrazone, or azide to the assay buffer inhibited ATP synthesis. Adenosine diphosphate and Mg2+ were found to be required. Ca2+, which can replace Mg2+ for the hydrolytic activity of the Mg2+-adenosine triphosphatase (ATPase) (EC 3.6.1.3), could not replace Mg2+ in the synthetic reaction and, in fact, inhibited ATP synthesis even in the presence of Mg2+. Strain NR-70, a mutant lacking the Mg2+-ATPase, was unable to synthesize ATP using an artificially imposed membrane potential. Additionally, the Mg2+-ATPase was found to contain tightly bound ATP.
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18
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Danon A, Caplan SR. Stimulation of ATP synthesis in Halobacterium halobium R1 by light-induced or artifically created proton electrochemical potential gradients across the cell membrane. BIOCHIMICA ET BIOPHYSICA ACTA 1976; 423:133-40. [PMID: 2313 DOI: 10.1016/0005-2728(76)90107-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The relationship between proton movement and phosphorylation in Halo-bacterium halobium R1 has been investigated under anaerobic conditions. The light-induced changes in the bacteriorhodopsin are accompanied by proton movements across the membrane which result in pH changes in the suspending medium. The initial alkaline shift is shown to be closely paralleled by (and hence correlated with) ATP synthesis. Acidification of the medium in the presence of valinomycin, under conditions of low external potassium, brings about ATP synthesis in the dark.
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19
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Maloney PC, Wilson TH. ATP synthesis driven by a protonmotive force in Streptococcus lactis. J Membr Biol 1975; 25:285-310. [PMID: 3650 DOI: 10.1007/bf01868580] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An electrochemical potential difference for hydrogen ions ( a protonmotive force) was artifically imposed across the membrane of the anaerobic bacterium Streptococcus lactis. When cells were exposed to the ionophore, valinomycin, the electrical gradient was established by a potassium diffusion potential. A chemical gradient of protons was established by manipulating the transmembrane pH gradient. When the protonmotive force attained a value of 215 mV or greater, net ATP synthesis was catalyzed by the membrane-bound Ca++, Mg++ -stimulated ATPase. This was true whether the protonmotive force was dominated by the membrane potential (negative inside) or the pH gradient (alkaline inside). Under these conditions, ATP synthesis could be blocked by the ATPase inhibitor, dicyclohexylcarbodiimide, or by ionophores which rendered the membrane specifically permeable to protons. These observations provide strong evidence in support of the chemiosmotic hypothesis, which states that the membrane-bound ATPase couples the inward movement of protons to the synthesis of ATP.
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20
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Boyer PD. A model for conformational coupling of membrane potential and proton translocation to ATP synthesis and to active transport. FEBS Lett 1975; 58:1-6. [PMID: 1225567 DOI: 10.1016/0014-5793(75)80212-2] [Citation(s) in RCA: 164] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Acceptance of a membrane potential and/or a proton gradient as a possible means of transmitting energy from oxidations to ATP synthesis rests in part on a satisfactory hypothesis for how the potential or proton gradient could drive ATP synthesis. Recognition that energy input may drive ATP synthesis by change in binding of reactants at the catalytic site has led to the suggestions presented in this paper. These are that in oxidative phosphorylation and photophosphorylation, the requisite conformational changes may be coupled to exposure of charged groups to different sides of the membrane. The cycle of charged group exposure or movement may be driven by the membrane potential or, through protonation and deprotonation, may be coupled to proton translocation across the membrane. Effects of proton gradient and membrane potential may be additive. Similar conformational coupling suggestions may explain proton translocation coupled to ATP cleavage and active transport of metabolites coupled to membrane potential, proton gradients of ATP cleavage.
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21
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Grinius L, Slusnyte R, Griniuviene B. ATP synthesis driven by protonmotive force imposed across Escherichia coli cell membranes. FEBS Lett 1975; 57:290-3. [PMID: 241667 DOI: 10.1016/0014-5793(75)80319-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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Synthesis of adenosine triphosphate by an artificially imposed electrochemical proton gradient in bovine heart submitochondrial particles. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)41185-x] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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23
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H+ Ion Transport and Energy Transduction in Chloroplasts. ACTA ACUST UNITED AC 1975. [DOI: 10.1016/s0070-2161(08)60858-8] [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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24
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Gromet-Elhanan Z, Leiser M. Postillumination adenosine triphosphate synthesis in Rhodospirillum rubrum chromatophores. II. Stimulation by a K+ diffusion potential. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)41984-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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25
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Leiser M, Gromet-Elhanan Z. Postillumination adenosine triphosphate synthesis in Rhodospirillum rubrum chromatophores. I. Conditions for maximal yields. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)41983-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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26
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Ryrie IJ. Studies of the oligomycin-sensitive ATPase from yeast mitochondria. Reconstitution of ATP-32Pi exchange in the presence of phospholipids. JOURNAL OF SUPRAMOLECULAR STRUCTURE 1975; 3:242-7. [PMID: 171520 DOI: 10.1002/jss.400030306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A purified preparation of the oligomycin-sensitive ATPase from yeast mitochondria has been shown to elicit an oligomycin- and uncoupler-senstitive ATP-32Pi exchange in the presence of phospholipids. Reconstitution was normally achieved by dialysis of an ATPase-phospholipid-cholate mixture. Following this procedure, vesicles with diameters between 200 and 1,500 A were seen by electron microscopy. As in mitochondria, ATPase activity in the reconstituted system was stimulated by a range of uncouplers which inhibited ATP-32Pi exchange. These and other findings suggest that the coupling mechanism may still be intact within the ATPase complex.
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27
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Pick U, Rottenberg H, Avron M. The dependence of photophosphorylation in chloroplasts on delta pH and external pH. FEBS Lett 1974; 48:32-6. [PMID: 4430371 DOI: 10.1016/0014-5793(74)81055-0] [Citation(s) in RCA: 79] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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28
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Maloney PC, Kashket ER, Wilson TH. A protonmotive force drives ATP synthesis in bacteria. Proc Natl Acad Sci U S A 1974; 71:3896-900. [PMID: 4279406 PMCID: PMC434292 DOI: 10.1073/pnas.71.10.3896] [Citation(s) in RCA: 115] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
When cells of Streptococcus lactis or Escherichia coli were suspended in a potassium-free medium, a membrane potential (negative inside) could be artificially generated by the addition of the potassium ionophore, valinomycin. In response to this inward directed protonmotive force, ATP synthesis catalyzed by the membrane-bound ATPase (EC 3.6.1.3) was observed. The formation of ATP was not found in S. lactis that had been treated with the ATPase inhibitor, N,N'-dicyclohexylcarbodiimide, nor was it observed in a mutant of E. coli lacking the ATPase. Inhibition of ATP synthesis in S. lactis was also observed when the membrane potential was reduced by the presence of external potassium, or when cells were first incubated with the proton conductor, carbonylcyanidefluoromethoxyphenylhydrazone. These results are in agreement with predictions made by the chemiosmotic hypothesis of Mitchell.
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29
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Vandermeulen DL. 12-(9-Anthroyl)-stearic acid and atebrin as fluorescence probes for energetic states of chloroplasts. FEBS Lett 1974; 45:186-90. [PMID: 4138042 DOI: 10.1016/0014-5793(74)80842-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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30
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Leiser M, Gromet-Elhanan Z. Demonstration of acid-base phosphorylation in chromatophores in the presence of a K+ diffusion potential. FEBS Lett 1974; 43:267-70. [PMID: 4213021 DOI: 10.1016/0014-5793(74)80658-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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31
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Schuldiner S, Rottenberg H, Avron M. Stimulation of ATP synthesis by a membrane potential in chloroplasts. EUROPEAN JOURNAL OF BIOCHEMISTRY 1973; 39:455-62. [PMID: 4129992 DOI: 10.1111/j.1432-1033.1973.tb03144.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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32
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Uribe EG. ATP synthesis driven by a K+-valinomycin-induced charge imbalance across chloroplast grana membranes. FEBS Lett 1973; 36:143-7. [PMID: 4754261 DOI: 10.1016/0014-5793(73)80356-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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33
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Uribe EG, Li BC. Stimulation and inhibition of membrane-dependent ATP synthesis in chloroplasts by artificially induced K+ gradients. JOURNAL OF BIOENERGETICS 1973; 4:435-44. [PMID: 4723531 DOI: 10.1007/bf01648970] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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