Results 171 to 180 of about 5,860 (202)
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Control of proton translocation induced by ATPase activity in chloroplasts
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 19751. Proton uptake was induced by ATP in the dark following light triggering of ATPase activity in chloroplasts. The accumulated protons were released when ATPase activity was inhibited by the energy transfer inhibitor DIO-9. 2. Approximately two protons were taken up for each ATP hydrolyzed at pH 8.
C, Carmeli, Y, Lifshitz, A, Gepshtein
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Stoichiometry of Energy Coupling by Proton-Translocating ATPases: A History of Variability
Journal of Bioenergetics and Biomembranes, 2000One of the central energy-coupling reactions in living systems is the intraconversion of ATP with a transmembrane proton gradient, carried out by proton-translocating F- and V-type ATPases/synthases. These reversible enzymes can hydrolyze ATP and pump protons, or can use the energy of a transmembrane proton gradient to synthesize ATP from ADP and ...
J J, Tomashek, W S, Brusilow
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Energy coupling to ATP synthesis by the proton-translocating ATPase
The Journal of Membrane Biology, 1982This review summarizes recent work on energy coupling to ATP synthesis by the reversible, proton-translocating ATPase to mitochondria, chloroplasts, and bacteria. In the first sections, this enzyme is distinguished from other ATP-linked ion transport systems, and progress in the biochemical analysis is discussed.
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Proton translocating ATPase mediated fungicidal activity of eugenol and thymol
Fitoterapia, 2010Eugenol (1) and thymol (2) exhibit excellent fungicidal activity against pathogenic yeasts, including isolates resistant to azoles. The rapid irreversible action of compound-1 and compound 2 on fungal cells suggested a membrane-located target for their action. We investigated their effect on H(+)-ATPase mediated H(+)-pumping by various Candida species.
Aijaz, Ahmad +4 more
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Paracoccus denitrificans proton-translocating ATPase: Kinetics of oxidative phosphorylation
Biochemistry (Moscow), 2010The initial rates of ATP synthesis catalyzed by tightly coupled Paracoccus denitrificans plasma membrane were measured. The reaction rate was hyperbolically dependent on the substrates, ADP and inorganic phosphate (P(i)). Apparent K(m) values for ADP and P(i) were 7-11 and 60-120 µM, respectively, at saturating concentration of the second substrate (pH
K A, Kegyarikova +2 more
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Advances in Biophysics, 1987
Recent results on ATPase, mainly from E. coli, obtained by biochemical and molecular biological approaches are reviewed, with special emphasis on results obtained in this laboratory. The advantages of using E. coli in studies of this important enzyme in oxidative phosphorylation are indicated: variant enzymes with specific amino acid replacements can ...
M, Futai, T, Noumi, M, Maeda
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Recent results on ATPase, mainly from E. coli, obtained by biochemical and molecular biological approaches are reviewed, with special emphasis on results obtained in this laboratory. The advantages of using E. coli in studies of this important enzyme in oxidative phosphorylation are indicated: variant enzymes with specific amino acid replacements can ...
M, Futai, T, Noumi, M, Maeda
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Proton-Translocating ATPase (F1F0) of Escherichia coli
1982Studies on proton-translocating ATPase (F1F0) from Escherichia coli started much later than those on F1F0 from eukaryotic organelles such as mitochondria and chloroplasts. The F1-ATPase of E. coli was purified after solubilization from cytoplasmic membranes and was shown to have essentially the same function and five-subunit structure (α, β, γ, δ ...
Masamitsu Futai, Hiroshi Kanazawa
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Proton translocation in corn coleoptiles: ATPase or redox chain?
Planta, 1985The O2 dependence of net H(+) efflux of maize coleoptiles has been investigated. Below 100 μM O2, H(+) efflux in young (1 cm long) coleoptiles is markedly decreased while old (7 cm long) coleoptiles show a decline only at 10 μM O2. Old coleoptiles show the same decrease in net H(+) efflux as young ones if treated with fusicoccin.
M, Böttger, M, Bigdon, H J, Soll
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Assembly of the yeast vacuolar proton-translocating ATPase.
Journal of bioenergetics and biomembranes, 1999The yeast vacuolar proton-translocating ATPase (V-ATPase) is the best characterized member of the V-ATPase family. Biochemical and genetic screens led to the identification of a large number of genes in yeast, designated VMA, encoding proteins required to assemble a functional V-ATPase.
L A, Graham, T H, Stevens
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A Proton Translocating ATPase Is Associated with the Peroxisomal Membrane of Yeasts
1987The presence of an ATPase on the delimiting membrane of peroxisomes, present in methanol-grown cells of the yeastHansenula polymorphawas investigated. Biochemically an ATPase activity was associated with purified peroxisomes. The activity of this enzyme was also demonstrated cytochemically.
A. C. Douma, M. Veenhuis, W. Harder
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