Exchange Reactions

Carmeli, Chanoch

doi:10.1007/978-3-642-66505-9_36

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…In a previous communication (8) Activation of Mg2+-ATPase activity (and [32P]Pi-ATP exchange), the ability of NEM to inhibit phosphorylation, and lightinduced 3H-exchange all involve energy-dependent changes in the conformation of the coupling factor (3,4,6,15,18,23,24). The conditions required for obtaining the bicarbonate-induced enhancement of these activities are rather similar to those required for the direct effect of bicarbonate on phosphorylation, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…It had been suggested (8) that the site of action for bicarbonate in producing this effect is at the level of the interaction between the energized thylakoid membrane and the CF12. In the present study, the effect of bicarbonate on the following light-dependent reactions: Mg2+-ATPase activity (3,4), [32PJPi-ATP exchange activity (6), inhibition of phosphorylation by maleimides (11,13,14,16) and adenine nucleotide exchange (5,9,15,19,22,25,27) NEM Inhibition and Phosphorylation Assays. Inhibition of ATP synthesis in pea seedling chloroplasts by NEM was carried out as previously described (7).…”

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confidence: 84%

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A Proposed Mechanism for the Stimulatory Effect of Bicarbonate Ions on ATP Synthesis in Isolated Chloroplasts

Cohen

Macpeek²

1980

Plant Physiol.

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The effect of bicarbonate ions on induction of Mg2e-ATPase activity, on the N-ethylmaleimide inhibition of phosphorylation and on energydependent adenine nucleotide exchange has been examined with pea seedling chloroplasts. ATP synthesis is stimuiated by bicarbonate in chloroplasts which lack the capacity to fix CO2 (2,8,10,20,21). It had been suggested (8) that the site of action for bicarbonate in producing this effect is at the level of the interaction between the energized thylakoid membrane and the CF12. In the present study, the effect of bicarbonate on the following light-dependent reactions: Mg2+-ATPase activity (3, 4), [32PJPi-ATP exchange activity (6), inhibition of phosphorylation by maleimides (11, 13, 14, 16) and adenine nucleotide exchange (5,9,15,19,22,25,27)

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 84%

A Proposed Mechanism for the Stimulatory Effect of Bicarbonate Ions on ATP Synthesis in Isolated Chloroplasts

Cohen

Macpeek²

1980

Plant Physiol.

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Isolation, purification and characterization of the ATPase complex from the thermophilic cyanobacterium Synechococcus 6716

Lubberding

Zimmer

Walraven

et al. 1983

European Journal of Biochemistry

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The ATPase complex is isolated and purified from membrane vesicles of the thermophilic cyanobacterium Synechococcus 6716 by octyl glucoside and cholic acid by a modification of the procedure for its extraction from spinach chloroplasts. The complex is purified by differential centrifugation and ammonium sulfate precipitation and by gel filtration on Sepharose 6B. The purified fraction, without any phycocyanin contamination, shows ATP hydrolysis activity and Pi/ATP exchange activity of 1564 and 350 nmol · min−1· mg protein−1, respectively. N, N′‐Dicyclohexylcarbodiimide inhibits the ATP hydrolysis activity of this purified fraction. On polyacrylamide gels most typical F1 ATPase polypeptides are identified, but the low‐molecular weight polypeptides visible cannot be ascribed to the Fo part of the complex with certainty; non‐identified bands around 30kDa are also present.

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Exchange Reactions

Cited by 2 publications

References 31 publications

A Proposed Mechanism for the Stimulatory Effect of Bicarbonate Ions on ATP Synthesis in Isolated Chloroplasts

A Proposed Mechanism for the Stimulatory Effect of Bicarbonate Ions on ATP Synthesis in Isolated Chloroplasts

Isolation, purification and characterization of the ATPase complex from the thermophilic cyanobacterium Synechococcus 6716

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