The Adenosine Triphosphate-Adenosine Diphosphate Exchange Reaction of Oxidative Phosphorylation
نویسندگان
چکیده
منابع مشابه
The adenosine triphosphate-adenosine diphosphate exchange reaction of oxidative phosphorylation.
Previous reports from this laboratory have demonstrated that the ATP-Pi32 1 exchange reaction (1) and the dinitrophenolstimulated ATPase activity (2) of mitochondrial subfragments (3-9) are reflections of intermediate enzymatic steps in the complex sequence of reactions (1, 3) in which phosphorylation of ADP is coupled to electron transport in the respiratory chain. This communication concerns ...
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Studies of the adenosine triphosphate-adcnosine diphosphate exchange reaction of phosphorylating submitochondrial particles first described by Cooper and Lehninger (l), and subsequently studied in detail by Bronk and Kielley (2), and Wadkins and Lehninger (3) have provided evidence that this exchange reaction is a manifestation of the terminal step of oxidative phosphorylation in which ADP reac...
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Maximal activation of a Na+-dependent adenosine diphosphate-adenosine triphosphate exchange reaction mediated by kidney microsomes was achieved at 0.1 mu and 0.4 mu Mg++ in the presence of 1.5 mM and 32 mM Na+, respectively. K+ inhibited the Na+-dependent exchange rate when lower concentrations of Na+ and Mg++ were used and stimulated it in the presence of 0.4 mM Mg++ and 32 mM Na+. The inhibit...
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With suitable submitochondrial particles from the heart, the rate of the inorganic phosphate e HOH exchange during substrate oxidation in the absence of ADP is less than l/1000 of the rate in the presence of ADP. The concentration dependence of the exchange on ADP shows simple saturation behavior with an apparent K, of 0.32 mM. For net oxidative phosphorylation under similar conditions, but wit...
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phosphorylation or photophosphorylation is a multi-step, membrane-located process that provides the bulk of cellular energy in eukaryotes and many prokaryotes. Most of the ATP synthesis in these cells is catalyzed by the enzyme, F1Fo-ATP synthase, also called F1Fo-ATPase (F-ATPase), which in its simplest, bacterial, form is composed of eight subunits (α3:β3:γ:δ:ε:a:b2:c9–12). The archaeal A1Ao-...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1958
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)49378-7