[Characteristics of temperature dependence of Na,K-ATPase].
The character of temperature dependence of hydrolytic and transport functions of Na, K-ATPase is analyzed. It is shown that the nonlinear Arrhenius plot is typical only of "allosteric" substrates ATP and CTP, the inflection of curves reflecting sensitivity of the enzyme to the phase reconstructions of membrane lipids. The linear Arrhenius plots are typical of GTP, UTP- p-NPP and acetyl phosphate, the substrates demonstrating "normal" kinetics of Michaelis and not providing the active transport of ions. A conclusion is drawn that anomalies on the Na, K-ATPase temperature dependence evidence for the lipid control of intersubunit interactions in the supermolecular complex of Na, K-ATPase which are realized during the active transport of ions.
Boldyrev
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AA
D000494:Allosteric Regulation; D007700:Kinetics; D000254:Sodium-Potassium-Exchanging ATPase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013696:Temperature
D000254:Sodium-Potassium-Exchanging ATPase
Kharakteristika temperaturnoĭ zavisimosti Na, K-ATPazy.