The role of alkalication in formation and decomposition of myosin-ATP complex.
The dependence of kinetic constants Km, V(k2) and k1 of myosin-ATPase on the species and concentration of alkali cations and on temperature was investigated.  The value of Vvaries with the ionic radius of different alkali cations.  The curve has a maximum at 1.33 A at the ionic radius of potassium.  The detailed analysis of the cation dependence of the kinetics of the ATPose reaction shows that both formation and decomposition of the complex are affected by the cation present.
D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D002151:Calorimetry; D002586:Cesium / Q000494:pharmacology*; D007700:Kinetics; D008094:Lithium / Q000494:pharmacology*; D008433:Mathematics; D009218:Myosins / Q000378:metabolism*; D011188:Potassium / Q000494:pharmacology; D013329:Structure-Activity Relationship; D013696:Temperature; D013816:Thermodynamics
D002586:Cesium; D000255:Adenosine Triphosphate; D008094:Lithium; D009218:Myosins; D011188:Potassium