The conversion of adenosine 5′-phosphate into adenosine triphosphate as catalysed by adenosine triphosphate–creatine phosphotransferase and adenosine triphosphate–adenosine monophosphate phosphotransferase in the presence of phosphocreatine

Adenosine Triphosphate : Guanosine Monophosphate Phosphotransferase

Several laboratories have reported studies on individual enzymes that belong to the general class of adenosine triphosphate : nucleoside monophosphate phosphotransferases (EC 2.7.4.4), commonly termed nucleoside monophosphate kinases (l-7). Studies with partially purified enzyme preparations have indicated that a variety of nucleoside monophosphates can serve as alternative substrates for nucle...

Adenosine triphosphate: adenosine monophosphate phosphotransferase isozymes in rat liver and hepatomas.

Rat liver adenosine triphosphate: adenosine monophosphate phosphotransferase activity. II. Subcellular localization of adenylate kinase isozymes.

Adenylate kinase activity (ATP:AMP-phosphotransferase, EC 2.7.4.3) was studied in subcellular extracts of rat liver tissue. Essentially all of the activity, over 150 units per g of tissue, wet weight (1.7 units per mg of protein), was released into the cytosol when the tissue was homogenized in 0.025 M sucrose. Isotonic (0.25 M sucrose) homogenization and separation of subcellular fractions by ...

Kinetic Studies of the Reverse Reaction Catalysed by Adenosine Triphosphate-creatine Phosphotransferase. the Inhibition by Magnesium Ions and Adenosine Diphosphate.

1. Kinetic investigations of the reaction catalysed by ATP-creatine phosphotransferase have been carried out. 2. No firm conclusions could be reached about the reaction of Mg(2+) at the nucleotide-binding site of the enzyme. The value of the kinetic constant for this reaction depends on the value used for the apparent stability constant of the metal ion-nucleotide complex and, to a smaller exte...

The purification and properties of adenosine triphosphate-lombricine phosphotransferase.

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