title: Activation and inhibition of the phosphoglycerate kinase reaction by ATP.
abstract: A kinetic study for understanding how the phosphoglycerate kinase (ATP: 3-phospho-D-glycerate 1-phosphotransferase, EC 2.7.2.3) reaction discriminates between MgATP2- and ATP-4 is presented. The results show that in contrast to MgATP2-, ATP4- is competitive with 3-phospho-D-glycerate. ATP4- binds to the free enzyme as an inhibitor. When binding to the enzyme-MgATP2- (3-phospho-D-glycerate) complex, ATP4- acts as an activator.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism / Q000494:pharmacology*; D001665:Binding Sites; D005994:Glycerophosphates / Q000378:metabolism; D010735:Phosphoglycerate Kinase / Q000378:metabolism*
chemical_list: D005994:Glycerophosphates; D000255:Adenosine Triphosphate; D010735:Phosphoglycerate Kinase