ATP + pyruvate = ADP + H(+) + phosphoenolpyruvate Allosterically activated by AMP and inhibited by ATP. Optimum pH is 5.9-6.0. Optimum temperature is 80 degrees Celsius for the recombinant enzyme. Thermostable up to 85 degrees Celsius. Carbohydrate degradation; glycolysis; pyruvate from D-glyceraldehyde 3-phosphate: step 5/5. Homotetramer. Belongs to the pyruvate kinase family.