Alanine Transaminase and Pyruvate Kinase

This entry incorrectly combines two distinct enzymes: Alanine aminotransferase (ALT) and Pyruvate kinase (PK). Alanine aminotransferase is a cytosolic enzyme primarily found in the liver, crucial for amino acid metabolism, and its serum levels are a widely used biomarker for hepatocellular damage and drug-induced liver injury. Pyruvate kinase is an essential glycolytic enzyme, catalyzing the final step of glycolysis, with different isoforms playing roles in energy metabolism in various tissues. Pyruvate kinase is a therapeutic target in diseases like pyruvate kinase deficiency and cancer. These two enzymes have separate physiological roles, molecular identities, and drug interaction profiles, and should be treated as independent targets for accurate biomedical annotation.

This entry represents an incorrect combination of two distinct enzymes. Alanine aminotransferase (ALT) is primarily a biomarker whose levels indicate liver injury and is not a direct drug target for therapeutic modulation. Pyruvate kinase (PK) is an enzyme that catalyzes a key step in glycolysis and is targeted by allosteric activators (e.g., mitapivat) to modulate its activity for therapeutic purposes.