Multiple metabolic enzymes requiring vitamin cofactors

This term refers to a diverse functional group of enzymes rather than a single therapeutic target. These enzymes require non-protein organic molecules, derived from vitamins, as essential cofactors to catalyze vital biochemical reactions, including energy metabolism, amino acid synthesis, and DNA repair (StatPearls, 2023). For example, the pyruvate dehydrogenase complex requires thiamine pyrophosphate (B1), FAD (B2), and NAD+ (B3) to convert pyruvate into acetyl-CoA, a central step in cellular respiration (NIH, 2017). Deficiencies in these cofactors or genetic mutations in the enzymes themselves lead to a wide range of metabolic disorders, such as scurvy, beriberi, or maple syrup urine disease (NIH, 2022). Pharmacologically, this group is addressed through vitamin supplementation to rescue enzyme function or through the use of antimetabolites, like methotrexate, which inhibit specific vitamin-dependent enzymes to treat cancer or autoimmune diseases (PubChem, 2024). Understanding the collective function of these enzymes is critical for managing inborn errors of metabolism and optimizing nutritional support in chronic diseases (Annual Reviews, 2017).

Other names

Vitamin-dependent enzymesCofactor-dependent enzymesMicronutrient-dependent metabolic enzymes

Drugs typically act as exogenous precursors to essential cofactors to restore enzymatic activity in deficiency states, or as competitive inhibitors (antimetabolites) that displace the natural cofactor or substrate to disrupt specific metabolic pathways.