Metabolic enzymes requiring vitamin cofactors

Metabolic enzymes requiring vitamin cofactors are a diverse group of catalytic proteins that necessitate non-protein organic molecules, primarily derived from B-complex vitamins, Vitamin C, and Vitamin K, to perform their biological functions. These enzymes are integral to central metabolic pathways, including the citric acid cycle, nucleic acid synthesis, and the modification of clotting factors (StatPearls, 2023). For example, the enzyme dihydrofolate reductase requires a folate-derived cofactor to facilitate one-carbon transfers necessary for DNA replication, making it a primary target for antifolate chemotherapy (NIH, 2022). Similarly, the gamma-glutamyl carboxylase enzyme requires Vitamin K to activate proteins involved in blood coagulation, a process inhibited by the anticoagulant drug warfarin (PubChem, 2024). Because these enzymes are essential for cellular viability, drugs targeting them often exhibit significant therapeutic efficacy but also carry risks of systemic toxicity and secondary nutritional deficiencies.

Other names

Vitamin-dependent enzymesCoenzyme-dependent enzymesApoenzymes requiring vitamin-derived cofactors

Inhibition of enzyme activity through competitive binding at the active site or by interfering with the availability and recycling of essential vitamin-derived cofactors.