Thiamine-dependent metabolic enzymes (TDME)

Thiamine-dependent metabolic enzymes are a specialized group of enzymes that require thiamine pyrophosphate (TPP), the biologically active derivative of vitamin B1, as a mandatory cofactor for their catalytic activity (UniProt, 2024). This group includes key players in central metabolism such as the pyruvate dehydrogenase complex (PDC), alpha-ketoglutarate dehydrogenase (KGDH), branched-chain alpha-keto acid dehydrogenase (BCKDH), and transketolase (TKT) (NCBI, 2023). These enzymes are fundamental to the aerobic oxidation of glucose, the citric acid cycle, and the pentose phosphate pathway, making them indispensable for cellular ATP production and the generation of biosynthetic precursors (StatPearls, 2023). Deficiencies in thiamine or genetic mutations affecting these enzymes lead to significant clinical pathologies, including Beriberi, Wernicke-Korsakoff syndrome, and maple syrup urine disease (NIH, 2023). In modern pharmacology, these enzymes are targeted through thiamine supplementation to treat deficiency-related metabolic failure or through the development of thiamine antagonists to inhibit the metabolic reprogramming observed in various cancers (Nature, 2020). Consequently, they represent a critical intersection between nutrition, metabolic regulation, and therapeutic intervention in both genetic and acquired diseases.

Other names

TPP-dependent enzymesThiamine pyrophosphate-dependent enzymesThiamin-dependent enzymes

Cofactor supplementation to restore enzymatic activity and competitive inhibition of thiamine pyrophosphate binding to disrupt metabolic flux.