Multiple vitamin-dependent enzyme (null)

"Multiple vitamin-dependent enzymes" is not a single molecular entity but rather refers to a **broad class** of enzymes that require vitamins—typically in their coenzyme forms—as essential cofactors for catalytic activity. These include many key metabolic enzymes involved in energy production (such as those in the citric acid cycle), amino acid metabolism (e.g., transaminases dependent on pyridoxal phosphate from vitamin B6), redox reactions (flavoproteins using FAD/FMN from riboflavin/B2), and biosynthetic pathways for neurotransmitters and hormones. Each type of vitamin-dependent enzyme has unique structure-function relationships determined by its specific cofactor requirements—for example: - **Thiamine pyrophosphate**–dependent dehydrogenases are critical for carbohydrate metabolism. - **Pyridoxal phosphate**–dependent aminotransferases are central to amino acid interconversion. - **Coenzyme A**–dependent acyl transferases mediate fatty acid synthesis/oxidation. Deficiencies in the relevant vitamins can impair these enzymatic activities and result in diverse clinical syndromes. Because "multiple vitamin-dependent enzymes" does not refer to one defined protein or gene product but rather an entire functional category spanning numerous unrelated proteins across different families[2][3][4], it is not considered a valid therapeutic target per se—though individual members within this group may be drug targets. This term should be replaced with the name(s) of specific enzymes when seeking structured information about drug interactions or disease relevance.

Other names

Vitamin-dependent enzymeMultivitamin-dependent enzymeEnzyme requiring vitamin cofactor/coenzyme

Catalysis of biochemical reactions via vitamin-derived cofactors or coenzymes[2][3]