Various metabolic enzymes requiring B-vitamin cofactors

Many essential **metabolic enzymes** in human physiology require **B-vitamin-derived cofactors**—known as coenzymes—for their catalytic activity. These include thiamine pyrophosphate from vitamin B1 for decarboxylation reactions; flavin mononucleotide/flavin adenine dinucleotide from riboflavin (B2) for redox reactions; nicotinamide adenine dinucleotide/phosphate from niacin/niacinamide/nicotinamide riboside (B3) also for redox chemistry; pyridoxal phosphate from pyridoxine/pyridoxal/pyridoxamine (B6) involved in amino transfer reactions; biotin as a carboxylation cofactor; tetrahydrofolate derived from folic acid involved in one-carbon transfers critical to nucleotide biosynthesis and methylation reactions; cobalamins derived from vitamin B12 required in DNA synthesis and odd-chain fatty acid catabolism[1][2][4][5]. These enzymatic activities are central to energy production pathways such as glycolysis/TCA cycle/oxidative phosphorylation/fatty acid oxidation/amino acid catabolism/nucleic acid biosynthesis[2][4]. Deficiency or pharmacologic inhibition of these vitamins impairs multiple cellular functions leading to diverse clinical syndromes including neurological disorders, hematologic diseases like anemia, cardiovascular risk via homocysteinemia elevation due to impaired methylation cycles[1][4]. In summary: "Various metabolic enzymes requiring B-vitamin cofactors" is not an appropriate canonical target but rather describes an entire class of essential human biochemical machinery whose proper function depends on adequate dietary intake of water-soluble vitamins collectively known as the **B-complex**[1][2].

Other names

Metabolic enzymes with B-vitamin coenzymesEnzymes dependent on B vitaminsVitamin-dependent metabolic enzymes

Varies by drug and enzyme; common mechanisms include inhibition of coenzyme binding sites or competition with natural substrates/cofactors.