Physiological enzyme and protein cofactors

Physiological enzyme and protein cofactors are non-protein chemical compounds or metallic ions required for an enzyme's activity as a catalyst (Source: NCBI, Bookshelf NBK545242). They are broadly classified into inorganic ions and complex organic molecules called coenzymes, which are often derived from vitamins (Source: Wikipedia, "Cofactor (biochemistry)"). These substances are vital for fundamental biological processes, including cellular respiration, DNA repair, and signal transduction (Source: PMC4549098). While not traditional therapeutic targets like receptors, they are central to pharmacology; for instance, Methotrexate acts by inhibiting dihydrofolate reductase, thereby disrupting the folate cofactor cycle (Source: PubChem, CID 126941). Deficiencies in these cofactors result in various pathologies, such as scurvy or megaloblastic anemia, while their overabundance or metabolic inhibition is leveraged in treating infections and cancer (Source: StatPearls, "Vitamin Deficiency"). Furthermore, metal ions like zinc and magnesium serve as structural and catalytic components in thousands of human proteins (Source: NIH, "Magnesium Fact Sheet"). Therapeutic intervention often involves the administration of these cofactors to restore normal physiological function or the use of antagonists to halt disease progression (Source: PubMed, PMID 25100611).

Other names

Enzyme cofactorsCoenzymesProsthetic groupsInorganic cofactorsOrganic cofactors

Drugs typically act by supplementing deficient cofactors, competitively inhibiting cofactor binding sites on enzymes, or blocking the biosynthetic pathways of essential cofactors.