Enzyme metal cofactor sites

Enzyme metal cofactor sites are specialized structural regions within metalloenzymes where metal ions, such as zinc, iron, copper, or magnesium, are coordinated by amino acid residues to facilitate biochemical reactions. These sites are essential for the function of approximately one-third of all known enzymes, serving roles in catalysis, substrate binding, and structural stabilization [1][2]. In drug discovery, these sites are frequently targeted by small molecules that utilize metal-binding pharmacophores to coordinate with the metal ion, effectively inhibiting the enzyme's activity [3]. Common examples include the inhibition of carbonic anhydrase by sulfonamides and the inhibition of angiotensin-converting enzyme by thiol or carboxylate-containing drugs [4]. Because metal-binding motifs are often conserved across diverse enzyme families, achieving high selectivity for a specific target over other metalloenzymes is a major challenge in medicinal chemistry [5]. Consequently, drugs targeting these sites must be carefully designed to avoid off-target effects and potential systemic toxicity associated with metal chelation [6].

Other names

Metalloenzyme active sitesMetal-binding sitesMetalloprotein catalytic centersMetal-coordination sites

Metal coordination and chelation-based inhibition