Zinc-mediated protein active sites

Zinc-mediated protein active sites represent a broad and essential class of biological structures where a zinc(II) ion serves as a critical cofactor for catalytic, structural, or regulatory functions. Zinc is the second most abundant transition metal in the human body and is incorporated into approximately 10% of the proteome, including over 300 different enzymes. In these active sites, the zinc ion is typically coordinated by a combination of histidine, cysteine, aspartate, or glutamate residues, often activating a water molecule for nucleophilic attack. Prominent therapeutic targets within this class include carbonic anhydrases, matrix metalloproteinases (MMPs), and histone deacetylases (HDACs), which are involved in conditions ranging from glaucoma to cancer. The phrase "methane structures" in the target name is likely a typographical error for "metallo-structures" or a reference to the methine bridges found in certain zinc-coordinated macrocycles like phthalocyanines. Due to the ubiquity of zinc-binding motifs, drugs targeting these sites must achieve high selectivity to avoid systemic toxicity and off-target interactions with the vast array of zinc-dependent proteins in the body.

Other names

Zinc-dependent enzymesZinc metalloenzymesZinc-binding proteinsZinc-coordinated active sites

Inhibition of zinc-dependent catalytic activity through competitive binding or chelation of the active site metal ion.