Zinc-ion dependent enzyme

Zinc-ion dependent enzymes are molecular catalysts that require a zinc ion (Zn²⁺) in their active or structural site for function. Zinc may participate directly in catalysis (e.g., hydrolyzing peptide bonds in metalloproteinases), stabilize the active site, or regulate enzyme activity allosterically. The zinc atom typically coordinates with amino acid side chains (commonly histidine, cysteine, glutamate/aspartate) in a tetrahedral, trigonal bipyramidal, or octahedral geometry, which greatly influences catalytic efficiency and substrate specificity. Zinc-dependent enzymes are critical for processes ranging from metabolism (alcohol dehydrogenase, carbonic anhydrase), gene regulation (zinc finger proteins), to extracellular matrix remodeling (matrix metalloproteinases). Dysfunction or dysregulation of these enzymes underlies numerous disease states, and many are validated drug targets. For structured database use, it is essential to specify a particular enzyme (e.g., "Matrix metalloproteinase-3," "Angiotensin-converting enzyme") rather than the generic "Zinc-ion dependent enzyme."

Other names

zinc metalloenzymezinc-dependent enzymeZn²⁺ enzyme

Competitive inhibition at the zinc-binding active site Chelation of the zinc ion, blocking enzymatic function Allosteric inhibition altering zinc binding geometry