Metalloenzymes and metalloproteins requiring Zn²⁺ or Cu²⁺

Metalloenzymes and metalloproteins requiring Zn²⁺ or Cu²⁺ represent a diverse and essential class of proteins that utilize metal ions as critical cofactors for biological activity. Zinc-dependent enzymes, such as carbonic anhydrases and matrix metalloproteinases (MMPs), are involved in a wide range of processes including pH regulation, tissue remodeling, and protein degradation (McCall et al., 2000, Journal of Nutrition). Copper-dependent proteins, including superoxide dismutase and cytochrome c oxidase, are vital for antioxidant defense and cellular energy production (Uauy et al., 1998, American Journal of Clinical Nutrition). These proteins are significant therapeutic targets; for instance, angiotensin-converting enzyme (ACE) is a primary target for treating hypertension, while MMPs are investigated in cancer and inflammatory diseases (Fingleton, 2008, Expert Opinion on Therapeutic Targets). Drugs targeting these molecules typically act by binding directly to the metal ion in the active site, thereby blocking substrate access or catalytic turnover (Patchett et al., 1980, Nature). However, the structural similarity of metal-binding sites across different enzyme families presents a major challenge for achieving drug selectivity and avoiding systemic toxicity (Vallee & Auld, 1990, Biochemistry).

Other names

Zinc-dependent enzymesCopper-dependent enzymesMetalloproteinsZn/Cu metalloenzymes

Inhibition of enzymatic activity through coordination with the metal ion in the active site or through the chelation of essential metal cofactors.