Zinc-binding proteins

Zinc-binding proteins constitute a vast and heterogeneous class of molecules, estimated to represent approximately 10% of the human proteome (Andreini et al., 2006). This group includes over 300 enzymes where zinc acts as a crucial catalytic or structural cofactor, such as carbonic anhydrases, matrix metalloproteinases (MMPs), and histone deacetylases (HDACs) (Maret, 2013). Beyond catalysis, zinc is essential for the structural integrity of zinc finger motifs in thousands of transcription factors, which are fundamental for DNA binding and gene regulation (NIH). Because this term encompasses a broad functional category rather than a single molecular entity, it is considered too much information to be a specific therapeutic target. However, many individual proteins within this class are high-value targets for drugs like ACE inhibitors, HDAC inhibitors, and carbonic anhydrase inhibitors (PubChem). Therapeutic strategies involving this group range from systemic zinc supplementation for deficiency to the development of highly selective small molecules that coordinate with the zinc ion in specific enzyme active sites.

Other names

Multiple zinc-dependent enzymes, transcription factors, and structural proteinsZinc proteomeZinc-dependent proteinsZinc-metalloproteins

Pharmacological agents interact with these proteins by either providing zinc as a nutritional cofactor, chelating zinc to inhibit protein function, or binding directly to the zinc-containing active site of specific enzymes to block their catalytic activity (McCall et al., 2000; PubChem).