Silver ion (Ag⁺)

The **silver ion** (Ag⁺) is a monovalent cation derived from elemental silver and is the major biologically and pharmacologically relevant form of silver. It is not a receptor, enzyme, transporter, or traditional drug target; rather, it is an inorganic ion with antimicrobial activity utilized in the form of various silver compounds (such as silver nitrate and silver sulfadiazine) in medical and industrial applications[2][4][7]. Its antimicrobial mechanism involves disrupting cellular membranes, binding proteins and DNA, and releasing reactive oxygen species, leading to cell death in bacteria and other microbes[7]. The silver ion is a soft acid (in HSAB theory), highly polarizable, forms stable complexes with soft bases, and does not readily hydrolyze under physiologic conditions[5][6]. Ag⁺ has known toxicity risks, most notably argyria and tissue cytotoxicity, limiting systemic therapeutic applications[4][7]. Additional clarification: - Silver ion is not a molecular target in the conventional drug-target sense but is itself administered or released from silver compounds for its direct toxic effect on pathogens[2][4][7]. - If you require a specific *protein target* (e.g., a receptor the ion binds), "silver ion" is not one; rather, it is a small inorganic agent with non-specific interactions. - The role of silver ion is confined to its use as an antimicrobial agent, not as a characterized therapeutic target like a receptor, enzyme, or transporter. - This entry is marked "is_incorrect: true" because "Silver ion" does not fit traditional drug target categories and is not a biomacromolecule.

Other names

Silver cationSilver(1+)Ag(I)Ag⁺Argentum ionMonovalent silver

Disrupts microbial cell membranes and proteins, generates reactive oxygen species, binds to sulfhydryl groups in enzymes (bactericidal effect of soluble Ag⁺)