Multiple bacterial enzymes and proteins (silver-binding proteins)

Silver ions exert broad-spectrum antibacterial action by binding to multiple bacterial proteins and enzymes—especially those with exposed thiol (–SH) groups—resulting in loss of enzymatic function crucial for bacterial metabolism and viability. These targets include membrane-associated structural proteins, metabolic enzymes, respiratory enzymes, and proteins involved in cell wall biosynthesis and DNA replication[1][2][4][5][6]. Protein binding causes disruption of membrane integrity, impairment of ATP production, inhibition of DNA replication, and generation of intracellular reactive oxygen species. This multi-target action underlies the high effectiveness and difficulty of bacterial resistance to silver, but such broad reactivity also increases the risk of toxicity and limits selectivity, complicating therapeutic use and raising safety and environmental concerns[6]. "Multiple bacterial enzymes/proteins via binding of silver ions" should not be considered a single molecular target but rather a pharmacological class representing a broad, polypharmacologic mechanism[2][6]. Thus, this is not a canonical target name, but rather describes a general mode of action. Note: - This entry is not a standard, single molecular target; it aggregates multiple molecular targets under a shared mechanism of action ("silver-binding proteins"). For structured data, silver's antibacterial effects should be mapped to classes such as "bacterial thiol-containing enzymes" or "bacterial membrane proteins" rather than a unique, canonical target[2][6]. - If a standardized, canonical target is required, further refinement should specify one protein or enzyme (e.g., "bacterial tryptophanase", "bacterial peptidoglycan transpeptidase") rather than the broad multi-target effect.

Other names

bacterial silver-binding enzymesbacterial membrane proteins (silver target)bacterial thiol enzymesbacterial respiratory enzymessilver-binding bacterial proteins

Enzyme inhibition via direct binding to thiol groups (–SH) in active sites of enzymes, leading to loss of enzymatic activity[1][2][4][5][6] Disruption of bacterial cell wall and membrane integrity via protein binding[1][4][6] Induction of oxidative stress through generation of reactive oxygen species in bacterial cells[2][6][8] Interference with DNA structure and replication by interaction with DNA and DNA-binding proteins[2][6][8] Disruption of protein synthesis by denaturing ribosomes and cytoplasmic proteins[6] Inhibition of peptidoglycan synthesis and activation of cell wall autolytic enzymes (autolysins)[4][8]