Bacterial sulfhydryl-containing enzymes and proteins

Bacterial sulfhydryl-containing enzymes and proteins represent a broad class of essential microbial molecules that serve as the primary targets for various antiseptic and disinfectant agents (Scribd, 2023; Thinkswap, 2023). These enzymes possess critical cysteine residues with free sulfhydryl (-SH) groups that are vital for their catalytic activity, structural integrity, and overall bacterial metabolism (Thinkswap, 2023). Antimicrobial agents, particularly heavy metals and organomercurial compounds like thimerosal and merbromin, exert their effects by binding to these sulfhydryl groups to form stable mercaptides (SelleckChem, 2022; NIH, 2023). This interaction leads to the non-specific inactivation of multiple enzymatic pathways, effectively disrupting key bacterial processes such as cellular respiration and DNA replication (Scribd, 2023; CDC, 2023). While highly effective as topical anti-infectives and preservatives, the therapeutic use of agents targeting these proteins is often limited by potential toxicity to host tissues and environmental concerns associated with heavy metal accumulation (FDA, 2025; ChemEurope, 2023).

Other names

Bacterial thiol-containing enzymesBacterial sulfhydryl groupsBacterial cysteine-containing enzymesBacterial SH-enzymes

Heavy metal ions or organomercurial compounds bind to the essential sulfhydryl (-SH) groups of bacterial enzymes, forming stable mercaptides that inactivate the enzymes and disrupt microbial metabolism (Scribd, 2023; NIH, 2023).