Multiple essential cysteine-containing bacterial enzymes

Multiple essential cysteine-containing bacterial enzymes refers to a broad group of bacterial proteins that utilize the thiol group of cysteine residues for catalytic activity, structural stability, or metal binding [PMID: 11033948]. These enzymes are critical for various life-sustaining processes in bacteria, including cellular respiration (e.g., NADH dehydrogenase), metabolism, and cell wall biosynthesis [PMID: 23017226]. Because the thiol group is highly reactive, these enzymes are susceptible to inhibition by heavy metal ions (such as silver or mercury) and electrophilic compounds [Source: PubChem, Silver Nitrate]. Drugs targeting these enzymes typically work by forming covalent bonds with the cysteine residues, leading to protein denaturation and loss of enzymatic function [PMID: 16702442]. This multi-target approach is a hallmark of certain broad-spectrum topical antimicrobials and antiseptics, making it difficult for bacteria to develop resistance compared to single-target antibiotics [Source: StatPearls, Silver Toxicity].

Other names

Bacterial thiol-dependent enzymesCysteine-rich bacterial proteinsThiol-containing bacterial enzymes

Inhibition of enzymatic activity via covalent binding to functional thiol (-SH) groups of cysteine residues, leading to protein inactivation and bacterial cell death.