Bacterial cell membrane and thiol-containing enzymes

The target Bacterial cell membrane and thiol-containing enzymes represents a multi-component site of action for various broad-spectrum antimicrobial agents, most notably heavy metal ions like silver (Ag+) and mercury [1.1.4, 1.2.3]. The bacterial cell membrane is essential for maintaining osmotic balance, nutrient transport, and energy production via the respiratory chain [1.1.1, 1.1.5]. Thiol-containing enzymes are proteins that rely on free sulfhydryl (-SH) groups for their catalytic activity or structural stability, including enzymes involved in the TCA cycle and DNA synthesis [1.1.3, 1.2.1]. Drugs targeting these sites, such as silver sulfadiazine or thimerosal, exert their effect by binding to the sulfur atoms in cysteine residues, which causes protein misfolding and enzymatic inhibition [1.1.2, 1.2.2]. Additionally, the interaction with membrane-bound proteins leads to the loss of membrane potential and the leakage of intracellular ions like potassium (K+) [1.1.1, 1.1.4]. This dual mechanism ensures potent bactericidal activity against a wide range of Gram-positive and Gram-negative bacteria, making it a staple in topical infection control and pharmaceutical preservation [1.1.3, 1.2.5].

Other names

Bacterial cytoplasmic membraneBacterial sulfhydryl-containing proteinsBacterial thiol-containing proteinsBacterial plasma membrane

Binding to sulfhydryl (-SH) groups of proteins and enzymes, leading to denaturation and inactivation; disruption of the bacterial cell membrane permeability and structural integrity [1.1.1, 1.1.2, 1.2.2].