Microbial cell membrane lipids, proteins, and other oxidizable macromolecules

Microbial cell membrane lipids, proteins, and other oxidizable macromolecules represent the collective molecular targets of broad-spectrum oxidizing biocides. These components are essential for the structural integrity and metabolic viability of bacteria, viruses, and fungi (McDonnell & Russell, 1999). Lipids in the cell membrane are susceptible to peroxidation, which compromises the barrier function and leads to cell lysis. Proteins, including vital enzymes, undergo oxidation of thiol groups and side chains, resulting in denaturation and loss of function (StatPearls, 2023). Additionally, nucleic acids can be oxidatively cleaved, preventing replication and protein synthesis. Because these agents attack multiple fundamental components simultaneously, they are highly effective against a wide range of pathogens and are less prone to the development of microbial resistance compared to site-specific antibiotics (NIH, 2022). However, their non-specific nature also poses risks to host tissues, limiting their clinical application primarily to topical antisepsis and environmental disinfection (PubChem, 2024).

Other names

Microbial cellular componentsOxidizable microbial macromoleculesMicrobial membrane and cytoplasmic constituentsTargets of oxidative biocides

Oxidizing agents exert antimicrobial activity by inducing non-specific oxidative damage to multiple cellular components. This includes the oxidation of sulfhydryl (thiol) groups and amino acid side chains in proteins, leading to enzyme inactivation and structural denaturation (McDonnell & Russell, 1999). They also initiate lipid peroxidation in the cell membrane, causing loss of permeability control and cell lysis. Furthermore, these agents cause oxidative damage to nucleic acids, resulting in strand breaks and inhibition of replication (StatPearls, 2023).