Bacterial cell membrane phospholipids and cell envelope polysaccharides

Bacterial cell membrane phospholipids and cell envelope polysaccharides are essential structural components that define the boundary and integrity of bacterial cells (Nature Reviews Microbiology, 2015). Phospholipids, such as phosphatidylglycerol and cardiolipin, form the cytoplasmic membrane, which acts as a selective permeability barrier and a scaffold for membrane proteins (NIH PubChem, 2024). Cell envelope polysaccharides, including peptidoglycan and lipopolysaccharides (LPS), provide mechanical strength and protect the cell from environmental stressors and host immune responses (StatPearls, 2023). These components are critical for bacterial survival, making them effective targets for several classes of antibiotics. For example, polymyxins exert their bactericidal effect by binding to the lipid A portion of LPS and membrane phospholipids, leading to membrane disruption (PubMed, 2021). Daptomycin specifically targets the cytoplasmic membrane of Gram-positive bacteria by interacting with phosphatidylglycerol to cause rapid depolarization (NIH PubChem, 2024). While these targets are highly effective for treating severe infections, their disruption can lead to the release of inflammatory endotoxins or cause systemic toxicities, such as nephrotoxicity, in the host (PubMed, 2021).

Other names

Bacterial cell envelope componentsBacterial surface structuresBacterial membrane lipids and glycansBacterial cell wall and membrane

Direct disruption of the bacterial cell membrane integrity and inhibition of cell envelope component assembly.