Pathogen membrane phospholipids and sterols

Pathogen membrane phospholipids and sterols are fundamental structural constituents of the cytoplasmic membranes of bacteria, fungi, and certain parasites. These molecules, including ergosterol in fungi and specific anionic phospholipids like phosphatidylglycerol in bacteria, are vital for maintaining membrane fluidity, integrity, and the electrochemical gradients required for ATP synthesis and nutrient transport (Source: PubMed, PMID: 25108313). Because the lipid composition of microbial membranes differs significantly from the cholesterol-rich membranes of mammalian cells, these components are exploited as targets for highly selective antimicrobial agents. For instance, polyene antifungals such as amphotericin B bind directly to ergosterol to form transmembrane pores, while lipopeptide antibiotics like daptomycin interact with bacterial phospholipids to cause rapid depolarization and cell death (Source: NIH, StatPearls). Targeting these lipids is a cornerstone of treating systemic infections, though therapeutic challenges include managing off-target effects on host cells and addressing microbial resistance mechanisms that involve remodeling membrane lipid profiles.

Other names

Microbial membrane lipidsFungal ergosterolBacterial phospholipidsCell membrane sterolsPathogen lipid bilayer components

Direct binding to membrane lipids or sterols, resulting in the formation of transmembrane pores, membrane depolarization, or physical disruption of the lipid bilayer, leading to the leakage of intracellular contents and cell death.