Microbial cell membrane phospholipids

Microbial cell membrane phospholipids are essential structural components of the cytoplasmic membranes in bacteria and fungi, providing a semi-permeable barrier that maintains cellular homeostasis and regulates ion transport (StatPearls, 2023). These lipids, which include phosphatidylglycerol, phosphatidylethanolamine, and cardiolipin, differ significantly in charge and composition from the neutral phospholipids found in mammalian cell membranes, allowing for selective pharmacological targeting (PubMed, PMC4584998). Antibiotics such as daptomycin and polymyxins target these phospholipids to induce membrane depolarization, pore formation, and physical disruption of the bilayer (Nature Reviews Microbiology, 2017). This disruption leads to the rapid leakage of essential intracellular components like potassium ions, resulting in cell death. Because these targets are structural rather than metabolic, they are effective against both actively growing and stationary phase bacteria, including many multi-drug resistant (MDR) strains (NIH, 2022). However, the clinical use of membrane-targeting drugs is often limited by potential toxicity to host tissues, such as nephrotoxicity and myopathy, requiring careful monitoring of patient biomarkers (PubMed, PMC7072114).

Other names

Bacterial membrane phospholipidsFungal membrane phospholipidsCytoplasmic membrane phospholipidsAnionic phospholipids

Binding to and disruption of the lipid bilayer, leading to pore formation, membrane depolarization, and leakage of cytoplasmic contents.