Bacterial cell membrane lipids and surface macromolecules

Bacterial cell membrane lipids and surface macromolecules are essential structural components that maintain the integrity and functionality of the bacterial cell envelope (Silhavy et al., 2010, Cold Spring Harb Perspect Biol). This target group includes phospholipids, lipopolysaccharides (LPS) in Gram-negative bacteria, and peptidoglycan and teichoic acids in Gram-positive bacteria (Epand et al., 2016, Biochim Biophys Acta). These molecules are critical for osmotic stability, selective permeability, and anchoring proteins involved in pathogenesis and nutrient acquisition. Therapeutically, these structures are targeted by various antibiotics; for instance, polymyxins bind to the lipid A component of LPS to disrupt the outer membrane of Gram-negative bacteria (Poirel et al., 2017, Clin Microbiol Rev). Daptomycin targets the cytoplasmic membrane of Gram-positive bacteria, causing rapid depolarization and cell death (Robbel & Marahiel, 2010, J Biol Chem). While these targets offer high selectivity due to their absence in eukaryotic cells, clinical use is often limited by safety concerns such as nephrotoxicity or the emergence of resistant strains (Falagas & Kasiakou, 2005, Clin Infect Dis).

Other names

Bacterial cell envelopeBacterial cell wallLipopolysaccharidePeptidoglycanTeichoic acidBacterial phospholipidsLipid IIBacterial cell membrane

Binding to Lipid A of lipopolysaccharide, disruption of the outer membrane, calcium-dependent insertion into the cytoplasmic membrane, depolarization of the membrane, and inhibition of peptidoglycan synthesis by binding to D-alanyl-D-alanine or Lipid II (Poirel et al., 2017; Robbel & Marahiel, 2010).