Bacterial and viral lipid membranes

Bacterial and viral lipid membranes are essential structural components that define the boundary of the pathogen and maintain its physiological integrity. In bacteria, the cytoplasmic membrane is responsible for critical processes including energy transduction via the proton motive force, lipid biosynthesis, and the selective transport of ions and nutrients (Sohlenkamp & Geiger, 2016, FEMS Microbiology Reviews). Enveloped viruses utilize a lipid bilayer, typically acquired from the host cell membrane during budding, which serves as a scaffold for viral glycoproteins necessary for host cell recognition and entry (Lorizate & Kräusslich, 2011, Cold Spring Harbor Perspectives in Biology). These membranes are distinct from mammalian membranes in their lipid composition, such as the high content of negatively charged lipids like phosphatidylglycerol in bacteria or the presence of an outer membrane containing lipopolysaccharides in Gram-negative species (Epand et al., 2016, Biochimica et Biophysica Acta). Therapeutic agents like polymyxins and daptomycin target these specific lipid environments to induce membrane permeabilization, depolarization, or physical disruption, leading to rapid loss of cellular homeostasis and pathogen death (Boparai & Sharma, 2020, Frontiers in Microbiology). While highly effective, targeting these structures presents challenges due to potential cross-reactivity with host cell membranes, which can result in significant toxicities such as nephrotoxicity or hemolysis (Falagas & Kasiakou, 2006, Critical Care).

Other names

Microbial lipid bilayersBacterial cell membranesViral envelopesPathogen lipid bilayers

Disruption of membrane integrity through pore formation, depolarization of the transmembrane potential, or inhibition of membrane fusion.