Microbial cytoplasmic membrane phospholipid bilayer

The microbial cytoplasmic membrane phospholipid bilayer is a complex, essential structure that serves as the primary boundary between the cytoplasm and the external environment in both bacteria and fungi [1.3.1]. In bacteria, this membrane is the site of vital processes including oxidative phosphorylation, ATP synthesis, and the transport of nutrients and waste [1.1.1, 1.3.1]. In fungi, the bilayer is characterized by the presence of ergosterol, which maintains membrane fluidity and structural integrity [1.2.1, 1.2.2]. This structure is a major therapeutic target because its physical disruption leads to an immediate loss of cellular homeostasis and bactericidal or fungicidal effects [1.1.4, 1.3.1]. Drugs such as polymyxins and daptomycin target the bacterial membrane by inducing depolarization or physical damage, while polyene antifungals like amphotericin B bind to ergosterol to create lethal pores [1.1.4, 1.2.1, 1.5.4]. However, the high degree of structural similarity between microbial and mammalian membranes often leads to significant safety concerns, such as nephrotoxicity and neurotoxicity, particularly when drugs lack sufficient selectivity for microbial lipids over host cholesterol [1.5.1, 1.5.3].

Other names

Bacterial and fungal cytoplasmic membrane phospholipid bilayerBacterial cytoplasmic membraneFungal cytoplasmic membraneMicrobial plasma membranePhospholipid bilayer

Disruption of membrane integrity through pore formation, depolarization, or detergent-like effects, leading to the leakage of essential intracellular components and rapid cell death.