Bacterial and fungal cell membrane phospholipids and cell wall anionic components

Bacterial and fungal cell membrane phospholipids and cell wall anionic components represent a broad class of essential structural molecules that maintain microbial viability and integrity. In bacteria, the cytoplasmic membrane is enriched with anionic phospholipids such as phosphatidylglycerol and cardiolipin, while the cell wall contains negatively charged polymers like teichoic acids in Gram-positive species and lipopolysaccharides (LPS) in Gram-negative species (Sohlenkamp & Geiger, 2016). Fungal cells possess a unique cell wall composed of chitin and glucans, alongside a plasma membrane containing ergosterol and specific sphingolipids (Gow et al., 2017). These components are vital for regulating osmotic pressure, ion homeostasis, and protecting the microbe from environmental stressors and host immune defenses. Therapeutic agents like daptomycin and polymyxins exploit the high density of negative charges on these surfaces to achieve selective binding, subsequently causing membrane depolarization or physical disruption (Humphries et al., 2013; Trimble et al., 2016). Because mammalian cells primarily feature zwitterionic phospholipids and lack these specific cell wall structures, these anionic components serve as highly effective targets for narrow and broad-spectrum antimicrobial therapy.

Other names

Microbial anionic membrane componentsBacterial anionic phospholipidsFungal cell wall polysaccharidesMicrobial cell envelope targetsTeichoic acidsLipopolysaccharidesPhosphatidylglycerolCardiolipin

Drugs targeting these components typically employ electrostatic attraction to bind negatively charged microbial surfaces, followed by insertion into the lipid bilayer to cause pore formation, depolarization, and leakage of intracellular contents, or by inhibiting the synthesis of essential cell wall polymers (Humphries et al., 2013; Trimble et al., 2016).