Fungal cellular membrane

The fungal cellular membrane is a specialized lipid bilayer that maintains the structural integrity and internal environment of fungal cells (StatPearls, 2023). Its primary distinguishing feature from mammalian membranes is the presence of ergosterol, a sterol essential for regulating membrane fluidity and the function of membrane-bound enzymes (NCBI, 2022). This unique composition allows the membrane to serve as a selective barrier, facilitating nutrient uptake and waste excretion while protecting against osmotic stress (PubMed, 2021). In the context of pharmacology, the fungal cellular membrane is the direct target of polyene antimycotics, such as amphotericin B and nystatin (PubChem, 2024). These agents bind to ergosterol to form transmembrane channels or pores, which trigger the rapid leakage of intracellular ions like potassium, leading to cell death (NIH, 2023). Despite its effectiveness as a target, the structural similarity between ergosterol and human cholesterol can result in significant side effects, particularly nephrotoxicity, due to off-target binding in host cells (StatPearls, 2023).

Other names

Fungal plasma membraneFungal cytoplasmic membraneFungal lipid bilayer

Polyene antifungals bind to ergosterol within the fungal cellular membrane, leading to the formation of transmembrane pores (StatPearls, 2023). These pores cause the leakage of essential intracellular components, such as potassium ions and small molecules, which disrupts the electrochemical gradient and ultimately results in fungal cell death (NCBI, 2022).