Membrane proteins and lipid bilayers

Membrane proteins and lipid bilayers constitute the fundamental structural and functional boundaries of all living cells and organelles (Alberts B, et al., Molecular Biology of the Cell). The lipid bilayer provides a semi-permeable barrier composed primarily of phospholipids, cholesterol, and sphingolipids, while membrane proteins—including G protein-coupled receptors, ion channels, and transporters—facilitate communication and transport across this barrier (Nature Reviews Drug Discovery, 2006). In pharmacology, while specific proteins are common targets, the membrane system itself is targeted by agents like Daptomycin and Polymyxin B, which disrupt bacterial membrane integrity (PubChem). Other drugs, such as Amphotericin B, act by binding to specific lipid components like ergosterol to form lethal pores in fungal membranes (StatPearls, 2023). The physical properties of the lipid bilayer, such as fluidity and thickness, are known to modulate the activity of embedded proteins, influencing signal transduction and metabolic pathways (Singer & Nicolson, Science, 1972). Dysregulation of membrane composition or protein-lipid interactions is associated with various pathologies, including cancer and neurodegenerative diseases (Journal of Cell Biology, 2018). Because this term encompasses a vast array of distinct molecules and structural assemblies, it is classified as a broad biological category rather than a single specific therapeutic target.

Other names

Biological membraneCell membranePlasma membraneBiomembraneLipid-protein assembly

Drugs targeting these structures typically act by disrupting membrane integrity, forming transmembrane pores, or modulating the physical properties (such as fluidity and curvature) of the lipid bilayer to indirectly affect the function of embedded proteins (StatPearls, 2023; PubChem).