Cellular lipid bilayer and membrane-embedded proteins

The cellular lipid bilayer and its embedded proteins constitute the fundamental structural and functional boundary of all living cells (NCBI Bookshelf, 2026). This complex assembly, often described by the fluid mosaic model, consists of a phospholipid bilayer that provides a semi-permeable barrier and a diverse array of integral and peripheral proteins that execute critical cellular processes (Wikipedia, 2026). These proteins, including receptors, transporters, and ion channels, are the primary targets for over 60% of modern pharmaceuticals, facilitating signal transduction and molecular exchange between the cell and its environment (The Scientist, 2025; IJCRCPS, 2024). Beyond serving as a scaffold for proteins, the lipid bilayer itself is increasingly recognized as a therapeutic target through membrane-lipid therapy, where modulating lipid composition or fluidity can indirectly influence protein function and signaling pathways (ASBMB, 2021; Frontiers, 2020). Dysregulation of membrane components is linked to numerous pathologies, including cancer, where altered lipid rafts can promote oncogenic signaling, and infectious diseases, where pathogens exploit or disrupt host membranes (Longdom, 2026; ACS, 2025).

Other names

Cell membranePlasma membraneBiological membranePhospholipid bilayerMembrane proteome

Drugs targeting this assembly function through diverse mechanisms, including direct membrane disruption or pore formation (e.g., daptomycin, amphotericin B), modulation of specific membrane-embedded receptors and ion channels (e.g., morphine, ziconotide), and the alteration of membrane lipid composition or fluidity to indirectly regulate protein signaling (e.g., membrane-lipid therapy with DHA) (Quora, 2015; ASBMB, 2021; PMC, 2016).