Biological membrane microdomain

A **biological membrane microdomain** is a specialized subregion of the plasma membrane or internal cellular membranes, typically enriched in specific lipids (e.g., cholesterol, glycosphingolipids) and scaffolding proteins that create a more ordered structure compared to the surrounding membrane[1][3][5][6][7]. Examples include **lipid rafts** and **tetraspanin-enriched microdomains**. Microdomains serve as organizational hubs, compartmentalizing and concentrating proteins, receptors, and signaling molecules, thereby facilitating and modulating key processes such as signal transduction, cell migration, immune synapse formation, and cellular trafficking[4][5][6][7]. These structures are involved in the localization and activity of membrane-associated enzymes, the spatial arrangement of membrane receptors, and the efficiency of protein-protein interactions[2][5]. Alterations or dysfunction of membrane microdomains can impact disease states including cancer, infection, immune disorders, metabolic bone disease, and neurodegeneration[1][3][4]. While membrane microdomains are not themselves direct drug targets like enzymes or receptors, they are increasingly studied as potential indirect therapeutic targets due to their central organizational role in membrane-based processes[4][7].

Other names

Lipid raftmembrane raftmembrane domainfunctional membrane microdomain (FMM)