Cell membrane composition

Cell membrane composition" refers to the **molecular makeup of the cell (plasma) membrane**, not a specific molecule or therapeutic target. The cell membrane is primarily composed of a **lipid bilayer**—mainly phospholipids (such as phosphatidylcholine, sphingomyelin on the outer leaflet; phosphatidylethanolamine and phosphatidylserine on the inner leaflet), cholesterol (in animal cells), and glycolipids[1][2][3][4][5]. Embedded within this bilayer are various proteins—integral (transmembrane) and peripheral—which serve diverse functions including transport, signaling, and structural roles[1][2][3]. Carbohydrate groups are attached to some lipids and proteins on the extracellular surface, forming glycoproteins and glycolipids that contribute to cell recognition[5]. The **cell membrane acts as a selective barrier**, regulating entry/exit of substances, maintaining cellular integrity, supporting signal transduction pathways via embedded receptors/channels/transporters, mediating cell-cell interactions through adhesion molecules/glycocalyx components, anchoring cytoskeletal elements for shape maintenance, and participating in endocytosis/exocytosis for material exchange[2][3][4]. Because "cell membrane composition" describes an aggregate property rather than a discrete molecular entity or druggable target such as a receptor or enzyme—and because it encompasses many different molecules—it is not considered a therapeutic target itself. Instead, individual components of the cell membrane (e.g., specific ion channels or receptors) may be targeted therapeutically. Therefore: - This entry is **not** considered a valid molecular target. - It should be flagged as incorrect for use in structured drug-target databases. - For research purposes involving drugs or biomarkers related to membranes generally refer instead to specific proteins/lipids within the plasma membrane. If you need information about particular *components* of the cell membrane that are established targets (e.g., sodium-potassium ATPase pump; G protein-coupled receptors; ion channels), please specify which one.

Other names

Plasma membrane compositionMembrane lipid compositionMembrane protein composition