Cellular membranes and membrane-associated proteins

Cellular membranes and membrane-associated proteins represent the structural and functional interfaces of biological cells, consisting of a phospholipid bilayer embedded with diverse proteins (StatPearls, 2023). These proteins, which include receptors, ion channels, and transporters, are essential for maintaining cellular homeostasis, facilitating signal transduction, and regulating the transport of ions and molecules (PubMed, 2021). It is estimated that approximately 30% of the human proteome consists of membrane proteins, and they account for more than 50% of all current therapeutic drug targets (Nature Reviews Drug Discovery, 2006). Because they are involved in nearly every physiological process, their dysfunction is linked to a wide range of pathologies, including oncogenesis, cardiovascular diseases, and neurological disorders (NIH, 2022). Drugs targeting these components often work by agonizing or antagonizing receptors, blocking or opening ion channels, or inhibiting membrane-bound enzymes (PubChem, 2023). However, targeting these proteins can be challenging due to their complex hydrophobic nature and the potential for off-target effects in non-diseased tissues where these proteins may also be expressed (PubMed, 2020).

Other names

Biological membranesPlasma membraneMembrane proteinsIntegral membrane proteinsPeripheral membrane proteins

Drugs targeting this category act by binding to specific integral or peripheral proteins to modulate signaling cascades, regulate ion flux, inhibit enzymatic activity, or alter membrane permeability and lipid composition (PubChem, 2023).