Membrane potential and pH gradient (null)

Membrane potential refers to the electric potential difference across the plasma membrane, primarily generated and maintained by ion gradients due to the action of pumps (such as Na^+/K^+-ATPase) and ion channels. The transmembrane pH gradient is the difference in hydrogen ion concentration (pH) across a membrane, most notable in organelles like mitochondria, where it contributes to ATP synthesis via the chemiosmotic mechanism[1][3][4][5][7]. Both the membrane potential and pH gradient are components of the broader electrochemical gradient, which is essential for energy transduction, cell signaling, and transport processes. These gradients are not specific macromolecular drug targets themselves, but are fundamental properties manipulated by the action of various proteins—many of which are, in fact, pharmacological targets. Accordingly, "membrane potential/pH gradient" is not suitable as a canonical molecule or receptor entry, but represents important cellular phenomena[1][2][3][4][5][7][8].

Other names

Transmembrane potentialelectrochemical gradientmembrane voltagetransmembrane pH gradientproton gradient

Modulation of ion channel or pump activity (altering membrane potential) Disruption or enhancement of proton gradient (uncoupling or inhibiting ATP synthesis)