KCNQ family potassium channel (KCNQ (Kv7) channel)

The **KCNQ family potassium channels** (Kv7.1–Kv7.5) are voltage-gated potassium channels that form tetrameric pores in cell membranes, enabling selective potassium efflux critical for regulating membrane potential in excitable cells. These channels are essential in multiple tissues, including the heart (where KCNQ1 mediates cardiac repolarization), brain (KCNQ2/3/5 contribute to neuronal M-current), and inner ear (KCNQ4 is necessary for normal auditory function). KCNQ channels are modulated by a variety of endogenous factors (such as phosphatidylinositol bisphosphate and calmodulin), and their function can be altered by disease mutations or pharmacological agents. Pathogenic mutations in these channels are implicated in cardiac arrhythmias (such as Long QT syndrome), epilepsy, and sensorineural deafness, making them significant therapeutic targets in neurology and cardiology[1][2][3][4][5][6][7].

Other names

Kv7 channelKv7.1–Kv7.5M-channelKCNQ1-5voltage-gated potassium channel subtype 7

KCNQ channel openers (increase channel activity to reduce neuronal excitability) - KCNQ channel blockers (decrease channel activity to increase neuronal excitability or prolong action potential) - Modulation of channel activity by altering voltage sensitivity and gating properties