KCNQ4

Pore-forming subunit of the voltage-gated potassium (Kv) channel involved in the regulation of sensory cells excitability in the cochlea. KCNQ4/Kv7.4 channel is composed of 4 pore-forming subunits assembled as tetramers. Promotes the outflow of potassium ions in the repolarization phase of action potential which plays a role in regulating membrane potential of excitable cells. The channel conducts a slowly activating and deactivating current. Current often shows some inward rectification at positive potentials. Channel may be selectively permeable in vitro to other cations besides potassium, in decreasing order of affinity K(+) = Rb(+) > Cs(+) > Na(+). Important for normal physiological function of inner ear such as sensory perception of sound..

Function from UniProtKB (P56696), read 2026-09-23. CC BY 4.0.