Entrez Summary: The protein encoded by this gene forms a potassium channel that is thought to play a critical role in the regulation of neuronal excitability, particularly in sensory cells of the cochlea. The current generated by this channel is inhibited by M1 muscarinic acetylcholine receptors and activated by retigabine, a novel anti-convulsant drug. The encoded protein can form a homomultimeric potassium channel or possibly a heteromultimeric channel in association with the protein encoded by the KCNQ3 gene. Defects in this gene are a cause of nonsyndromic sensorineural deafness type 2 (DFNA2), an autosomal dominant form of progressive hearing loss. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008].
UniProt Summary: Probably important in the regulation of neuronal excitability. May underlie a potassium current involved in regulating the excitability of sensory cells of the cochlea. KCNQ4 channels are blocked by linopirdin, XE991 and bepridil, whereas clofilium is without significant effect. Muscarinic agonist oxotremorine-M strongly suppress KCNQ4 current in CHO cells in which cloned KCNQ4 channels were coexpressed with M1 muscarinic receptors.
Pfam DomainsGO Terms
Pfam Domains
KCNQ channel
Ion trans 2
Ion trans
GO Terms
potassium channel activity
delayed rectifier potassium channel activity
basal plasma membrane
voltage-gated potassium channel activity
voltage-gated potassium channel complex
inner ear morphogenesis
ear morphogenesis
sensory perception of sound
potassium ion transmembrane transport
sensory perception of mechanical stimulus
potassium ion transport
inner ear development
calmodulin binding
ear development
sensory organ morphogenesis
embryonic organ morphogenesis
monovalent inorganic cation transport
embryonic organ development
regulation of ion transmembrane transport
sensory organ development
inorganic cation transmembrane transport
regulation of transmembrane transport
embryonic morphogenesis
cation transmembrane transport
metal ion transport
inorganic ion transmembrane transport
regulation of ion transport
cation transport
ion transmembrane transport
animal organ morphogenesis
sensory perception
embryo development
transmembrane transport
ion transport
nervous system process
regulation of transport
system process
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)