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 muscarinnic receptors. Defects in KCNQ4 are the cause of deafness autosomal dominant type 2A (DFNA2A). DFNA2A is a form of sensorineural hearing loss. Sensorineural deafness results from damage to the neural receptors of the inner ear, the nerve pathways to the brain, or the area of the brain that receives sound information. Belongs to the potassium channel family. KQT (TC 1.A.1.15) subfamily. Kv7.4/KCNQ4 sub-subfamily. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Membrane protein, multi-pass
Cellular Component: cytoplasm; integral component of membrane; membrane; neuron projection; plasma membrane; voltage-gated potassium channel complex
Molecular Function: ion channel activity; potassium channel activity; voltage-gated ion channel activity; voltage-gated potassium channel activity
Biological Process: inner ear morphogenesis; ion transport; negative regulation of synaptic transmission, dopaminergic; potassium ion transport; sensory perception of sound; transmembrane transport; transport