Description
Product Characteristics: FUNCTION: Hyperpolarization-activated ion channel with very slow activation and inactivation exhibiting weak selectivity for potassium over sodium ions. May contribute to the native pacemaker currents in heart (If) and in neurons (Ih). Activated by cAMP. May mediate responses to sour stimuli. SUBUNIT: The potassium channel is probably composed of a homo- or heterotetrameric complex of pore-forming subunits. SUBCELLULAR LOCATION: Membrane, Multi-pass membrane protein. TISSUE SPECIFICITY: Highly expressed in pyramidal and granule layer of the hippocampus, in thalamus anterior nucleus, in the supraoptic nucleus in hypothalamus, in cerebellum, and in trapezoid nuclei and superior olivary complex in the auditory system. Detected in a subset of elongated cells in taste buds.,HCN Channels,Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
Target Information: This gene encodes a member of the hyperpolarization-activated cyclic nucleotide-gated potassium channels. The encoded protein shows slow kinetics of activation and inactivation, and is necessary for the cardiac pacemaking process. This channel may also mediate responses to sour stimuli. Mutations in this gene have been linked to sick sinus syndrome 2, also known as atrial fibrillation with bradyarrhythmia or familial sinus bradycardia. Two pseudogenes have been identified on chromosome 15. [provided by RefSeq, Oct 2008]