Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4

UniProtKB accession:  Q9Y3Q4

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UniProtKB description:  Hyperpolarization-activated ion channel that are permeable to Na(+) and K(+) ions with very slow activation and inactivation (PubMed:10228147, PubMed:10430953, PubMed:20829353). Exhibits higher selectivity for K(+) over Na(+) ions (PubMed:10228147). Contributes to the native pacemaker currents in heart (If) that regulate the rhythm of heart beat (Probable) (PubMed:10228147, PubMed:16407510, PubMed:19165230). Contributes to the native pacemaker currents in neurons (Ih) (Probable). May mediate responses to sour stimuli (By similarity).