9r1t
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Structure of the human chimera HCN112 hyperpolarization-activated cyclic nucleotide-gated ion channel in complex with cAMP.
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Structural highlights
DiseaseHCN1_HUMAN Early infantile epileptic encephalopathy. The disease is caused by mutations affecting the gene represented in this entry. FunctionHCN2_MOUSE Hyperpolarization-activated ion channel exhibiting weak selectivity for potassium over sodium ions. Contributes to the native pacemaker currents in heart (If) and in neurons (Ih). Can also transport ammonium in the distal nephron. Produces a large instantaneous current. Activated by cAMP. Modulated by intracellular chloride ions and pH; acidic pH shifts the activation to more negative voltages.[1] HCN1_HUMAN Hyperpolarization-activated ion channel exhibiting weak selectivity for potassium over sodium ions. Contributes to the native pacemaker currents in heart (If) and in neurons (Ih). May mediate responses to sour stimuli.[2] References
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This page was last modified 04:57, 27 May 2026.