HCN2 Products

Description

Hyperpolarization-activated cation channels of the HCN gene family such as HCN2, contribute to spontaneous rhythmic activity in both heart and brain. HCN2 is a member of a family of pacemaker channels activated by hyperpolarization and regulated by cyclic nucleotides. HCN1 and HCN2 play an important role for motor learning and neuronal integration by cerebellar Purkinje cells; as well as, shaping autonomous activity of single neurons and the periodicity of network oscillations. The HCN1 expression is highly enriched in cerebral cortex, hippocampus, cerebellum, and facial motor nucleus. HCN2 is highly abundant in mamillary bodies, pontine nucleus, ventral cochlear nucleus, and nucleus of the trapezoid body. These variations in regional specificity of HCN channels could generate important differences in neuronal pacemaker activity across brain systems. FUNCTION: 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). Produces a large instantaneous current. Activated by cAMP. Modulated by intracellular chloride ions and pH; acidic pH shifts the activation to more negative voltages. SUBUNIT: The potassium channel is probably composed of a homo- or heterotetrameric complex of pore-forming subunits. Heteromultimer with HCN1. Interacts with KCNE2. SUBCELLULAR LOCATION: Membrane; Multi-pass membrane protein. TISSUE SPECIFICITY: Highly expressed in neonatal and adult ventricle and in brain. Highly expressed in the pyramidal layer in hippocampus, in anterior dorsal nucleus in thalamus, in the mammillary nucleus in hypothalamus, in red nucleus, in trigeminal mesencephalic, spinal and principal nuclei, in cochlear and trapezoid nuclei and in the dorsal tegemental nucleus. INDUCTION: By thyroid hormones in hypothyroid animals. DOMAIN: The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position.

Bioinformatics

Entrez	114244 Rat 15166 Mouse 610 Human
Uniprot	NP_001185 Human Q9UL51 Human
Product By Gene ID	610
Alternate Names	BCNG2 BCNG-2 brain cyclic nucleotide gated channel 2 brain cyclic nucleotide-gated channel 2 HAC-1 hyperpolarization activated cyclic nucleotide-gated potassium channel 2 potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2