HCN2

HCN2
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2MPF, 3U10
Identifiers
Aliases	HCN2, BCNG-2, BCNG2, HAC-1, hyperpolarization activated cyclic nucleotide gated potassium channel 2, hyperpolarization activated cyclic nucleotide gated potassium and sodium channel 2, EIG17, FEB2, GEFSP11
External IDs	OMIM: 602781; MGI: 1298210; HomoloGene: 31022; GeneCards: HCN2; OMA:HCN2 - orthologs
Gene location (Human) Chr. Chromosome 19 (human) Band 19p13.3 Start 589,881 bp End 617,159 bp
Gene location (Mouse) Chr. Chromosome 10 (mouse) Band 10|10 C1 Start 79,552,468 bp End 79,571,942 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in C1 segment right frontal lobe putamen nucleus accumbens anterior cingulate cortex caudate nucleus Brodmann area 10 Brodmann area 9 amygdala right hemisphere of cerebellum Top expressed in perirhinal cortex entorhinal cortex primary visual cortex superior frontal gyrus CA3 field choroid plexus of fourth ventricle central gray substance of midbrain cerebellar cortex medulla oblongata lumbar subsegment of spinal cord More reference expression data BioGPS More reference expression data
Gene ontology Molecular function nucleotide binding potassium channel activity cAMP binding sodium channel activity voltage-gated ion channel activity ion channel activity intracellular cAMP-activated cation channel activity identical protein binding voltage-gated potassium channel activity voltage-gated sodium channel activity protein binding Cellular component integral component of membrane membrane voltage-gated potassium channel complex plasma membrane integral component of plasma membrane HCN channel complex Biological process cellular response to cGMP sodium ion transmembrane transport sodium ion transport cell-cell signaling regulation of membrane potential regulation of ion transmembrane transport ion transport potassium ion transport transmembrane transport potassium ion transmembrane transport cellular response to cAMP membrane depolarization during cardiac muscle cell action potential sodium ion import across plasma membrane potassium ion import across plasma membrane Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 610 15166 Ensembl ENSG00000099822 ENSMUSG00000020331 UniProt Q9UL51 O88703 RefSeq (mRNA) NM_001194 NM_008226 RefSeq (protein) NP_001185 NP_032252 Location (UCSC) Chr 19: 0.59 – 0.62 Mb Chr 10: 79.55 – 79.57 Mb PubMed search
Wikidata
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Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated ion channel 2 is a protein that in humans is encoded by the HCN2 gene.

Interactions

HCN2 has been shown to interact with HCN1 and HCN4.

Function

The function of the channel is not known although its activation by hyperpolarization alludes to the funny channels in the sinoatrial node of the heart (which form the basis of spontaneous generation of electrical rhythm). These channels have recently been associated with chronic pain and blocking the gene is associated with resolution of neuropathic episodes of pain.

See also

• Cyclic nucleotide-gated ion channel

Further reading

• Kleiderlein JJ, Nisson PE, Jessee J, Li WB, Becker KG, Derby ML, Ross CA, Margolis RL (Dec 1998). "CCG repeats in cDNAs from human brain". Human Genetics. 103 (6): 666–73. doi:10.1007/s004390050889. PMID 9921901. S2CID 23696667.
• Ludwig A, Zong X, Stieber J, Hullin R, Hofmann F, Biel M (May 1999). "Two pacemaker channels from human heart with profoundly different activation kinetics". The EMBO Journal. 18 (9): 2323–9. doi:10.1093/emboj/18.9.2323. PMC 1171315. PMID 10228147.
• Vaccari T, Moroni A, Rocchi M, Gorza L, Bianchi ME, Beltrame M, DiFrancesco D (Sep 1999). "The human gene coding for HCN2, a pacemaker channel of the heart". Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression. 1446 (3): 419–25. doi:10.1016/s0167-4781(99)00092-5. hdl:11577/134307. PMID 10524219.
• Hartley JL, Temple GF, Brasch MA (Nov 2000). "DNA cloning using in vitro site-specific recombination". Genome Research. 10 (11): 1788–95. doi:10.1101/gr.143000. PMC 310948. PMID 11076863.
• Ulens C, Tytgat J (Mar 2001). "Functional heteromerization of HCN1 and HCN2 pacemaker channels". The Journal of Biological Chemistry. 276 (9): 6069–72. doi:10.1074/jbc.C000738200. PMID 11133998.
• Proenza C, Tran N, Angoli D, Zahynacz K, Balcar P, Accili EA (Aug 2002). "Different roles for the cyclic nucleotide binding domain and amino terminus in assembly and expression of hyperpolarization-activated, cyclic nucleotide-gated channels". The Journal of Biological Chemistry. 277 (33): 29634–42. doi:10.1074/jbc.M200504200. PMID 12034718.
• Qu J, Altomare C, Bucchi A, DiFrancesco D, Robinson RB (Aug 2002). "Functional comparison of HCN isoforms expressed in ventricular and HEK 293 cells". Pflügers Archiv. 444 (5): 597–601. doi:10.1007/s00424-002-0860-7. PMID 12194012. S2CID 508732.
• Sesti F, Rajan S, Gonzalez-Colaso R, Nikolaeva N, Goldstein SA (Apr 2003). "Hyperpolarization moves S4 sensors inward to open MVP, a methanococcal voltage-gated potassium channel". Nature Neuroscience. 6 (4): 353–61. doi:10.1038/nn1028. PMID 12640457. S2CID 22130861.
• Stieber J, Thomer A, Much B, Schneider A, Biel M, Hofmann F (Sep 2003). "Molecular basis for the different activation kinetics of the pacemaker channels HCN2 and HCN4". The Journal of Biological Chemistry. 278 (36): 33672–80. doi:10.1074/jbc.M305318200. PMID 12813043.
• Bender RA, Soleymani SV, Brewster AL, Nguyen ST, Beck H, Mathern GW, Baram TZ (Jul 2003). "Enhanced expression of a specific hyperpolarization-activated cyclic nucleotide-gated cation channel (HCN) in surviving dentate gyrus granule cells of human and experimental epileptic hippocampus". The Journal of Neuroscience. 23 (17): 6826–36. doi:10.1523/JNEUROSCI.23-17-06826.2003. PMC 3100807. PMID 12890777.
• Much B, Wahl-Schott C, Zong X, Schneider A, Baumann L, Moosmang S, Ludwig A, Biel M (Oct 2003). "Role of subunit heteromerization and N-linked glycosylation in the formation of functional hyperpolarization-activated cyclic nucleotide-gated channels". The Journal of Biological Chemistry. 278 (44): 43781–6. doi:10.1074/jbc.M306958200. PMID 12928435.
• Michels G, Er F, Khan I, Südkamp M, Herzig S, Hoppe UC (Feb 2005). "Single-channel properties support a potential contribution of hyperpolarization-activated cyclic nucleotide-gated channels and If to cardiac arrhythmias". Circulation. 111 (4): 399–404. doi:10.1161/01.CIR.0000153799.65783.3A. PMID 15687126.
• Akhavan A, Atanasiu R, Noguchi T, Han W, Holder N, Shrier A (Jul 2005). "Identification of the cyclic-nucleotide-binding domain as a conserved determinant of ion-channel cell-surface localization". Journal of Cell Science. 118 (Pt 13): 2803–12. doi:10.1242/jcs.02423. PMID 15961404.
• Calloe K, Elmedyb P, Olesen SP, Jorgensen NK, Grunnet M (Sep 2005). "Hypoosmotic cell swelling as a novel mechanism for modulation of cloned HCN2 channels". Biophysical Journal. 89 (3): 2159–69. Bibcode:2005BpJ....89.2159C. doi:10.1529/biophysj.105.063792. PMC 1366717. PMID 15980171.

External links

• HCN2+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.