KCNH1

Potassium voltage-gated channel subfamily H member 1 is a protein that in humans is encoded by the KCNH1 gene.[5][6][7]

KCNH1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 5J7E
Identifiers
Aliases	KCNH1, EAG, EAG1, Kv10.1, h-eag, TMBTS, ZLS1, hEAG1, potassium voltage-gated channel subfamily H member 1, hEAG
External IDs	OMIM: 603305 MGI: 1341721 HomoloGene: 68242 GeneCards: KCNH1
Gene location (Human) Chr. Chromosome 1 (human)[1] Band 1q32.2 Start 210,676,823 bp[1] End 211,134,165 bp[1]
Gene location (Mouse) Chr. Chromosome 1 (mouse)[2] Band 1|1 H6 Start 192,190,774 bp[2] End 192,510,159 bp[2]
RNA expression pattern More reference expression data
Gene ontology Molecular function • phosphorelay sensor kinase activity • voltage-gated potassium channel activity • calmodulin binding • cyclic nucleotide binding • ion channel activity • potassium channel activity • voltage-gated ion channel activity • GO:0001948 protein binding • lipid binding • phosphatidylinositol bisphosphate binding • delayed rectifier potassium channel activity • identical protein binding • protein kinase binding • ion channel binding • protein heterodimerization activity • 14-3-3 protein binding Cellular component • synapse • integral component of membrane • cell nucleus • axon • nuclear inner membrane • presynaptic membrane • membrane • early endosome membrane • dendrite • cell membrane • endosome • voltage-gated potassium channel complex • GO:0097483, GO:0097481 postsynaptic density • cell junction • cell projection • perikaryon • intracellular membrane-bounded organelle • postsynaptic membrane • integral component of plasma membrane • cell surface • axolemma • potassium channel complex • neuronal cell body • perinuclear region of cytoplasm • integral component of presynaptic membrane Biological process • transmembrane transport • regulation of cell proliferation • potassium ion transport • signal transduction by protein phosphorylation • phosphorelay signal transduction system • regulation of ion transmembrane transport • ion transport • potassium ion transmembrane transport • myoblast fusion • regulation of membrane potential • phosphatidylinositol-mediated signaling • startle response • ion transmembrane transport • cellular response to calcium ion Sources:Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	3756	16510
Ensembl	ENSG00000143473	ENSMUSG00000058248
UniProt	O95259	Q60603
RefSeq (mRNA)	NM_002238 NM_172362	NM_001038607 NM_010600
RefSeq (protein)	NP_002229 NP_758872	NP_001033696 NP_034730
Location (UCSC)	Chr 1: 210.68 – 211.13 Mb	Chr 1: 192.19 – 192.51 Mb
PubMed search	[3]	[4]
Wikidata
View/Edit Human View/Edit Mouse

Voltage-gated potassium (Kv) channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. This gene encodes a member of the potassium channel, voltage-gated, subfamily H. This member is a pore-forming (alpha) subunit of a voltage-gated non-inactivating delayed rectifier potassium channel. It is activated at the onset of myoblast differentiation. The gene is highly expressed in brain and in myoblasts. Overexpression of the gene may confer a growth advantage to cancer cells and favor tumor cell proliferation. Alternative splicing of this gene results in two transcript variants encoding distinct isoforms.[7]

Interactions

KCNH1 has been shown to interact with KCNB1.[8]

Pathologies

A recent study has shown that de novo missense mutations in the KCNH1 gene results in deleterious gain of function, resulting in a multisystem developmental disorder known as Temple-Baraitser syndrome (TBS). TBS is categorized by intellectual disabilities, epilepsy, and aplasia of the nails. Simons et al. suggested that mutational mosaicism present in the mothers of some probands was responsible for their children's TBS phenotype. This is further evidence of the role that genetic mosaicism plays in the etiology of neurological disorders.[9]

See also

• Voltage-gated potassium channel

References

1. GRCh38: Ensembl release 89: ENSG00000143473 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000058248 - Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. Occhiodoro T, Bernheim L, Liu JH, Bijlenga P, Sinnreich M, Bader CR, Fischer-Lougheed J (Sep 1998). "Cloning of a human ether-a-go-go potassium channel expressed in myoblasts at the onset of fusion". FEBS Lett. 434 (1–2): 177–82. doi:10.1016/S0014-5793(98)00973-9. PMID 9738473.
6. Gutman GA, Chandy KG, Grissmer S, Lazdunski M, McKinnon D, Pardo LA, Robertson GA, Rudy B, Sanguinetti MC, Stuhmer W, Wang X (Dec 2005). "International Union of Pharmacology. LIII. Nomenclature and molecular relationships of voltage-gated potassium channels". Pharmacol Rev. 57 (4): 473–508. doi:10.1124/pr.57.4.10. PMID 16382104.
7. "Entrez Gene: KCNH1 potassium voltage-gated channel, subfamily H (eag-related), member 1".
8. Ottschytsch, N; Raes A; Van Hoorick D; Snyders D J (Jun 2002). "Obligatory heterotetramerization of three previously uncharacterized Kv channel α-subunits identified in the human genome". Proc. Natl. Acad. Sci. U.S.A. 99 (12): 7986–91. Bibcode:2002PNAS...99.7986O. doi:10.1073/pnas.122617999. ISSN 0027-8424. PMC 123007. PMID 12060745.
9. Simons, Cas; Rash, Lachlan D.; Crawford, Joanna; Ma, Linlin; Cristofori-Armstrong, Ben; Miller, David; Ru, Kelin; Baillie, Gregory J.; Alanay, Yasemin (January 2015). "Mutations in the voltage-gated potassium channel gene KCNH1 cause Temple-Baraitser syndrome and epilepsy". Nature Genetics. 47 (1): 73–77. doi:10.1038/ng.3153. ISSN 1061-4036. PMID 25420144.

Further reading

• Warmke JW, Ganetzky B (1994). "A family of potassium channel genes related to eag in Drosophila and mammals". Proc. Natl. Acad. Sci. U.S.A. 91 (8): 3438–42. Bibcode:1994PNAS...91.3438W. doi:10.1073/pnas.91.8.3438. PMC 43592. PMID 8159766.
• Hoshi N, Takahashi H, Shahidullah M, et al. (1998). "KCR1, a membrane protein that facilitates functional expression of non-inactivating K+ currents associates with rat EAG voltage-dependent K+ channels". J. Biol. Chem. 273 (36): 23080–5. doi:10.1074/jbc.273.36.23080. PMID 9722534.
• Pardo LA, del Camino D, Sánchez A, et al. (1999). "Oncogenic potential of EAG K(+) channels". EMBO J. 18 (20): 5540–7. doi:10.1093/emboj/18.20.5540. PMC 1171622. PMID 10523298.
• Schönherr R, Löber K, Heinemann SH (2000). "Inhibition of human ether à go-go potassium channels by Ca2+/calmodulin". EMBO J. 19 (13): 3263–71. doi:10.1093/emboj/19.13.3263. PMC 313935. PMID 10880439.
• Cayabyab FS, Schlichter LC (2002). "Regulation of an ERG K+ current by Src tyrosine kinase". J. Biol. Chem. 277 (16): 13673–81. doi:10.1074/jbc.M108211200. PMID 11834728.
• Schönherr R, Gessner G, Löber K, Heinemann SH (2002). "Functional distinction of human EAG1 and EAG2 potassium channels". FEBS Lett. 514 (2–3): 204–8. doi:10.1016/S0014-5793(02)02365-7. PMID 11943152.
• Ottschytsch N, Raes A, Van Hoorick D, Snyders DJ (2002). "Obligatory heterotetramerization of three previously uncharacterized Kv channel α-subunits identified in the human genome". Proc. Natl. Acad. Sci. U.S.A. 99 (12): 7986–91. Bibcode:2002PNAS...99.7986O. doi:10.1073/pnas.122617999. PMC 123007. PMID 12060745.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Farias LM, Ocaña DB, Díaz L, et al. (2004). "Ether a go-go potassium channels as human cervical cancer markers". Cancer Res. 64 (19): 6996–7001. doi:10.1158/0008-5472.CAN-04-1204. PMID 15466192.
• Kang J, Chen XL, Wang H, et al. (2005). "Discovery of a small molecule activator of the human ether-a-go-go-related gene (HERG) cardiac K+ channel". Mol. Pharmacol. 67 (3): 827–36. doi:10.1124/mol.104.006577. PMID 15548764.
• Ziechner U, Schönherr R, Born AK, et al. (2006). "Inhibition of human ether à go-go potassium channels by Ca2+/calmodulin binding to the cytosolic N- and C-termini". FEBS J. 273 (5): 1074–86. doi:10.1111/j.1742-4658.2006.05134.x. PMID 16478480.
• Weber C, Mello de Queiroz F, Downie BR, et al. (2006). "Silencing the activity and proliferative properties of the human EagI Potassium Channel by RNA Interference". J. Biol. Chem. 281 (19): 13030–7. doi:10.1074/jbc.M600883200. PMID 16537547.
• Mello de Queiroz F, Suarez-Kurtz G, Stühmer W, Pardo LA (2006). "Ether à go-go potassium channel expression in soft tissue sarcoma patients". Mol. Cancer. 5: 42. doi:10.1186/1476-4598-5-42. PMC 1618397. PMID 17022811.
• Ocorr K, Reeves NL, Wessells RJ, et al. (2007). "KCNQ potassium channel mutations cause cardiac arrhythmias in Drosophila that mimic the effects of aging". Proc. Natl. Acad. Sci. U.S.A. 104 (10): 3943–8. Bibcode:2007PNAS..104.3943O. doi:10.1073/pnas.0609278104. PMC 1820688. PMID 17360457.
• Ding XW, Yan JJ, An P, et al. (2007). "Aberrant expression of ether à go-go potassium channel in colorectal cancer patients and cell lines". World J. Gastroenterol. 13 (8): 1257–61. doi:10.3748/wjg.v13.i8.1257. PMC 4147004. PMID 17451210.
• Borowiec AS, Hague F, Harir N, et al. (2007). "IGF-1 activates hEAG K(+) channels through an Akt-dependent signaling pathway in breast cancer cells: role in cell proliferation". J. Cell. Physiol. 212 (3): 690–701. doi:10.1002/jcp.21065. PMID 17520698.

External links

• KCNH1+protein,+human at the US 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.