KCNJ8

KCNJ8
Identifiers
Aliases	KCNJ8, KIR6.1, uKATP-1, potassium voltage-gated channel subfamily J member 8
External IDs	MGI: 1100508 HomoloGene: 3654 GeneCards: KCNJ8
Targeted by Drug
minoxidil, glyburide, tolbutamide[1]
Gene ontology Molecular function • voltage-gated ion channel activity • sulfonylurea receptor binding • ATP binding • ATP-activated inward rectifier potassium channel activity • inward rectifier potassium channel activity Cellular component • integral component of membrane • membrane • intracellular membrane-bounded organelle • voltage-gated potassium channel complex • plasma membrane • myofibril • mitochondrion • ATP-sensitive potassium channel complex • sarcolemma Biological process • response to exogenous dsRNA • kidney development • regulation of ion transmembrane transport • vasodilation • ion transport • heart development • response to lipopolysaccharide • defense response to virus • transport • response to pH • potassium ion import • potassium ion transport • potassium ion transmembrane transport Sources:Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	3764	16523
Ensembl	ENSG00000121361	ENSMUSG00000030247
UniProt	Q15842	P97794
RefSeq (mRNA)	NM_004982	NM_008428
RefSeq (protein)	NP_004973.1	NP_032454.1
Location (UCSC)	Chr 12: 21.76 – 21.78 Mb	Chr 6: 142.56 – 142.57 Mb
PubMed search	[2]	[3]
Wikidata

View/Edit Human

View/Edit Mouse

Potassium inwardly-rectifying channel, subfamily J, member 8, also known as KCNJ8, is a human gene encoding the K_ir6.1 protein.^[4] A mutation in KCNJ8 has been associated with cardiac arrest in the early repolarization syndrome.

Potassium channels are present in most mammalian cells, where they participate in a wide range of physiologic responses. K_ir6.1 is an integral membrane protein and inward-rectifier type potassium channel. K_ir6.1, which has a greater tendency to allow potassium to flow into a cell rather than out of a cell, is controlled by G-proteins.^[4]

See also

• Inward-rectifier potassium ion channel

References

1. "Drugs that physically interact with ATP-sensitive inward rectifier potassium channel 8 view/edit references on wikidata".
2. "Human PubMed Reference:".
3. "Mouse PubMed Reference:".
4. "Entrez Gene: KCNJ8 potassium inwardly-rectifying channel, subfamily J, member 8".

Further reading

• Kubo Y, Adelman JP, Clapham DE, et al. (2006). "International Union of Pharmacology. LIV. Nomenclature and molecular relationships of inwardly rectifying potassium channels". Pharmacol. Rev. 57 (4): 509–526. doi:10.1124/pr.57.4.11. PMID 16382105.
• Inagaki N, Tsuura Y, Namba N, et al. (1995). "Cloning and functional characterization of a novel ATP-sensitive potassium channel ubiquitously expressed in rat tissues, including pancreatic islets, pituitary, skeletal muscle, and heart". J. Biol. Chem. 270 (11): 5691–5694. doi:10.1074/jbc.270.11.5691. PMID 7890693.
• Inagaki N, Inazawa J, Seino S (1996). "cDNA sequence, gene structure, and chromosomal localization of the human ATP-sensitive potassium channel, uKATP-1, gene (KCNJ8)". Genomics. 30 (1): 102–104. doi:10.1006/geno.1995.0018. PMID 8595887.
• Suzuki M, Kotake K, Fujikura K, et al. (1998). "Kir6.1: a possible subunit of ATP-sensitive K+ channels in mitochondria". Biochem. Biophys. Res. Commun. 241 (3): 693–697. doi:10.1006/bbrc.1997.7891. PMID 9434770.
• Erginel-Unaltuna N, Yang WP, Blanar MA (1998). "Genomic organization and expression of KCNJ8/Kir6.1, a gene encoding a subunit of an ATP-sensitive potassium channel". Gene. 211 (1): 71–78. doi:10.1016/S0378-1119(98)00086-9. PMID 9573340.
• Surah-Narwal S, Xu SZ, McHugh D, et al. (1999). "Block of human aorta Kir6.1 by the vascular KATP channel inhibitor U37883A". Br. J. Pharmacol. 128 (3): 667–672. doi:10.1038/sj.bjp.0702862. PMC 1571700. PMID 10516647.
• Tucker SJ, Ashcroft FM (1999). "Mapping of the physical interaction between the intracellular domains of an inwardly rectifying potassium channel, Kir6.2". J. Biol. Chem. 274 (47): 33393–33397. doi:10.1074/jbc.274.47.33393. PMID 10559219.
• Kono Y, Horie M, Takano M, et al. (2001). "The properties of the Kir6.1-6.2 tandem channel co-expressed with SUR2A". Pflugers Arch. 440 (5): 692–698. doi:10.1007/s004240000315. PMID 11007308.
• Cui Y, Giblin JP, Clapp LH, Tinker A (2001). "A mechanism for ATP-sensitive potassium channel diversity: Functional coassembly of two pore-forming subunits". Proc. Natl. Acad. Sci. U.S.A. 98 (2): 729–734. doi:10.1073/pnas.011370498. PMC 14656. PMID 11136227.
• Liu Y, Ren G, O'Rourke B, et al. (2001). "Pharmacological comparison of native mitochondrial K(ATP) channels with molecularly defined surface K(ATP) channels". Mol. Pharmacol. 59 (2): 225–30. PMID 11160857.
• Giblin JP, Cui Y, Clapp LH, Tinker A (2002). "Assembly limits the pharmacological complexity of ATP-sensitive potassium channels". J. Biol. Chem. 277 (16): 13717–13723. doi:10.1074/jbc.M112209200. PMID 11825905.
• Vanoye CG, MacGregor GG, Dong K, et al. (2002). "The carboxyl termini of K(ATP) channels bind nucleotides". J. Biol. Chem. 277 (26): 23260–23270. doi:10.1074/jbc.M112004200. PMID 11956191.
• Miki T, Suzuki M, Shibasaki T, et al. (2002). "Mouse model of Prinzmetal angina by disruption of the inward rectifier Kir6.1". Nat. Med. 8 (5): 466–472. doi:10.1038/nm0502-466. PMID 11984590.
• Nakamura K, Hirano J, Itazawa S, Kubokawa M (2002). "Protein kinase G activates inwardly rectifying K(+) channel in cultured human proximal tubule cells". Am. J. Physiol. Renal Physiol. 283 (4): F784–91. doi:10.1152/ajprenal.00023.2002. PMID 12217870.
• Curley M, Cairns MT, Friel AM, et al. (2003). "Expression of mRNA transcripts for ATP-sensitive potassium channels in human myometrium". Mol. Hum. Reprod. 8 (10): 941–945. doi:10.1093/molehr/8.10.941. PMID 12356945.
• 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): 16899–16903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Singh H, Hudman D, Lawrence CL, et al. (2004). "Distribution of Kir6.0 and SUR2 ATP-sensitive potassium channel subunits in isolated ventricular myocytes". J. Mol. Cell. Cardiol. 35 (5): 445–459. doi:10.1016/S0022-2828(03)00041-5. PMID 12738227.
• Insuk SO, Chae MR, Choi JW, et al. (2003). "Molecular basis and characteristics of KATP channel in human corporal smooth muscle cells". Int. J. Impot. Res. 15 (4): 258–266. doi:10.1038/sj.ijir.3901013. PMID 12934053.
• Emanuele E, Falcone C, Carabela M, et al. (2004). "Absence of Kir6.1/KCNJ8 mutations in Italian patients with abnormal coronary vasomotion". Int. J. Mol. Med. 12 (4): 509–12. doi:10.3892/ijmm.12.4.509. PMID 12964027.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–2127. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.

External links

• KCNJ8 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.