Hmdb loader
Identification
HMDB Protein ID HMDBP08736
Secondary Accession Numbers
  • 14459
Name ATP-sensitive inward rectifier potassium channel 12
Synonyms
  1. IRK-2
  2. Inward rectifier K(+) channel Kir2.2
  3. Inward rectifier K(+) channel Kir2.2v
  4. Potassium channel, inwardly rectifying subfamily J member 12
Gene Name KCNJ12
Protein Type Unknown
Biological Properties
General Function Involved in inward rectifier potassium channel activity
Specific Function Probably participates in establishing action potential waveform and excitability of neuronal and muscle tissues. Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. Can be blocked by extracellular barium and cesium
Pathways Not Available
Reactions Not Available
GO Classification
Component
membrane
cell part
Function
transmembrane transporter activity
substrate-specific transmembrane transporter activity
ion transmembrane transporter activity
transporter activity
ion channel activity
inward rectifier potassium channel activity
cation channel activity
potassium channel activity
voltage-gated potassium channel activity
Process
establishment of localization
transport
monovalent inorganic cation transport
potassium ion transport
ion transport
cation transport
Cellular Location
  1. Membrane
  2. Multi-pass membrane protein
Gene Properties
Chromosome Location Chromosome:1
Locus 17p11.2
SNPs KCNJ12
Gene Sequence
>1302 bp
ATGACCGCGGCCAGCCGGGCCAACCCCTACAGCATCGTGTCATCGGAGGAGGACGGGCTG
CACCTGGTCACCATGTCGGGCGCCAACGGCTTCGGCAACGGCAAGGTGCACACGCGGCGC
AGGTGCCGCAACCGCTTCGTCAAGAAGAATGGCCAGTGCAACATTGAGTTCGCCAACATG
GACGAGAAGTCACAGCGCTACCTGGCTGACATGTTCACCACCTGTGTGGACATCCGCTGG
CGGTACATGCTGCTCATCTTCTCGCTGGCCTTCCTTGCCTCCTGGCTGCTGTTCGGCATC
ATCTTCTGGGTCATCGCGGTGGCACACGGTGACCTGGAGCCGGCTGAGGGCCGGGGCCGC
ACACCCTGTGTGATGCAGGTGCACGGCTTCATGGCGGCCTTCCTCTTCTCCATCGAGACG
CAGACCACCATCGGCTACGGGCTGCGCTGTGTGACGGAGGAGTGCCCGGTGGCCGTCTTC
ATGGTGGTGGCCCAGTCCATCGTGGGCTGCATCATCGACTCCTTCATGATTGGTGCCATC
ATGGCCAAGATGGCAAGGCCCAAGAAGCGGGCACAGACGCTGCTGTTCAGCCACAACGCC
GTGGTGGCCCTGCGTGACGGCAAGCTCTGCCTCATGTGGCGTGTGGGTAACCTGCGCAAG
AGCCACATTGTGGAGGCCCATGTGCGCGCGCAGCTCATCAAGCCGCGGGTCACCGAGGAG
GGCGAGTACATCCCGCTGGACCAGATCGACATCGATGTGGGCTTCGACAAGGGCCTGGAC
CGCATCTTTCTGGTGTCGCCCATCACCATCTTGCATGAGATTGACGAGGCCAGCCCGCTC
TTCGGCATCAGCCGGCAGGACCTGGAGACGGACGACTTTGAGATCGTGGTCATCCTGGAA
GGCATGGTGGAGGCCACAGCCATGACCACCCAGGCCCGCAGCTCCTACCTGGCCAATGAG
ATCCTGTGGGGTCACCGCTTTGAGCCCGTGCTCTTCGAGGAGAAGAACCAGTACAAGATT
GACTACTCGCACTTCCACAAGACCTATGAGGTGCCCTCTACGCCCCGCTGCAGTGCGAAG
GATCTGGTAGAGAACAAGTTCCTGCTGCCCAGCGCCAACTCCTTCTGCTACGAGAACGAG
CTGGCCTTCCTGAGCCGTGACGAGGAGGATGAGGCGGACGGAGACCAGGACGGCCGAAGC
CGGGACGGCCTCAGCCCCCAGGCCAGGCATGACTTTGACAGACTCCAGGCTGGCGGCGGG
GTCCTGGAGCAGCGGCCCTACAGACGGGAGTCAGAGATCTGA
Protein Properties
Number of Residues 433
Molecular Weight 49000.6
Theoretical pI 5.79
Pfam Domain Function
Signals
  • None
Transmembrane Regions
  • 81-105
  • 158-179
Protein Sequence
>ATP-sensitive inward rectifier potassium channel 12
MTAASRANPYSIVSSEEDGLHLVTMSGANGFGNGKVHTRRRCRNRFVKKNGQCNIEFANM
DEKSQRYLADMFTTCVDIRWRYMLLIFSLAFLASWLLFGIIFWVIAVAHGDLEPAEGRGR
TPCVMQVHGFMAAFLFSIETQTTIGYGLRCVTEECPVAVFMVVAQSIVGCIIDSFMIGAI
MAKMARPKKRAQTLLFSHNAVVALRDGKLCLMWRVGNLRKSHIVEAHVRAQLIKPRVTEE
GEYIPLDQIDIDVGFDKGLDRIFLVSPITILHEIDEASPLFGISRQDLETDDFEIVVILE
GMVEATAMTTQARSSYLANEILWGHRFEPVLFEEKNQYKIDYSHFHKTYEVPSTPRCSAK
DLVENKFLLPSANSFCYENELAFLSRDEEDEADGDQDGRSRDGLSPQARHDFDRLQAGGG
VLEQRPYRRESEI
GenBank ID Protein 21693122
UniProtKB/Swiss-Prot ID Q14500
UniProtKB/Swiss-Prot Entry Name IRK12_HUMAN
PDB IDs Not Available
GenBank Gene ID AB074970
GeneCard ID KCNJ12
GenAtlas ID KCNJ12
HGNC ID HGNC:6258
References
General References
  1. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [PubMed:15489334 ]
  2. Dephoure N, Zhou C, Villen J, Beausoleil SA, Bakalarski CE, Elledge SJ, Gygi SP: A quantitative atlas of mitotic phosphorylation. Proc Natl Acad Sci U S A. 2008 Aug 5;105(31):10762-7. doi: 10.1073/pnas.0805139105. Epub 2008 Jul 31. [PubMed:18669648 ]
  3. Wible BA, De Biasi M, Majumder K, Taglialatela M, Brown AM: Cloning and functional expression of an inwardly rectifying K+ channel from human atrium. Circ Res. 1995 Mar;76(3):343-50. [PubMed:7859381 ]
  4. Namba N, Inagaki N, Gonoi T, Seino Y, Seino S: Kir2.2v: a possible negative regulator of the inwardly rectifying K+ channel Kir2.2. FEBS Lett. 1996 May 20;386(2-3):211-4. [PubMed:8647284 ]
  5. Kaibara M, Ishihara K, Doi Y, Hayashi H, Ehara T, Taniyama K: Identification of human Kir2.2 (KCNJ12) gene encoding functional inward rectifier potassium channel in both mammalian cells and Xenopus oocytes. FEBS Lett. 2002 Nov 6;531(2):250-4. [PubMed:12417321 ]
  6. Gallagher PG, Forget BG: An alternate promoter directs expression of a truncated, muscle-specific isoform of the human ankyrin 1 gene. J Biol Chem. 1998 Jan 16;273(3):1339-48. [PubMed:9430667 ]