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Identification
HMDB Protein ID HMDBP02530
Secondary Accession Numbers
  • 8028
Name Potassium voltage-gated channel subfamily KQT member 1
Synonyms
  1. IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1
  2. KQT-like 1
  3. Voltage-gated potassium channel subunit Kv7.1
Gene Name KCNQ1
Protein Type Unknown
Biological Properties
General Function Involved in ion channel activity
Specific Function Probably important in cardiac repolarization. Associates with KCNE1 (MinK) to form the I(Ks) cardiac potassium current. Elicits a rapidly activating, potassium-selective outward current. Muscarinic agonist oxotremorine-M strongly suppresses KCNQ1/KCNE1 current in CHO cells in which cloned KCNQ1/KCNE1 channels were coexpressed with M1 muscarinic receptors. May associate also with KCNE3 (MiRP2) to form the potassium channel that is important for cyclic AMP-stimulated intestinal secretion of chloride ions, which is reduced in cystic fibrosis and pathologically stimulated in cholera and other forms of secretory diarrhea
Pathways
  • Acebutolol Action Pathway
  • Alprenolol Action Pathway
  • Amiodarone Action Pathway
  • Amlodipine Action Pathway
  • Arbutamine Action Pathway
  • Atenolol Action Pathway
  • Betaxolol Action Pathway
  • Bevantolol Action Pathway
  • Bisoprolol Action Pathway
  • Bopindolol Action Pathway
  • Bupranolol Action Pathway
  • Carteolol Action Pathway
  • Carvedilol Action Pathway
  • Diltiazem Action Pathway
  • Disopyramide Action Pathway
  • Dobutamine Action Pathway
  • Epinephrine Action Pathway
  • Esmolol Action Pathway
  • Felodipine Action Pathway
  • Flecainide Action Pathway
  • Fosphenytoin (Antiarrhythmic) Action Pathway
  • Ibutilide Action Pathway
  • Isoprenaline Action Pathway
  • Isradipine Action Pathway
  • Labetalol Action Pathway
  • Levobunolol Action Pathway
  • Lidocaine (Antiarrhythmic) Action Pathway
  • Metipranolol Action Pathway
  • Metoprolol Action Pathway
  • Mexiletine Action Pathway
  • Muscle/Heart Contraction
  • Nadolol Action Pathway
  • Nebivolol Action Pathway
  • Nifedipine Action Pathway
  • Nimodipine Action Pathway
  • Nisoldipine Action Pathway
  • Nitrendipine Action Pathway
  • Oxprenolol Action Pathway
  • Penbutolol Action Pathway
  • Phenytoin (Antiarrhythmic) Action Pathway
  • Pindolol Action Pathway
  • Practolol Action Pathway
  • Procainamide (Antiarrhythmic) Action Pathway
  • Propranolol Action Pathway
  • Quinidine Action Pathway
  • Sotalol Action Pathway
  • Timolol Action Pathway
  • Tocainide Action Pathway
  • Verapamil Action Pathway
Reactions Not Available
GO Classification
Component
membrane
cell part
ion channel complex
cation channel complex
potassium channel complex
voltage-gated potassium channel complex
macromolecular complex
protein complex
Function
transmembrane transporter activity
substrate-specific transmembrane transporter activity
ion transmembrane transporter activity
transporter activity
ion channel activity
cation channel activity
potassium channel activity
voltage-gated potassium channel activity
Process
establishment of localization
transport
transmembrane transport
monovalent inorganic cation transport
potassium ion transport
ion transport
cation transport
Cellular Location
  1. Cell membrane
  2. Multi-pass membrane protein
  3. Multi-pass membrane protein
  4. Cytoplasmic vesicle membrane
Gene Properties
Chromosome Location Chromosome:1
Locus 11p15.5
SNPs KCNQ1
Gene Sequence
>2031 bp
ATGGCCGCGGCCTCCTCCCCGCCCAGGGCCGAGAGGAAGCGCTGGGGTTGGGGCCGCCTG
CCAGGCGCCCGGCGGGGCAGCGCGGGCCTGGCCAAGAAGTGCCCCTTCTCGCTGGAGCTG
GCGGAGGGCGGCCCGGCGGGCGGCGCGCTCTACGCGCCCATCGCGCCCGGCGCCCCAGGT
CCCGCGCCCCCTGCGTCCCCGGCCGCGCCCGCCGCGCCCCCAGTTGCCTCCGACCTTGGC
CCGCGGCCGCCGGTGAGCCTAGACCCGCGCGTCTCCATTTACAGCACGCGCCGCCCGGTG
TTGGCGCGCACCCACGTCCAGGGCCGCGTCTACAACTTCCTCGAGCGTCCCACCGGCTGG
AAATGCTTCGTTTACCACTTCGCCGTCTTCCTCATCGTCCTGGTCTGCCTCATCTTCAGC
GTGCTGTCCACCATCGAGCAGTATGCCGCCCTGGCCACGGGGACTCTCTTCTGGATGGAG
ATCGTGCTGGTGGTGTTCTTCGGGACGGAGTACGTGGTCCGCCTCTGGTCCGCCGGCTGC
CGCAGCAAGTACGTGGGCCTCTGGGGGCGGCTGCGCTTTGCCCGGAAGCCCATTTCCATC
ATCGACCTCATCGTGGTCGTGGCCTCCATGGTGGTCCTCTGCGTGGGCTCCAAGGGGCAG
GTGTTTGCCACGTCGGCCATCAGGGGCATCCGCTTCCTGCAGATCCTGAGGATGCTACAC
GTCGACCGCCAGGGAGGCACCTGGAGGCTCCTGGGCTCCGTGGTCTTCATCCACCGCCAG
GAGCTGATAACCACCCTGTACATCGGCTTCCTGGGCCTCATCTTCTCCTCGTACTTTGTG
TACCTGGCTGAGAAGGACGCGGTGAACGAGTCAGGCCGCGTGGAGTTCGGCAGCTACGCA
GATGCGCTGTGGTGGGGGGTGGTCACAGTCACCACCATCGGCTATGGGGACAAGGTGCCC
CAGACGTGGGTCGGGAAGACCATCGCCTCCTGCTTCTCTGTCTTTGCCATCTCCTTCTTT
GCGCTCCCAGCGGGGATTCTTGGCTCGGGGTTTGCCCTGAAGGTGCAGCAGAAGCAGAGG
CAGAAGCACTTCAACCGGCAGATCCCGGCGGCAGCCTCACTCATTCAGACCGCATGGAGG
TGCTATGCTGCCGAGAACCCCGACTCCTCCACCTGGAAGATCTACATCCGGAAGGCCCCC
CGGAGCCACACTCTGCTGTCACCCAGCCCCAAACCCAAGAAGTCTGTGGTGGTAAAGAAA
AAAAAGTTCAAGCTGGACAAAGACAATGGGGTGACTCCTGGAGAGAAGATGCTCACAGTC
CCCCATATCACGTGCGACCCCCCAGAAGAGCGGCGGCTGGACCACTTCTCTGTCGACGGC
TATGACAGTTCTGTAAGGAAGAGCCCAACACTGCTGGAAGTGAGCATGCCCCATTTCATG
AGAACCAACAGCTTCGCCGAGGACCTGGACCTGGAAGGGGAGACTCTGCTGACACCCATC
ACCCACATCTCACAGCTGCGGGAACACCATCGGGCCACCATTAAGGTCATTCGACGCATG
CAGTACTTTGTGGCCAAGAAGAAATTCCAGCAAGCGCGGAAGCCTTACGATGTGCGGGAC
GTCATTGAGCAGTACTCGCAGGGCCACCTCAACCTCATGGTGCGCATCAAGGAGCTGCAG
AGGAGGCTGGACCAGTCCATTGGGAAGCCCTCACTGTTCATCTCCGTCTCAGAAAAGAGC
AAGGATCGCGGCAGCAACACGATCGGCGCCCGCCTGAACCGAGTAGAAGACAAGGTGACG
CAGCTGGACCAGAGGCTGGCACTCATCACCGACATGCTTCACCAGCTGCTCTCCTTGCAC
GGTGGCAGCACCCCCGGCAGCGGCGGCCCCCCCAGAGAGGGCGGGGCCCACATCACCCAG
CCCTGCGGCAGTGGCGGCTCCGTCGACCCTGAGCTCTTCCTGCCCAGCAACACCCTGCCC
ACCTACGAGCAGCTGACCGTGCCCAGGAGGGGCCCCGATGAGGGGTCCTGA
Protein Properties
Number of Residues 676
Molecular Weight 74697.9
Theoretical pI 10.39
Pfam Domain Function
Signals
  • None
Transmembrane Regions
  • 122-142
  • 148-168
  • 197-217
  • 226-248
  • 262-282
  • 328-348
Protein Sequence
>Potassium voltage-gated channel subfamily KQT member 1
MAAASSPPRAERKRWGWGRLPGARRGSAGLAKKCPFSLELAEGGPAGGALYAPIAPGAPG
PAPPASPAAPAAPPVASDLGPRPPVSLDPRVSIYSTRRPVLARTHVQGRVYNFLERPTGW
KCFVYHFAVFLIVLVCLIFSVLSTIEQYAALATGTLFWMEIVLVVFFGTEYVVRLWSAGC
RSKYVGLWGRLRFARKPISIIDLIVVVASMVVLCVGSKGQVFATSAIRGIRFLQILRMLH
VDRQGGTWRLLGSVVFIHRQELITTLYIGFLGLIFSSYFVYLAEKDAVNESGRVEFGSYA
DALWWGVVTVTTIGYGDKVPQTWVGKTIASCFSVFAISFFALPAGILGSGFALKVQQKQR
QKHFNRQIPAAASLIQTAWRCYAAENPDSSTWKIYIRKAPRSHTLLSPSPKPKKSVVVKK
KKFKLDKDNGVTPGEKMLTVPHITCDPPEERRLDHFSVDGYDSSVRKSPTLLEVSMPHFM
RTNSFAEDLDLEGETLLTPITHISQLREHHRATIKVIRRMQYFVAKKKFQQARKPYDVRD
VIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFISVSEKSKDRGSNTIGARLNRVEDKVT
QLDQRLALITDMLHQLLSLHGGSTPGSGGPPREGGAHITQPCGSGGSVDPELFLPSNTLP
TYEQLTVPRRGPDEGS
GenBank ID Protein Not Available
UniProtKB/Swiss-Prot ID P51787
UniProtKB/Swiss-Prot Entry Name KCNQ1_HUMAN
PDB IDs Not Available
GenBank Gene ID AF000571
GeneCard ID KCNQ1
GenAtlas ID KCNQ1
HGNC ID HGNC:6294
References
General References
  1. Tanaka T, Nagai R, Tomoike H, Takata S, Yano K, Yabuta K, Haneda N, Nakano O, Shibata A, Sawayama T, Kasai H, Yazaki Y, Nakamura Y: Four novel KVLQT1 and four novel HERG mutations in familial long-QT syndrome. Circulation. 1997 Feb 4;95(3):565-7. [PubMed:9024139 ]
  2. Splawski I, Shen J, Timothy KW, Vincent GM, Lehmann MH, Keating MT: Genomic structure of three long QT syndrome genes: KVLQT1, HERG, and KCNE1. Genomics. 1998 Jul 1;51(1):86-97. [PubMed:9693036 ]
  3. Jongbloed RJ, Wilde AA, Geelen JL, Doevendans P, Schaap C, Van Langen I, van Tintelen JP, Cobben JM, Beaufort-Krol GC, Geraedts JP, Smeets HJ: Novel KCNQ1 and HERG missense mutations in Dutch long-QT families. Hum Mutat. 1999;13(4):301-10. [PubMed:10220144 ]
  4. Splawski I, Shen J, Timothy KW, Lehmann MH, Priori S, Robinson JL, Moss AJ, Schwartz PJ, Towbin JA, Vincent GM, Keating MT: Spectrum of mutations in long-QT syndrome genes. KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Circulation. 2000 Sep 5;102(10):1178-85. [PubMed:10973849 ]
  5. Chouabe C, Neyroud N, Guicheney P, Lazdunski M, Romey G, Barhanin J: Properties of KvLQT1 K+ channel mutations in Romano-Ward and Jervell and Lange-Nielsen inherited cardiac arrhythmias. EMBO J. 1997 Sep 1;16(17):5472-9. [PubMed:9312006 ]
  6. Itoh T, Tanaka T, Nagai R, Kikuchi K, Ogawa S, Okada S, Yamagata S, Yano K, Yazaki Y, Nakamura Y: Genomic organization and mutational analysis of KVLQT1, a gene responsible for familial long QT syndrome. Hum Genet. 1998 Sep;103(3):290-4. [PubMed:9799083 ]
  7. Neyroud N, Richard P, Vignier N, Donger C, Denjoy I, Demay L, Shkolnikova M, Pesce R, Chevalier P, Hainque B, Coumel P, Schwartz K, Guicheney P: Genomic organization of the KCNQ1 K+ channel gene and identification of C-terminal mutations in the long-QT syndrome. Circ Res. 1999 Feb 19;84(3):290-7. [PubMed:10024302 ]
  8. Yang WP, Levesque PC, Little WA, Conder ML, Shalaby FY, Blanar MA: KvLQT1, a voltage-gated potassium channel responsible for human cardiac arrhythmias. Proc Natl Acad Sci U S A. 1997 Apr 15;94(8):4017-21. [PubMed:9108097 ]
  9. Sanguinetti MC, Curran ME, Zou A, Shen J, Spector PS, Atkinson DL, Keating MT: Coassembly of K(V)LQT1 and minK (IsK) proteins to form cardiac I(Ks) potassium channel. Nature. 1996 Nov 7;384(6604):80-3. [PubMed:8900283 ]
  10. Wang Q, Curran ME, Splawski I, Burn TC, Millholland JM, VanRaay TJ, Shen J, Timothy KW, Vincent GM, de Jager T, Schwartz PJ, Toubin JA, Moss AJ, Atkinson DL, Landes GM, Connors TD, Keating MT: Positional cloning of a novel potassium channel gene: KVLQT1 mutations cause cardiac arrhythmias. Nat Genet. 1996 Jan;12(1):17-23. [PubMed:8528244 ]
  11. Jiang M, Tseng-Crank J, Tseng GN: Suppression of slow delayed rectifier current by a truncated isoform of KvLQT1 cloned from normal human heart. J Biol Chem. 1997 Sep 26;272(39):24109-12. [PubMed:9305853 ]
  12. Shalaby FY, Levesque PC, Yang WP, Little WA, Conder ML, Jenkins-West T, Blanar MA: Dominant-negative KvLQT1 mutations underlie the LQT1 form of long QT syndrome. Circulation. 1997 Sep 16;96(6):1733-6. [PubMed:9323054 ]
  13. Selyanko AA, Hadley JK, Wood IC, Abogadie FC, Jentsch TJ, Brown DA: Inhibition of KCNQ1-4 potassium channels expressed in mammalian cells via M1 muscarinic acetylcholine receptors. J Physiol. 2000 Feb 1;522 Pt 3:349-55. [PubMed:10713961 ]
  14. Schmitt N, Schwarz M, Peretz A, Abitbol I, Attali B, Pongs O: A recessive C-terminal Jervell and Lange-Nielsen mutation of the KCNQ1 channel impairs subunit assembly. EMBO J. 2000 Feb 1;19(3):332-40. [PubMed:10654932 ]
  15. Schroeder BC, Waldegger S, Fehr S, Bleich M, Warth R, Greger R, Jentsch TJ: A constitutively open potassium channel formed by KCNQ1 and KCNE3. Nature. 2000 Jan 13;403(6766):196-9. [PubMed:10646604 ]
  16. Wiener R, Haitin Y, Shamgar L, Fernandez-Alonso MC, Martos A, Chomsky-Hecht O, Rivas G, Attali B, Hirsch JA: The KCNQ1 (Kv7.1) COOH terminus, a multitiered scaffold for subunit assembly and protein interaction. J Biol Chem. 2008 Feb 29;283(9):5815-30. doi: 10.1074/jbc.M707541200. Epub 2007 Dec 29. [PubMed:18165683 ]
  17. Tranebjaerg L, Bathen J, Tyson J, Bitner-Glindzicz M: Jervell and Lange-Nielsen syndrome: a Norwegian perspective. Am J Med Genet. 1999 Sep 24;89(3):137-46. [PubMed:10704188 ]
  18. Russell MW, Dick M 2nd, Collins FS, Brody LC: KVLQT1 mutations in three families with familial or sporadic long QT syndrome. Hum Mol Genet. 1996 Sep;5(9):1319-24. [PubMed:8872472 ]
  19. de Jager T, Corbett CH, Badenhorst JC, Brink PA, Corfield VA: Evidence of a long QT founder gene with varying phenotypic expression in South African families. J Med Genet. 1996 Jul;33(7):567-73. [PubMed:8818942 ]
  20. Donger C, Denjoy I, Berthet M, Neyroud N, Cruaud C, Bennaceur M, Chivoret G, Schwartz K, Coumel P, Guicheney P: KVLQT1 C-terminal missense mutation causes a forme fruste long-QT syndrome. Circulation. 1997 Nov 4;96(9):2778-81. [PubMed:9386136 ]
  21. van den Berg MH, Wilde AA, Robles de Medina EO, Meyer H, Geelen JL, Jongbloed RJ, Wellens HJ, Geraedts JP: The long QT syndrome: a novel missense mutation in the S6 region of the KVLQT1 gene. Hum Genet. 1997 Sep;100(3-4):356-61. [PubMed:9272155 ]
  22. Wollnik B, Schroeder BC, Kubisch C, Esperer HD, Wieacker P, Jentsch TJ: Pathophysiological mechanisms of dominant and recessive KVLQT1 K+ channel mutations found in inherited cardiac arrhythmias. Hum Mol Genet. 1997 Oct;6(11):1943-9. [PubMed:9302275 ]
  23. Li H, Chen Q, Moss AJ, Robinson J, Goytia V, Perry JC, Vincent GM, Priori SG, Lehmann MH, Denfield SW, Duff D, Kaine S, Shimizu W, Schwartz PJ, Wang Q, Towbin JA: New mutations in the KVLQT1 potassium channel that cause long-QT syndrome. Circulation. 1998 Apr 7;97(13):1264-9. [PubMed:9570196 ]
  24. Priori SG, Schwartz PJ, Napolitano C, Bianchi L, Dennis A, De Fusco M, Brown AM, Casari G: A recessive variant of the Romano-Ward long-QT syndrome? Circulation. 1998 Jun 23;97(24):2420-5. [PubMed:9641694 ]
  25. Neyroud N, Denjoy I, Donger C, Gary F, Villain E, Leenhardt A, Benali K, Schwartz K, Coumel P, Guicheney P: Heterozygous mutation in the pore of potassium channel gene KvLQT1 causes an apparently normal phenotype in long QT syndrome. Eur J Hum Genet. 1998 Mar-Apr;6(2):129-33. [PubMed:9781056 ]
  26. Saarinen K, Swan H, Kainulainen K, Toivonen L, Viitasalo M, Kontula K: Molecular genetics of the long QT syndrome: two novel mutations of the KVLQT1 gene and phenotypic expression of the mutant gene in a large kindred. Hum Mutat. 1998;11(2):158-65. [PubMed:9482580 ]
  27. Ackerman MJ, Schroeder JJ, Berry R, Schaid DJ, Porter CJ, Michels VV, Thibodeau SN: A novel mutation in KVLQT1 is the molecular basis of inherited long QT syndrome in a near-drowning patient's family. Pediatr Res. 1998 Aug;44(2):148-53. [PubMed:9702906 ]
  28. Mohammad-Panah R, Demolombe S, Neyroud N, Guicheney P, Kyndt F, van den Hoff M, Baro I, Escande D: Mutations in a dominant-negative isoform correlate with phenotype in inherited cardiac arrhythmias. Am J Hum Genet. 1999 Apr;64(4):1015-23. [PubMed:10090886 ]
  29. Denjoy I, Lupoglazoff JM, Donger C, Berthet M, Richard P, Neyroud N, Villain E, Lucet V, Coumel P, Guicheney P: [Congenital long QT syndrome. The value of genetics in prognostic evaluation]. Arch Mal Coeur Vaiss. 1999 May;92(5):557-63. [PubMed:10367071 ]
  30. Priori SG, Napolitano C, Schwartz PJ: Low penetrance in the long-QT syndrome: clinical impact. Circulation. 1999 Feb 2;99(4):529-33. [PubMed:9927399 ]
  31. Larsen LA, Fosdal I, Andersen PS, Kanters JK, Vuust J, Wettrell G, Christiansen M: Recessive Romano-Ward syndrome associated with compound heterozygosity for two mutations in the KVLQT1 gene. Eur J Hum Genet. 1999 Sep;7(6):724-8. [PubMed:10482963 ]
  32. Larsen LA, Christiansen M, Vuust J, Andersen PS: High-throughput single-strand conformation polymorphism analysis by automated capillary electrophoresis: robust multiplex analysis and pattern-based identification of allelic variants. Hum Mutat. 1999;13(4):318-27. [PubMed:10220146 ]
  33. Franqueza L, Lin M, Shen J, Splawski I, Keating MT, Sanguinetti MC: Long QT syndrome-associated mutations in the S4-S5 linker of KvLQT1 potassium channels modify gating and interaction with minK subunits. J Biol Chem. 1999 Jul 23;274(30):21063-70. [PubMed:10409658 ]
  34. Chouabe C, Neyroud N, Richard P, Denjoy I, Hainque B, Romey G, Drici MD, Guicheney P, Barhanin J: Novel mutations in KvLQT1 that affect Iks activation through interactions with Isk. Cardiovasc Res. 2000 Mar;45(4):971-80. [PubMed:10728423 ]
  35. Chen YH, Xu SJ, Bendahhou S, Wang XL, Wang Y, Xu WY, Jin HW, Sun H, Su XY, Zhuang QN, Yang YQ, Li YB, Liu Y, Xu HJ, Li XF, Ma N, Mou CP, Chen Z, Barhanin J, Huang W: KCNQ1 gain-of-function mutation in familial atrial fibrillation. Science. 2003 Jan 10;299(5604):251-4. [PubMed:12522251 ]
  36. Bellocq C, van Ginneken AC, Bezzina CR, Alders M, Escande D, Mannens MM, Baro I, Wilde AA: Mutation in the KCNQ1 gene leading to the short QT-interval syndrome. Circulation. 2004 May 25;109(20):2394-7. [PubMed:15159330 ]