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HMDB Protein ID HMDBP10842
Secondary Accession Numbers
  • 17132
Name Potassium voltage-gated channel subfamily E member 2
  1. MinK-related peptide 1
  2. Minimum potassium ion channel-related peptide 1
  3. Potassium channel subunit beta MiRP1
Gene Name KCNE2
Protein Type Unknown
Biological Properties
General Function Involved in voltage-gated potassium channel activity
Specific Function Ancillary protein that assembles as a beta subunit with a voltage-gated potassium channel complex of pore-forming alpha subunits. Modulates the gating kinetics and enhances stability of the channel complex. Associated with KCNH2/HERG is proposed to form the rapidly activating component of the delayed rectifying potassium current in heart (IKr). May associate with KCNQ2 and/or KCNQ3 and modulate the native M-type current. May associate with KCNQ1/KVLTQ1 and elicit a voltage-independent current. May associate with HCN1 and HCN2 and increase potassium current
  • 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
cell part
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
establishment of localization
monovalent inorganic cation transport
potassium ion transport
ion transport
cation transport
Cellular Location
  1. Membrane
  2. Single-pass type I membrane protein
Gene Properties
Chromosome Location Chromosome:2
Locus 21q22.12
Gene Sequence
>372 bp
Protein Properties
Number of Residues 123
Molecular Weight 14471.4
Theoretical pI 5.65
Pfam Domain Function
  • None
Transmembrane Regions
  • 49-69
Protein Sequence
>Potassium voltage-gated channel subfamily E member 2
GenBank ID Protein 4704423
UniProtKB/Swiss-Prot ID Q9Y6J6
UniProtKB/Swiss-Prot Entry Name KCNE2_HUMAN
PDB IDs Not Available
GenBank Gene ID AF071002
GeneCard ID KCNE2
GenAtlas ID KCNE2
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. Oppermann FS, Gnad F, Olsen JV, Hornberger R, Greff Z, Keri G, Mann M, Daub H: Large-scale proteomics analysis of the human kinome. Mol Cell Proteomics. 2009 Jul;8(7):1751-64. doi: 10.1074/mcp.M800588-MCP200. Epub 2009 Apr 15. [PubMed:19369195 ]
  3. Abbott GW, Sesti F, Splawski I, Buck ME, Lehmann MH, Timothy KW, Keating MT, Goldstein SA: MiRP1 forms IKr potassium channels with HERG and is associated with cardiac arrhythmia. Cell. 1999 Apr 16;97(2):175-87. [PubMed:10219239 ]
  4. Millat G, Chevalier P, Restier-Miron L, Da Costa A, Bouvagnet P, Kugener B, Fayol L, Gonzalez Armengod C, Oddou B, Chanavat V, Froidefond E, Perraudin R, Rousson R, Rodriguez-Lafrasse C: Spectrum of pathogenic mutations and associated polymorphisms in a cohort of 44 unrelated patients with long QT syndrome. Clin Genet. 2006 Sep;70(3):214-27. [PubMed:16922724 ]
  5. Abbott GW, Goldstein SA: Disease-associated mutations in KCNE potassium channel subunits (MiRPs) reveal promiscuous disruption of multiple currents and conservation of mechanism. FASEB J. 2002 Mar;16(3):390-400. [PubMed:11874988 ]
  6. Tinel N, Diochot S, Lauritzen I, Barhanin J, Lazdunski M, Borsotto M: M-type KCNQ2-KCNQ3 potassium channels are modulated by the KCNE2 subunit. FEBS Lett. 2000 Sep 1;480(2-3):137-41. [PubMed:11034315 ]
  7. Tinel N, Diochot S, Borsotto M, Lazdunski M, Barhanin J: KCNE2 confers background current characteristics to the cardiac KCNQ1 potassium channel. EMBO J. 2000 Dec 1;19(23):6326-30. [PubMed:11101505 ]
  8. Isbrandt D, Friederich P, Solth A, Haverkamp W, Ebneth A, Borggrefe M, Funke H, Sauter K, Breithardt G, Pongs O, Schulze-Bahr E: Identification and functional characterization of a novel KCNE2 (MiRP1) mutation that alters HERG channel kinetics. J Mol Med (Berl). 2002 Aug;80(8):524-32. Epub 2002 Jun 28. [PubMed:12185453 ]
  9. Yang Y, Xia M, Jin Q, Bendahhou S, Shi J, Chen Y, Liang B, Lin J, Liu Y, Liu B, Zhou Q, Zhang D, Wang R, Ma N, Su X, Niu K, Pei Y, Xu W, Chen Z, Wan H, Cui J, Barhanin J, Chen Y: Identification of a KCNE2 gain-of-function mutation in patients with familial atrial fibrillation. Am J Hum Genet. 2004 Nov;75(5):899-905. Epub 2004 Sep 13. [PubMed:15368194 ]