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Gene and Protein Information | |||||||
Species | TM | P Loops | AA | Chromosomal Location | Gene Symbol | Gene Name | Reference |
Human | 6 | 1 | 495 | 12p13.32 | KCNA1 | potassium voltage-gated channel subfamily A member 1 | 45 |
Mouse | 6 | 1 | 495 | 6 61.57 cM | Kcna1 | potassium voltage-gated channel, shaker-related subfamily, member 1 | 18,36 |
Rat | 6 | 1 | 495 | 4q42 | Kcna1 | potassium voltage-gated channel subfamily A member 1 |
Database Links | |
Alphafold | Q09470 (Hs), P16388 (Mm), P10499 (Rn) |
ChEMBL Target | CHEMBL2309 (Hs), CHEMBL2429705 (Mm), CHEMBL5190 (Rn) |
DrugBank Target | Q09470 (Hs) |
Ensembl Gene | ENSG00000111262 (Hs), ENSMUSG00000047976 (Mm), ENSRNOG00000064052 (Rn) |
Entrez Gene | 3736 (Hs), 16485 (Mm), 24520 (Rn) |
Human Protein Atlas | ENSG00000111262 (Hs) |
KEGG Gene | hsa:3736 (Hs), mmu:16485 (Mm), rno:24520 (Rn) |
OMIM | 176260 (Hs) |
Orphanet | ORPHA122756 (Hs) |
Pharos | Q09470 (Hs) |
RefSeq Nucleotide | NM_000217 (Hs), NM_010595 (Mm), NM_173095 (Rn) |
RefSeq Protein | NP_000208 (Hs), NP_034725 (Mm), NP_775118 (Rn) |
UniProtKB | Q09470 (Hs), P16388 (Mm), P10499 (Rn) |
Wikipedia | KCNA1 (Hs) |
Associated Proteins | ||||||||||||||||||||||||||||
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Associated Protein Comments | ||||||||||||||||||||||||||||
Other associated proteins are described in [5]. |
Functional Characteristics | |
KV |
Ion Selectivity and Conductance | ||||||
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Voltage Dependence | ||||||||||||||||
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Download all structure-activity data for this target as a CSV file
Channel Blockers | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Key to terms and symbols | View all chemical structures | Click column headers to sort | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Arrangement of Kv1 subunits in heteromeric channels dictates TEA pharmacology [2]. Dendrotoxin-k is a selective inhibitor of Kv1.1 containing channels. IC50 for α-dendrotoxin blockade differs between Kv1.1 expressed in Xenopus oocytes and mammalian cells [12]. |
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Phenotypes, Alleles and Disease Models | Mouse data from MGI | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Studies in mice have shown that a deletion/frameshift at I230* results in a non-functional protein leading to megencephaly and seizures [25-26]. |
Gene Expression and Pathophysiology | ||||||||||||
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Biologically Significant Variant Comments |
A total of 246 SNPs have been identified in human KCNA1. For more information see the entry on GeneCards. |
General Comments |
Kv1.1 can coassemble with other Kv1 family members in heteromultimers but not with members of other Kv families. Arrangement of Kv1 subunits in a tetramer dictates pharmacology. Unique in that it has an intronless coding region. Part of the mammalian Shaker-related family. Kv1.1 KO mice have spontaneous recurrent seizures and premature death in a strain-dependent manner. Mutations lead to episodic ataxia in humans, and megacephaly in mice. |
1. Adelman JP, Bond CT, Pessia M, Maylie J. (1995) Episodic ataxia results from voltage-dependent potassium channels with altered functions. Neuron, 15 (6): 1449-54. [PMID:8845167]
2. Al-Sabi A, Shamotienko O, Dhochartaigh SN, Muniyappa N, Le Berre M, Shaban H, Wang J, Sack JT, Dolly JO. (2010) Arrangement of Kv1 alpha subunits dictates sensitivity to tetraethylammonium. J Gen Physiol, 136 (3): 273-82. [PMID:20805574]
3. Bartok A, Toth A, Somodi S, Szanto TG, Hajdu P, Panyi G, Varga Z. (2014) Margatoxin is a non-selective inhibitor of human Kv1.3 K+ channels. Toxicon, 87: 6-16. [PMID:24878374]
4. Beckh S, Pongs O. (1990) Members of the RCK potassium channel family are differentially expressed in the rat nervous system. EMBO J, 9 (3): 777-82. [PMID:2311579]
5. Bildl W, Haupt A, Müller CS, Biniossek ML, Thumfart JO, Hüber B, Fakler B, Schulte U. (2012) Extending the dynamic range of label-free mass spectrometric quantification of affinity purifications. Mol Cell Proteomics, 11 (2): M111.007955. [PMID:22067099]
6. Browne DL, Gancher ST, Nutt JG, Brunt ER, Smith EA, Kramer P, Litt M. (1994) Episodic ataxia/myokymia syndrome is associated with point mutations in the human potassium channel gene, KCNA1. Nat Genet, 8 (2): 136-40. [PMID:7842011]
7. Chen H, von Hehn C, Kaczmarek LK, Ment LR, Pober BR, Hisama FM. (2007) Functional analysis of a novel potassium channel (KCNA1) mutation in hereditary myokymia. Neurogenetics, 8 (2): 131-5. [PMID:17136396]
8. Coleman SK, Newcombe J, Pryke J, Dolly JO. (1999) Subunit composition of Kv1 channels in human CNS. J Neurochem, 73 (2): 849-58. [PMID:10428084]
9. Eunson LH, Rea R, Zuberi SM, Youroukos S, Panayiotopoulos CP, Liguori R, Avoni P, McWilliam RC, Stephenson JB, Hanna MG et al.. (2000) Clinical, genetic, and expression studies of mutations in the potassium channel gene KCNA1 reveal new phenotypic variability. Ann Neurol, 48 (4): 647-56. [PMID:11026449]
10. Glaudemans B, van der Wijst J, Scola RH, Lorenzoni PJ, Heister A, van der Kemp AW, Knoers NV, Hoenderop JG, Bindels RJ. (2009) A missense mutation in the Kv1.1 voltage-gated potassium channel-encoding gene KCNA1 is linked to human autosomal dominant hypomagnesemia. J Clin Invest, 119 (4): 936-42. [PMID:19307729]
11. Grissmer S, Nguyen AN, Aiyar J, Hanson DC, Mather RJ, Gutman GA, Karmilowicz MJ, Auperin DD, Chandy KG. (1994) Pharmacological characterization of five cloned voltage-gated K+ channels, types Kv1.1, 1.2, 1.3, 1.5, and 3.1, stably expressed in mammalian cell lines. Mol Pharmacol, 45 (6): 1227-34. [PMID:7517498]
12. Harvey AL. (2001) Twenty years of dendrotoxins. Toxicon, 39 (1): 15-26. [PMID:10936620]
13. Herson PS, Virk M, Rustay NR, Bond CT, Crabbe JC, Adelman JP, Maylie J. (2003) A mouse model of episodic ataxia type-1. Nat Neurosci, 6 (4): 378-83. [PMID:12612586]
14. Hopkins WF, Allen ML, Houamed KM, Tempel BL. (1994) Properties of voltage-gated K+ currents expressed in Xenopus oocytes by mKv1.1, mKv1.2 and their heteromultimers as revealed by mutagenesis of the dendrotoxin-binding site in mKv1.1. Pflugers Arch, 428 (3-4): 382-90. [PMID:7816560]
15. Hurst RS, Busch AE, Kavanaugh MP, Osborne PB, North RA, Adelman JP. (1991) Identification of amino acid residues involved in dendrotoxin block of rat voltage-dependent potassium channels. Mol Pharmacol, 40 (4): 572-6. [PMID:1921987]
16. Höltje M, Brunk I, Grosse J, Beyer E, Veh RW, Bergmann M, Grosse G, Ahnert-Hilger G. (2007) Differential distribution of voltage-gated potassium channels Kv 1.1-Kv1.6 in the rat retina during development. J Neurosci Res, 85 (1): 19-33. [PMID:17075900]
17. Kim E, Niethammer M, Rothschild A, Jan YN, Sheng M. (1995) Clustering of Shaker-type K+ channels by interaction with a family of membrane-associated guanylate kinases. Nature, 378 (6552): 85-8. [PMID:7477295]
18. Klocke R, Roberds SL, Tamkun MM, Gronemeier M, Augustin A, Albrecht B, Pongs O, Jockusch H. (1993) Chromosomal mapping in the mouse of eight K(+)-channel genes representing the four Shaker-like subfamilies Shaker, Shab, Shaw, and Shal. Genomics, 18 (3): 568-74. [PMID:7905852]
19. Klumpp DJ, Farber DB, Bowes C, Song EJ, Pinto LH. (1991) The potassium channel MBK1 (Kv1.1) is expressed in the mouse retina. Cell Mol Neurobiol, 11 (6): 611-22. [PMID:1723658]
20. Koch RO, Wanner SG, Koschak A, Hanner M, Schwarzer C, Kaczorowski GJ, Slaughter RS, Garcia ML, Knaus HG. (1997) Complex subunit assembly of neuronal voltage-gated K+ channels. Basis for high-affinity toxin interactions and pharmacology. J Biol Chem, 272 (44): 27577-81. [PMID:9346893]
21. Koschak A, Bugianesi RM, Mitterdorfer J, Kaczorowski GJ, Garcia ML, Knaus HG. (1998) Subunit composition of brain voltage-gated potassium channels determined by hongotoxin-1, a novel peptide derived from Centruroides limbatus venom. J Biol Chem, 273 (5): 2639-44. [PMID:9446567]
22. Leoni AL, Marionneau C, Demolombe S, Le Bouter S, Mangoni ME, Escande D, Charpentier F. (2005) Chronic heart rate reduction remodels ion channel transcripts in the mouse sinoatrial node but not in the ventricle. Physiol Genomics, 24 (1): 4-12. [PMID:16219869]
23. Manganas LN, Akhtar S, Antonucci DE, Campomanes CR, Dolly JO, Trimmer JS. (2001) Episodic ataxia type-1 mutations in the Kv1.1 potassium channel display distinct folding and intracellular trafficking properties. J Biol Chem, 276 (52): 49427-34. [PMID:11679591]
24. Matsubara H, Liman ER, Hess P, Koren G. (1991) Pretranslational mechanisms determine the type of potassium channels expressed in the rat skeletal and cardiac muscles. J Biol Chem, 266 (20): 13324-8. [PMID:1712780]
25. Persson AS, Klement G, Almgren M, Sahlholm K, Nilsson J, Petersson S, Arhem P, Schalling M, Lavebratt C. (2005) A truncated Kv1.1 protein in the brain of the megencephaly mouse: expression and interaction. BMC Neurosci, 6: 65. [PMID:16305740]
26. Petersson S, Persson AS, Johansen JE, Ingvar M, Nilsson J, Klement G, Arhem P, Schalling M, Lavebratt C. (2003) Truncation of the Shaker-like voltage-gated potassium channel, Kv1.1, causes megencephaly. Eur J Neurosci, 18 (12): 3231-40. [PMID:14686897]
27. Ramaswami M, Gautam M, Kamb A, Rudy B, Tanouye MA, Mathew MK. (1990) Human potassium channel genes: Molecular cloning and functional expression. Mol Cell Neurosci, 1 (3): 214-23. [PMID:19912772]
28. Rettig J, Heinemann SH, Wunder F, Lorra C, Parcej DN, Dolly JO, Pongs O. (1994) Inactivation properties of voltage-gated K+ channels altered by presence of beta-subunit. Nature, 369 (6478): 289-94. [PMID:8183366]
29. Rhodes KJ, Strassle BW, Monaghan MM, Bekele-Arcuri Z, Matos MF, Trimmer JS. (1997) Association and colocalization of the Kvbeta1 and Kvbeta2 beta-subunits with Kv1 alpha-subunits in mammalian brain K+ channel complexes. J Neurosci, 17 (21): 8246-58. [PMID:9334400]
30. Roberds SL, Tamkun MM. (1991) Cloning and tissue-specific expression of five voltage-gated potassium channel cDNAs expressed in rat heart. Proc Natl Acad Sci USA, 88 (5): 1798-802. [PMID:1705709]
31. Robertson B, Owen D, Stow J, Butler C, Newland C. (1996) Novel effects of dendrotoxin homologues on subtypes of mammalian Kv1 potassium channels expressed in Xenopus oocytes. FEBS Lett, 383 (1-2): 26-30. [PMID:8612784]
32. Scheffer H, Brunt ER, Mol GJ, van der Vlies P, Stulp RP, Verlind E, Mantel G, Averyanov YN, Hofstra RM, Buys CH. (1998) Three novel KCNA1 mutations in episodic ataxia type I families. Hum Genet, 102 (4): 464-6. [PMID:9600245]
33. Schulte U, Thumfart JO, Klöcker N, Sailer CA, Bildl W, Biniossek M, Dehn D, Deller T, Eble S, Abbass K et al.. (2006) The epilepsy-linked Lgi1 protein assembles into presynaptic Kv1 channels and inhibits inactivation by Kvbeta1. Neuron, 49 (5): 697-706. [PMID:16504945]
34. Scott VE, Rettig J, Parcej DN, Keen JN, Findlay JB, Pongs O, Dolly JO. (1994) Primary structure of a beta subunit of alpha-dendrotoxin-sensitive K+ channels from bovine brain. Proc Natl Acad Sci USA, 91 (5): 1637-41. [PMID:8127858]
35. Smart SL, Lopantsev V, Zhang CL, Robbins CA, Wang H, Chiu SY, Schwartzkroin PA, Messing A, Tempel BL. (1998) Deletion of the K(V)1.1 potassium channel causes epilepsy in mice. Neuron, 20 (4): 809-19. [PMID:9581771]
36. Street VA, Robinson LC, Erford SK, Tempel BL. (1995) Molecular genetic analysis of distal mouse chromosome 6 defines gene order and positions of the deafwaddler and opisthotonos mutations. Genomics, 29 (1): 123-30. [PMID:8530061]
37. Stühmer W, Ruppersberg JP, Schröter KH, Sakmann B, Stocker M, Giese KP, Perschke A, Baumann A, Pongs O. (1989) Molecular basis of functional diversity of voltage-gated potassium channels in mammalian brain. EMBO J, 8 (11): 3235-44. [PMID:2555158]
38. Tempel BL, Jan YN, Jan LY. (1988) Cloning of a probable potassium channel gene from mouse brain. Nature, 332 (6167): 837-9. [PMID:2451788]
39. Tiffany AM, Manganas LN, Kim E, Hsueh YP, Sheng M, Trimmer JS. (2000) PSD-95 and SAP97 exhibit distinct mechanisms for regulating K(+) channel surface expression and clustering. J Cell Biol, 148 (1): 147-58. [PMID:10629225]
40. Tsaur ML, Sheng M, Lowenstein DH, Jan YN, Jan LY. (1992) Differential expression of K+ channel mRNAs in the rat brain and down-regulation in the hippocampus following seizures. Neuron, 8 (6): 1055-67. [PMID:1610565]
41. Vandendriessche T, Kopljar I, Jenkins DP, Diego-Garcia E, Abdel-Mottaleb Y, Vermassen E, Clynen E, Schoofs L, Wulff H, Snyders D et al.. (2012) Purification, molecular cloning and functional characterization of HelaTx1 (Heterometrus laoticus): the first member of a new κ-KTX subfamily. Biochem Pharmacol, 83 (9): 1307-17. [PMID:22305749]
42. Wang H, Kunkel DD, Martin TM, Schwartzkroin PA, Tempel BL. (1993) Heteromultimeric K+ channels in terminal and juxtaparanodal regions of neurons. Nature, 365 (6441): 75-9. [PMID:8361541]
43. Wang J, Weigand L, Wang W, Sylvester JT, Shimoda LA. (2005) Chronic hypoxia inhibits Kv channel gene expression in rat distal pulmonary artery. Am J Physiol Lung Cell Mol Physiol, 288 (6): L1049-58. [PMID:15665041]
44. Wenzel HJ, Vacher H, Clark E, Trimmer JS, Lee AL, Sapolsky RM, Tempel BL, Schwartzkroin PA. (2007) Structural consequences of Kcna1 gene deletion and transfer in the mouse hippocampus. Epilepsia, 48 (11): 2023-46. [PMID:17651419]
45. Wymore RS, Korenberg JR, Kinoshita KD, Aiyar J, Coyne C, Chen XN, Hustad CM, Copeland NG, Gutman GA, Jenkins NA et al.. (1994) Genomic organization, nucleotide sequence, biophysical properties, and localization of the voltage-gated K+ channel gene KCNA4/Kv1.4 to mouse chromosome 2/human 11p14 and mapping of KCNC1/Kv3.1 to mouse 7/human 11p14.3-p15.2 and KCNA1/Kv1.1 to human 12p13. Genomics, 20 (2): 191-202. [PMID:8020965]
46. Zerr P, Adelman JP, Maylie J. (1998) Episodic ataxia mutations in Kv1.1 alter potassium channel function by dominant negative effects or haploinsufficiency. J Neurosci, 18 (8): 2842-8. [PMID:9526001]
47. Zhang CL, Messing A, Chiu SY. (1999) Specific alteration of spontaneous GABAergic inhibition in cerebellar purkinje cells in mice lacking the potassium channel Kv1. 1. J Neurosci, 19 (8): 2852-64. [PMID:10191303]
48. Zhou L, Messing A, Chiu SY. (1999) Determinants of excitability at transition zones in Kv1.1-deficient myelinated nerves. J Neurosci, 19 (14): 5768-81. [PMID:10407018]
49. Zuberi SM, Eunson LH, Spauschus A, De Silva R, Tolmie J, Wood NW, McWilliam RC, Stephenson JB, Stephenson JP, Kullmann DM et al.. (1999) A novel mutation in the human voltage-gated potassium channel gene (Kv1.1) associates with episodic ataxia type 1 and sometimes with partial epilepsy. Brain, 122 ( Pt 5): 817-25. [PMID:10355668]