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NamePotassium voltage-gated channel subfamily A member 3
Synonyms
  • HGK5
  • HLK3
  • HPCN3
  • Voltage-gated K(+) channel HuKIII
  • Voltage-gated potassium channel subunit Kv1.3
Gene NameKCNA3
OrganismHuman
Amino acid sequence
>lcl|BSEQ0008567|Potassium voltage-gated channel subfamily A member 3
MDERLSLLRSPPPPSARHRAHPPQRPASSGGAHTLVNHGYAEPAAGRELPPDMTVVPGDH
LLEPEVADGGGAPPQGGCGGGGCDRYEPLPPSLPAAGEQDCCGERVVINISGLRFETQLK
TLCQFPETLLGDPKRRMRYFDPLRNEYFFDRNRPSFDAILYYYQSGGRIRRPVNVPIDIF
SEEIRFYQLGEEAMEKFREDEGFLREEERPLPRRDFQRQVWLLFEYPESSGPARGIAIVS
VLVILISIVIFCLETLPEFRDEKDYPASTSQDSFEAAGNSTSGSRAGASSFSDPFFVVET
LCIIWFSFELLVRFFACPSKATFSRNIMNLIDIVAIIPYFITLGTELAERQGNGQQAMSL
AILRVIRLVRVFRIFKLSRHSKGLQILGQTLKASMRELGLLIFFLFIGVILFSSAVYFAE
ADDPTSGFSSIPDAFWWAVVTMTTVGYGDMHPVTIGGKIVGSLCAIAGVLTIALPVPVIV
SNFNYFYHRETEGEEQSQYMHVGSCQHLSSSAEELRKARSNSTLSKSEYMVIEEGGMNHS
AFPQTPFKTGNSTATCTTNNNPNSCVNIKKIFTDV
Number of residues575
Molecular Weight63841.09
Theoretical pINot Available
GO Classification
Functions
  • voltage-gated ion channel activity
  • delayed rectifier potassium channel activity
Processes
  • potassium ion transport
  • synaptic transmission
  • potassium ion transmembrane transport
  • protein homooligomerization
Components
  • plasma membrane
  • voltage-gated potassium channel complex
  • integral component of membrane
  • axon
General FunctionVoltage-gated ion channel activity
Specific FunctionMediates the voltage-dependent potassium ion permeability of excitable membranes. Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a potassium-selective channel through which potassium ions may pass in accordance with their electrochemical gradient.
Pfam Domain Function
Transmembrane Regions235-253 295-316 328-348 363-381 398-417 459-481
GenBank Protein IDNot Available
UniProtKB IDP22001
UniProtKB Entry NameKCNA3_HUMAN
Cellular LocationCell membrane
Gene sequence
>lcl|BSEQ0013277|Potassium voltage-gated channel subfamily A member 3 (KCNA3)
ATGGACGAGCGCCTCAGCCTTCTGCGCTCGCCGCCGCCGCCCTCAGCCCGCCACCGCGCC
CACCCTCCTCAGCGCCCAGCGAGCAGCGGCGGTGCCCACACGCTGGTGAACCACGGCTAC
GCGGAGCCCGCCGCAGGCCGCGAGCTGCCGCCCGACATGACCGTGGTGCCCGGGGACCAC
CTGCTGGAGCCGGAGGTGGCCGATGGTGGAGGGGCCCCGCCTCAAGGCGGCTGTGGCGGC
GGCGGCTGCGACCGCTACGAGCCGCTGCCGCCCTCACTGCCGGCCGCGGGCGAGCAGGAC
TGCTGCGGGGAGCGCGTGGTCATCAACATCTCCGGGCTGCGCTTCGAGACGCAGCTGAAG
ACCCTTTGCCAGTTCCCCGAGACGCTGCTGGGCGACCCCAAGCGGCGCATGAGGTACTTC
GACCCGCTCCGCAACGAGTACTTCTTCGACCGCAACCGGCCCAGCTTCGACGCCATCCTC
TACTACTATCAGTCCGGGGGCCGCATCCGCCGGCCGGTCAACGTGCCCATCGACATTTTC
TCCGAGGAGATCCGCTTCTACCAGCTGGGCGAGGAGGCCATGGAGAAGTTCCGCGAGGAC
GAGGGCTTCCTGCGGGAGGAGGAGCGGCCCTTGCCCCGCCGCGACTTCCAGCGCCAGGTG
TGGCTGCTCTTCGAGTACCCCGAGAGCTCCGGGCCGGCCCGGGGCATCGCCATCGTGTCC
GTGCTGGTCATCCTCATCTCCATTGTCATCTTCTGCCTGGAGACGCTGCCGGAGTTCCGC
GACGAGAAGGACTACCCCGCCTCGACGTCGCAGGACTCATTCGAAGCAGCCGGCAACAGC
ACGTCGGGGTCCCGCGCAGGAGCCTCCAGCTTCTCCGATCCCTTCTTCGTGGTGGAGACG
CTGTGCATCATCTGGTTCTCCTTCGAACTGCTGGTGCGGTTCTTCGCTTGTCCTAGCAAA
GCCACCTTCTCGCGAAACATCATGAACCTGATCGACATTGTGGCCATCATTCCTTATTTT
ATCACTCTGGGTACCGAGCTGGCCGAACGACAGGGCAATGGACAGCAGGCCATGTCTCTG
GCCATCCTGAGGGTCATCCGCCTGGTAAGGGTCTTCCGCATCTTCAAGCTGTCGCGCCAC
TCCAAGGGGCTGCAGATCCTCGGGCAAACGCTGAAGGCGTCCATGCGGGAGCTGGGATTG
CTCATCTTCTTCCTCTTTATTGGGGTCATCCTTTTCTCCAGCGCGGTCTACTTTGCCGAG
GCAGACGACCCCACTTCAGGTTTCAGCAGCATCCCGGATGCCTTCTGGTGGGCAGTGGTA
ACCATGACAACAGTGGGTTACGGCGATATGCACCCAGTGACCATAGGGGGCAAGATTGTG
GGATCTCTCTGTGCCATCGCCGGTGTCTTGACCATCGCATTGCCAGTTCCCGTGATTGTT
TCCAACTTCAATTACTTCTACCACCGGGAGACAGAAGGGGAAGAGCAATCCCAGTACATG
CACGTGGGAAGTTGCCAGCACCTCTCCTCTTCAGCCGAGGAGCTCCGAAAAGCAAGGAGT
AACTCGACTCTGAGTAAGTCGGAGTATATGGTGATCGAAGAGGGGGGTATGAACCATAGC
GCTTTCCCCCAGACCCCTTTCAAAACGGGCAATTCCACTGCCACCTGCACCACGAACAAT
AATCCCAACTCTTGTGTCAACATCAAAAAGATATTCACCGATGTTTAA
GenBank Gene IDNot Available
GeneCard IDNot Available
GenAtlas IDNot Available
HGNC IDHGNC:6221
Chromosome Location1
LocusNot Available
References
  1. Folander K, Douglass J, Swanson R: Confirmation of the assignment of the gene encoding Kv1.3, a voltage-gated potassium channel (KCNA3) to the proximal short arm of human chromosome 1. Genomics. 1994 Sep 1;23(1):295-6. 7829094
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  4. Philipson LH, Hice RE, Schaefer K, LaMendola J, Bell GI, Nelson DJ, Steiner DF: Sequence and functional expression in Xenopus oocytes of a human insulinoma and islet potassium channel. Proc Natl Acad Sci U S A. 1991 Jan 1;88(1):53-7. 1986382
  5. Attali B, Romey G, Honore E, Schmid-Alliana A, Mattei MG, Lesage F, Ricard P, Barhanin J, Lazdunski M: Cloning, functional expression, and regulation of two K+ channels in human T lymphocytes. J Biol Chem. 1992 Apr 25;267(12):8650-7. 1373731
  6. Cai YC, Osborne PB, North RA, Dooley DC, Douglass J: Characterization and functional expression of genomic DNA encoding the human lymphocyte type n potassium channel. DNA Cell Biol. 1992 Mar;11(2):163-72. 1547020