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UniProtKB/Swiss-Prot entry P22459


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name KCNA4_HUMAN
Primary accession number P22459
Secondary accession numbers None
Integrated into Swiss-Prot on August 1, 1991
Sequence was last modified on August 1, 1991 (Sequence version 1)
Annotations were last modified on    July 22, 2008 (Entry version 81)
Name and origin of the protein
Protein name Potassium voltage-gated channel subfamily A member 4
Synonyms Voltage-gated potassium channel subunit Kv1.4
HK1
HPCN2
HBK4
HUKII
Gene name
Name: KCNA4
Synonyms: KCNA4L
From
Homo sapiens (Human) [TaxID: 9606] 
Taxonomy Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
Protein existence 1: Evidence at protein level;
References
[1]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Skeletal muscle;
PubMed=1986382 [NCBI, ExPASy, EBI, Israel, Japan]
Philipson L.H., Hice R.E., Schaefer K., Lamendola J., Bell G.I., Nelson D.J., Steiner D.F.;
"Sequence and functional expression in Xenopus oocytes of a human insulinoma and islet potassium channel.";
Proc. Natl. Acad. Sci. U.S.A. 88:53-57(1991).
[2]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Skeletal muscle;
DOI=10.1093/nar/18.23.7160; PubMed=2263489 [NCBI, ExPASy, EBI, Israel, Japan]
Philipson L.H., Schaefer K., Lamendola J., Bell G.I., Steiner D.F.;
"Sequence of a human fetal skeletal muscle potassium channel cDNA related to RCK4.";
Nucleic Acids Res. 18:7160-7160(1990).
[3]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Heart;
PubMed=2001794 [NCBI, ExPASy, EBI, Israel, Japan]
Tamkun M.M., Knoth K.M., Walbridge J.A., Kroemer H., Roden D.M., Glover D.M.;
"Molecular cloning and characterization of two voltage-gated K+ channel cDNAs from human ventricle.";
FASEB J. 5:331-337(1991).
[4]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Brain;
Ramaswami M., Gautam M., Kamb A., Rudy B., Tanouye M.A., Mathew M.K.;
"Human potassium channel genes: molecular cloning and functional expression.";
Mol. Cell. Neurosci. 1:214-223(1990).
Comments
  • FUNCTION: Mediates 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.
  • SUBUNIT: Heterotetramer of potassium channel proteins. Binds PDZ domains of DLG1, DLG2 and DLG4. Interacts with OPRS1 (By similarity).
  • INTERACTION:
    P31016:Dlg4 (xeno); NbExp=1; IntAct=EBI-631235, EBI-375655;
  • SUBCELLULAR LOCATION: Membrane; Multi-pass membrane protein.
  • DOMAIN: The N-terminus may be important in determining the rate of inactivation of the channel while the tail may play a role in modulation of channel activity and/or targeting of the channel to specific subcellular compartments.
  • DOMAIN: The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position.
  • SIMILARITY: Belongs to the potassium channel family. A (Shaker) subfamily.
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
EMBL
M55514; AAA60034.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M60450; AAA61275.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
L02751; AAA36140.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
PIR A39922; A39922.
RefSeq NP_002224.1; -.
UniGene Hs.592002
3D structure databases
PDB
1ZTO; NMR; -; A=1-37.[ExPASy / RCSB / EBI]
PDBsum 1ZTO; -.
SMR P22459; 1-75, 175-274, 369-571.
ModBase P22459.
Protein-protein interaction databases
IntAct P22459; -.
PTM databases
PhosphoSite P22459; -.
Organism-specific databases
H-InvDB HIX0036152; -.
HGNC HGNC:6222; KCNA4.
GenAtlas KCNA4.
HPA CAB001977; -.
MIM 176266; gene. [NCBI / EBI]
PharmGKB PA207; -.
GeneCards P22459.
Gene expression databases
ArrayExpress P22459; -.
CleanEx HS_KCNA4; -.
GermOnline ENSG00000182255; Homo sapiens.
Ontologies
GO
GO:0008076; Cellular component: voltage-gated potassium channel complex (traceable author statement from ProtInc).
GO:0005515; Molecular function: protein binding (inferred from physical interaction from IntAct).
GO:0005249; Molecular function: voltage-gated potassium channel activity (traceable author statement from ProtInc).
GO:0006813; Biological process: potassium ion transport (traceable author statement from ProtInc).
QuickGo view.
Family and domain databases
InterPro IPR000210; BTB/POZ-like.
IPR011333; BTB/POZ_fold.
IPR005821; Ion_trans.
IPR003091; K_chnl.
IPR003968; K_chnl_volt-dep_Kv.
IPR003972; K_chnl_volt-dep_Kv1.
IPR004051; K_chnl_volt-dep_Kv1.4.
IPR012897; K_chnl_volt-dep_Kv1.4_TID.
IPR003131; K_chnl_volt-dep_Kv_tetra.
Graphical view of domain structure.
Gene3D G3DSA:3.30.710.10; BTB/POZ_fold; 1.
G3DSA:1.20.5.600; K_channel_TID; 1.
Pfam PF00520; Ion_trans; 1.
PF07941; K_channel_TID; 1.
PF02214; K_tetra; 1.
Pfam graphical view of domain structure.
PRINTS PR00169; KCHANNEL.
PR01511; KV14CHANNEL.
PR01491; KVCHANNEL.
PR01496; SHAKERCHANEL.
SMART SM00225; BTB; 1.
SMART graphical view of domain structure.
BLOCKS P22459.
Genome annotation databases
Ensembl ENSG00000182255; Homo sapiens. [Contig view]
GeneID 3739; -.
KEGG hsa:3739; -.
Phylogenomic databases
HOGENOM P22459; -.
HOVERGEN P22459; -.
Other
SOURCE KCNA4; Homo sapiens.
ProtoNet P22459.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
3D-structure; Glycoprotein; Ion transport; Ionic channel; Membrane; Phosphoprotein; Potassium; Potassium channel; Potassium transport; Transmembrane; Transport; Voltage-gated channel.
Features
SEVIEWER logo Feature table viewer FT aligner logo Feature aligner
KeyFrom   To Length Description FTId
CHAIN   1   653  653     Potassium voltage-gated channel subfamily A member 4. PRO_0000053981
TRANSMEM   308   326  19     Segment S1 (Potential). 
TRANSMEM   371   392  22     Segment S2 (Potential). 
TRANSMEM   404   424  21     Segment S3 (Potential). 
TRANSMEM   443   461  19     Segment S4 (Potential). 
TRANSMEM   478   497  20     Segment S5 (Potential). 
TRANSMEM   539   561  23     Segment S6 (Potential). 
MOTIF   524   529  6     Selectivity filter (By similarity). 
MOTIF   651   653  3     PDZ-binding (By similarity). 
COMPBIAS   62    65  4     Poly-His. 
COMPBIAS   123   137  15     Poly-Glu. 
COMPBIAS   162   165  4     Poly-Gly. 
COMPBIAS   433   436  4     Poly-Gln. 
MOD_RES   90    90        Phosphoserine; by PKA (Potential). 
MOD_RES   122   122        Phosphoserine (By similarity). 
MOD_RES   599   599        Phosphoserine; by PKA (Potential). 
CARBOHYD   181   181        N-linked (GlcNAc...) (Potential). 
CARBOHYD   352   352        N-linked (GlcNAc...) (Potential). 
CONFLICT   38    38        R -> A (in Ref. 3 and 4). 
CONFLICT   42    42        R -> A (in Ref. 3 and 4). 
CONFLICT   84    88        EEEAT -> RRRRQ (in Ref. 3 and 4). 
CONFLICT   304   304        D -> S (in Ref. 3 and 4). 
CONFLICT   542   542        V -> S (in Ref. 3 and 4). 
CONFLICT   631   631        A -> G (in Ref. 3 and 4). 
STRAND   11    13  3      
HELIX   21    23  3      
HELIX   25    33  9      
Sequence information
Length: 653 AA [This is the length of the unprocessed precursor] Molecular weight: 73288 Da [This is the MW of the unprocessed precursor] CRC64: 7A66781F827D6F27 [This is a checksum on the sequence]
        10         20         30         40         50         60 
MEVAMVSAES SGCNSHMPYG YAAQARARER ERLAHSRRAA ARAVAAATAA VEGSGGSGGG 

        70         80         90        100        110        120 
SHHHHQSRGA CTSHDPQSSR GSREEEATRS EKKKAHYRQS SFPHCSDLMP SGSEEKILRE 

       130        140        150        160        170        180 
LSEEEEDEEE EEEEEEEGRF YYSEDDHGDE CSYTDLLPQD EGGGGYSSVR YSDCCERVVI 

       190        200        210        220        230        240 
NVSGLRFETQ MKTLAQFPET LLGDPEKRTQ YFDPLRNEYF FDRNRPSFDA ILYYYQSGGR 

       250        260        270        280        290        300 
LKRPVNVPFD IFTEEVKFYQ LGEEALLKFR EDEGFVREEE DRALPENEFK KQIWLLFEYP 

       310        320        330        340        350        360 
ESSDPARGIA IVSVLVILIS IVIFCLETLP EFRDDRDLVM ALSAGGHGGL LNDTSAPHLE 

       370        380        390        400        410        420 
NSGHTIFNDP FFIVETVCIV WFSFEFVVRC FACPSQALFF KNIMNIIDIV SILPYFITLG 

       430        440        450        460        470        480 
TDLAQQQGGG NGQQQQAMSF AILRIIRLVR VFRIFKLSRH SKGLQILGHT LRASMRELGL 

       490        500        510        520        530        540 
LIFFLFIGVI LFSSAVYFAE ADEPTTHFQS IPDAFWWAVV TMTTVGYGDM KPITVGGKIV 

       550        560        570        580        590        600 
GVLCAIAGVL TIALPVPVIV SNFNYFYHRE TENEEQTQLT QNAVSCPYLP SNLLKKFRSS 

       610        620        630        640        650 
TSSSLGDKSE YLEMEEGVKE SLCAKEEKCQ AKGDDSETDK NNCSNAKAVE TDV 

P22459 in FASTA format

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