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Entry version 146 (08 May 2019)
Sequence version 2 (27 Jul 2011)
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Protein

Potassium voltage-gated channel subfamily C member 3

Gene

Kcnc3

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Voltage-gated potassium channel that plays an important role in the rapid repolarization of fast-firing brain neurons. The channel opens in response to the voltage difference across the membrane, forming a potassium-selective channel through which potassium ions pass in accordance with their electrochemical gradient. The channel displays rapid activation and inactivation kinetics (PubMed:18539595, PubMed:26997484, PubMed:24218544). It plays a role in the regulation of the frequency, shape and duration of action potentials in Purkinje cells (PubMed:15217387, PubMed:18448641, PubMed:24218544). Required for normal survival of cerebellar neurons, probably via its role in regulating the duration and frequency of action potentials that in turn regulate the activity of voltage-gated Ca2+ channels and cellular Ca2+ homeostasis (PubMed:24218544). Required for normal motor function (PubMed:16923152, PubMed:18448641). Plays a role in the reorganization of the cortical actin cytoskeleton and the formation of actin veil structures in neuronal growth cones via its interaction with HAX1 and the Arp2/3 complex (PubMed:26997484).6 Publications

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionIon channel, Potassium channel, Voltage-gated channel
Biological processIon transport, Potassium transport, Transport
LigandPotassium

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-1296072 Voltage gated Potassium channels

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Potassium voltage-gated channel subfamily C member 3
Alternative name(s):
KSHIIID
Voltage-gated potassium channel subunit Kv3.3
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:Kcnc3
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiMus musculus (Mouse)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri10090 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000589 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Unplaced

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:96669 Kcnc3

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini1 – 290CytoplasmicCuratedAdd BLAST290
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei291 – 309Helical; Name=Segment S1Sequence analysisAdd BLAST19
Transmembranei351 – 370Helical; Name=Segment S2Sequence analysisAdd BLAST20
Topological domaini371 – 379CytoplasmicSequence analysis9
Transmembranei380 – 398Helical; Name=Segment S3Sequence analysisAdd BLAST19
Transmembranei412 – 434Helical; Voltage-sensor; Name=Segment S4Sequence analysisAdd BLAST23
Topological domaini435 – 447CytoplasmicSequence analysisAdd BLAST13
Transmembranei448 – 469Helical; Name=Segment S5Sequence analysisAdd BLAST22
Transmembranei518 – 539Helical; Name=Segment S6Sequence analysisAdd BLAST22
Topological domaini540 – 769CytoplasmicSequence analysisAdd BLAST230

Keywords - Cellular componenti

Cell junction, Cell membrane, Cell projection, Cytoplasm, Cytoskeleton, Membrane, Synapse

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the ‘Pathology and Biotech’ section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Mice lacking both Kcnc3 and Kcnc1 are born at the expected Mendelian rate, but the pups do not thrive and all die about 26 days after birth when kept together with other littermates. Their failure to thrive may be due to motor problems; mutant pups survive when fed separately, but 45 days after birth their body weight is only 50 to 60 % of that of wild-type (PubMed:11517255). They appear uncoordinated and display severe ataxia, myoclonus and spontaneous whole-body muscle jerks, but display no obvious alterations in brain morphology (PubMed:11517255, PubMed:15217387, PubMed:16923152). Mice lacking only Kcnc3 still display ataxic gait and decreased motor skill, but to a lesser degree than mice lacking both Kcnc3 and Kcnc1 (PubMed:16923152, PubMed:18448641). Purkinje cell-specific expression of Kcnc3 restores normal motor skills (PubMed:18448641). Mutant mice are also much more sensitive to ethanol and fall sideways at ethanol concentrations that have no effect on wild-type mice (PubMed:11517255). They display increased locomotor and exploratory activity (PubMed:11517255, PubMed:15217387). Mice lacking Kcnc3 or both Kcnc3 and Kcnc1 are resistant to the tremorogenic agent harmaline (PubMed:15217387).4 Publications

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology_and_biotech_section">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi423R → H: Loss of channel activity. Functions as dominant negative mutation that impairs function of wild-type channel subunits. Causes impaired Purkinje cell dendrite growth and premature death of cerebellar Purkinje cells. 1 Publication1
Mutagenesisi592G → R: No effect on voltage-dependent channel opening or current amplitude, but decreased rate of inactivation during prolonged depolarization. 1 Publication1

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00000540561 – 769Potassium voltage-gated channel subfamily C member 3Add BLAST769

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi320N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi336N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi483N-linked (GlcNAc...) asparagineSequence analysis1
<p>This subsection of the ‘PTM / Processing’ section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei625Omega-N-methylarginineCombined sources1
Modified residuei687PhosphoserineCombined sources1
Modified residuei692PhosphoserineCombined sources1
Modified residuei731PhosphoserineCombined sources1
Modified residuei734PhosphoserineCombined sources1
Modified residuei742PhosphoserineCombined sources1
Modified residuei750PhosphothreonineCombined sources1
Modified residuei754PhosphoserineCombined sources1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

N-glycosylated.By similarity

Keywords - PTMi

Glycoprotein, Methylation, Phosphoprotein

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q63959

PeptideAtlas

More...
PeptideAtlasi
Q63959

PRoteomics IDEntifications database

More...
PRIDEi
Q63959

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
Q63959

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...
PhosphoSitePlusi
Q63959

SwissPalm database of S-palmitoylation events

More...
SwissPalmi
Q63959

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the ‘Expression’ section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified ‘at protein level’. <br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Detected on Purkinje cells in the dentate, interposed and medial nucleus in cerebellum (PubMed:15217387, PubMed:18448641). Detected in brainstem (PubMed:18539595). Detected at calyces of Held in the auditory brain stem (at protein level) (PubMed:26997484). Isoform KV3.3B is highly enriched in the brain, particularly in the cerebellum, where its expression is confined to Purkinje cells and deep cerebellar nuclei. Isoform KV3.3A is not expressed in cerebellum.5 Publications

<p>This subsection of the ‘Expression’ section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified ‘at the protein level’.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Isoform KV3.3B: Expression begins in cerebellar Purkinje cells between postnatal day 8 (P8) and P10 and continues through adulthood.1 Publication

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homotetramer. Heterotetramer with KCNC1 (By similarity).

Interacts (via C-terminus) with HAX1.

Identified in a complex with ACTR3, a subunit of the Arp2/3 complex; this interaction is indirect and depends on the presence of HAX1. Interaction with HAX1 modulates channel gating (PubMed:26997484).

By similarity1 Publication

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000103539

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

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SMRi
Q63959

Database of comparative protein structure models

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ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni1 – 79Important for normal N-type inactivation1 PublicationAdd BLAST79

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi503 – 508Selectivity filterBy similarity6

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi41 – 44Poly-Gln4
Compositional biasi82 – 86Poly-Gly5
Compositional biasi229 – 234Poly-Gly6
Compositional biasi577 – 587Poly-ProAdd BLAST11
Compositional biasi596 – 599Poly-Pro4
Compositional biasi669 – 674Poly-Ala6

<p>This subsection of the ‘Family and domains’ section provides general information on the biological role of a domain. The term ‘domain’ is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position.Curated
The cytoplasmic N-terminus mediates N-type inactivation.1 Publication
The C-terminal cytoplasmic tail contributes to the regulation of channel inactivation and to the interaction with HAX1 and the Arp2/3 complex.1 Publication

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG3713 Eukaryota
COG1226 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000231012

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q63959

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.120.350, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000210 BTB/POZ_dom
IPR005821 Ion_trans_dom
IPR003968 K_chnl_volt-dep_Kv
IPR003974 K_chnl_volt-dep_Kv3
IPR005404 K_chnl_volt-dep_Kv3.3
IPR021105 K_chnl_volt-dep_Kv3_ID
IPR011333 SKP1/BTB/POZ_sf
IPR003131 T1-type_BTB
IPR028325 VG_K_chnl
IPR027359 Volt_channel_dom_sf

The PANTHER Classification System

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PANTHERi
PTHR11537 PTHR11537, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF02214 BTB_2, 1 hit
PF00520 Ion_trans, 1 hit
PF11404 Potassium_chann, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01582 KV33CHANNEL
PR01491 KVCHANNEL
PR01498 SHAWCHANNEL

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00225 BTB, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF54695 SSF54695, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequences (2+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry describes 2 <p>This subsection of the ‘Sequence’ section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket

This entry has 2 described isoforms and 6 potential isoforms that are computationally mapped.Show allAlign All

Isoform KV3.3B (identifier: Q63959-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MLSSVCVWSF RGRQGTGKQQ PQPVPTPQPP ESSPPPLPPP QQQQCSQPGT
60 70 80 90 100
AASPAVPAFL RPGGRRAEPC PGLPAVAMGR HGGGGGDSGK IVINVGGVRH
110 120 130 140 150
ETYRSTLRTL PGTRLAGLTE PEAAARFDYD PGTDEFFFDR HPGVFAYVLN
160 170 180 190 200
YYRTGKLHCP ADVCGPLFEE ELGFWGIDET DVEACCWMTY RQHRDAEEAL
210 220 230 240 250
DSFEAPDSSA NANANAGGAH DAGLDDEAGA GGGGLDGAGG ELKRLCFQDA
260 270 280 290 300
GGGAGGPAGG AGGAGGTWWR RWQPRVWALF EDPYSSRAAR YVAFASLFFI
310 320 330 340 350
LISITTFCLE THEGFIHISN KTVTQASPIP GAPPENITNV EVETEPFLTY
360 370 380 390 400
VEGVCVVWFT FEFLMRVTFC PDKVEFLKSS LNIIDCVAIL PFYLEVGLSG
410 420 430 440 450
LSSKAAKDVL GFLRVVRFVR ILRIFKLTRH FVGLRVLGHT LRASTNEFLL
460 470 480 490 500
LIIFLALGVL IFATMIYYAE RIGADPDDIL GSNHTYFKNI PIGFWWAVVT
510 520 530 540 550
MTTLGYGDMY PKTWSGMLVG ALCALAGVLT IAMPVPVIVN NFGMYYSLAM
560 570 580 590 600
AKQKLPKKKN KHIPRPPQPG SPNYCKPDPP PPPPPHPHHG SGGISPPPPI
610 620 630 640 650
TPPSMGVNVA GAYPPGPHTH PGLLRGGAGG LGIMGLPPLP APGEPCPLAQ
660 670 680 690 700
EEVIETNRAV DPRPNGDPAA AALAHEDCPA IDQPAMSPED KSPITPGSRG
710 720 730 740 750
RYSRDRACFL VTDYAPSPDG SIRKGYEKSR SLSSIVGLSG VSLRLAPLAT
760
PPGSPRATRR APPTLPSIL
Length:769
Mass (Da):82,143
Last modified:July 27, 2011 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iC910236DE8AF04C9
GO
Isoform KV3.3A (identifier: Q63959-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     660-769: VDPRPNGDPA...RAPPTLPSIL → GEAGARTGGV...FGERDSETQV

Show »
Length:757
Mass (Da):81,190
Checksum:iE948AE4B942F23F6
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 6 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
D3YZV2D3YZV2_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
769Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
E9QKI2E9QKI2_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
770Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
A0A140LIW8A0A140LIW8_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
729Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
A0A140LHI4A0A140LHI4_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
730Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
A0A140LHT3A0A140LHT3_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
768Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
A0A140LHN2A0A140LHN2_MOUSE
Potassium voltage-gated channel sub...
Kcnc3
157Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Sequence’ section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti13R → C in AAC60679 (PubMed:8301351).Curated1
Sequence conflicti51 – 52AA → GP in AAC60679 (PubMed:8301351).Curated2
Sequence conflicti55A → G in AAC60679 (PubMed:8301351).Curated1
Sequence conflicti256G → D in CAA43209 (PubMed:1740329).Curated1
Sequence conflicti257 – 258PA → LP in AAC60679 (PubMed:8301351).Curated2
Sequence conflicti260 – 266GAGGAGG → ARAAGA in CAA43209 (PubMed:1740329).Curated7
Sequence conflicti521A → G in AAC60679 (PubMed:8301351).Curated1
Sequence conflicti521A → G in CAA43209 (PubMed:1740329).Curated1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Sequence’ section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_001021660 – 769VDPRP…LPSIL → GEAGARTGGVGRSGGKVAGL EGMQGQGFLGSGRVGWEATA DRKDKWLEGWTPGTKSHRNR IPRTRACEHGFQPGCSQRPL VRSSRVRIFGERDSETQV in isoform KV3.3A. CuratedAdd BLAST110

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

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DDBJi
Links Updated
S69381 mRNA Translation: AAC60679.1
AC157653 Genomic DNA No translation available.
X60796, X60797 Genomic DNA Translation: CAA43209.1

Protein sequence database of the Protein Information Resource

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PIRi
A42073

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
S69381 mRNA Translation: AAC60679.1
AC157653 Genomic DNA No translation available.
X60796, X60797 Genomic DNA Translation: CAA43209.1
PIRiA42073

3D structure databases

SMRiQ63959
ModBaseiSearch...

Protein-protein interaction databases

STRINGi10090.ENSMUSP00000103539

PTM databases

iPTMnetiQ63959
PhosphoSitePlusiQ63959
SwissPalmiQ63959

Proteomic databases

PaxDbiQ63959
PeptideAtlasiQ63959
PRIDEiQ63959

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Organism-specific databases

MGIiMGI:96669 Kcnc3

Phylogenomic databases

eggNOGiKOG3713 Eukaryota
COG1226 LUCA
HOGENOMiHOG000231012
InParanoidiQ63959

Enzyme and pathway databases

ReactomeiR-MMU-1296072 Voltage gated Potassium channels

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q63959

The Stanford Online Universal Resource for Clones and ESTs

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SOURCEi
Search...

Family and domain databases

Gene3Di1.20.120.350, 1 hit
InterProiView protein in InterPro
IPR000210 BTB/POZ_dom
IPR005821 Ion_trans_dom
IPR003968 K_chnl_volt-dep_Kv
IPR003974 K_chnl_volt-dep_Kv3
IPR005404 K_chnl_volt-dep_Kv3.3
IPR021105 K_chnl_volt-dep_Kv3_ID
IPR011333 SKP1/BTB/POZ_sf
IPR003131 T1-type_BTB
IPR028325 VG_K_chnl
IPR027359 Volt_channel_dom_sf
PANTHERiPTHR11537 PTHR11537, 1 hit
PfamiView protein in Pfam
PF02214 BTB_2, 1 hit
PF00520 Ion_trans, 1 hit
PF11404 Potassium_chann, 1 hit
PRINTSiPR01582 KV33CHANNEL
PR01491 KVCHANNEL
PR01498 SHAWCHANNEL
SMARTiView protein in SMART
SM00225 BTB, 1 hit
SUPFAMiSSF54695 SSF54695, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

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ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

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MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiKCNC3_MOUSE
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q63959
Secondary accession number(s): E9Q5E5, Q62088
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1998
Last sequence update: July 27, 2011
Last modified: May 8, 2019
This is version 146 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
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