UniProtKB - Q01956 (KCNC3_RAT)
Potassium voltage-gated channel subfamily C member 3
Kcnc3
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:1381835).
It plays a role in the regulation of the frequency, shape and duration of action potentials in Purkinje cells. 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. Required for normal motor function (By similarity).
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 (By similarity).
By similarity1 PublicationGO - Molecular functioni
- delayed rectifier potassium channel activity Source: GO_Central
- voltage-gated potassium channel activity Source: UniProtKB
GO - Biological processi
- potassium ion transmembrane transport Source: UniProtKB
- protein homooligomerization Source: InterPro
- protein tetramerization Source: UniProtKB
- regulation of ion transmembrane transport Source: UniProtKB-KW
- regulation of neurotransmitter secretion Source: RGD
Keywordsi
Molecular function | Ion channel, Potassium channel, Voltage-gated channel |
Biological process | Ion transport, Potassium transport, Transport |
Ligand | Potassium |
Enzyme and pathway databases
Reactomei | R-RNO-1296072, Voltage gated Potassium channels |
Names & Taxonomyi
Protein namesi | Recommended name: Potassium voltage-gated channel subfamily C member 3Alternative name(s): KSHIIID1 Publication Voltage-gated potassium channel subunit Kv3.31 Publication |
Gene namesi | Name:Kcnc3 |
Organismi | Rattus norvegicus (Rat) |
Taxonomic identifieri | 10116 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Myomorpha › Muroidea › Muridae › Murinae › Rattus |
Proteomesi |
|
Organism-specific databases
RGDi | 621358, Kcnc3 |
Subcellular locationi
Plasma membrane
- Cell membrane 1 Publication; Multi-pass membrane protein Sequence analysis
- presynaptic cell membrane 1 Publication; Multi-pass membrane protein Sequence analysis
- dendritic spine membrane 1 Publication; Multi-pass membrane protein Sequence analysis
Cytoskeleton
- cytoskeleton By similarity
Other locations
- Perikaryon By similarity
- axon By similarity
- dendrite By similarity
- cell cortex By similarity
Note: Detected on Purkinje cell dendritic spines, positioned perisynaptically but also in extrasynaptic positions along the spine membranes (PubMed:20857303). Detected at presynaptic calices of Held (By similarity). Colocalizes with the cortical actin cytoskeleton and the Arp2/3 complex (By similarity).By similarity1 Publication
Cytoskeleton
- cytoskeleton Source: UniProtKB-SubCell
Plasma Membrane
- axolemma Source: RGD
- dendrite membrane Source: RGD
- dendritic spine membrane Source: UniProtKB-SubCell
- integral component of postsynaptic membrane Source: SynGO
- integral component of presynaptic membrane Source: SynGO
- neuronal cell body membrane Source: RGD
- plasma membrane Source: UniProtKB
- voltage-gated potassium channel complex Source: UniProtKB
Other locations
- axon Source: GO_Central
- axon terminus Source: RGD
- cell cortex Source: UniProtKB-SubCell
- glutamatergic synapse Source: SynGO
- integral component of membrane Source: GO_Central
- neuromuscular junction Source: RGD
- perikaryon Source: UniProtKB-SubCell
Topology
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Topological domaini | 1 – 291 | CytoplasmicSequence analysisAdd BLAST | 291 | |
Transmembranei | 292 – 310 | Helical; Name=Segment S1Sequence analysisAdd BLAST | 19 | |
Transmembranei | 352 – 371 | Helical; Name=Segment S2Sequence analysisAdd BLAST | 20 | |
Topological domaini | 372 – 380 | CytoplasmicSequence analysis | 9 | |
Transmembranei | 381 – 399 | Helical; Name=Segment S3Sequence analysisAdd BLAST | 19 | |
Transmembranei | 413 – 435 | Helical; Voltage-sensor; Name=Segment S4Sequence analysisAdd BLAST | 23 | |
Topological domaini | 436 – 448 | CytoplasmicSequence analysisAdd BLAST | 13 | |
Transmembranei | 449 – 470 | Helical; Name=Segment S5Sequence analysisAdd BLAST | 22 | |
Transmembranei | 519 – 540 | Helical; Name=Segment S6Sequence analysisAdd BLAST | 22 | |
Topological domaini | 541 – 889 | CytoplasmicSequence analysisAdd BLAST | 349 |
Keywords - Cellular componenti
Cell junction, Cell membrane, Cell projection, Cytoplasm, Cytoskeleton, Membrane, Postsynaptic cell membrane, SynapsePTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000054057 | 1 – 889 | Potassium voltage-gated channel subfamily C member 3Add BLAST | 889 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Glycosylationi | 321 | N-linked (GlcNAc...) asparagineSequence analysis | 1 | |
Modified residuei | 626 | Omega-N-methylarginineBy similarity | 1 | |
Modified residuei | 697 | PhosphoserineBy similarity | 1 | |
Modified residuei | 702 | PhosphoserineBy similarity | 1 | |
Modified residuei | 759 | PhosphothreonineBy similarity | 1 |
Post-translational modificationi
Keywords - PTMi
Glycoprotein, Methylation, PhosphoproteinProteomic databases
PaxDbi | Q01956 |
PRIDEi | Q01956 |
PTM databases
GlyGeni | Q01956, 1 site |
Expressioni
Tissue specificityi
Interactioni
Subunit structurei
Homotetramer. Heterotetramer with KCNC1.
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.
By similarityProtein-protein interaction databases
STRINGi | 10116.ENSRNOP00000027062 |
Family & Domainsi
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 1 – 80 | Important for normal N-type inactivationBy similarityAdd BLAST | 80 | |
Regioni | 10 – 66 | DisorderedSequence analysisAdd BLAST | 57 | |
Regioni | 202 – 231 | DisorderedSequence analysisAdd BLAST | 30 | |
Regioni | 557 – 627 | DisorderedSequence analysisAdd BLAST | 71 | |
Regioni | 691 – 834 | DisorderedSequence analysisAdd BLAST | 144 | |
Regioni | 852 – 889 | DisorderedSequence analysisAdd BLAST | 38 |
Motif
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Motifi | 504 – 509 | Selectivity filterBy similarity | 6 |
Compositional bias
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Compositional biasi | 23 – 43 | Pro residuesSequence analysisAdd BLAST | 21 | |
Compositional biasi | 566 – 605 | Pro residuesSequence analysisAdd BLAST | 40 | |
Compositional biasi | 757 – 780 | Pro residuesSequence analysisAdd BLAST | 24 |
Domaini
Sequence similaritiesi
Keywords - Domaini
Transmembrane, Transmembrane helixPhylogenomic databases
eggNOGi | KOG3713, Eukaryota |
InParanoidi | Q01956 |
PhylomeDBi | Q01956 |
Family and domain databases
Gene3Di | 1.20.120.350, 1 hit 3.30.710.10, 1 hit |
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 IPR011333, SKP1/BTB/POZ_sf IPR003131, T1-type_BTB IPR028325, VG_K_chnl IPR027359, Volt_channel_dom_sf |
PANTHERi | PTHR11537, PTHR11537, 1 hit |
Pfami | View protein in Pfam PF02214, BTB_2, 1 hit PF00520, Ion_trans, 1 hit |
PRINTSi | PR01582, KV33CHANNEL PR01491, KVCHANNEL PR01498, SHAWCHANNEL |
SMARTi | View protein in SMART SM00225, BTB, 1 hit |
SUPFAMi | SSF54695, SSF54695, 1 hit |
s (2+)i Sequence
Sequence statusi: Complete.
This entry describes 2 produced by isoformsialternative splicing. AlignAdd to basketThis entry has 2 described isoforms and 3 potential isoforms that are computationally mapped.Show allAlign All
This isoform has been chosen as the sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. canonicali
10 20 30 40 50
MLSSVCVWSF SGRQGTRKQH SQPAPTPQPP ESSPPPLLPP PQQQCAQPGT
60 70 80 90 100
AASPAGAPLS CGPGGRRAEP CSGLPAVAMG RHGGGGGDSG KIVINVGGVR
110 120 130 140 150
HETYRSTLRT LPGTRLAGLT EPEAAARFDY DPGTDEFFFD RHPGVFAYVL
160 170 180 190 200
NYYRTGKLHC PADVCGPLFE EELGFWGIDE TDVEACCWMT YRQHRDAEEA
210 220 230 240 250
LDSFEAPDSS GNANANAGGA HDAGLDDEAG AGGGGLDGAG GELKRLCFQD
260 270 280 290 300
AGGGAGGPAG GPGGAGGTWW RRWQPRVWAL FEDPYSSRAA RYVAFASLFF
310 320 330 340 350
ILISITTFCL ETHEGFIHIS NKTVTQASPI PGAPPENITN VEVETEPFLT
360 370 380 390 400
YVEGVCVVWF TFEFLMRVTF CPDKVEFLKS SLNIIDCVAI LPFYLEVGLS
410 420 430 440 450
GLSSKAAKDV LGFLRVVRFV RILRIFKLTR HFVGLRVLGH TLRASTNEFL
460 470 480 490 500
LLIIFLALGV LIFATMIYYA ERIGADPDDI LGSNHTYFKN IPIGFWWAVV
510 520 530 540 550
TMTTLGYGDM YPKTWSGMLV GALCALAGVL TIAMPVPVIV NNFGMYYSLA
560 570 580 590 600
MAKQKLPKKK NKHIPRPPQP GSPNYCKPDP PPPPPPHPHH GSGGISPPPP
610 620 630 640 650
ITPPSMGVTV AGAYPPGPHT HPGLLRGGAG GLGIMGLPPL PAPGEPCPLA
660 670 680 690 700
QEEVIETNRA GNDLGVLEEG DPRPNGDPAA AALAHEDCPA IDQPAMSPED
710 720 730 740 750
KSPITPGSRG RYSRDRACFL VTDYAPSPDG SIRKATGAPP LPPHAGVSQA
760 770 780 790 800
PPASCPTSTP TQQPGYPPSG RAPSPPQATP EAPAIFDVWL PPFHRSHQPP
810 820 830 840 850
GKHQRGGRHP GVSPSPQQRA CVGEPPSASH PQSLTLCISV PSSCHRLRPR
860 870 880
ETLGFPLSLP PRLATGNGGR ECPRDPGLPF PSRHSSPAV
The sequence of this isoform differs from the canonical sequence as follows:
662-679: NDLGVLEEGDPRPNGDPA → EAGARTGGVGRPGGWGSG
680-889: Missing.
Computationally mapped potential isoform sequencesi
There are 3 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basketQ811T3 | Q811T3_RAT | Kv3.3c voltage gated potassium chan... | Kcnc3 rCG_53749 | 769 | Annotation score: | ||
Q5PXK5 | Q5PXK5_RAT | Potassium voltage-gated channel sub... | Kcnc3 | 730 | Annotation score: | ||
F1LP15 | F1LP15_RAT | Potassium voltage-gated channel sub... | Kcnc3 | 889 | Annotation score: |
Alternative sequence
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Alternative sequenceiVSP_001022 | 662 – 679 | NDLGV…NGDPA → EAGARTGGVGRPGGWGSG in isoform KSHIIID.2. 1 PublicationAdd BLAST | 18 | |
Alternative sequenceiVSP_001023 | 680 – 889 | Missing in isoform KSHIIID.2. 1 PublicationAdd BLAST | 210 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | M84210 mRNA Translation: AAA73182.1 M84211 mRNA Translation: AAA41470.1 |
Genome annotation databases
UCSCi | RGD:621358, rat [Q01956-1] |
Keywords - Coding sequence diversityi
Alternative splicingSimilar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | M84210 mRNA Translation: AAA73182.1 M84211 mRNA Translation: AAA41470.1 |
3D structure databases
SMRi | Q01956 |
ModBasei | Search... |
Protein-protein interaction databases
STRINGi | 10116.ENSRNOP00000027062 |
Chemistry databases
GuidetoPHARMACOLOGYi | 550 |
PTM databases
GlyGeni | Q01956, 1 site |
Proteomic databases
PaxDbi | Q01956 |
PRIDEi | Q01956 |
Protocols and materials databases
ABCDi | Q01956, 1 sequenced antibody |
Genome annotation databases
UCSCi | RGD:621358, rat [Q01956-1] |
Organism-specific databases
RGDi | 621358, Kcnc3 |
Phylogenomic databases
eggNOGi | KOG3713, Eukaryota |
InParanoidi | Q01956 |
PhylomeDBi | Q01956 |
Enzyme and pathway databases
Reactomei | R-RNO-1296072, Voltage gated Potassium channels |
Miscellaneous databases
PROi | PR:Q01956 |
Family and domain databases
Gene3Di | 1.20.120.350, 1 hit 3.30.710.10, 1 hit |
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 IPR011333, SKP1/BTB/POZ_sf IPR003131, T1-type_BTB IPR028325, VG_K_chnl IPR027359, Volt_channel_dom_sf |
PANTHERi | PTHR11537, PTHR11537, 1 hit |
Pfami | View protein in Pfam PF02214, BTB_2, 1 hit PF00520, Ion_trans, 1 hit |
PRINTSi | PR01582, KV33CHANNEL PR01491, KVCHANNEL PR01498, SHAWCHANNEL |
SMARTi | View protein in SMART SM00225, BTB, 1 hit |
SUPFAMi | SSF54695, SSF54695, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | KCNC3_RAT | |
Accessioni | Q01956Primary (citable) accession number: Q01956 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | July 15, 1998 |
Last sequence update: | November 1, 1996 | |
Last modified: | February 23, 2022 | |
This is version 147 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- SIMILARITY comments
Index of protein domains and families