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KCNQ1 (potassium voltage-gated channel subfamily Q member 1)

Gene
Entrez ID Entrez Gene ID - the GENE ID in NCBI Gene database.
3784
Gene nameGene Name - the full gene name approved by the HGNC.
Potassium voltage-gated channel subfamily Q member 1
Gene symbolGene Symbol - the official gene symbol approved by the HGNC, which is a short abbreviated form of the gene name.
KCNQ1
SynonymsGene synonyms aliases
ATFB1, ATFB3, JLNS1, KCNA8, KCNA9, KVLQT1, Kv1.9, Kv7.1, LQT, LQT1, RWS, SQT2, WRS
ChromosomeChromosome number
11
Chromosome locationChromosomal Location - indicates the cytogenetic location of the gene or region on the chromosome.
11p15.5-p15.4
SummarySummary of gene provided in NCBI Entrez Gene.
This gene encodes a voltage-gated potassium channel required for repolarization phase of the cardiac action potential. This protein can form heteromultimers with two other potassium channel proteins, KCNE1 and KCNE3. Mutations in this gene are associated with hereditary long QT syndrome 1 (also known as Romano-Ward syndrome), Jervell and Lange-Nielsen syndrome, and familial atrial fibrillation. This gene exhibits tissue-specific imprinting, with preferential expression from the maternal allele in some tissues, and biallelic expression in others. This gene is located in a region of chromosome 11 amongst other imprinted genes that are associated with Beckwith-Wiedemann syndrome (BWS), and itself has been shown to be disrupted by chromosomal rearrangements in patients with BWS. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Aug 2011]
SNPsSNP information provided by dbSNP.
SNP ID Visualize variation Clinical significance Consequence
rs179489 G>A,C Not-provided, pathogenic Missense variant, coding sequence variant
rs1800171 G>A,C,T Likely-pathogenic, pathogenic Synonymous variant, coding sequence variant
rs12720457 G>T Benign, likely-benign, benign-likely-benign, conflicting-interpretations-of-pathogenicity Coding sequence variant, missense variant
rs12720458 A>G Pathogenic, pathogenic-likely-pathogenic, likely-pathogenic Coding sequence variant, missense variant
rs12720459 C>A,G,T Pathogenic, not-provided Coding sequence variant, missense variant
miRNAmiRNA information provided by mirtarbase database.
miRTarBase ID miRNA Experiments Reference
MIRT002925 hsa-miR-133a-3p Luciferase reporter assay, Western blot, 5\'RACE, Real time RT-PCR 17443681
Gene ontology (GO)Gene ontology information of associated ontologies with gene provided by GO database.
GO ID Ontology Definition Evidence Reference
GO:0005249 Function Voltage-gated potassium channel activity IBA 21873635
GO:0005249 Function Voltage-gated potassium channel activity IDA 8900283, 17289006, 24855057
GO:0005249 Function Voltage-gated potassium channel activity IDA 16002409
GO:0005251 Function Delayed rectifier potassium channel activity IBA 21873635
GO:0005251 Function Delayed rectifier potassium channel activity IDA 12522251, 24184248, 24269949, 25037568
Other IDsOther ids provides unique ids of gene in databases such as OMIM, HGNC, ENSEMBLE.
MIM
HGNC
e!Ensembl
Protein
UniProt ID P51787
Protein name Potassium voltage-gated channel subfamily KQT member 1 (IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1) (KQT-like 1) (Voltage-gated potassium channel subunit Kv7.1)
Protein function Potassium channel that plays an important role in a number of tissues, including heart, inner ear, stomach and colon (PubMed:10646604, PubMed:25441029). Associates with KCNE beta subunits that modulates current kinetics (PubMed:9312006, PubMed:9108097, PubMed:8900283, PubMed:10646604, PubMed:11101505, PubMed:19687231). Induces a voltage-dependent current by rapidly activating and slowly deactivating potassium-selective outward current (PubMed:9312006, PubMed:9108097, PubMed:8900283, PubMed:10646604, PubMed:11101505, PubMed:25441029). Promotes also a delayed voltage activated potassium current showing outward rectification characteristic (By similarity). During beta-adrenergic receptor stimulation participates in cardiac repolarization by associating with KCNE1 to form the I(Ks) cardiac potassium current that increases the amplitude and slows down the activation kinetics of outward potassium current I(Ks) (By similarity) (PubMed:9312006, PubMed:9108097, PubMed:8900283, PubMed:10646604, PubMed:11101505). Muscarinic agonist oxotremorine-M strongly suppresses KCNQ1/KCNE1 current (PubMed:10713961). When associated with KCNE3, forms the potassium channel that is important for cyclic AMP-stimulated intestinal secretion of chloride ions (PubMed:10646604). This interaction with KCNE3 is reduced by 17beta-estradiol, resulting in the reduction of currents (By similarity). During conditions of increased substrate load, maintains the driving force for proximal tubular and intestinal sodium ions absorption, gastric acid secretion, and cAMP-induced jejunal chloride ions secretion (By similarity). Allows the provision of potassium ions to the luminal membrane of the secretory canaliculus in the resting state as well as during stimulated acid secretion (By similarity). When associated with KCNE2, forms a heterooligomer complex leading to currents with an apparently instantaneous activation, a rapid deactivation process and a linear current-voltage relationship and decreases the amplitude of the outward current (PubMed:11101505). When associated with KCNE4, inhibits voltage-gated potassium channel activity (PubMed:19687231). When associated with KCNE5, this complex only conducts current upon strong and continued depolarization (PubMed:12324418). Also forms a heterotetramer with KCNQ5; has a voltage-gated potassium channel activity (PubMed:24855057). Binds with phosphatidylinositol 4,5-bisphosphate (PubMed:25037568). ; [Isoform 2]: Non-functional alone but modulatory when coexpressed with the full-length isoform 1.
PDB 3BJ4 , 3HFC , 3HFE , 4UMO , 4V0C , 6MIE , 6UZZ , 6V00 , 6V01
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF00520 Ion_trans
122 359
Ion transport protein
Family
PF03520 KCNQ_channel
482 620
KCNQ voltage-gated potassium channel
Family
Sequence
MAAASSPPRAERKRWGWGRLPGARRGSAGLAKKCPFSLELAEGGPAGGALYAPIAPGAPG
PAPPASPAAPAAPPVASDLGPRPPVSLDPRVSIYSTRRPVLARTHVQGRVYNFLERPTGW
KCFVYHFAVFLIVLVCLIFSVLSTIEQYAALATGTLFWMEIVLVVFFGTEYVVRLWSAGC
RSKYVGLWGRLRFARKPISIIDLIVVVASMVVLCVGSKGQVFATSAIRGIRFLQILRMLH
VDRQGGTWRLLGSVVFIHRQELITTLYIGFLGLIFSSYFVYLAEKDAVNESGRVEFGSYA
DALWWGVVTVTTIGYGDKVPQTWVGKTIASCFSVFAISFFALPAGILGSGFALKVQQKQ
R
QKHFNRQIPAAASLIQTAWRCYAAENPDSSTWKIYIRKAPRSHTLLSPSPKPKKSVVVKK
KKFKLDKDNGVTPGEKMLTVPHITCDPPEERRLDHFSVDGYDSSVRKSPTLLEVSMPHFM
RTNSFAEDLDLEGETLLTPITHISQLREHHRATIKVIRRMQYFVAKKKFQQARKPYDVRD
VIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFISVSEKSKDRGSNTIGARLNRVEDKVT
QLDQRLALITDMLHQLLSLH
GGSTPGSGGPPREGGAHITQPCGSGGSVDPELFLPSNTLP
TYEQLTVPRRGPDEGS
Sequence length 676
Interactions View interactions

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