KCNQ1_PIG
ID KCNQ1_PIG Reviewed; 673 AA.
AC Q9TTJ7; A0A287A438;
DT 01-JUN-2001, integrated into UniProtKB/Swiss-Prot.
DT 07-OCT-2020, sequence version 2.
DT 03-AUG-2022, entry version 105.
DE RecName: Full=Potassium voltage-gated channel subfamily KQT member 1 {ECO:0000250|UniProtKB:P51787};
DE AltName: Full=IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1 {ECO:0000250|UniProtKB:P51787};
DE AltName: Full=KQT-like 1 {ECO:0000250|UniProtKB:P51787};
DE AltName: Full=Voltage-gated potassium channel subunit Kv7.1 {ECO:0000250|UniProtKB:P51787};
GN Name=KCNQ1 {ECO:0000250|UniProtKB:P51787};
GN Synonyms=KVLQT1 {ECO:0000250|UniProtKB:P51787};
OS Sus scrofa (Pig).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Laurasiatheria; Artiodactyla; Suina; Suidae; Sus.
OX NCBI_TaxID=9823;
RN [1] {ECO:0000312|Proteomes:UP000008227}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Duroc {ECO:0000312|Proteomes:UP000008227};
RG Porcine genome sequencing project;
RL Submitted (NOV-2009) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [MRNA].
RC TISSUE=Coronary artery;
RA Imaizumi Y., Ohya S.;
RT "Effects of MS-551 on delayed rectifier K current in coronary artery smooth
RT muscle cells.";
RL Submitted (OCT-1999) to the EMBL/GenBank/DDBJ databases.
RN [3] {ECO:0000312|EMBL:HDA68746.1}
RP IDENTIFICATION.
RX PubMed=30723633; DOI=10.7717/peerj.6374;
RA Gilbert D.G.;
RT "Genes of the pig, Sus scrofa, reconstructed with EvidentialGene.";
RL PeerJ 7:E6374-E6374(2019).
CC -!- FUNCTION: Potassium channel that plays an important role in a number of
CC tissues, including heart, inner ear, stomach and colon (By similarity).
CC Associates with KCNE beta subunits that modulates current kinetics (By
CC similarity). Induces a voltage-dependent by rapidly activating and
CC slowly deactivating potassium-selective outward current (By
CC similarity). Promotes also a delayed voltage activated potassium
CC current showing outward rectification characteristic (By similarity).
CC During beta-adrenergic receptor stimulation participates in cardiac
CC repolarization by associating with KCNE1 to form the I(Ks) cardiac
CC potassium current that increases the amplitude and slows down the
CC activation kinetics of outward potassium current I(Ks) (By similarity).
CC Muscarinic agonist oxotremorine-M strongly suppresses KCNQ1/KCNE1
CC current (By similarity). When associated with KCNE3, forms the
CC potassium channel that is important for cyclic AMP-stimulated
CC intestinal secretion of chloride ions (By similarity). This interaction
CC with KCNE3 is reduced by 17beta-estradiol, resulting in the reduction
CC of currents (By similarity). During conditions of increased substrate
CC load, maintains the driving force for proximal tubular and intestinal
CC sodium ions absorption, gastric acid secretion, and cAMP-induced
CC jejunal chloride ions secretion (By similarity). Allows the provision
CC of potassium ions to the luminal membrane of the secretory canaliculus
CC in the resting state as well as during stimulated acid secretion (By
CC similarity). When associated with KCNE2, forms a heterooligomer complex
CC leading to currents with an apparently instantaneous activation, a
CC rapid deactivation process and a linear current-voltage relationship
CC and decreases the amplitude of the outward current (By similarity).
CC When associated with KCNE4, inhibits voltage-gated potassium channel
CC activity (By similarity). When associated with KCNE5, this complex only
CC conducts current upon strong and continued depolarization (By
CC similarity). Also forms a heterotetramer with KCNQ5 that has a voltage-
CC gated potassium channel activity (By similarity). Binds with
CC phosphatidylinositol 4,5-bisphosphate (By similarity).
CC {ECO:0000250|UniProtKB:P51787, ECO:0000250|UniProtKB:P97414,
CC ECO:0000250|UniProtKB:Q9Z0N7}.
CC -!- SUBUNIT: Tetramer. Heterotetramer with KCNE1; targets to the membrane
CC raft. Interacts (via C-terminus) with CALM; forms a heterooctameric
CC structure (with 4:4 KCNQ1:CALM stoichiometry) in a calcium-independent
CC manner. Interacts with AKAP9; targets protein kinase A (PKA) catalytic
CC and regulatory subunits and protein phosphatase 1 (PP1) to the KCNQ1-
CC KCNE1 complex, allowing PKA-mediated phosphorylation and increase of
CC delayed rectifier potassium channel activity. Interacts with KCNE2;
CC form a heterooligomer complex that targets to the membrane raft and
CC leading to currents with an apparently instantaneous activation, a
CC rapid deactivation process and a linear current-voltage relationship
CC and decreases the amplitude of the outward current. Interacts with
CC AP2M1; mediates estrogen-induced internalization via clathrin-coated
CC vesicles. Interacts with NEDD4L; promotes internalization and decreases
CC I(Ks) currents. Interacts with USP2; counteracts the NEDD4L-specific
CC down-regulation of I(Ks) and restore plasma membrane localization.
CC Heterotetramer with KCNQ5; has a voltage-gated potassium channel
CC activity. Interacts with KCNE3; alters membrane raft localization.
CC Interacts with KCNE4; impairs KCNQ1 localization in lipid rafts and
CC inhibits voltage-gated potassium channel activity. Interacts with
CC KCNE5; impairs KCNQ1 localization in lipid rafts and only conducts
CC current upon strong and continued depolarization.
CC {ECO:0000250|UniProtKB:P51787}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000250|UniProtKB:P51787};
CC Multi-pass membrane protein {ECO:0000250|UniProtKB:P51787}. Cytoplasmic
CC vesicle membrane {ECO:0000250|UniProtKB:P51787}. Early endosome
CC {ECO:0000250|UniProtKB:P51787}. Membrane raft
CC {ECO:0000250|UniProtKB:P51787}. Endoplasmic reticulum
CC {ECO:0000250|UniProtKB:P51787}. Basolateral cell membrane
CC {ECO:0000250|UniProtKB:P51787}. Note=Colocalized with KCNE3 at the
CC plasma membrane. Upon 17beta-oestradiol treatment, colocalizes with
CC RAB5A at early endosome. Heterotetramer with KCNQ5 is highly retained
CC at the endoplasmic reticulum and is localized outside of lipid raft
CC microdomains. During the early stages of epithelial cell polarization
CC induced by the calcium switch it removed from plasma membrane to the
CC endoplasmic reticulum where it retained and it is redistributed to the
CC basolateral cell surface in a PI3K-dependent manner at a later stage.
CC {ECO:0000250|UniProtKB:P51787}.
CC -!- DOMAIN: The segment S4 is probably the voltage-sensor and is
CC characterized by a series of positively charged amino acids at every
CC third position. {ECO:0000250|UniProtKB:P51787}.
CC -!- DOMAIN: The C-terminal coiled-coil domain interacts with a single CALM
CC molecule via the first two membrane-proximal helical regions, with CALM
CC forming a clamp-like structure. Binding of CALM C-terminus to the first
CC helical region is calcium-independent but is essential for assembly of
CC the structure. Binding of CALM N-terminus to the second helical region
CC is calcium-dependent and regulates electrophysiological activity of the
CC channel. {ECO:0000250|UniProtKB:P51787}.
CC -!- PTM: Ubiquitinated by NEDD4L; promotes internalization. The
CC ubiquitinylated form is internalized through a clathrin-mediated
CC endocytosis by interacting with AP2M1 and is recycled back to the cell
CC membrane via RAB4A and RAB11A. {ECO:0000250|UniProtKB:P51787}.
CC -!- PTM: Deubiquitinated by USP2; counteracts the NEDD4L-specific down-
CC regulation of I(Ks) and restores the membrane localization.
CC {ECO:0000250|UniProtKB:P51787}.
CC -!- SIMILARITY: Belongs to the potassium channel family. KQT (TC 1.A.1.15)
CC subfamily. Kv7.1/KCNQ1 sub-subfamily. {ECO:0000305}.
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DR EMBL; AEMK02000006; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR EMBL; AB033207; BAA88580.1; -; mRNA.
DR EMBL; DQIR01113270; HDA68746.1; -; Transcribed_RNA.
DR EMBL; DQIR01186501; HDB41978.1; -; Transcribed_RNA.
DR AlphaFoldDB; Q9TTJ7; -.
DR SMR; Q9TTJ7; -.
DR PRIDE; Q9TTJ7; -.
DR Ensembl; ENSSSCT00000053475; ENSSSCP00000038521; ENSSSCG00000039556.
DR Ensembl; ENSSSCT00025034227; ENSSSCP00025014257; ENSSSCG00025025273.
DR Ensembl; ENSSSCT00030103028; ENSSSCP00030047532; ENSSSCG00030073514.
DR Ensembl; ENSSSCT00045008924; ENSSSCP00045006061; ENSSSCG00045005372.
DR Ensembl; ENSSSCT00050012936; ENSSSCP00050005361; ENSSSCG00050009557.
DR Ensembl; ENSSSCT00055005087; ENSSSCP00055003934; ENSSSCG00055002634.
DR Ensembl; ENSSSCT00060050141; ENSSSCP00060021453; ENSSSCG00060036994.
DR Ensembl; ENSSSCT00065089963; ENSSSCP00065039344; ENSSSCG00065065522.
DR Ensembl; ENSSSCT00070029507; ENSSSCP00070024595; ENSSSCG00070015013.
DR VGNC; VGNC:99782; KCNQ1.
DR GeneTree; ENSGT00940000161001; -.
DR InParanoid; Q9TTJ7; -.
DR OrthoDB; 1168835at2759; -.
DR Proteomes; UP000008227; Chromosome 2.
DR Proteomes; UP000314985; Unassembled WGS sequence.
DR Bgee; ENSSSCG00000039556; Expressed in granulosa cell and 29 other tissues.
DR ExpressionAtlas; Q9TTJ7; baseline and differential.
DR GO; GO:0016324; C:apical plasma membrane; IEA:Ensembl.
DR GO; GO:1990794; C:basolateral part of cell; IEA:Ensembl.
DR GO; GO:0016323; C:basolateral plasma membrane; ISS:UniProtKB.
DR GO; GO:0009986; C:cell surface; IEA:Ensembl.
DR GO; GO:0097546; C:ciliary base; IEA:Ensembl.
DR GO; GO:0005737; C:cytoplasm; ISS:UniProtKB.
DR GO; GO:0030659; C:cytoplasmic vesicle membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0005769; C:early endosome; IEA:UniProtKB-SubCell.
DR GO; GO:0005783; C:endoplasmic reticulum; ISS:UniProtKB.
DR GO; GO:0016021; C:integral component of membrane; IBA:GO_Central.
DR GO; GO:0034702; C:ion channel complex; ISS:UniProtKB.
DR GO; GO:0005770; C:late endosome; IEA:Ensembl.
DR GO; GO:0005764; C:lysosome; IEA:Ensembl.
DR GO; GO:0045121; C:membrane raft; ISS:UniProtKB.
DR GO; GO:0043005; C:neuron projection; IEA:Ensembl.
DR GO; GO:0043025; C:neuronal cell body; IEA:Ensembl.
DR GO; GO:0005886; C:plasma membrane; ISS:UniProtKB.
DR GO; GO:0030133; C:transport vesicle; IEA:Ensembl.
DR GO; GO:0008076; C:voltage-gated potassium channel complex; IBA:GO_Central.
DR GO; GO:0005516; F:calmodulin binding; IBA:GO_Central.
DR GO; GO:0005251; F:delayed rectifier potassium channel activity; ISS:UniProtKB.
DR GO; GO:0015271; F:outward rectifier potassium channel activity; ISS:UniProtKB.
DR GO; GO:0005546; F:phosphatidylinositol-4,5-bisphosphate binding; ISS:UniProtKB.
DR GO; GO:0034236; F:protein kinase A catalytic subunit binding; IEA:Ensembl.
DR GO; GO:0034237; F:protein kinase A regulatory subunit binding; IEA:Ensembl.
DR GO; GO:0008157; F:protein phosphatase 1 binding; IEA:Ensembl.
DR GO; GO:0097110; F:scaffold protein binding; IEA:Ensembl.
DR GO; GO:0044325; F:transmembrane transporter binding; IEA:Ensembl.
DR GO; GO:0005249; F:voltage-gated potassium channel activity; ISS:UniProtKB.
DR GO; GO:0086089; F:voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization; IBA:GO_Central.
DR GO; GO:1902282; F:voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization; IBA:GO_Central.
DR GO; GO:0071875; P:adrenergic receptor signaling pathway; IEA:Ensembl.
DR GO; GO:0060117; P:auditory receptor cell development; IEA:Ensembl.
DR GO; GO:0030644; P:cellular chloride ion homeostasis; IEA:Ensembl.
DR GO; GO:0071320; P:cellular response to cAMP; IEA:Ensembl.
DR GO; GO:0071872; P:cellular response to epinephrine stimulus; IEA:Ensembl.
DR GO; GO:0071466; P:cellular response to xenobiotic stimulus; IEA:Ensembl.
DR GO; GO:0090102; P:cochlea development; IEA:Ensembl.
DR GO; GO:0035934; P:corticosterone secretion; IEA:Ensembl.
DR GO; GO:0050910; P:detection of mechanical stimulus involved in sensory perception of sound; IEA:Ensembl.
DR GO; GO:0030218; P:erythrocyte differentiation; IEA:Ensembl.
DR GO; GO:0001698; P:gastrin-induced gastric acid secretion; IEA:Ensembl.
DR GO; GO:0010467; P:gene expression; IEA:Ensembl.
DR GO; GO:0006006; P:glucose metabolic process; IEA:Ensembl.
DR GO; GO:0007507; P:heart development; IEA:Ensembl.
DR GO; GO:0048839; P:inner ear development; ISS:UniProtKB.
DR GO; GO:0042472; P:inner ear morphogenesis; IEA:Ensembl.
DR GO; GO:0050892; P:intestinal absorption; ISS:UniProtKB.
DR GO; GO:0015705; P:iodide transport; IEA:Ensembl.
DR GO; GO:0086009; P:membrane repolarization; ISS:UniProtKB.
DR GO; GO:0098914; P:membrane repolarization during atrial cardiac muscle cell action potential; IEA:Ensembl.
DR GO; GO:0098915; P:membrane repolarization during ventricular cardiac muscle cell action potential; IBA:GO_Central.
DR GO; GO:0010629; P:negative regulation of gene expression; IEA:Ensembl.
DR GO; GO:0050905; P:neuromuscular process; IEA:Ensembl.
DR GO; GO:1905515; P:non-motile cilium assembly; IEA:Ensembl.
DR GO; GO:0060452; P:positive regulation of cardiac muscle contraction; IEA:Ensembl.
DR GO; GO:0010460; P:positive regulation of heart rate; IEA:Ensembl.
DR GO; GO:1901381; P:positive regulation of potassium ion transmembrane transport; IEA:Ensembl.
DR GO; GO:0097623; P:potassium ion export across plasma membrane; IBA:GO_Central.
DR GO; GO:0055075; P:potassium ion homeostasis; IEA:Ensembl.
DR GO; GO:1990573; P:potassium ion import across plasma membrane; IEA:Ensembl.
DR GO; GO:0071805; P:potassium ion transmembrane transport; IBA:GO_Central.
DR GO; GO:0060372; P:regulation of atrial cardiac muscle cell membrane repolarization; IEA:Ensembl.
DR GO; GO:0008217; P:regulation of blood pressure; IEA:Ensembl.
DR GO; GO:0060453; P:regulation of gastric acid secretion; ISS:UniProtKB.
DR GO; GO:0006349; P:regulation of gene expression by genomic imprinting; IEA:Ensembl.
DR GO; GO:0086091; P:regulation of heart rate by cardiac conduction; IEA:Ensembl.
DR GO; GO:0060307; P:regulation of ventricular cardiac muscle cell membrane repolarization; IEA:Ensembl.
DR GO; GO:1905150; P:regulation of voltage-gated sodium channel activity; IEA:Ensembl.
DR GO; GO:0070293; P:renal absorption; ISS:UniProtKB.
DR GO; GO:0070294; P:renal sodium ion absorption; IEA:Ensembl.
DR GO; GO:0032868; P:response to insulin; IEA:Ensembl.
DR GO; GO:0035094; P:response to nicotine; IEA:Ensembl.
DR GO; GO:0007622; P:rhythmic behavior; IEA:Ensembl.
DR GO; GO:0035176; P:social behavior; IEA:Ensembl.
DR GO; GO:0062094; P:stomach development; IEA:Ensembl.
DR Gene3D; 1.20.120.350; -; 1.
DR InterPro; IPR005821; Ion_trans_dom.
DR InterPro; IPR003937; K_chnl_volt-dep_KCNQ.
DR InterPro; IPR013821; K_chnl_volt-dep_KCNQ_C.
DR InterPro; IPR005827; K_chnl_volt-dep_KCQN1.
DR InterPro; IPR028325; VG_K_chnl.
DR InterPro; IPR027359; Volt_channel_dom_sf.
DR PANTHER; PTHR11537; PTHR11537; 1.
DR PANTHER; PTHR11537:SF266; PTHR11537:SF266; 1.
DR Pfam; PF00520; Ion_trans; 1.
DR Pfam; PF03520; KCNQ_channel; 1.
DR PRINTS; PR01460; KCNQ1CHANNEL.
DR PRINTS; PR01459; KCNQCHANNEL.
PE 2: Evidence at transcript level;
KW Calmodulin-binding; Cell membrane; Cytoplasmic vesicle;
KW Endoplasmic reticulum; Endosome; Glycoprotein; Ion channel; Ion transport;
KW Membrane; Phosphoprotein; Potassium; Potassium channel;
KW Potassium transport; Reference proteome; Transmembrane;
KW Transmembrane helix; Transport; Ubl conjugation; Voltage-gated channel.
FT CHAIN 1..673
FT /note="Potassium voltage-gated channel subfamily KQT member
FT 1"
FT /id="PRO_0000054025"
FT TOPO_DOM 1..119
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 120..140
FT /note="Helical; Name=Segment S1"
FT /evidence="ECO:0000255"
FT TOPO_DOM 141..145
FT /note="Extracellular"
FT /evidence="ECO:0000305"
FT TRANSMEM 146..166
FT /note="Helical; Name=Segment S2"
FT /evidence="ECO:0000255"
FT TOPO_DOM 167..194
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 195..215
FT /note="Helical; Name=Segment S3"
FT /evidence="ECO:0000255"
FT TOPO_DOM 216..223
FT /note="Extracellular"
FT /evidence="ECO:0000305"
FT TRANSMEM 224..246
FT /note="Helical; Voltage-sensor; Name=Segment S4"
FT /evidence="ECO:0000255"
FT TOPO_DOM 247..259
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 260..280
FT /note="Helical; Name=Segment S5"
FT /evidence="ECO:0000255"
FT TOPO_DOM 281..297
FT /note="Extracellular"
FT /evidence="ECO:0000305"
FT INTRAMEM 298..318
FT /note="Pore-forming; Name=Segment H5"
FT /evidence="ECO:0000255"
FT TOPO_DOM 319..325
FT /note="Extracellular"
FT /evidence="ECO:0000305"
FT TRANSMEM 326..346
FT /note="Helical; Name=Segment S6"
FT /evidence="ECO:0000255"
FT TOPO_DOM 347..673
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT REGION 1..28
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 61..80
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 368..380
FT /note="Interaction with CALM"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT REGION 514..528
FT /note="Interaction with CALM; calcium-dependent"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT REGION 534..571
FT /note="Interaction with KCNE1 C-terminus"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT REGION 587..615
FT /note="Interaction with AKAP9"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT REGION 588..619
FT /note="C-terminal assembly domain"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT REGION 619..673
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT MOTIF 310..315
FT /note="Selectivity filter"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT MOD_RES 27
FT /note="Phosphoserine"
FT /evidence="ECO:0000250|UniProtKB:P51787"
FT MOD_RES 405
FT /note="Phosphoserine"
FT /evidence="ECO:0000250|UniProtKB:P97414"
FT MOD_RES 407
FT /note="Phosphoserine"
FT /evidence="ECO:0000250|UniProtKB:P97414"
FT CARBOHYD 287
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
SQ SEQUENCE 673 AA; 74032 MW; 23F4B913CD83540F CRC64;
MAAATSPPRA ERKRWGGGRL PGARRGSAGL AKKCPFSLEL AEGGPTGGAL YAPIGPPGVP
GPSSPAAPAA SPAAADLGPR PRVSLDPRVS IYSARRPLLA RTHIQGRVYN FLERPTGWKC
FVYHFAVFLI VLVCLIFSVL STIEQYVALA TGTLFWMEIV LVVFFGTEYA VRLWSAGCRS
KYVGIWGRLR FARKPISIID LIVVVASMVV LCVGSKGQVF ATSAIRGIRF LQILRMLHVD
RQGGTWRLLG SVVFIHRQEL ITTLYIGFLG LIFSSYFVYL AEKDAVNESG QVEFGSYADA
LWWGVVTVTT IGYGDKVPQT WVGKTIASCF SVFAISFFAL PAGILGSGFA LKVQQKQRQK
HFNRQIPAAA SLIQTAWRCY AAENPDSSTW KIYVRKPSRS QALLSPSPKP KKSVMVKKKK
FKLDKDNGLS PGEKMLAVPQ ITCDLASEEQ RPDHFSVDGC DNSVKKSPTL LEVSTAQFTR
TNSFAEDLDL EGETLLTPIT HVSQLREHHR ATIKVIRRMQ YFVAKKKFQQ ARKPYDVRDV
IEQYSQGHLN LMVRIKELQR RLDQSIGRPA LFISSSEKVK DRGSNTIGAR LNRVEDKVTQ
LDQRLELITD MLQQLLSLHR GGTPGSRAPG GGGAQVAQPC SGGSINPELF LPSNALPTYE
QLTVPGRGPE EGS
