TARGETID

T49526

FORMERID

TTDS00148

UNIPROID

KCNQ1_HUMAN

TARGNAME

Voltage-gated potassium channel Kv7.1 (KCNQ1)

GENENAME

KCNQ1

TARGTYPE

Successful target

SYNONYMS

Voltage-gated potassium channel subunit Kv7.1; Potassium voltage-gated channel subfamily KQT member 1; Kv7.1; KVLQT1; KQT-like 1; KCNQ1 channel; KCNA9; KCNA8; IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1; IKs producing slow voltage-gated potassium channel alpha subunit KvLQT1

FUNCTION

Associates with KCNE beta subunits that modulates current kinetics. Induces a voltage-dependent by rapidly activating and slowly deactivating potassium-selective outward current. Promotes also a delayed voltage activated potassium current showing outward rectification characteristic. 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). Muscarinic agonist oxotremorine-M strongly suppresses KCNQ1/KCNE1 current. When associated with KCNE3, forms the potassium channel that is important for cyclic AMP-stimulated intestinal secretion of chloride ions. This interaction with KCNE3 is reduced by 17beta-estradiol, resulting in the reduction of currents. 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. 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. 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. When associated with KCNE4, inhibits voltage-gated potassium channel activity. When associated with KCNE5, this complex only conducts current upon strong and continued depolarization. Also forms a heterotetramer with KCNQ5; has a voltage-gated potassium channel activity. Binds with phosphatidylinositol 4,5-bisphosphate. Potassium channel that plays an important role in a number of tissues, including heart, inner ear, stomach and colon.

PDBSTRUC

4V0C; 4UMO; 3HFE; 3HFC; 3BJ4

BIOCLASS

Voltage-gated ion channel

SEQUENCE

MAAASSPPRAERKRWGWGRLPGARRGSAGLAKKCPFSLELAEGGPAGGALYAPIAPGAPGPAPPASPAAPAAPPVASDLGPRPPVSLDPRVSIYSTRRPVLARTHVQGRVYNFLERPTGWKCFVYHFAVFLIVLVCLIFSVLSTIEQYAALATGTLFWMEIVLVVFFGTEYVVRLWSAGCRSKYVGLWGRLRFARKPISIIDLIVVVASMVVLCVGSKGQVFATSAIRGIRFLQILRMLHVDRQGGTWRLLGSVVFIHRQELITTLYIGFLGLIFSSYFVYLAEKDAVNESGRVEFGSYADALWWGVVTVTTIGYGDKVPQTWVGKTIASCFSVFAISFFALPAGILGSGFALKVQQKQRQKHFNRQIPAAASLIQTAWRCYAAENPDSSTWKIYIRKAPRSHTLLSPSPKPKKSVVVKKKKFKLDKDNGVTPGEKMLTVPHITCDPPEERRLDHFSVDGYDSSVRKSPTLLEVSMPHFMRTNSFAEDLDLEGETLLTPITHISQLREHHRATIKVIRRMQYFVAKKKFQQARKPYDVRDVIEQYSQGHLNLMVRIKELQRRLDQSIGKPSLFISVSEKSKDRGSNTIGARLNRVEDKVTQLDQRLALITDMLHQLLSLHGGSTPGSGGPPREGGAHITQPCGSGGSVDPELFLPSNTLPTYEQLTVPRRGPDEGS

DRUGINFO

Indapamide

DRUGINFO

L-768673

DRUGINFO

(3R,4S)-293B

DRUGINFO

3S,4R-293B

DRUGINFO

HMR-1556

DRUGINFO

IKs124

DRUGINFO

L-735,821

DRUGINFO

ML277

DRUGINFO

N-(2-Diethylamino-ethyl)-4-hexyloxy-benzamide