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Results reveal a role for the KCNQ1 potassium channel (zeige KCNAB2 Proteine) in the regulation of growth, and show that growth hormone (zeige GH1 Proteine) deficiency associated with maternally inherited gingival fibromatosis is an allelic disorder with cardiac arrhythmia syndromes caused by KCNQ1 mutations.
The conservation of homologous residues in helix B of other Kv7 subtypes confer similar competition of Ca(2+)-calmodulin (CaM) with PIP2 binding to their proximal C-termini and suggest that PIP2-CaM interactions converge to Kv7 helix B to modulates channel activity in a Kv7 subtype-dependent manner.
expression of the nearby cyclindependent kinase inhibitor 1C (CDKN1C (zeige CDKN1C Proteine)) gene was revealed to be upregulated after SP3 knockdown in cells that possessed non-risk alleles. This suggests that CDKN1C (zeige CDKN1C Proteine) is potentially one of the functional targets of SNP rs163184, which modulates the binding activity of the locus for Sp3 and Lsd1/Kdm1a (zeige KDM1A Proteine)
All the protein systems generated through these processes were refined by long Molecular Dynamics simulations. The refined models were analyzed extensively to infer data about the interaction of KCNQ1 channel with its accessory KCNE1 (zeige KCNE1 Proteine) beta subunits.
Electron Microscopy of Full-Length alpha-Subunit (zeige POLG Proteine) of Human Potassium Channel (zeige KCNAB2 Proteine) Kv7.1
Predicting the Functional Impact of KCNQ1 Variants of Unknown Significance
Low KCNQ1 expression is associated with colorectal cancer.
SUMOylation of KCNQ1 is KCNE1 (zeige KCNE1 Proteine) dependent and determines the native attributes of cardiac IKs in vivo.
these data strongly suggest that KCNQ1 genetic polymorphism influences repaglinide response due to the pivotal role of KCNQ1 in regulating insulin (zeige INS Proteine) resistance through the IRS-2 (zeige IRS2 Proteine)/PI(3 (zeige PI3 Proteine))K/Akt (zeige AKT1 Proteine) signaling pathway.
Residues K526 and K527 in Kv7.1 helix B form a critical site where CaM competes with PIP2 to stabilize the channel open state. The LQT mutant K526E revealed a severely impaired channel function with a right shift in the voltage dependence of activation, a reduced current density, and insensitivity to gating modulation by Ca(2+)-CaM.
the single KCNQ channel in Drosophila (dKCNQ) has similar electrophysiological properties to neuronal KCNQ2 (zeige KCNQ2 Proteine)/3
Data show that Drosophila KCNQ (dKCNQ) is a slowly activating and slowly-deactivating K(+) current open at sub-threshold potentials that has similar properties to neuronal KCNQ2 (zeige KCNQ2 Proteine)/3 with some features of the cardiac KCNQ1/KCNE1 (zeige KCNE1 Proteine).
A maternal contribution of KCNQ protein and/or mRNA is essential for early embryonic development
The enhanced sensitivity of KCNQ1 gain-of-function mutations for HMR (zeige NR4A1 Proteine)-1556 suggests the possibility of selective therapeutic targeting, and a potential proof of principle for genotype-specific treatment of this heritable arrhythmia.
There were substantial transmural gradients in Cav1.2, KChIP2, ERG, KvLQT1, Kir2.1, NCX1, SERCA2a and RyR2 at the mRNA and, in some cases, protein level-in every case the mRNA or protein was more abundant in the epicardium than the endocardium.
This study describes one physiological form of KCNQ1, depolarized voltage sensors with a closed pore in the absence of PIP2, and reveals a regulatory interaction between CaM and KCNQ1 that may explain CaM-mediated Long QT Syndrome.
KCNE1 (zeige KCNE1 Proteine)/KCNQ1 was expressed in Xenopus oocytes with and without beta-catenin (zeige CTNNB1 Proteine). Confocal microscopy revealed that beta-catenin (zeige CTNNB1 Proteine) enhanced the KCNE1 (zeige KCNE1 Proteine)/KCNQ1 protein abundance in the cell membrane.
results indicate that AMPK (zeige PRKAA2 Proteine) inhibits KCNQ1 activity by promoting Nedd4-2 (zeige NEDD4L Proteine)-dependent channel ubiquitination and retrieval from the plasma membrane.
S1 constrains S4 in the voltage sensor domain of Kv7.1 K+ channels
characterize a new component of the early bioelectrical circuit: the potassium channel (zeige KCNAB2 Proteine) KCNQ1 and its accessory subunit KCNE1 (zeige KCNE1 Proteine)
Slow delayed rectifier potassium currents mediated by mutant KCNQ1(Y111C) or KCNQ1(L114P) are paradoxically reduced by serum- and glucocorticoid-inducible kinase 1.
phenylboronic acid (PBA) activates KCNQ1/KCNE1 (zeige KCNE1 Proteine) complexes
Collectively, the authors propose that Prmt1 (zeige PRMT1 Proteine)-dependent facilitation of KCNQ-phosphatidylinositol-4,5-bisphosphate interaction underlies the positive regulation of KCNQ activity by arginine methylation, which may serve as a key target for prevention of neuronal hyperexcitability and seizures.
we investigated the effects of KCNQ1 A340E, a loss-of-function mutant. J343 mice bearing KCNQ1 A340E demonstrated a much higher 24-h intake of electrolytes (potassium, sodium, and chloride). KCNQ1, therefore, is suggested to play a central role in electrolyte metabolism. KCNQ1 A340E, with the loss-of-function phenotype, may dysregulate electrolyte homeostasis
The electrophysiological effects of BACE1 (zeige BACE Proteine) on KCNQ1 reported here were independent of its enzymatic activity.
Loss of methylation at the Kcnq1 imprinted gDMD was strongly associated with trophoblast giant cell (TGC (zeige TGM2 Proteine)) expansion.
Data show that disruption of potassium voltage-gated channel, KQT-like subfamily Q, member1 (KCNQ1) results in increased expression of cyclin-dependent kinase inhibitor 1C (Cdkn1c (zeige CDKN1C Proteine)) only when the mutation is on the paternal allele.
S3 mutations in KCNQ1 cause diverse kinetic defects in I(Ks), affecting opening and closing properties, and can account for LQT1 (zeige ARFGAP1 Proteine) phenotypes.
Characterization of the imprinted Kcnq1 domain which contains a differentially methylated region in intron 11 of Kcnq1.
KCNQ1, KCNE2 (zeige KCNE2 Proteine), and SMIT1 (zeige SLC5A3 Proteine) form reciprocally regulating complexes that affect neuronal excitability.
low expression of KCNQ1 expression was significantly associated with poor overall survival.
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.
IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1
, kidney and cardiac voltage dependend K+ channel
, potassium voltage-gated channel subfamily KQT member 1
, slow delayed rectifier channel subunit
, voltage-gated potassium channel subunit Kv7.1
, KCNQ-type K[+] channel
, Potassium voltage-gated channel subfamily KQT member 1
, potassium channel protein (KvLQT1)
, ventricular voltage-gated K+ channel pore-forming subunit KCNQ1
, KvLQT1 voltage-gated delayed rectifier potassium channel
, potassium voltage-gated channel, KQT-like subfamily, member 1
, potassium channel protein KCNQ1
, potassium voltage-gated channel, subfamily Q, member 1
, voltage gated potassium channel subunit
, KQT-like 1
, IKs producing slow voltage-gated potassium channel subunit alpha xKvLQT1
, Voltage-gated potassium channel subunit Kv7.1
, potassium channel protein