• Product nameAnti-KCNQ1 antibody [S37A-10]
    See all KCNQ1 primary antibodies
  • Description
    Mouse monoclonal [S37A-10] to KCNQ1
  • Tested applicationsSuitable for: IP, Flow Cyt, IHC-P, IHC-Fr, WB, ICC/IFmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen


  • Positive control
    • Lysate from transfected COS-1 cells transiently expressing KCNQ1.



Our Abpromise guarantee covers the use of ab84819 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IP Use at an assay dependent concentration.
Flow Cyt Use 1µg for 106 cells. ab170190-Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.
IHC-P Use a concentration of 0.1 - 1 µg/ml.
IHC-Fr Use a concentration of 0.1 - 1 µg/ml.
WB Use a concentration of 1 - 10 µg/ml. Predicted molecular weight: 75 kDa.
ICC/IF Use a concentration of 1 - 10 µg/ml.


  • FunctionPotassium channel that plays an important role in a number of tissues, including heart, inner ear, stomach and colon (By similarity) (PubMed:10646604). Associates with KCNE beta subunits that modulates current kinetics (By similarity) (PubMed:9312006, PubMed:9108097, PubMed:8900283, PubMed:10646604, PubMed:11101505, PubMed:19687231). Induces a voltage-dependent by rapidly activating and slowly deactivating potassium-selective outward current (By similarity) (PubMed:9312006, PubMed:9108097, PubMed:8900283, PubMed:10646604, PubMed:11101505). 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.
  • Tissue specificityAbundantly expressed in heart, pancreas, prostate, kidney, small intestine and peripheral blood leukocytes. Less abundant in placenta, lung, spleen, colon, thymus, testis and ovaries.
  • Involvement in diseaseLong QT syndrome 1
    Jervell and Lange-Nielsen syndrome 1
    Atrial fibrillation, familial, 3
    Short QT syndrome 2
    Diabetes mellitus, non-insulin-dependent
  • Sequence similaritiesBelongs to the potassium channel family. KQT (TC 1.A.1.15) subfamily. Kv7.1/KCNQ1 sub-subfamily.
  • DomainThe segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position.
    The coiled-coil domain mediates tetramerization.
    The segment S6 is involved in the inhibition of voltage-gated potassium channel activity by KCNE4.
    The C-terminal assembly domain promotes self-interactiona; allows functional channel.
  • Post-translational
    Phosphorylation at Ser-27 by PKA; increases delayed rectifier potassium channel activity of the KCNQ1-KCNE1 complex through a macromolecular complex that includes PKA, PP1, and the targeting protein AKAP9.
    Ubiquitinated by NEDD4L; promotes internalization (PubMed:22024150). The ubiquitinylated form is internalized through a clathrin-mediated endocytosis by interacting with AP2M1 and is recycled back to the cell membrane via RAB4A and RAB11A (PubMed:23529131).
    Deubiquitinated by USP2; counteracts the NEDD4L-specific down-regulation of I(Ks) and restores the membrane localization.
  • Cellular localizationCell membrane. Cytoplasmic vesicle membrane. Early endosome. Membrane raft. Endoplasmic reticulum. Basolateral cell membrane. Colocalized with KCNE3 at the plasma membrane (PubMed:10646604). Upon 17beta-oestradiol treatment, colocalizes with RAB5A at early endosome (PubMed:23529131). Heterotetramer with KCNQ5 is highly retained at the endoplasmic reticulum and is localized outside of lipid raft microdomains (PubMed:24855057). During the early stages of epithelial cell polarization induced by the calcium switch it removed from plasma membrane to the endoplasmic reticulum where it retained and it is redistributed to the basolateral cell surface in a PI3K-dependent manner at a later stage (PubMed:21228319).
  • Information by UniProt
  • Database links
  • FormThere are 2 isoforms produced by alternative splicing. Isoform 2 also known as: TKvLQT1.
  • Alternative names
    • ATFB1 antibody
    • ATFB3 antibody
    • FLJ26167 antibody
    • IKs producing slow voltage-gated potassium channel subunit alpha antibody
    • IKs producing slow voltage-gated potassium channel subunit alpha KvLQT1 antibody
    • Jervell and Lange-Nielsen syndrome 1 antibody
    • JLNS1 antibody
    • KCNA8 antibody
    • KCNA9 antibody
    • KCNQ1 antibody
    • KCNQ1_HUMAN antibody
    • kidney and cardiac voltage dependend K+ channel antibody
    • KQT-like 1 antibody
    • Kv1.9 antibody
    • Kv7.1 antibody
    • KVLQT1 antibody
    • long (electrocardiographic) QT syndrome, Ward-Romano syndrome 1 antibody
    • LQT antibody
    • LQT1 antibody
    • Potassium channel, voltage-gated, shaker-relatd subfamily, member 9 antibody
    • Potassium voltage-gated channel subfamily KQT member 1 antibody
    • potassium voltage-gated channel, KQT-like subfamily, member 1 antibody
    • RWS antibody
    • slow delayed rectifier channel subunit antibody
    • SQT2 antibody
    • Voltage-gated potassium channel subunit Kv7.1 antibody
    • WRS antibody
    see all

Anti-KCNQ1 antibody [S37A-10] images

  • All lanes : Anti-KCNQ1 antibody [S37A-10] (ab84819) at 1 µg/ml

    Lane 1 : Molecular weight marker
    Lane 2 : Cell lysates prepared from CHO-T cells transfected with mink-KvLQT1

    Predicted band size : 75 kDa
  • ab84819 staining KCNQ1 in human hippocampal tissue by IHC-P (Bouin's fixative fixed paraffin embedded). The sample was incubated with primary antibody at 100 and with a fluorophore conjugated anti mouse secondary at 1/50 dilution.

  • Overlay histogram showing HEK293 cells stained with ab84819 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab84819, 1µg/1x106 cells) for 30 min at 22ºC. The secondary antibody used was DyLight® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution for 30 min at 22ºC. Isotype control antibody (black line) was mouse IgG1 [ICIGG1] (ab91353, 2µg/1x106 cells) used under the same conditions. Acquisition of >5,000 events was performed.

References for Anti-KCNQ1 antibody [S37A-10] (ab84819)

This product has been referenced in:

See 1 Publication for this product

Product Wall

Thank you for contacting us.

The blocking peptide for the rabbit polyclonal anti-KCNE1 is now available, the catalog reference number is ab151760 and the link to the datasheet is http://www.abcam.com/ab151760.

Unfortunately, the pepti...

Read More