A Potent Activator of KCa3.1 and KCa2 Channels and a Blocker of TRPM7 Channel 
    Cat #: S-120
  • Lyophilized Powder
  • Bioassay Tested
  • Source Synthetic
    MW: 200.2
    Purity: >98%
    Effective concentration 0.1-10 µM.
    • SKA-31
    Chemical name Naphtho[1,2-d]thiazol-2-ylamine.
    Molecular formula C11H8N2S.
    CAS No.: 40172-65-4.
    Activity SKA-31 is an activator of KCa3.1 and KCa2 channels (EC50 values are 260, 2900, 2900 nM for KCa3.1, KCa2.1 and KCa2.2 respectively)1. Potentiates acetylcholine-induced EDHF-type dilations of mouse carotid arteries and lowers blood pressure in normotensive and hypertensive mice1,2. SKA-31 blocks TRPM73.
    1. Sankaranarayanan, A. et al. (2009) Mol. Pharmacol. 75, 281.
    2. Brahler, S. et al. (2009) Circulation 119, 2323.
    3. Chubanov, V. et al. (2012) Br. J. Pharmacol. 166, 1357.
    Shipping and storage Shipped at room temperature. Product as supplied can be stored intact at room temperature for several weeks. For longer periods, it should be stored at -20°C.
    Solubility DMSO. Centrifuge all product preparations before use (10000 x g 5 min).
    Storage of solutions Up to four weeks at 4°C or three months at -20°C.
    Our bioassay
    • SKA-31
      Alomone Labs SKA-31 enhances KCa3.1 channel currents in HEK293T cells.
      A. Time course of KCa3.1 channel activity at -10 mV demonstrating the effect of 10 μM SKA-31 (#S-120). B. Representative current traces under control conditions and following application of 10 μM SKA-31.Currents were elicited by a 150 ms voltage ramp from -120 to 60 mV every 10 seconds from a holding potential of -80 mV (current responses are shown between -120 and 0 mV).
    References - Scientific background
    1. Kohler, M. et al. (1996) Science 273, 1709.
    2. Ishii, T.M. et al. (1997) Proc. Natl. Acad. Sci. U.S.A 94, 11651.
    3. Taylor, M.S. et al. (2003) Circ. Res. 93, 124.
    4. Wulff, H. et al. (2007) Curr. Med. Chem. 14, 1437.
    5. Edwards, Get al. (1998) Nature 396, 269.
    6. Eichler, I. et al. (2003) Br. J. Pharmacol. 138, 594.
    7. Fleming, I. et al. (2006) Circ. Res. 99, 462.
    8. Kohler, R. et al. (2007) Kidney. Int. 72, 145.
    9. Si, H. et al. (2006) Circ. Res. 99, 537.
    10. Sankaranarayanan, A. et al. (2009) Mol. Pharmacol. 75, 281.
    11. Brahler, S. et al. (2009) Circulation 119, 2323.
    12. Chubanov, V. et al. (2012) Br. J. Pharmacol. 166, 1357.
    Scientific background

    Ca2+-activated potassium channels (KCa) are a group of 6/7-TM proteins that selectively transport K+ ions across biological membranes. They are broadly classified into three subtypes: SK, IK and BK channels (small, intermediate and big conductance, respectively). The three small-conductance Ca2+-activated K+ channels KCa2.1 (SK1), KCa2.2 (SK2), and KCa2.3 (SK3)1, and the intermediate-conductance KCa3.1 channel (IK1, SK4) play important roles in various physiological functions by modulating Ca2+-signaling cascades and regulating membrane potential, in the CNS and also peripherally1-2.

    Outside of the nervous system KCa2 channels, especially KCa2.3, are involved in blood pressure regulation3, contractility of urinary bladder smooth muscle and metabolism4. Like KCa2.3, KCa3.1 is further expressed in vascular endothelium and contributes to blood pressure control by initiating the so-called endothelium derived hyperpolarizing factor (EDHF) response, a nitric oxide and prostacyclin independent component of endothelium-dependent relaxation5-9.

    SKA-31 is an activator of KCa3.1 and KCa2 channels (EC50 values are 260, 2900, 2900, 1900 nM for KCa3.1, KCa2.1, KCa2.3 and KCa2.2 respectively)10. It potentiates acetylcholine-induced EDHF-type dilations of mouse carotid arteries and lowers blood pressure in normotensive and hypertensive mice, by 4-6 and 12 mmHg, respectively10-11.

    SKA-31 was found to block TRPM7 channels, demonstrating an overlap between pharmacological compounds acting on TRP and KCa channels12.

    Target KCa2, KCa3.1, TRPM7 channels
    Last update: 24/01/2020

    SKA-31 (#S-120) is a highly pure, synthetic, and biologically active compound.

    For research purposes only, not for human use



    Scientific Background


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