A Selective and Potent Blocker of CaV3.1 and CaV3.2 Channels
    Cat #: STK-800
  • Lyophilized Powder
  • Bioassay Tested
  • Origin

    Synthetic peptide

    MW: 7387 Da.
    Purity: >98%
    Form Lyophilized powder.
    Effective concentration 10-200 nM.
    Modifications Cys12-Cys61, Cys16-Cys37, Cys23-Cys44, and Cys27-Cys46.
    • Kurtoxin
    Molecular formula C324H478N94O90S8.
    Activity Kurtoxin is a CaV3.1 and CaV3.2 channel blocker1,2.
    1. Chuang, R.S. et al. (1998) Nat. Neurosci. 1, 668.
    2. Lee, C.W. et al. (2011) Biochem. Biophys. Res. Commun. 416, 277.
    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 Soluble in DDW. Centrifuge all products before use (10000 x g 5 min).
    Storage of solutions Store at 4°C for up to 1 week. For longer periods, small aliquots should be stored at -20°C. Avoid multiple freezing and thawing.
    Our bioassay
    • Kurtoxin
      Alomone Labs Kurtoxin blocks CaV3.1 channels expressed in Xenopus oocytes.
      A. Representative time course of Kurtoxin (#STK-800) inhibition of CaV3.1 current. Membrane potential was held at -100 mV, current was elicited by a 100 ms voltage step to -30 mV every 10 sec, and significantly inhibited by application of 50 nM Kurtoxin (green). B. Superimposed traces of CaV3.1 current following the application of control (black) and of 50 nM Kurtoxin (green), taken from the recording in A.
    References - Scientific background
    1. Chuang, R.S. et al. (1998) Nat. Neurosci. 1, 668.
    2. Lee, C.W. et al. (2011) Biochem. Biophys. Res. Commun. 416, 277.
    3. Lee, C.W. et al. (2012) Biochemistry 51, 1862.
    Scientific background

    Kurtoxin is a peptide toxin originally isolated from the South African scorpion (Parabuthus transvaalicus) venom, and was the first characterized ligand for low voltage-gated calcium channels1,2. Kurtoxin potently blocks CaV3.1 and CaV3.2 channels displaying effective working concentrations as low as 50 nM.

    Although Kurtoxin is very similar to other scorpion isolated toxins (also known as α-toxins) that target sodium channels, detailed NMR analyses uncovered a unique configuration that distinguishes it from α-toxins and, therefore, is believed to be essential for Kurtoxin’s binding ability3.

    CaV3.1 and CaV3.2 are members of the T-type calcium channels that regulate calcium intake near resting membrane potential1. Members of the CaV3 ion channels control cardiac pacemaking, but may also play a role outside the nervous system as predicted by their overall distribution in the body1.

    Target CaV3.1, CaV3.2 channels
    Net Peptide Content: 100%
    Last update: 24/01/2020

    Kurtoxin (#STK-800) is a highly pure, synthetic, and biologically active peptide toxin.

    For research purposes only, not for human use
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