GaTx2 is a selective blocker of ClC2 channel blocker
Sequenz
Val-Ser-Cys3-Glu-Asp-Cys6-Pro-Asp-His-Cys10-Ser-Thr-Gln-Lys-Ala-Arg-Ala-Lys-Cys19-Asp-Asn-Asp-Lys-Cys24-Val-Cys26-Glu-Pro-Ile-OHDisulfid e bonds between Cys3-Cys19, Cys6-Cys24,and Cys10-Cys26
Beschränkungen
Nur für Forschungszwecke einsetzbar
Target
GaTx2
Hintergrund
GaTx2 (gating modifier of anion channels 2) was isolated from the venom of Leiurus quinquestriatus hebraeus. GaTx2 is the most potent peptide inhibitor of ClC-2 chloride channel ever described. Kd value is close to 20 pM. GaTx2 slows ClC-2 activation but without altering channel conductance. The effect is voltage-dependent. It has no effect on ClC-0, ClC-1, ClC-3, ClC-4, CFTR, GABAC, Xenopus ClCa, Shaker B or Kv1.2 channels. Structurally, GaTx2 is composed of two beta-strands and one alpha-helix. This peptide is also called Leiuropeptide II. Bears 89, 93 and 96% identity with OdK1, neurotoxin PO1 and leiuropeptide III, respectively.