Blocker of potassium channels, which inhibits both the delayed rectifier and fast transient potassium current. The inhibition is reversible and voltage-independent. It causes a depolarizing shift of the steady-state activation curve of the currents, without changing their steady-state inactivation behavior. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to a beta-sheet by disulfide bonds (CSalpha/beta). Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 17 subfamily.