Blocker of A-type voltage-gated potassium channels of cerebellar granular cells. May also inhibit Kv4/KCND when coexpressed with DPP6 or DPP10. The occlusion of the outer entry of the K(+) conducting pore is partially reversible and affects both open and closed channels. It shares the same target in rat brain than BmTX3 (AC Q8I0L5) and AmmTX3 (AC P60208). Also shows a weak inhibition on Kv1.2/KCNA2 and Kv1.3/KCNA3 voltage-gated potassium channels (PubMed:29483648). 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 15 subfamily.