Inhibits insect potassium channel. Is at least a 100-fold more potent against the Drosophila Shaker channel than towards its mammalian homologs Kv1.1/KCNA1 and Kv1.3/KCNA3. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). Mammalian potassium channels (Kv2.1/KCNB1, Kir1.1/KCNJ1, Kv3.4/KCNC4, Kv4.2/KCND2, Kv7.1/KCNQ1, Kv7.2/KCNQ2, Kv7.3/KCNQ3 and Kv11.1/KCNH2) are even less affected by this toxin (PubMed:17490656). Also weakly inhibits Kv11.1/KCNH2/ERG1, Kv1.2/KCNA2 and Nav1.7/SCN9A channels (PubMed:29483648). Belongs to the short scorpion toxin superfamily. Potassium channel inhibitor family. Alpha-KTx 03 subfamily.