Delta-actitoxin-Avd2a

UniProtKB accession:  P01535

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Specific arthropod (crab and insect) toxin that inhibits inactivation of voltage-gated sodium channels. It competes well with the site-3 toxin LqhalphaIT (from the scorpion L.quinquestriatus (AC P17728)) on binding to cockroach neuronal membranes (Ki=21.4 nM), and inhibits the inactivation of D.melanogaster channel (DmNav1), but not that of mammalian Navs expressed in Xenopus oocytes. Its activity is synergically enhanced by ligands of receptor site-4 (Bj-xtrIT (AC P56637)). Its ability to inhibit the channel mutant DmNav1[D1701R] only decreases 5-fold, whereas the inhibition activity is completely lost by LqhalphaIT and Av2 when tested on DmNav1[D1701R].