Evidence 1
Activity
Activity
Neurotoxin
FUNCTION: Potent voltage-gated sodium channel blocker (IC(50)=190 nM and 210 nM on human and rat Nav1.3/SCN3A respectively, 430 nM on human Nav1.7/SCN9A, 770 nM and 290 nM on human and rat Nav1.8/SCN10A, respectively) (By similarity). Binds the voltage-sensor domain of the potassium channel KvAP (from Aeropyrum pernix) and weakly inhibits this channel (PubMed:15287735). {ECO:0000250|UniProtKB:P0DL74, ECO:0000269|PubMed:15287735}.
Target
voltage-gated sodium channel (Nav)
voltage-gated potassium channel (Kv)
Source & Reference
NA
UniProtKB/Swiss-Prot Tox-Prot
Other
Grammostola rosea (Chilean rose tarantula) (Grammostola spatulata)
Neurotoxin
Ion channel impairing toxin
Potassium channel impairing toxin
Potent voltage-gated sodium channel blocker (IC(50)=190 nM and 210 nM on human and rat Nav1.3/SCN3A respectively, 430 nM on human Nav1.7/SCN9A, 770 nM and 290 nM on human and rat Nav1.8/SCN10A, respectively) (By similarity). Binds the voltage-sensor domain of the potassium channel KvAP (from Aeropyrum pernix) and weakly inhibits this channel (PubMed:15287735)..
Voltage sensor toxin 3 (VSTX3) (Beta/kappa-theraphotoxin-Gr4a) (Beta/kappa-TRTX-Gr4a)
spider
Neurotoxin 10 (Hwtx-1) family, 61 (VSTX3) subfamily
Evidence at protein level
Direct protein sequencing
Disulfide bond
Ion channel impairing toxin
Knottin
Neurotoxin
Potassium channel impairing toxin
Secreted
Toxin
TISSUE SPECIFICITY: Expressed by the venom gland. {ECO:0000305|PubMed:15287735}.