Cat. No. 4718
Biological ActivitySelective NaV1.7 channel blocker. Preferentially inhibits neuronal NaV1.7, 1.2 and 1.3 (IC50 values are 26, 150 and 338 nM respectively), compared to muscle subtypes NaV1.4 and 1.5 (IC50 = >10 μM). Inhibits the channel by binding at the neurotoxin receptor site 4 in the S3-S4 linker of domain II, trapping the voltage sensor in the inward, closed configuration.
(Modifications: Disulfide bridge: 2-17,9-24,16-31)
(Modifications: Ile-35 = C-terminal amide)
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.
Certificate of Analysis / Product Datasheet / Safety Data Sheet
Xiao et al (2011) Common molecular determinants of tarantula huwentoxin-IV inhibition of Na+ channel voltage sensors in domains II and IV. J.Biol.Chem. 286 27301. PMID: 21659528.
Xiao et al (2008) Tarantula huwentoxin-IV inhibits neuronal sodium channels by binding to receptor site 4 and trapping the domain II voltage sensor in the closed configuration. J.Biol.Chem. 283 27300. PMID: 18628201.
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Keywords: Huwentoxin IV, supplier, Huwentoxin, 4, sodium, channels, NaV1.7, blockers, antagonists, toxins, voltage, gated, Na+, channels, selective, Tocris Bioscience, Voltage-gated Sodium (NaV) Channel Blocker products