Biological ActivityJingzhaotoxin III is a selective blocker of NaV1.5 channels (IC50 = 348 nM); displays no effect on other isoforms, including NaV1.2, NaV1.4, NaV1.6 and NaV1.7. Thought to inhibit sodium channel activation by binding to the NaV1.5 S3-S4 linker of domain II. Selectively inhibits the activation of cardiac sodium channels, but has no effect on sodium channels in dorsal root ganglion neurons.
(Modifications: Disulfide bridges: 4-19, 11-24, 18-31)
The technical data provided above is for guidance only.
For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.
Jingzhaotoxin-III, a novel spider toxin inhibiting activation of sodium channel in rat cardiac myocytes.
Xiao et al.
Molecular basis of the tarantula toxin jingzhaotoxin-III (β-TRTX-Cj1α) interacting with voltage sensors in sodium channel subtype Nav1.5.
Rong et al.
FASEB J., 2011;25:3177
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