ProTx I

Cat. No. 4665

ProTx I Glu-Cys-Arg-Tyr-Trp-Leu-Gly-Gly-Cys-Ser-Ala-Gly-Gln-Thr-Cys-Cys-Lys-His-Leu-Val-Cys-Ser-Arg-Arg-His-Gly-Trp-Cys-Val-Trp-Asp-Gly-Thr-Phe-Ser

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Biological Activity

Selective CaV3.1 channel blocker (IC50 values are 0.2 and 31.8 μM for hCaV3.1 and hCaV3.2 respectively). Also reversibly inhibits NaV1.8 and blocks KV2.1 channels.

Technical Data


(Modifications: Disulfide bridge: 2-16, 9-21, 15-28)

Soluble to 2 mg/ml in water
Store at -20°C

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 / Safety Data Sheet

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Safety Data Sheet: View Safety Data Sheet

Ohkubo and Yamazaki (2012) T-type voltage-activated calcium channel Cav3.1, but not Cav3.2, is involved in the inhibition of proliferation and apoptosis in MCF-7 human breast cancer cells. Int.J.Oncol. 41 267. PMID: 22469755.

Ohkubo et al (2010) Tarantula toxin ProTx-I differentiates between human T-type voltage-gated Ca2+ channels Cav3.1 and Cav3.2. J.Pharmacol.Sci. 112 452. PMID: 20351484.

Middleton et al (2002) Two tarantula peptides inhibit activation of multiple sodium channels. Biochemistry 41 14734. PMID: 12475222.

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View Related Products by Product Action

Keywords: ProTx I, supplier, ProTxI, calcium, sodium, potassium, ion, channels, NaV1.8, CaV3.1, CaV3.2, KV2.1, selective, blockers, Tocris Bioscience, Voltage-gated Calcium Channel (CaV) Blocker products

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