GpTx-1

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GpTx-1 is a peptide-based Na_V1.7 sodium channel antagonist isolated from the venom of the Chilean spider Grammostola porter. GpTx-1 demonstrates potent inhibitory activity against the Na_V1.7 channel with an IC₅₀ value of 10 nM, while exhibiting excellent selectivity for Na_V1.4 (IC₅₀ = 0.301 μM) and Na_V1.5 (IC₅₀ = 4.20 μM), showing >20-fold and >950-fold selectivity respectively.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

GpTx-1 Chemical Structure

CAS No. : 1661050-12-9

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Other Forms of GpTx-1:

GpTx-1 TFA Get quote

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•Related Small Molecules:

•Related Proteins:

View All Sodium Channel Isoform Specific Products:

View All Isoforms

Na_v1.1 Na_v1.2 Na_v1.3 Na_v1.4 Na_v1.5 Na_v1.6 Na_v1.7 Na_v1.8

Biological Activity
Purity & Documentation
References
Customer Review

Description

IC₅₀ & Target^[1]

Na_v1.3

0.0203 μM (IC₅₀)

Na_v1.4

0.301 μM (IC₅₀)

Na_v1.5

4.20 μM (IC₅₀)

Na_v1.7

10 nM (IC₅₀)

Na_v1.8

12.2 μM (IC₅₀)

Molecular Weight

4073.82

Formula

C₁₇₆H₂₇₁N₅₃O₄₅S₇

CAS No.

1661050-12-9

Sequence

Asp-Cys-Leu-Gly-Phe-Met-Arg-Lys-Cys-Ile-Pro-Asp-Asn-Asp-Lys-Cys-Cys-Arg-Pro-Asn-Leu-Val-Cys-Ser-Arg-Thr-His-Lys-Trp-Cys-Lys-Tyr-Val-Phe-NH2 (Disulfide bridge: Cys2-Cys17;Cys9-Cys23;Cys16-Cys30)

Sequence Shortening

DCLGFMRKCIPDNDKCCRPNLVCSRTHKWCKYVF-NH2 (Disulfide bridge: Cys2-Cys17;Cys9-Cys23;Cys16-Cys30)

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

Please store the product under the recommended conditions in the Certificate of Analysis.

Purity & Documentation

Handling Instructions (2659 KB)

References

[1]. Murray JK, et al. Engineering potent and selective analogues of GpTx-1, a tarantula venom peptide antagonist of the Na(V)1.7 sodium channel. J Med Chem. 2015 Mar 12;58(5):2299-314. [Content Brief]

GpTx-1 Related Classifications

Neurological Disease

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The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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The dilution calculator equation

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

Concentration _(start)	×	Volume _(start)	=	Concentration _(final)	×	Volume _(final)
	×		=		×
C1		V1		C2		V2

Help & FAQs

Do most proteins show cross-species activity?
Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

GpTx-11661050-12-9GpTx1GpTx 1Sodium ChannelNa channelsNa+ channelsGrammostola porteriInhibitorinhibitorinhibit

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