Mu-conotoxin: Disulfide-Rich Research Peptide from Cone Snail Venom
Mu-conotoxin (CAS 936616-33-0) is a 22-amino acid peptide derived from the venom of marine cone snails (genus Conus). The peptide contains three disulfide bridges that constrain the molecule into a rigid, compact fold essential for its biological activity: selective blockade of voltage-gated sodium channels (Nav). This is a research-grade peptide with niche applications in neuroscience-inspired cosmetic concept development. TCS NEXUS S.L. supplies synthetic Mu-conotoxin at HPLC purity above 95% from our warehouse in Valencia, Spain.
Mechanism: Voltage-Gated Sodium Channel Blockade
Mu-conotoxins target the pore region of voltage-gated sodium channels (Nav1.1 through Nav1.9), physically occluding ion flow through the selectivity filter. The mechanism differs fundamentally from botulinum-type neuromodulators (which act presynaptically on SNARE proteins) and from snake venom-mimetic peptides like SYN-AKE (which target nicotinic acetylcholine receptors). Sodium channel blockade prevents action potential propagation along nerve fibers, producing a localized reduction in neural signaling.
The three disulfide bonds (Cys3-Cys15, Cys4-Cys20, Cys10-Cys21) create the inhibitor cystine knot (ICK) motif that is characteristic of conotoxin peptides. This fold provides exceptional proteolytic stability — the peptide resists degradation by trypsin, chymotrypsin, and pepsin, with a half-life exceeding 24 hours in simulated biological fluids. The full sequence is Pyr-Gly-Cys-Cys-Asn-Gly-Pro-Lys-Gly-Cys-Ser-Ser-Lys-Trp-Cys-Arg-Asp-His-Ala-Arg-Cys-Cys-CONH2.
Cosmetic Concept Applications
Mu-conotoxin is not a mainstream cosmetic ingredient. It occupies an extreme niche in advanced neuro-relaxation concepts explored by innovation teams in luxury and prestige skincare. The scientific rationale is that sodium channel inhibition could reduce sensory nerve firing in the dermis, theoretically dampening the neuromuscular signaling cascade involved in dynamic wrinkle formation. This mechanism is complementary to — not a replacement for — established neuromodulatory peptides.
Practical challenges include the molecular weight (approximately 2.4 kDa for the oxidized form), which limits passive diffusion through intact stratum corneum. Delivery strategies under investigation include iontophoresis, microneedle patches, and lipid nanoparticle encapsulation. At this stage, Mu-conotoxin serves primarily as a tool compound for in vitro mechanistic studies and proof-of-concept formulation work.
Handling and Storage
Store Mu-conotoxin lyophilized at -20 degrees C, protected from moisture and light. Reconstitute in sterile water or phosphate-buffered saline at pH 7.0-7.4 immediately before use. Working solutions should be used within 24 hours. The disulfide bonds are stable under mildly acidic to neutral conditions but are reduced by DTT and beta-mercaptoethanol — avoid reducing agents during formulation.
For research applications, typical concentrations range from 1-100 micromolar in cell-based sodium channel assays. Electrophysiology (patch clamp) experiments typically use 0.1-10 micromolar. Handle with standard laboratory safety precautions appropriate for bioactive peptides.
Research Supply
TCS NEXUS S.L. supplies Mu-conotoxin from Valencia, Spain. EU delivery in 5-7 business days. Certificate of Analysis includes HPLC purity, mass spectrometry confirmation, amino acid analysis, and disulfide mapping. Available in research quantities (1-100 mg). Contact our peptide chemistry team for custom synthesis and technical consultation.
Technical Support and Samples
Request COA documents, sample availability, or support for custom synthesis.
Frequently Asked Questions
Do you provide COA documents for Mu-conotoxin Supplier Europe?
Yes. Each lot can be supplied with a Certificate of Analysis, HPLC purity data, and relevant quality-control results for technical review.
Are samples available for Mu-conotoxin Supplier Europe?
Yes. Sample availability can be confirmed for formulation screening and internal evaluation before a commercial order is placed.
What is the delivery lead time for Mu-conotoxin Supplier Europe?
For stocked material in Valencia, EU delivery is typically 5 to 7 business days. Final timing depends on destination and requested volume.
Do you also support custom synthesis and technical inquiries?
Yes. The team can help with custom synthesis, raw-material selection, technical documentation, and supply planning.