SNAP-8 (200mg) Research Peptide: A Competitive SNARE Complex Inhibitor for Neuromuscular & Dermal Studies

If your research investigates synaptic vesicle fusion, SNARE complex dynamics, or the molecular mechanisms of neuromuscular modulation, SNAP-8 (200mg) research peptide — also known as Acetyl Octapeptide-3 or Acetyl Glutamyl Heptapeptide-1 — offers a precisely defined synthetic tool for competitive inhibition studies.

SNAP‑8 is a synthetic octapeptide that mimics the N‑terminal domain of SNAP‑25 (Synaptosomal‑Associated Protein of 25 kDa), a core component of the SNARE complex responsible for synaptic vesicle docking and fusion. By competitively binding to syntaxin and synaptobrevin — occupying the sites normally reserved for the N‑terminal domain of SNAP‑25 — it sterically hinders the formation of a functional SNARE complex, thereby modulating neurotransmitter release without permanently blocking it. This makes SNAP-8 (200mg) research peptide a valuable tool for laboratories investigating exocytosis dynamics, protein‑protein interactions, and the molecular basis of acetylcholine‑mediated signalling.

At Chinese Grey Peptides, we supply high‑purity SNAP‑8 (200mg) research peptide to research institutions and wholesale buyers across the United Kingdom, France, Germany, Spain, Sweden, Italy, and the USA. Every batch is lyophilised, HPLC‑verified to ≥98% purity, and accompanied by a Certificate of Analysis (COA), ensuring your investigations into vesicle fusion dynamics, SNARE complex biology, and neuromuscular signalling begin with uncompromising quality.

What Is SNAP-8 and How Does It Work?

To fully appreciate the research potential of SNAP-8 (200mg) research peptide, it is essential to understand its biochemical design and the precise mechanism by which it modulates SNARE‑mediated exocytosis.

The Acetylated Octapeptide

SNAP‑8 is a synthetic acetylated octapeptide with the sequence Ac‑Glu‑Glu‑Met‑Gln‑Arg‑Arg‑Ala‑Asp‑NH₂ (Ac‑EEMQRRAD‑NH₂). Its molecular formula is C₄₁H₇₀N₁₆O₁₆S, and its molecular weight is approximately 1075.16 g/mol. It has a CAS number of 868844‑74‑0.

The peptide is an extended form of Acetyl Hexapeptide‑8 (Argireline®), with two additional C‑terminal residues — alanine and aspartic acid — that enhance its binding efficiency at the SNARE complex. The N‑terminal acetylation and C‑terminal amidation enhance stability and help the peptide mimic native protein conformations.

Mechanism of Action: Competitive Inhibition of SNARE Complex Assembly

The biological activity of SNAP-8 (200mg) research peptide is rooted in its ability to disrupt a specific protein‑protein interaction:

SNARE Complex Formation: The SNARE complex is a four‑helical bundle essential for synaptic vesicle docking and fusion. It comprises synaptobrevin (VAMP) on the vesicle membrane, syntaxin‑1 on the presynaptic membrane, and SNAP‑25 (which contributes two α‑helices) bridging the other proteins. Under normal conditions, these three proteins assemble in a coiled‑coil configuration that drives vesicle fusion and neurotransmitter release.

Competitive Binding: SNAP‑8 mimics the N‑terminal domain of SNAP‑25 (residues 1‑8) and competes with native SNAP‑25 for binding sites on syntaxin and synaptobrevin. It occupies the sites normally reserved for the N‑terminal domain of SNAP‑25, sterically hindering the formation of a functional SNARE complex.

Modulation of Neurotransmitter Release: By disrupting SNARE complex assembly, SNAP‑8 reduces the efficiency of vesicle fusion, leading to reduced neurotransmitter release at the neuromuscular junction. This effect is reversible, distinguishing it from botulinum toxin, which irreversibly cleaves SNARE proteins.

Binding Affinity and Selectivity

Biophysical studies reveal that SNAP‑8 mimics the N‑terminal sequence of SNAP‑25 (residues 1‑8), allowing it to bind syntaxin with high affinity (Kd ≈ 0.8 µM). This relatively strong binding, combined with the peptide’s stability and selective mechanism of action, makes SNAP‑8 a highly attractive tool for research models where controlled, reversible modulation of SNARE‑mediated exocytosis is desired.

Key Research Applications for SNAP-8 (200mg)

SNAP-8 (200mg) research peptide is a versatile tool with applications spanning several areas of biomedical and formulation science.

1. SNARE Complex & Vesicle Fusion Dynamics

The most fundamental application of SNAP‑8 lies in its ability to serve as a molecular probe for studying the SNARE complex itself. The SNARE machinery is central to nearly all vesicle‑mediated processes, yet its complexity makes it difficult to examine individual regions without substantial structural manipulation. SNAP‑8 offers researchers a simplified, controlled tool to investigate how specific motifs within SNAP‑25 contribute to SNARE complex assembly and stabilisation, calcium‑dependent conformational shifts involved in vesicle priming, the kinetics of vesicle docking and fusion under varying conditions, and the competitive dynamics between native SNAP‑25 and peptide mimics.

By providing a well‑defined, stable mimic of a critical SNARE interaction domain, SNAP‑8 allows researchers to isolate and study motif‑level events that are otherwise difficult to observe.

2. Neuromuscular Junction & Neurotransmitter Release Models

The neuromuscular junction is a well‑characterised model system for studying exocytosis and synaptic transmission. SNAP‑8’s ability to reduce neurotransmitter release in a reversible, dose‑dependent manner makes it a valuable tool for modelling conditions of reduced neuromuscular transmission, investigating the relationship between neurotransmitter release intensity and downstream physiological outcomes, studying the reversibility and recovery of SNARE‑mediated release after peptide exposure, and exploring the competitive dynamics between SNAP‑25 and peptide mimics.

Because SNAP‑8 acts downstream of calcium influx but upstream of vesicle fusion, it targets a distinct point in the exocytosis pathway, complementing other research tools that act at different stages.

3. SNARE‑Based Therapeutic Research

SNAP‑8 is widely studied as a non‑invasive, topical alternative to botulinum toxin. Research applications include comparative efficacy studies with other SNARE inhibitors, combination studies exploring synergistic effects with other peptides (such as Leuphasyl or Matrixyl), and delivery system research studying the skin permeation of SNAP‑8 using microneedle patches, iontophoresis, and other transdermal delivery technologies.

4. Protein‑Protein Interaction & Molecular Recognition Studies

Beyond its specific role in SNARE biology, SNAP‑8 serves as a model system for studying protein‑peptide interactions. Research applications include investigating how short peptide fragments retain or modify the binding specificity of full‑length proteins, studying the structural requirements for high‑affinity binding between SNARE motifs, developing and validating computational models of protein‑peptide interactions, and exploring the relationship between peptide sequence, conformation, and binding affinity.

5. Formulation & Transdermal Delivery Research

SNAP‑8 is incorporated into various topical vehicles, including creams, serums, and patches, to study formulation variables affecting peptide stability, skin penetration, and bioavailability. Research applications include skin permeation studies investigating passive and iontophoretic permeation through excised human skin, microneedle delivery studies exploring the utility of solid microneedle arrays in enhancing transdermal delivery, and nanoformulation studies exploring the use of nanostructured lipid carriers for SNAP‑8 delivery.

Chemical & Physical Specifications for SNAP-8 (200mg)

Accurate characterisation of SNAP-8 (200mg) research peptide is essential for reproducible experimental design.

Note: The 200 mg mass refers to the weight of the peptide in its lyophilised form. SNAP‑8 is typically supplied as a TFA salt, which enhances aqueous solubility. The peptide is also known by INCI name Acetyl Glutamyl Heptapeptide‑1.

Reconstitution & Handling Protocol for SNAP-8 (200mg)

Proper reconstitution of SNAP-8 (200mg) research peptide is critical for maintaining its structural integrity and biological activity.

Step 1 – Preparation

• Bring the sealed SNAP‑8 vial and your chosen diluent (sterile bacteriostatic water or sterile PBS, pH 5‑7) to room temperature. Condensation can degrade the lyophilised powder.

• Clean your work surface with 70% ethanol and lay out sterile syringes, alcohol wipes and a clean work mat.

Step 2 – Vial Sanitisation

• Wipe the rubber stopper of the SNAP‑8 vial with a fresh 70% ethanol wipe. Allow the alcohol to evaporate completely before piercing.

Step 3 – Reconstitution

• Draw your desired volume of diluent into a sterile syringe. A common starting concentration for research applications is 200 mg per 20 mL of diluent, yielding a 10 mg/mL stock solution.

• Insert the needle and slowly inject the diluent against the inner glass wall. Do not spray directly onto the lyophilised powder.

• Gently swirl the vial until the solution is clear and fully dissolved. Do not shake vigorously, as shaking can cause denaturation.

Step 4 – Aliquoting & Storage

• Immediately after dissolution, aliquot the reconstituted SNAP‑8 into single‑use sterile vials.

• Store aliquots at –20°C. Avoid repeated freeze‑thaw cycles, as peptides are susceptible to degradation.

• Once thawed, store at 2‑8°C and use within a short period.

Concentration Reference Table for SNAP-8 (200mg)

Adjust diluent volume based on your experimental requirements. For cell culture applications, typical working concentrations may range from 0.1‑10 µM.

Storage & Stability Guidelines for SNAP-8 (200mg)

Why Choose Chinese Grey Peptides for SNAP-8 (200mg)?

As an authentic licensed peptide supplier based in the USA, we supply SNAP-8 (200mg) research peptide and a wide range of research‑grade compounds under rigorous quality assurance protocols, fully aligned with Google’s E‑E‑A‑T standards (Experience, Expertise, Authoritativeness, Trustworthiness).

• Verified Purity: Independent HPLC analysis with purity guaranteed ≥98% for every batch.

• GMP‑Compliant Manufacturing: All peptides are synthesised under strict quality control conditions.

• Full Traceability: Batch‑specific Certificates of Analysis (COA) are available for every order.

• Wholesale Supply: We serve research institutions, laboratories, and wholesale buyers across the UK, EU, and USA with flexible volume pricing and reliable logistics.

• USA‑Based Regulatory Compliance: All products are supplied strictly as research‑grade chemicals for laboratory use only (RUO). This product is not for human or therapeutic use.

Researchers across the United States—including those at leading institutions—trust us for fast domestic delivery, transparent documentation and professional technical support.

FAQ: SNAP-8 (200mg) Research Peptide

 What is SNAP-8 (200mg) research peptide?
SNAP‑8 (acetyl octapeptide‑3) is a synthetic acetylated octapeptide with the sequence Ac‑Glu‑Glu‑Met‑Gln‑Arg‑Arg‑Ala‑Asp‑NH₂. It is a mimic of the N‑terminal domain of SNAP‑25 and acts as a competitive inhibitor of SNARE complex assembly, modulating neurotransmitter release without permanent blockade.

What is the sequence and molecular weight of SNAP‑8?
The sequence is Ac‑Glu‑Glu‑Met‑Gln‑Arg‑Arg‑Ala‑Asp‑NH₂ (Ac‑EEMQRRAD‑NH₂). Its molecular formula is C₄₁H₇₀N₁₆O₁₆S, and its molecular weight is approximately 1075.16 g/mol.

What are the primary research applications for SNAP‑8?
SNAP‑8 is used in SNARE complex and vesicle fusion dynamics research, neuromuscular junction studies, SNARE‑based therapeutic research (as a topical botulinum toxin alternative), protein‑protein interaction investigations, and formulation and transdermal delivery research.

What is the mechanism of action of SNAP‑8?
SNAP‑8 competitively binds to syntaxin and synaptobrevin, occupying the sites normally reserved for the N‑terminal domain of SNAP‑25. This sterically hinders the formation of a functional SNARE complex, reducing the efficiency of vesicle fusion and neurotransmitter release. The effect is reversible, distinguishing it from botulinum toxin.

How does SNAP‑8 differ from Argireline (Acetyl Hexapeptide‑8)?
SNAP‑8 is an extended form of Argireline, containing two additional C‑terminal amino acids (alanine and aspartic acid) that enhance its stability and binding efficiency at the SNARE complex. Studies suggest SNAP‑8 may be approximately 30% more active than Argireline.

What purity does your SNAP-8 (200mg) meet?
Our SNAP‑8 is tested to ≥98% purity by HPLC. A Certificate of Analysis (COA) is supplied with every order.

 How should I reconstitute SNAP-8 (200mg)?
Reconstitute with sterile bacteriostatic water or sterile PBS (pH 5‑7). Allow the vial to reach room temperature, then slowly inject the diluent against the inner glass wall and swirl gently. Do not shake. A typical starting concentration is 10 mg/mL.

 How should I store reconstituted SNAP‑8?
Reconstituted SNAP‑8 should be stored at 2‑8°C for short‑term use. For longer storage, aliquot immediately into single‑use vials and store at –20°C for up to 3 months. Avoid repeated freeze‑thaw cycles.

 Is SNAP-8 research peptide legal to purchase in the USA?
Yes. SNAP‑8 is a laboratory reagent sold for research use only (RUO). It is fully legal to purchase, possess, and use in the United States for legitimate in‑vitro or in‑vivo scientific research, provided it is not marketed with therapeutic claims.

Q10: Does Chinese Grey Peptides ship internationally?
Yes. We ship across the UK, Europe (France, Germany, Spain, Sweden, Italy), and the USA from our US warehouse. Wholesale pricing is available for bulk orders.

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From its role as a competitive inhibitor of SNARE complex assembly to its applications in studying vesicle fusion dynamics, neuromuscular signalling, and formulation science, SNAP-8 (200mg) research peptide offers a well‑characterised, precisely defined octapeptide platform for advanced molecular and formulation research. Its ability to reversibly modulate neurotransmitter release through a specific, high‑affinity interaction with syntaxin and synaptobrevin — supported by biophysical binding studies (Kd ≈ 0.8 µM) — makes it a valuable addition to any laboratory investigating exocytosis pathways, protein‑protein interactions, or SNARE complex biology.

By choosing high‑purity, lab‑verified SNAP-8 (200mg) research peptide from Chinese Grey Peptides, you ensure that your research is built on a foundation of quality, reproducibility, and scientific integrity.

Ready to advance your research with SNAP-8 (200mg)? Browse our product catalogue, request a wholesale quote, or contact our support team today to discuss your laboratory’s specific needs. Place your order now and receive GMP‑grade SNAP‑8 delivered directly to your facility in the USA, UK, or Europe.