Other · Secretogranin II-derived secretory peptide
Secretoneurin
Also known as SN
A 33-residue secretogranin II fragment studied in neurotransmitter-release, leucocyte-migration and endothelial assays.
- Length
- 33 amino acids
- Half-life
- Not well characterised
- Mechanism
- Secretoneurin produces chemotactic and intracellular signalling responses in selected neuronal, immune and endothelial preparations. G-protein-linked signalling has been implicated in some systems, but a specific molecular receptor has not been conclusively identified.
- Studied in
- Brain-slice preparations, leucocyte migration assays and endothelial cell models are used to investigate secretoneurin-associated neurotransmitter release, chemotaxis and vascular signalling.
About Secretoneurin
Secretoneurin is a 33-amino-acid peptide generated by proteolytic processing of secretogranin II, a member of the granin family encoded by SCG2. It was characterised in the early 1990s, with initial functional work examining dopamine release from striatal preparations. The peptide occupies a conserved region of its precursor bounded by basic processing sites. Secretogranin II resides in dense-core secretory granules, linking secretoneurin production to regulated secretory pathways in neuronal and neuroendocrine cells.
Beyond neurotransmitter-release experiments, secretoneurin is investigated in leucocyte chemotaxis and endothelial cell assays. Reported responses include cell migration and activation of signalling pathways such as MAPK and PI3K/Akt in particular preparations. These observations do not establish a unique receptor, and interactions with broader signalling networks may vary by cell type. Research interpretation should distinguish the isolated peptide from intact secretogranin II and other precursor fragments, especially when immunological methods target sequences shared among them.
Laboratory notes
- Confirm the species-specific 33-residue sequence and expected mass; precursor numbering can differ between sequence records and species.
- In chemotaxis experiments, use gradient controls to distinguish directed migration from increased random motility.
- For immune-cell and endothelial assays, document endotoxin levels and verify that detection methods distinguish secretoneurin from secretogranin II-derived material.
Storage and reconstitution basics: storage guide.
Questions about Secretoneurin
Is secretoneurin the same as secretogranin II?
No. Secretoneurin is a 33-residue processing product, while secretogranin II is the much larger granin-family precursor encoded by SCG2.
Has a secretoneurin receptor been identified?
A specific molecular receptor has not been conclusively established. Functional evidence for G-protein involvement in some systems should not be presented as a definitive receptor assignment.
Why are gradient controls important in secretoneurin migration assays?
They help separate chemotaxis, which is directional movement along a gradient, from chemokinesis, which is increased movement without directional preference. These materials are for research use only.
Is Secretoneurin for human use?
No. It is supplied strictly for in-vitro laboratory research and is not for human or animal consumption.
Related research peptides
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