Cardiovascular · Amidated proadrenomedullin-derived regulatory peptide
Proadrenomedullin N-terminal 20 peptide (PAMP)
Also known as PAMP; PAMP-20
An amidated 20-residue proadrenomedullin fragment studied in secretion, receptor signalling and microbial assays.
- Length
- 20 amino acids
- Half-life
- Not well characterised
- Mechanism
- PAMP displays context-dependent signalling, with MRGPRX2 activation reported in receptor-expression assays. It is also studied for modulation of catecholamine secretion, but a single receptor mechanism does not account for all reported experimental effects.
- Studied in
- Chromaffin cell cultures, recombinant receptor assays, endothelial models and microbial growth assays investigate PAMP signalling, secretion biology and membrane-associated activity.
About Proadrenomedullin N-terminal 20 peptide (PAMP)
PAMP is produced from the N-terminal region of proadrenomedullin, the same precursor that also yields adrenomedullin. It was identified through investigation of precursor processing rather than as a shortened form of mature adrenomedullin. The human PAMP-20 sequence is ARLDVASEFRKKWNKWALSR, with an amidated C-terminal arginine. Unlike adrenomedullin, PAMP contains no cysteine residues and therefore lacks a disulphide ring. These structural differences are important when comparing the two products experimentally.
PAMP research spans neuroendocrine secretion, vascular cell behaviour and antimicrobial assays, but these settings should not be assumed to share one molecular mechanism. MRGPRX2 has been identified as a responsive receptor in experimental systems, while other reported activities have less firmly established receptor attribution. The peptide's basic residues also motivate studies of membrane interactions. Assays should distinguish full-length amidated PAMP-20 from shorter precursor-derived fragments, because sequence length and terminal chemistry can change the measured activity.
Laboratory notes
- For research use only; confirm C-terminal amidation and distinguish PAMP-20 from truncated PAMP fragments in analytical records.
- Control ionic strength and protein content in microbial or membrane assays, as these conditions can influence the behaviour of cationic peptides.
- For MRGPRX2 studies, include receptor-negative cells and verify receptor expression rather than assuming all PAMP responses use this target.
Storage and reconstitution basics: storage guide.
Questions about Proadrenomedullin N-terminal 20 peptide (PAMP)
Is PAMP a fragment of mature adrenomedullin?
No. PAMP and adrenomedullin arise from separate regions of the same precursor protein.
Does PAMP have the same receptor assignment as adrenomedullin?
That should not be assumed. Adrenomedullin is characterised at CLR–RAMP receptor complexes, whereas PAMP has distinct and less completely resolved receptor pharmacology.
Which structural features should a PAMP-20 specification include?
The species sequence, 20-residue length and C-terminal amidation should be specified; the human sequence contains no cysteines or disulphide bonds.
Is Proadrenomedullin N-terminal 20 peptide (PAMP) for human use?
No. It is supplied strictly for in-vitro laboratory research and is not for human or animal consumption.
Related research peptides
All products are sold for laboratory research use only. Not for human consumption, not a medicine, not for diagnosing, treating or preventing any condition.