Morphiceptin

Morphiceptin is a tetrapeptide (Tyr-Pro-Phe-Pro-NH2) that is a selective μ-opioid receptor agonist. It is derived from β-casomorphin and has over 1,000 times selectivity for μ- over δ-opioid receptors. When injected intracerebroventricularly (into the ventricular system of the brain), morphiceptin had an analgesic ED50 of 1.7 nmol per animal. The analgesic effects of morphiceptin were reversed by naloxone, meaning that the analgesic effect is mediated by the μ-opioid receptor.[2]

Morphiceptin
Names
IUPAC name
(2S)-1-[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]-N-[(2S)-1-[(2S)-2-carbamoylpyrrolidin-1-yl]-1-oxo-3-phenylpropan-2-yl]pyrrolidine-2-carboxamide[1]
Other names
Tyr-Pro-Phe-Pro-NH2, PLO17
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
UNII
InChI
  • InChI=1S/C28H35N5O5/c29-21(16-19-10-12-20(34)13-11-19)27(37)33-15-5-9-24(33)26(36)31-22(17-18-6-2-1-3-7-18)28(38)32-14-4-8-23(32)25(30)35/h1-3,6-7,10-13,21-24,34H,4-5,8-9,14-17,29H2,(H2,30,35)(H,31,36)/t21-,22-,23-,24-/m0/s1 N
    Key: LSQXZIUREIDSHZ-ZJZGAYNASA-N N
  • InChI=1/C28H35N5O5/c29-21(16-19-10-12-20(34)13-11-19)27(37)33-15-5-9-24(33)26(36)31-22(17-18-6-2-1-3-7-18)28(38)32-14-4-8-23(32)25(30)35/h1-3,6-7,10-13,21-24,34H,4-5,8-9,14-17,29H2,(H2,30,35)(H,31,36)/t21-,22-,23-,24-/m0/s1
    Key: LSQXZIUREIDSHZ-ZJZGAYNABZ
SMILES
  • c1ccc(cc1)C[C@@H](C(=O)N2CCC[C@H]2C(=O)N)NC(=O)[C@@H]3CCCN3C(=O)[C@H](Cc4ccc(cc4)O)N
Properties
Chemical formula
 C28H35N5O5
Molar mass 521.6 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Morphiceptin is the (1S,2S,3S,4S)-form whereas deproceptin is the (1S,2S,3S,4R)-form [84799-23-5].

See also

References
  1. "Morphiceptin". ChemBase. Archived from the original on 15 March 2012. Retrieved 1 August 2011.
  2. Chang, K (3 May 1982). "Analgesic activity of intracerebroventricular administration of morphiceptin and β-casomorphins: Correlation with the morphine (μ) receptor binding affinity". Life Sciences. 30 (18): 1547–1551. doi:10.1016/0024-3205(82)90242-9. PMID 6281604.


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