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Solution structure of casokefamide

V Brantl1, D Picone, P Amodeo

  • 1Pharma Bissendorf Peptide GmbH, Hannover, Germany.

Biochemical and Biophysical Research Communications
|March 31, 1993
PubMed
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This study explored the structure of casokefamide, a synthetic peptide. Its unique conformation may explain its interaction with opioid receptors and effects on digestion.

Area of Science:

  • Biochemistry
  • Peptide Chemistry
  • Pharmacology

Background:

  • Casokefamide is a synthetic peptide derived from beta-casomorphin.
  • It exhibits resistance to gastric proteases and binds to mu and delta-opioid receptors.
  • Casokefamide influences gastric acid, pancreatic exocrine secretions, and gastrointestinal motility.

Purpose of the Study:

  • To investigate the conformational properties of casokefamide.
  • To understand the relationship between its structure and function, particularly its opioid receptor interactions.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy in a DMSOd6/H2O cryomixture at 265 K.
  • Computational energy calculations.

Main Results:

Related Experiment Videos

  • The predominant conformation of casokefamide lacks regular secondary structures and intramolecular hydrogen bonds.
  • The conformation of the 'message domain' resembles that of various peptidic and non-peptidic opiates.
  • The D-Ala2CH3 group is positioned between the Tyr1 and Phe3 aromatic rings.

Conclusions:

  • The study elucidates the solution conformation of casokefamide.
  • The determined structure provides insights into its opioid receptor binding and physiological effects.
  • This conformational data is crucial for understanding casokefamide's pharmacological profile.