title: Isolation and characterization of ovokinin, a bradykinin B1 agonist peptide derived from ovalbumin.
abstract: A vasorelaxing peptide was purified from a peptic digest of ovalbumin, after three steps of reverse-phase HPLC. The structure of the peptide was Phe-Arg-Ala-Asp-His-Pro-Phe-Leu, which corresponded to residues 358-365 of ovalbumin. The peptide was named ovokinin. Ovokinin showed relaxing activity for a canine mesenteric artery (EC50 = 6.3 microM). The relaxing activity was blocked by the bradykinin B1 antagonist [des-Arg9] [Leu8]bradykinin, but not by the B2 antagonist Hoe 140. Ovokinin binds to B1 receptors (IC50 = 64 microM). Prostaglandin I2 was released from the artery after ovokinin stimulation as a relaxing factor. Thus, ovokinin is a weak bradykinin B1 agonist peptide derived from food proteins.
mesh_terms: D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D001920:Bradykinin / Q000819:agonists* / Q000037:antagonists & inhibitors; D015237:Dinoprost / Q000494:pharmacology; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D004527:Egg Proteins / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D066298:In Vitro Techniques; D008638:Mesenteric Arteries / Q000187:drug effects / Q000502:physiology*; D008969:Molecular Sequence Data; D009126:Muscle Relaxation / Q000187:drug effects*; D009131:Muscle, Smooth, Vascular / Q000187:drug effects / Q000502:physiology*; D010047:Ovalbumin / Q000737:chemistry*; D010208:Papaverine / Q000494:pharmacology; D010446:Peptide Fragments / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D010726:Phosphodiesterase Inhibitors / Q000494:pharmacology; D011688:Purinones / Q000494:pharmacology; D011760:Pyrrolidinones / Q000494:pharmacology; D020889:Rolipram; D014665:Vasodilator Agents / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D004527:Egg Proteins; D010446:Peptide Fragments; D010726:Phosphodiesterase Inhibitors; D011688:Purinones; D011760:Pyrrolidinones; D014665:Vasodilator Agents; C096585:ovokinin; D010047:Ovalbumin; D015237:Dinoprost; D010208:Papaverine; C011145:zaprinast; D020889:Rolipram; D001920:Bradykinin; D015056:1-Methyl-3-isobutylxanthine