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  • Title: Structure-activity study of intact porcine motilin.
    Author: Haramura M, Tsuzuki K, Okamachi A, Yogo K, Ikuta M, Kozono T, Takanashi H, Murayama E.
    Journal: Chem Pharm Bull (Tokyo); 1999 Nov; 47(11):1555-9. PubMed ID: 10605054.
    Abstract:
    Biologically important sites on intact porcine motilin (pMTL) were explored using its partial peptides. The partial peptides were synthesized using Fmoc (9-fluorenylmethyloxycarbonyl) solid phase methodology, and tested for the binding activity to motilin receptor and the smooth muscle contractile activity. The results were as follows: important residues for the contractile activity were found to be Phe1, Ile4, and Tyr7, and an open space existed beyond the N-terminus between motilin and its receptor. On the model of interaction between motilin and motilin receptor evolved from these results, the three points of interaction, due to Phe1, Ile4, and Tyr7, and the presence of an open space were expected. The motilin agonist and antagonist, designed on this model, will help the inquiry into motilin associated diseases.
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