Ureido group containing cyclic dermorphin(1-7) analogues: synthesis, biology and conformation
2007 (English)In: Journal of Peptide Science, ISSN 1075-2617, E-ISSN 1099-1387, Vol. 13, no 8, 519-528 p.Article in journal (Refereed) Published
Six cyclic peptides related to dermorphin(1-7) have been synthesized. The synthesis of linear peptides containing diamino acid residues in positions 2 and 4 was carried out on a 4-methylbenzhydrylamine resin, and cyclization was achieved by treatment with bis-(4-nitrophenyl)carbonate to form a urea unit. The peptides were tested in the guinea-pig ileum (GPI) and mouse vas deferens (MVD) assays. Diverse opioid agonist activities were observed, depending on the size of the ring. The results were compared with those obtained earlier for 1-4 dermorphin analogues. The conformations of all six dermorphin analogues were studied. The conformational space of the peptides was examined using the electrostatically driven Monte Carlo method. On the basis of NMR data, an ensemble of conformations was obtained for each peptide. The opioid activity profiles of the compounds are discussed in the light of the structural data.
Place, publisher, year, edition, pages
2007. Vol. 13, no 8, 519-528 p.
cyclic opioid peptides, conformation, dermorphin analogues, EDMC, NMR, SAR
Biochemistry and Molecular Biology
IdentifiersURN: urn:nbn:se:su:diva-55902DOI: 10.1002/psc.877ISI: 000249134500004OAI: oai:DiVA.org:su-55902DiVA: diva2:409562
authorCount :92011-04-082011-03-302011-04-08Bibliographically approved