| Literature DB >> 19560919 |
Domenica Torino1, Adriano Mollica, Francesco Pinnen, Gino Lucente, Federica Feliciani, Peg Davis, Josephine Lai, Shou-Wu Ma, Frank Porreca, Victor J Hruby.
Abstract
Six new endomorphin analogues, incorporating constrained amino acids in place of native proline have been synthesized. Residues of (S)-azetidine-2-carboxylic acid (Aze), 3,4-dehydro-(S)-proline (Delta(3)Pro), azetidine-3-carboxylic acid (3Aze) and dehydro-alanine (DeltaAla) have been used to prepare [Delta(3)Pro(2)]EM-2 (1), [Aze(2)]EM-1 (2), [Aze(2)]EM-2 (3), [3Aze(2)]EM-1 (4), [3Aze(2)]EM-2 (5) and [DeltaAla(2)]EM-2 (6). Binding assays and functional bioactivities for mu- and delta-receptors are reported. The highest affinity, bioactivity and selectivity are shown by peptides 2 and 3 containing the Aze residue.Entities:
Mesh:
Substances:
Year: 2009 PMID: 19560919 PMCID: PMC2737817 DOI: 10.1016/j.bmcl.2009.06.008
Source DB: PubMed Journal: Bioorg Med Chem Lett ISSN: 0960-894X Impact factor: 2.823