Development of a Model for the .delta. Opioid Receptor Pharmacophore. 1. Conformationally Restricted Tyr1 Replacements in the Cyclic .delta. Receptor Selective Tetrapeptide Tyr-c[D-Cys-Phe-D-Pen]OH (JOM-13)
作者:Henry I. Mosberg、Andrei L. Lomize、Chenguang Wang、Heather Kroona、Deborah L. Heyl、Katarzyna Sobczyk-Kojiro、Wenli Ma、Carol Mousigian、Frank Porreca
DOI:10.1021/jm00051a015
日期:1994.12
and in aqueous solution, as previously determined from X-ray crystallography and 1H NMR spectroscopy data (Lomize, A; et al. J. Am. Chem. Soc. 1994, 116, 429-436). All the peptides have similar sets of low-energy conformations of their common flexible elements, the Phe3 side chain and the peptide group between the first residue and the rigid tripeptide cycle. However, possible conformations of the
制备了一系列构象受限的δ阿片受体选择性四肽Tyr-c [D-Cys-Phe-D-Pen] OH(JOM 13)类似物,其中构象不稳定的Tyr残基被几种不太灵活的酪氨酸类似物所取代。在这些酪氨酸类似物中,有双环结构1,2,3,4-四氢-7-羟基异喹啉-3-羧酸(HO-Tic),2-氨基-6-羟基四氢萘-2-羧酸(Hat)和2 -氨基5-羟基茚满-2-羧酸(Hai),其中由于侧链对骨架的环化作用,绕Cα-Cβ和Cβ-Cγ键的旋转受到限制。还检查了类似物,其中酪氨酸被反式-3-(4'-羟苯基)脯氨酸(t-Hpp)或顺式-3-(4'-羟苯基)脯氨酸(c-Hpp)取代,其残基旋转C alpha-C beta,但不受C beta-Cγ的限制。t-Hpp1和c-Hpp1类似物都显示出与亲本含Tyr1的肽相似的delta受体结合亲和力,而D-Hat1,L-Hat1和L-Hai1类似物显示出较低的亲和力。对