作者:Mercedes Martín-Martínez、Natalia De la Figuera、Miriam Latorre、Rosario Herranz、M. Teresa García-López、Edurne Cenarruzabeitia、Joaquín Del Río、Rosario González-Muñiz
DOI:10.1021/jm000959x
日期:2000.10.1
approximately 6-fold higher CCK(1) selectivity than analogue 16a, with the type II mimetic. From these results, we propose that the presence of a beta-turn-like conformation within the peptide backbone of dipeptoids could contribute to their bioactive conformation at the CCK(1) receptor subtype. Concerning functional activity, compounds 15a and 16a behave as CCK(1) receptor antagonists.
为了提高我们对CCK(1)拮抗剂的生物活性构象的认识,我们先前曾描述过用(2S,5S,11bR)-2-氨基-3-氧六氢吲哚并[8,7- b] indole-5-carbox ylate(IBTM)骨架,一种探测的II'型β-转弯模拟物,导致了受限的类似物(2S,5S,11bR,1'S)-和(2S,5S,11bR,1'R)- 2-(苄氧羰基)氨基-5- [1'-苄基-2'-(羧基)乙基]氨基甲酰基-3-氧代-2,3,5,6,11,11b-六氢-1H-吲哚并[8, 7-b]吲哚,1a,b,显示出对CCK(1)受体的高结合亲和力和选择性。在这份报告中,我们描述了化合物1的新类似物的合成和结合概况,旨在探索C末端残基的重要性以及受体结合亲和力和选择性的β转角类型的重要性。结构亲和关系的研究表明,C末端的游离羧酸和Phe和betaHph残基的S构型有利于CCK(1)受体识别。而且,该受体亚型的选择性