Identification of Regions of the σ-1 Receptor Ligand Binding Site Using a Novel Photoprobe
作者:Arindam Pal、Abdol R. Hajipour、Dominique Fontanilla、Subramaniam Ramachandran、Uyen B. Chu、Timur Mavlyutov、Arnold E. Ruoho
DOI:10.1124/mol.107.038307
日期:2007.10
identified both in a peptide containing steroid binding domain-like I (SBDLI) (amino acids 91-109) and in a peptide containing steroid binding domain-like II (SBDLII) (amino acids 176-194). Because a single population of bindingsites (R(2) = 0.992) for [(125)I]IAF interaction with the sigma-1 receptor was identified by (+)-[(3)H]pentazocine competitive binding with nonradioactive [(127)I]IAF, it was concluded
sigma受体,曾经被认为是一类阿片受体,现在被认为是一类独特的受体,其包含多种配体的结合位点,包括药物1-N(2',6'-dimethylmorpholino)3-(4 -叔丁基丙胺)(fenpropimorph),一种酵母固醇异构酶抑制剂。由于苯丙咪唑对sigma-1受体具有高结合亲和力,因此我们合成了一系列具有不同苯环取代基的苯丙类似物衍生物,并表征了它们与sigma-1受体的结合亲和力。此外,我们合成了无载体的放射性碘化的类似苯丙酸酯样的光亲和标记物1-N-(2',6'-二甲基-吗啉代)-3-(4-叠氮基-3-[(125)I]碘) -苯基)丙烷([(125)I] IAF),将sigma-1受体共价衍生化(25。大鼠肝和豚鼠肝膜中的3 kDa)和大鼠肝膜中的sigma-2受体(18 kDa)具有高特异性。此外,用EndoLys-C和溴化氰裂解豚鼠和大鼠肝膜中特定的[(125)I] I