B(0)AT2, encoded by the SLC6A15 gene, is a transporter for neutral amino acids that has recently been implicated in mood and metabolic disorders. It is predominantly expressed in the brain, but little is otherwise known about its function. To identify inhibitors for this transporter, we screened a library of 3133 different bioactive compounds. Loratadine, a clinically used histamine H1 receptor antagonist, was identified as a selective inhibitor of B(0)AT2 with an IC50 of 4 μM while being less active or inactive against several other members of the SLC6 family. Reversible inhibition of B(0)AT2 was confirmed by electrophysiology. A series of loratadine analogues were synthesized to gain insight into the structure-activity relationships. Our studies provide the first chemical tool for B(0)AT2.
Discovery of novel nonpeptide tricyclic inhibitors of ras farnesyl protein transferase
作者:F. George Njoroge、Ronald J. Doll、Bancha Vibulbhan、Carmen S. Alvarez、W. Robert Bishop、Joanne Petrin、Paul Kirschmeier、Nicholas I. Carruthers、Jesse K. Wong、Margaret M. Albanese、John J. Piwinski、Joseph Catino、V. Girijavallabhan、Ashit K. Ganguly
DOI:10.1016/s0968-0896(96)00206-4
日期:1997.1
A comprehensive structure-activity relationship (SAR) study of novel tricyclic amides has been undertaken. The discovery of compounds that are potent FPT inhibitors in the nanomolar range has been achieved. These compounds are nonpeptidic and do not contain sulfhydryl groups. They selectively inhibit farnesyl protein transferase (FPT) and not geranylgeranyl protein transferase-1 (GGPT-1). They also inhibit H-Ras processing in Cos monkey kidney cells. Copyright (C) 1997 Elsevier Science Ltd.
作者:Elizabeth A. Stone、Kara J. Cutrona、Scott J. Miller
DOI:10.1021/jacs.0c03904
日期:2020.7.22
Analogs of the conformationally dynamic Claritin® (loratadine) and Clarinex® (desloratadine) scaffolds have been enantio- and chemoselectively N-oxidized using an aspartic acidcontaining peptide catalyst to afford stable, helically chiral products in up to >99:1 er. The conformational dynamics and enantiomeric stability of the N-oxide products have been investigated experimentally and computationally
构象动态 Claritin®(氯雷他定)和 Clarinex®(地氯雷他定)支架的类似物已使用含天冬氨酸的肽催化剂对映体和化学选择性 N-氧化,以提供高达 >99:1 er 的稳定螺旋手性产品。N-氧化物产物的构象动力学和对映体稳定性已经在晶体学数据的帮助下通过实验和计算进行了研究。此外,生物测定表明,通过 N-氧化使氯雷他定和相关类似物的核心结构刚性化会以对映异构体依赖的方式影响抗组胺药活性。计算对接研究说明了观察到的活性差异。