Stereoselective Chemoenzymatic Synthesis of the Four Stereoisomers of <scp>l</scp>-2-(2-Carboxycyclobutyl)glycine and Pharmacological Characterization at Human Excitatory Amino Acid Transporter Subtypes 1, 2, and 3
作者:Sophie Faure、Anders A. Jensen、Vincent Maurat、Xin Gu、Emmanuelle Sagot、David J. Aitken、Jean Bolte、Thierry Gefflaut、Lennart Bunch
DOI:10.1021/jm060822s
日期:2006.11.1
the corresponding cis and trans-2-oxalylcyclobutanecarboxylic acids 5 and 6 using the enzymes aspartate aminotransferase (AAT) and branched chain aminotransferase (BCAT) from Escherichia coli. The four stereoisomeric compounds were evaluated as potential ligands for the human excitatory amino acid transporters, subtypes 1, 2, and 3 (EAAT1, EAAT2, and EAAT3) in the FLIPR membrane potential assay. While
以高收率和高对映体过量合成了l-2-(2-羧基环丁基)甘氨酸,l-CBG-I,l-CBG-II,l-CBG-III和l-CBG-IV的四种立体异构体,使用大肠杆菌的天冬氨酸氨基转移酶(AAT)和支链氨基转移酶(BCAT)从相应的顺式和反式-2-草酰环丁烷羧酸5和6中提取。在FLIPR膜电位测定法中,将四种立体异构体化合物评估为人类兴奋性氨基酸转运蛋白亚型1、2和3(EAAT1,EAAT2和EAAT3)的潜在配体。虽然一个反式立体异构体1-CBG-I在所有三个转运蛋白EAAT1-3上均显示较弱的底物活性,但我们发现另一种反式立体异构体1-CBG-II具有特定的药理学特征,其显示了EAAT1底物活性。以及对EAAT2和EAAT3的抑制活性。