Chemoenzymatic Synthesis and Pharmacological Characterization of Functionalized Aspartate Analogues As Novel Excitatory Amino Acid Transporter Inhibitors
作者:Haigen Fu、Jielin Zhang、Pieter G. Tepper、Lennart Bunch、Anders A. Jensen、Gerrit J. Poelarends
DOI:10.1021/acs.jmedchem.8b00700
日期:2018.9.13
inhibitors, exhibiting pan activity at EAAT1–4 with IC50 values ranging from 0.49 to 15 μM. Comparisons between (dl-threo)-19a–c and (dl-erythro)-19a–c Asp analogues confirmed that the threo configuration is crucial for the EAAT1–4 inhibitory activities. Analogues (3b–e) of l-TFB-TBOA (3a) were shown to be potent EAAT1–4 inhibitors, with IC50 values ranging from 5 to 530 nM. Hybridization of the nonselective
β-Indolyloxy Functionalized Aspartate Analogs as Inhibitors of the Excitatory Amino Acid Transporters (EAATs)
作者:Na Liu、Anders A. Jensen、Lennart Bunch
DOI:10.1021/acsmedchemlett.0c00342
日期:2020.11.12
designed and synthesized the first β-indolyloxy Asp analogs 15a–d with the aim to probe a hitherto unexplored adjacent pocket to the substrate binding site. The pharmacological properties of 15a–d were characterized at hEAAT1-3 and rEAAT4 in a conventional [3H]-d-Asp uptake assay. Notably, thiophene analog 15b and the para-trifluoromethyl phenyl analog 15d were found to be hEAAT1,2-preferring inhibitors
Structural Aspects of Photopharmacology: Insight into the Binding of Photoswitchable and Photocaged Inhibitors to the Glutamate Transporter Homologue
作者:Valentina Arkhipova、Haigen Fu、Mark W. H. Hoorens、Gianluca Trinco、Lucien N. Lameijer、Egor Marin、Ben L. Feringa、Gerrit J. Poelarends、Wiktor Szymanski、Dirk J. Slotboom、Albert Guskov
DOI:10.1021/jacs.0c11336
日期:2021.1.27
we solved crystal structures of the glutamate transporter homologue GltTk in complex with photoresponsive transport inhibitors-azobenzene derivative of TBOA (both in trans and cis configuration) and with the photocaged compound ONB-hydroxyaspartate. The essential role of glutamate transporters in the functioning of the central nervous system renders them potential therapeutic targets in the treatment
光药理学通过创建具有高时空精度的光激活光响应分子来解决药物选择性和副作用的挑战。这是通过将分子光开关和光笼纳入药效团来实现的。然而,一般来说,光诱导调节抑制效力的结构基础仍然缺失,这对这个新兴的研究领域构成了重大的设计挑战。在这里,我们解决了谷氨酸转运蛋白同系物 GltTk 与光响应转运抑制剂 - TBOA 的偶氮苯衍生物(反式和顺式构型)和光笼化合物 ONB-羟基天冬氨酸复合物的晶体结构。谷氨酸转运蛋白在中枢神经系统功能中的重要作用使其成为治疗神经退行性疾病的潜在治疗靶点。获得的结构为光药理学中光控制的起源提供了清晰的结构见解,并为应用光控制配体通过使用时间分辨 X 射线晶体学研究转运蛋白动力学奠定了基础。
Divergent synthesis of biologically active l-threo-β-hydroxyaspartates from common trans-oxazolidine dicarboxylate
作者:Yoonjae Lee、Youngran Seo、Boram Lee、Hyuenyoung Kwon、Kyungsu Chung、Young Gyu Kim
DOI:10.1007/s00726-022-03196-8
日期:2022.12
A divergent synthetic strategy starting from a common trans-oxazolidine dicarboxylate intermediate has been successful to produce several non-proteinogenic l-threo-β-hydroxyaspartate derivatives efficiently with high stereoselectivity. Three bioactive α-amino-β-hydroxy acids, l-threo-β-hydroxyaspartic acid, l-threo-β-hydroxyasparagine, and l-threo-β-benzyloxyaspartic acid, were synthesized in good
Commercially available omega-carboxy-aldehydes and glycine have been subjected to the catalytic action of an L-threonine aldolase from Escherichia coli to give the corresponding beta-hydroxy-alpha-(L)-amino acids as a mixture of erythro/threo epimers.Specifically, the reaction with glyoxylic acid (2) gave the epimeric beta-hydroxy-(L)-aspartates (t,e)-9 that could be isolated by ion-exchange chromatography in 67% yield. Following esterification and N-Boc protection, the two epimers could be isolated as pure compounds.Similarly, the aldolase-catalyzed addition of glycine to succinic semialdehyde (4) gave the expected mixture of beta-hydroxy-L-alpha-aminoadipic acids (t)-12 and (e)-12 in 34% yield. (C) 2008 Elsevier Ltd. All rights reserved.