Rebamipide and Derivatives are Potent, Selective Inhibitors of Histidine Phosphatase Activity of the Suppressor of T Cell Receptor Signaling Proteins
作者:Faisal Aziz、Kanamata Reddy、Virneliz Fernandez Vega、Raja Dey、Katherine A. Hicks、Sumitha Rao、Luis Ortiz Jordan、Emery Smith、Justin Shumate、Louis Scampavia、Nicholas Carpino、Timothy P. Spicer、Jarrod B. French
DOI:10.1021/acs.jmedchem.3c01763
日期:2024.2.8
signaling (Sts) proteins are negative regulators of immune signaling. Genetic inactivation of these proteins leads to significant resistance to infection. From a 590,000 compound high-throughput screen, we identified the 2-(1H)-quinolinone derivative, rebamipide, as a putative inhibitor of Sts phosphatase activity. Rebamipide, and a small library of derivatives, are competitive, selective inhibitors of Sts-1
T 细胞受体信号传导 (Sts) 蛋白的抑制蛋白是免疫信号传导的负调节因子。这些蛋白质的基因失活导致对感染的显着抵抗力。从 590,000 个化合物的高通量筛选中,我们鉴定出 2-( 1H )-喹啉酮衍生物瑞巴派特是 Sts 磷酸酶活性的推定抑制剂。瑞巴派特和一小部分衍生物是 Sts-1 的竞争性选择性抑制剂,IC 50值从低到亚微摩尔。 SAR 分析表明喹啉酮、酸和酰胺部分对于活性都是必需的。晶体结构证实了 SAR 并揭示了此类化合物与蛋白质之间的关键相互作用。尽管瑞巴派特的细胞渗透性较差,但我们证明脂质体制剂可以灭活细胞中Sts-1的磷酸酶活性。这些研究表明,Sts-1 酶活性可以通过药理学灭活,并为开发针对 Sts 蛋白的免疫增强疗法提供基础工具和见解。