The present invention relates to soluble fragments of the Influenza virus RNA dependent RNA polymerase subunit PB2 and variants thereof, and crystallized complexes thereof comprising an RNA cap analog. This invention also relates to computational methods using the structural coordinates of said complex to screen for and design compounds that interact with the RNA cap binding pocket. In addition, this invention relates to methods identifying compounds that bind to PB2 polypeptide fragments comprising the RNA cap binding pocket, preferably inhibit the interaction with RNA caps or analogs thereof, by using said PB2 polypeptide fragments, preferably in a high-throughput setting. This invention also relates to compounds and pharmaceutical compositions comprising the identified compounds for the treatment of disease conditions due to viral infections caused by negative-sense single stranded RNA viruses.
本发明涉及流感病毒 RNA 依赖性 RNA 聚合酶亚基 PB2 的可溶性片段及其变体,以及包含 RNA 帽类似物的结晶复合物。本发明还涉及使用所述复合物的结构坐标来筛选和设计与 RNA 帽结合口袋相互作用的化合物的计算方法。此外,本发明还涉及通过使用所述 PB2
多肽片段,最好是在高通量环境下,鉴定与包含 RNA帽结合口袋的 PB2
多肽片段结合的化合物,最好是抑制与 RNA帽或其类似物相互作用的化合物的方法。本发明还涉及用于治疗由负义单链 RNA 病毒引起的病毒感染所致疾病的化合物和包含所鉴定化合物的药物组合物。