Identification of Pyrazole Derivative as an Antiviral Agent Against Chikungunya Through HTVS
作者:Surender Singh Jadav、Barij Nayan Sinha、Boris Pastorino、Xavier de Lamballerie、Rolf Hilgenfeld、Venkatesan Jayaprakash
DOI:10.2174/1570180811666141001005402
日期:2015.2.4
Structure based High-throughput Virtual Screening (HTVS) of ChikV nsP2 protease (PDB: 3TRK) with two
publicly available database ZINC12 and BindingDB has been carried out to identify suitable inhibitors for the treatment of
chikungunya infection. HTVS protocol implemented in GLIDE 5.0 (Schrodinger LLC) has been employed to screen the
drug-like subset of ZINC12 (10,090,210) and protease inhibitors in BindingDB (83,000). One of the chemical scaffolds
from the list of different chemical classes was selected for the synthesis of (ZINC04725220, compound 11). Few more
schiff’s bases (13-21) were also synthesized with the intermediate 1,3-diphenyl-1H-pyrazole-4-carbaldehyde (4-6) and
tested for anti-ChikV (strain OPY1, Reunion Island 2006) activity using Cytopathic effect reduction (CPE) assay. Surprisingly,
only compound 11(IC50: 5µg/ml ie 14.15 µM) has shown inhibitory activity against ChikV. Further precise docking
of compound 11 with target protein was carried out to understand the molecular interactions important for activity.
基于结构的ChikV nsP2蛋白酶(PDB: 3TRK)高通量虚拟筛选(HTVS)使用了两个公开数据库ZINC12和BindingDB,旨在寻找适用于治疗基孔肯雅热感染的合适抑制剂。在GLIDE 5.0(Schrodinger LLC)中实施的HTVS协议被用于筛选ZINC12的药物样子集(10,090,210个)以及BindingDB中的蛋白酶抑制剂(83,000个)。从不同化学类别列表中选取了一种化学骨架用于合成(ZINC04725220,化合物11)。此外,还合成了几个席夫碱(13-21),使用中间体1,3-二苯基-1H-吡唑-4-甲醛(4-6)并进行了抗ChikV(OPY1菌株,2006年留尼汪岛)活性测试,采用细胞病变效应减少(CPE) assay。出人意料的是,只有化合物11(IC50: 5µg/ml即14.15 µM)显示出对ChikV的抑制活性。为了理解化合物11与目标蛋白之间重要的分子相互作用,进一步进行了精确对接。