Abstract
Background: The recent Zika Virus (ZIKV) outbreak provides a spur for new, efficient,
and safe anti-Zika Virus agents. RNA-dependent RNA polymerase (RdRp) is critical amongst the
seven non-structural proteins for viral replication and considered an attractive drug target.
Methods: In this study, molecular docking approach was used to rationally screen the library of
5000 phytochemicals to find inhibitors against NS5 RdRp. LigX tool was used to analyze the 2D
plots of receptor-ligand interactions. The top-ranked compounds were then subjected to in-silico
pharmacokinetic study.
Results: The compounds namely Polydatin, Dihydrogenistin, Liquiritin, Rhapontin and Cichoriin
were successfully bound inside the pocket of NS5 RdRp. Polydatin was the leading phytochemical
that showed high docking score -18.71 (kcal/mol) and bonding interaction at the active-site of NS5
RdRp. They were subjected to analyze drug-like properties that further reinforced their validation
and showed that they have more capability to attach with the receptor as compared to
SOFOSBUVIR control drug. MD simulation of the top two complexes was performed and the
simulated complexes showed stability and ligands were kept within the bonding pocket.
Conclusion: The study might facilitate the development of a natural and cost-effective drug
against ZIKV. Further validation, however, is necessary to confirm its effectiveness and its
biocompatibility.
Keywords:
Zika virus, NS5-RdRp, phytochemicals, drugs, biocompatibility, molecular docking
Graphical Abstract
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