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?:abstract
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COVID-19, responsible for several deaths, demands a cumulative effort of scientists worldwide to curthe pandemic The main protease, responsible for the cleavage of the polyprotein and formation of replication complex in virus, is considered as a promising target for the development of potential inhibitors to treat the novel coronavirus The effectiveness of FDA approved drugs targeting the main protease in previous SARS-COV (s) reported earlier indicates the chances of success for the repurposing of FDA drugs against SARS-COV-2 Therefore, in this study, molecular docking and virtual screening of FDA approved drugs, primarily of three categories: antiviral, antimalarial, and peptide, are carried out to investigate their inhibitory potential against the main protease Virtual screening has identified 53 FDA drugs on the basis of their binding energies ( -7 0 kcal/mol), out of which the totwo drugs Velpatasvir (-9 1 kcal/mol) and Glecaprevir (-9 0 kcal/mol) seem to have great promise These drugs have a stronger affinity to the SARS-CoV-2 main protease than the crystal bound inhibitor α-ketoamide 13(-6 7 kcal/mol) or Indinavir (-7 5 kcal/mol) that has been proposed in a recent study as one of the best drugs for SARS-CoV-2 The in-silico efficacies of the screened drugs could be instructive for further biochemical and structural investigation for repurposing The molecular dynamics studies on the shortlisted drugs are underway
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