Abstract

BackgroundNovel Coronavirus disease 2019 or COVID-19 has become a threat to human society due to fast spreading and increasing mortality. It uses vertebrate hosts and presently deploys humans. Life cycle and pathogenicity of SARS-CoV-2 have already been deciphered and possible drug target trials are on the way.ResultsThe present study was aimed to analyze Non-Structural Proteins that include conserved enzymes of SARS-CoV-2 like papain-like protease, main protease, Replicase, RNA-dependent RNA polymerase, methyltransferase, helicase, exoribonuclease and endoribonucleaseas targets to all known drugs. A bioinformatic based web server Drug ReposeER predicted several drug binding motifs in these analyzed proteins. Results revealed that anti-viral drugs Darunavir,Amprenavir, Rimantadine and Saquinavir were the most potent to have 3D-drug binding motifs that were closely associated with the active sites of the SARS-CoV-2 enzymes .Conclusions Repurposing of the antiviral drugs Darunavir, Amprenavir, Rimantadine and Saquinavir to treat COVID-19 patients could be useful that can potentially prevent human mortality.Graphic abstract

Highlights

  • Novel Coronavirus disease 2019 or COVID-19 has become a threat to human society due to fast spreading and increasing mortality

  • The present work is based on the fact that most of the viral non-structural proteins (NSPs) which include enzymes remain structurally and chemically conserved as they have to interact with human proteins to carry out same biochemical processes within cell

  • Darunavir (DB01264) is the most promising drug as it targeted the greatest number of binding motifs and targeted every molecule except Nsp9

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Summary

Results

The present study was aimed to analyze Non-Structural Proteins that include conserved enzymes of SARS-CoV-2 like papain-like protease, main protease, Replicase, RNA-dependent RNA polymerase, methyltransferase, helicase, exoribonuclease and endoribonucleaseas targets to all known drugs. A bioinformatic based web server Drug ReposeER predicted several drug binding motifs in these analyzed proteins. Results revealed that anti-viral drugs Darunavir,Amprenavir, Rimantadine and Saquinavir were the most potent to have 3D-drug binding motifs that were closely associated with the active sites of the SARS-CoV-2 enzymes

Conclusions
Background
Results and discussion
24 ASP 83 LEU 97 VAL 28
60 VAL 100 PRO 99 VAL 97 VAL
94 ALA 34 ASP 33 ASP
16 ALA 26 ASP 27 ASP
78 ARG 107 PRO 108 VAL
31 ILE 17 GLY 14 ILE 24
84 ARG 244 VAL 277 THR
72 ILE 157 GLY 156 VAL 25
72 ILE 157 GLY 156 VAL
Conclusion
Methods
72 ILE 157 GLY 156 VAL 122 VAL 119 PRO 80 ILE 321 VAL 344 PRO 323 ILE

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