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Related Concept Videos

Coronavirus01:29

Coronavirus

Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors Of Virion Release01:25

Inhibitors Of Virion Release

Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Antiviral Nucleoside Inhibitors01:22

Antiviral Nucleoside Inhibitors

Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...

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Related Experiment Video

Updated: Jul 9, 2026

Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
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Fragment-based inhibitor design for SARS-CoV2 main protease.

Priyanka Andola1, Jishu Pagag1, Durgam Laxman1

  • 1School of Chemistry, University of Hyderabad, Hyderabad, 500046 India.

Structural Chemistry
|July 11, 2022
PubMed
Summary

This study identifies potential inhibitors for the SARS-CoV-2 main protease using fragment-based drug discovery. Computational methods validated the stability and binding of these novel COVID-19 drug candidates.

Keywords:
Binding free energyFragment-based drug discoveryMechanical stiffnessMolecular dockingMolecular dynamics simulationsNormal mode analysisPrincipal component analysisSARS-CoV2 main proteaseVirtual screening

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Area of Science:

  • Medicinal Chemistry
  • Computational Biology
  • Virology

Background:

  • Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) causes COVID-19, a global pandemic with significant mortality.
  • Targeting the SARS-CoV-2 main protease is a key strategy for developing antiviral therapies.
  • The protease is essential for viral replication, cleaving polyproteins into functional units.

Purpose of the Study:

  • To identify novel hit molecule inhibitors for the SARS-CoV-2 main protease.
  • To utilize fragment-based drug discovery (FBDD) approach.
  • To leverage the crystal structure of a known chromene-based inhibitor (PDB_ID: 6M2N).

Main Methods:

  • Fragment-based drug discovery (FBDD) was employed.
  • Molecular docking and molecular dynamics simulations were used for validation.
  • Binding free energies, normal mode analysis, mechanical stiffness, and principal component analysis assessed complex stability.

Main Results:

  • Novel hit molecules targeting the SARS-CoV-2 main protease were identified.
  • Computational validation confirmed the stability and binding of designed inhibitors.
  • Detailed analyses provided insights into the molecular interactions and stability of the complexes.

Conclusions:

  • The study successfully identified potential inhibitors for SARS-CoV-2 main protease using FBDD.
  • Computational simulations validated the efficacy and stability of these drug candidates.
  • These findings contribute to the development of new therapeutic strategies against COVID-19.