Abstract
Computer models of hemagglutinins from the H3N2 and H7N9 influenza viruses were developed to study structural organization and dynamic characteristics of the binding site for the conformational rearrangement inhibitors. The metadynamics was used to map the binding site free energy and to define the volume of its most energetically favorable states. It was demonstrated by simulation of the umifenovir (Arbidol) interaction with hemagglutinin that ligand binding requires an increase in the binding site volume and deformation of its most energetically favorable state. We also identified amino acid residues directly involved in the ligand binding that determine the binding efficiency, as well as the dynamic behavior of the binding site. The revealed features of the binding site structural organization of the influenza virus hemagglutinin should be taken into account when searching for new antiviral drugs capable to modulate its functional properties.
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Abbreviations
- CV:
-
collective variable
- HA:
-
hemagglutinin
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Acknowledgements
The study was performed using the equipment of the Center of Collective Use of super high-performance computational resources of the Lomonosov Moscow State University [21].
Funding
This work was supported by the Russian Foundation for Basic Research (project No. 18-315-00390).
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This article does not contain studies with human participants or animals performed by any of the authors. The authors declare that they have no conflict of interest.
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Podshivalov, D., Kirilin, E., Konnov, S. et al. Structural Organization and Dynamic Characteristics of the Binding Site for Conformational Rearrangement Inhibitors in Hemagglutinins from H3N2 and H7N9 Influenza Viruses. Biochemistry Moscow 85, 499–506 (2020). https://doi.org/10.1134/S0006297920040100
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DOI: https://doi.org/10.1134/S0006297920040100