RT info:eu-repo/semantics/article T1 Computational study on the affinity of potential drugs to SARS-CoV-2 main protease A1 Martín, Verónica A1 Sanz Novo, Miguel A1 León Ona, Iker A1 Redondo Cristóbal, María del Pilar A1 Largo Cabrerizo, Antonio A1 Barrientos Benito, María Carmen A1 sanz, m K1 molecular docking K1 dexamethasone K1 betamethasone K1 chloroquine K1 hydroxychloroquine K1 SARS-CoV-2 main protease AB Herein, we report a computational investigation of the binding affinity of dexamethasone,betamethasone, chloroquine and hydroxychloroquine to SARS-CoV-2 main proteaseusing molecular and quantum mechanics as well as molecular docking methodologies. We aimto provide information on the anti-COVID-19 mechanism of the abovementioned potentialdrugs against SARS-CoV-2 coronavirus. Hence, the 6w63 structure of the SARS-CoV-2main protease was selected as potential target site for the docking analysis. The studyincludes an initial conformational analysis of dexamethasone, betamethasone, chloroquine andhydroxychloroquine. For the most stable conformers, a spectroscopic analysis has been carriedout. In addition, global and local reactivity indexes have been calculated to predict the chemicalreactivity of these molecules. The molecular docking results indicate that dexamethasoneand betamethasone have a higher affinity than chloroquine and hydroxychloroquinefor their theoretical 6w63 target. Additionally, dexamethasone and betamethasoneshow a hydrogen bond with the His41 residue of the 6w63 protein, while the interactionbetween chloroquine and hydroxychloroquine with this amino acid is weak. Thus, we confirmthe importance of His41 amino acid as a target to inhibit the SARS-CoV-2 Mpro activity. PB IOP Publishing SN 0953-8984 YR 2022 FD 2022 LK https://uvadoc.uva.es/handle/10324/65260 UL https://uvadoc.uva.es/handle/10324/65260 LA spa NO Journal of Physics: Condensed Matter, Volume 34, Number 29 NO Producción Científica DS UVaDOC RD 22-dic-2024