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- W4313236507 abstract "The SARS-CoV-2 'Omicron' strain, with 15 mutations in the receptor binding domain (RBD), was detected in South Africa and rapidly spread worldwide. SARS-CoV-2 ORF9b protein by binding to the TOM70 receptor and ORF8 protein by binding to MHC-I, IF3 receptors inhibit the host's immune response. In this study, genomics variations were evaluated for 96 samples isolated from Iran from March to July 2022 using the Nextclade web server and informatics tools. We identified the mutations occurring in the SARS-CoV-2 proteins. We also evaluated the effect of mutations on spike protein interaction with the ACE2 receptor, ORF9b protein interaction with the TOM70 receptor, and structural stability of ORF8 and nucleocapsid proteins using docking and molecular dynamics. Results indicated that during March and April 2022, the BA.2 strain was dominant in the south of Iran, while during June 2022, the BA.5 strain was dominant. BF.5 strain had the most divergence among SARS-CoV-2 strains reported from south of Iran. The binding affinity of BA.5 and BF.5 strains spike protein to ACE2 receptor is similar, and compared to BA.2 strain, was stronger. The BF.5 ORF9b K40R mutation causes a better binding affinity of the protein to the TOM70 receptor. Also, mutations that occurred in the ORF8 protein led to instability in the dimer formation of this protein and improved immune response for mutations that occurred in BA.2 strain, while this mutation did not occur in BF.5 strain. The mutations that were detected in nucleocapsid protein CTD and NTD domains caused the stability of these domains.Communicated by Ramaswamy H. Sarma." @default.
- W4313236507 created "2023-01-06" @default.
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- W4313236507 date "2022-12-28" @default.
- W4313236507 modified "2023-10-03" @default.
- W4313236507 title "Characterization of <i>SARS-CoV-2</i> omicron variants from Iran and evaluation of the effect of mutations on the spike, nucleocapsid, ORF8, and ORF9b proteins function" @default.
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- W4313236507 doi "https://doi.org/10.1080/07391102.2022.2162131" @default.
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