Result: Of the 93 substitutions that were present in 2020, 61 were no longer present during March 2021 (Figure 5C), and only 8 were present in >5% of samples during March 2021 (NSP2:T85I, NSP12:P323L, S:L5F, S:D614G, NS3aQ57H, NS8:S24L, N:R203K, and N:G204R).
Mutations in viral nucleocapsid protein and endoRNase are discovered to associate with COVID19 hospitalization risk.
Discussion: Within North America, it was reported that one of the top mutations, 27964C>T-(S24L) in the ORF8 protein, has an unusually strong gender dependence.
Viral Mimicry of Interleukin-17A by SARS-CoV-2 ORF8.
Result: Correspondingly, the L84S variant failed to induce CCL20, CXCL1, and IL6 expression, whereas the V62L and S24L variants induced detectably lower expression of CCL20, CXCL1, and IL6 compared to WT ORF8.
Result: The S24L and V62L variants also showed detectable reduction of the surface binding activity to THP-1 and hIL-17RA-expressing 293T cells but minor changes of the surface binding activity to hIL-17RC-expressing 293T cells.
Result: Three variants, S24L, V62L, and L84S, the most frequently emerged ORF8 variants in America.
Result: When hIL-17RA-expressing or hIL-17RC-expressing 293T cells and THP-1 cells were incubated
SARS-CoV-2 Mutations and Their Impact on Diagnostics, Therapeutics and Vaccines.
Introduction: In the US, Q57H mutation in the ORF3a region, and S24L and L84S in ORF8 was found to be prevalent, suggesting a positive effect on transmission or virulence.
Correlates of SARS-CoV-2 Variants on Deaths, Case Incidence and Case Fatality Ratio among the Continents for the Period of 1 December 2020 to 15 March 2021.
Abstract: Since several mutations in ORF8 have been observed, therefore, in the present study, we adapted structural and biophysical analysis approaches to explore the impact of various mutations of ORF8, such as S24L, L84S, V62L, and W45L, the recently circulating mutant in Pakistan, on its ability to bind IRF3 and to evade the host immune system.
Method: Amber20 was used to perform the dynamic behavior analysis of ORF8 WT and ORF8 with mutations of S24L, W45L, V62L, and L84S through MD simulation that uses FF14SB force field.