Introduction: Five mutations are located within NTD (L18F, T20N, P26S, D138Y, R190S), three in RBD (K417T, E484K, N501Y), two in the C-terminal domain of S1 and near the furin cleavage site (D614G, H655Y), and one in S2 (T1027I) (Figure 3).
Genomic monitoring unveil the early detection of the SARS-CoV-2 B.1.351 (beta) variant (20H/501Y.V2) in Brazil.
Result: P.1 defining mutations related to each genomic region were the following: ORF1ab: S1188L, K1795Q, E5665D; spike: L18F, T20N, P26S, D138Y, R190S, K417T, E484K, N501Y, H655Y, T1027I; Orf8: E92K; and nucleocapsid: P80.
Trajectory of Growth of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Variants in Houston, Texas, January through May 2021, Based on 12,476 Genome Sequences.
PMID: 34303698
2021
The American journal of pathology
Result: Eighteen patients with this N440K replacement were identified, and 10 patients had the identical combination of spike amino acid replacements: L18R, T95I, R158S, N440K, D614G, P681H, A688V, S735A, and T1027I.
Resistance of SARS-CoV-2 variants to neutralization by monoclonal and serum-derived polyclonal antibodies.
Result: Given these results with viruses encoding E484K mutations, we performed separate studies with human convalescent serum (n =10) and a chimeric SARS-CoV-2 WA1/2020 strain encoding a Brazilian variant spike gene (Wash BR-B.1.1.248; L18F, T20N, P26S, D138Y, R190S, K417T, E484K, N501Y, D614G, H655Y, T1027I, and V1176F [Extended Data Fig 5a]).
Modelling conformational state dynamics and its role on infection for SARS-CoV-2 Spike protein variants.
Discussion: Of the 10 new amino acid mutations in the spike protein (L18F, T20N, P26S, D138Y, R190S, K417T, E484K, N501Y, H655Y, T1027I) compared to its immediate ancestor (B.1.1.28), molecular selection analyses found evidence that 8 of these 10 mutations are under diversifying positive selection.
The Emergence and Spread of Novel SARS-CoV-2 Variants.