Method: The B.1.1.7 Spike we used carries the mutations found in GISAID Accession Number EPI_ISL 668152: del 69-70, del145, N501Y, A570D, D614G, P681H, T716I, S982A, and D1118H.
Structural modelling of SARS-CoV-2 alpha variant (B.1.1.7) suggests enhanced furin binding and infectivity.
Introduction: The B.1.1.7 SARS-CoV-2 variant strain exhibits missense mutations (N501Y, A570D, P681H, D614G, T716I, S982A, D1118H) and three deletions in residues H69, V70, Y144.
Result: Genome sequencing of the new B.1.1.7 SARS-CoV-2 strain presented missense mutations (N501Y, A570D, P681H, D614G, T716I, S982A, D1118H) and three deletions in residues H69, V70, Y144.
Modelling conformational state dynamics and its role on infection for SARS-CoV-2 Spike protein variants.
Result: Co-existence of DeltaH69V70, DeltaY144, P681H, T716I, S982A, A570D, N501Y, and D1118H was the signature for the B.1.1.7 (20H/501Y.V1) variant.
Result: The last notable increasing trend was detected for D1118H, from 0.88% in December to 49.68% in February (OR: 9.90, 95% CI 6.83-15.01, p < 0.0001).
Discussion: Our analysis shows that subsequently, three genetic lines of the SARS-CoV-2 molecular evolution have emerged, with the largest clade (Clade 1, lineages B.1.1.*) being the most diverse genetically, with a significant proportion (24.6% for this clade) of the VOC B.1.1.7 variant characterized by a signature combination of the DeltaY144, PMID: 34409009
2021
Frontiers in public health
Table: D1118H
Epitope diversity of SARS-CoV-2 hyperimmune intravenous human immunoglobulins and neutralization of variants of concern.
Novel Nested-Seq Approach for SARS-CoV-2 Real-Time Epidemiology and In-Depth Mutational Profiling in Wastewater.
PMID: 34445204
2021
International journal of molecular sciences
Result: According to the % frequencies of the genetic markers A570D (23271C>A), D614G (23403A>G), P681H (23604C>A), T716I (23709C>T), S982A (24506T>G), and D1118H (24914GG>C), the Beta.1.1.7/alpha lineage VOC was detected in 80.6% +- 8.3 (mean +- SE), (median of 80.8%) of the total sequencing reads.
Delta spike P681R mutation enhances SARS-CoV-2 fitness over Alpha variant.