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Basic Characteristics of Mutations
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Mutation Site
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T24I |
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Mutation Site Sentence
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In 2021, during the 3rd to 4th waves, several mutations carried over including the following: G15S and T24I in the 3CLpro, L21I and S68F/P in the E protein; L29F and I82T in the M protein; P13L, R203K, G204R and Q384H in the N protein; E102K in the nsp1 protein; L438P in the nsp4 protein; del106-108 in the nsp6 protein; S216L, T229N, del255 and L275F in the ORF3a; T428I and T819I in the PLpro protein, and P323L in the RdRp protein; P9L, P25L, C136F, delY144, R190S, D215G, del243-244, Y449H, E484K, N501Y, L585F, D614G, H655Y, N679K, T716I, and T859N in the S protein (Figure 4B, Table S10). |
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Mutation Level
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Amino acid level |
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Mutation Type
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Nonsynonymous substitution |
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Gene/Protein/Region
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3CLpro |
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Standardized Encoding Gene
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ORF1a
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Genotype/Subtype
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C.1.2 |
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Viral Reference
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NC_045512.2
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Functional Impact and Mechanisms
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Disease
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COVID-19
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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Y |
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Treatment
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- |
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Location
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South Africa |
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Literature Information
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PMID
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37243279
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Title
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Molecular Epidemiology of SARS-CoV-2 during Five COVID-19 Waves and the Significance of Low-Frequency Lineages
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Author
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Subramoney K,Mtileni N,Giandhari J,Naidoo Y,Ramphal Y,Pillay S,Ramphal U,Maharaj A,Tshiabuila D,Tegally H,Wilkinson E,de Oliveira T,Fielding BC,Treurnicht FK
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Journal
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Viruses
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Journal Info
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2023 May 18;15(5):1194
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Abstract
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SARS-CoV-2 lineages and variants of concern (VOC) have gained more efficient transmission and immune evasion properties with time. We describe the circulation of VOCs in South Africa and the potential role of low-frequency lineages on the emergence of future lineages. Whole genome sequencing was performed on SARS-CoV-2 samples from South Africa. Sequences were analysed with Nextstrain pangolin tools and Stanford University Coronavirus Antiviral & Resistance Database. In 2020, 24 lineages were detected, with B.1 (3%; 8/278), B.1.1 (16%; 45/278), B.1.1.348 (3%; 8/278), B.1.1.52 (5%; 13/278), C.1 (13%; 37/278) and C.2 (2%; 6/278) circulating during the first wave. Beta emerged late in 2020, dominating the second wave of infection. B.1 and B.1.1 continued to circulate at low frequencies in 2021 and B.1.1 re-emerged in 2022. Beta was outcompeted by Delta in 2021, which was thereafter outcompeted by Omicron sub-lineages during the 4th and 5th waves in 2022. Several significant mutations identified in VOCs were also detected in low-frequency lineages, including S68F (E protein); I82T (M protein); P13L, R203K and G204R/K (N protein); R126S (ORF3a); P323L (RdRp); and N501Y, E484K, D614G, H655Y and N679K (S protein). Low-frequency variants, together with VOCs circulating, may lead to convergence and the emergence of future lineages that may increase transmissibility, infectivity and escape vaccine-induced or natural host immunity.
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Sequence Data
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EPI_SET_230215tf;EPI_SET_221129ph
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