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Basic Characteristics of Mutations
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Mutation Site
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G1267R |
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Mutation Site Sentence
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Notably, some isolates carried one or more unusual mutations, such as A67T, P330L, A372S, T696S, I742N, V915I, A1020T, G1124C, and G1267R. |
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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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S |
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Standardized Encoding Gene
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S
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Genotype/Subtype
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B.1.617.2 |
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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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Turkey |
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Literature Information
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PMID
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36992510
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Title
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Molecular Characterization and Cluster Analysis of SARS-CoV-2 Viral Isolates in Kahramanmaras City, Turkey: The Delta VOC Wave within One Month
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Author
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Marascio N,Cilburunoglu M,Torun EG,Centofanti F,Mataj E,Equestre M,Bruni R,Quirino A,Matera G,Ciccaglione AR,Yalcinkaya KT
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Journal
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Viruses
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Journal Info
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2023 Mar 21;15(3):802
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Abstract
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The SARS-CoV-2 pandemic has seriously affected the population in Turkey. Since the beginning, phylogenetic analysis has been necessary to monitor public health measures against COVID-19 disease. In any case, the analysis of spike (S) and nucleocapsid (N) gene mutations was crucial in determining their potential impact on viral spread. We screened S and N regions to detect usual and unusual substitutions, whilst also investigating the clusters among a patient cohort resident in Kahramanmaras city, in a restricted time span. Sequences were obtained by Sanger methods and genotyped by the PANGO Lineage tool. Amino acid substitutions were annotated comparing newly generated sequences to the NC_045512.2 reference sequence. Clusters were defined using phylogenetic analysis with a 70% cut-off. All sequences were classified as Delta. Eight isolates carried unusual mutations on the S protein, some of them located in the S2 key domain. One isolate displayed the unusual L139S on the N protein, while few isolates carried the T24I and A359S N substitutions able to destabilize the protein. Phylogeny identified nine monophyletic clusters. This study provided additional information about SARS-CoV-2 epidemiology in Turkey, suggesting local transmission of infection in the city by several transmission routes, and highlighting the necessity to improve the power of sequencing worldwide.
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Sequence Data
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OQ608097-OQ608154 (spike sequences);OQ608155-OQ608212 (nucleocapsid sequences)
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