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10.1371/journal.pcbi.1008269

http://scihub22266oqcxt.onion/10.1371/journal.pcbi.1008269
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32941419!7523987!32941419
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suck abstract from ncbi


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pmid32941419      PLoS+Comput+Biol 2020 ; 16 (9): e1008269
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  • Genetic grouping of SARS-CoV-2 coronavirus sequences using informative subtype markers for pandemic spread visualization #MMPMID32941419
  • Zhao Z; Sokhansanj BA; Malhotra C; Zheng K; Rosen GL
  • PLoS Comput Biol 2020[Sep]; 16 (9): e1008269 PMID32941419show ga
  • We propose an efficient framework for genetic subtyping of SARS-CoV-2, the novel coronavirus that causes the COVID-19 pandemic. Efficient viral subtyping enables visualization and modeling of the geographic distribution and temporal dynamics of disease spread. Subtyping thereby advances the development of effective containment strategies and, potentially, therapeutic and vaccine strategies. However, identifying viral subtypes in real-time is challenging: SARS-CoV-2 is a novel virus, and the pandemic is rapidly expanding. Viral subtypes may be difficult to detect due to rapid evolution; founder effects are more significant than selection pressure; and the clustering threshold for subtyping is not standardized. We propose to identify mutational signatures of available SARS-CoV-2 sequences using a population-based approach: an entropy measure followed by frequency analysis. These signatures, Informative Subtype Markers (ISMs), define a compact set of nucleotide sites that characterize the most variable (and thus most informative) positions in the viral genomes sequenced from different individuals. Through ISM compression, we find that certain distant nucleotide variants covary, including non-coding and ORF1ab sites covarying with the D614G spike protein mutation which has become increasingly prevalent as the pandemic has spread. ISMs are also useful for downstream analyses, such as spatiotemporal visualization of viral dynamics. By analyzing sequence data available in the GISAID database, we validate the utility of ISM-based subtyping by comparing spatiotemporal analyses using ISMs to epidemiological studies of viral transmission in Asia, Europe, and the United States. In addition, we show the relationship of ISMs to phylogenetic reconstructions of SARS-CoV-2 evolution, and therefore, ISMs can play an important complementary role to phylogenetic tree-based analysis, such as is done in the Nextstrain project. The developed pipeline dynamically generates ISMs for newly added SARS-CoV-2 sequences and updates the visualization of pandemic spatiotemporal dynamics, and is available on Github at https://github.com/EESI/ISM (Jupyter notebook), https://github.com/EESI/ncov_ism (command line tool) and via an interactive website at https://covid19-ism.coe.drexel.edu/.
  • |*Coronavirus Infections/epidemiology/transmission/virology[MESH]
  • |*Pandemics[MESH]
  • |*Pneumonia, Viral/epidemiology/transmission/virology[MESH]
  • |Betacoronavirus/*classification/*genetics[MESH]
  • |COVID-19[MESH]
  • |Evolution, Molecular[MESH]
  • |Genetic Markers/genetics[MESH]
  • |Genome, Viral/genetics[MESH]
  • |Genomics/*methods[MESH]
  • |Humans[MESH]
  • |Mutation/genetics[MESH]
  • |Phylogeny[MESH]
  • |RNA, Viral/genetics[MESH]
  • |SARS-CoV-2[MESH]
  • |Sequence Alignment[MESH]
  • |Sequence Analysis, RNA[MESH]


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