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Emergence of SARS-CoV-2 through Recombination and Strong Purifying Selection
Xiaojun Li; Elena E. Giorgi; Manukumar Honnayakanahalli Marichann; Brian Foley; Chuan Xiao; Xiang-peng Kong; Yue Chen; Bette Korber; Feng Gao.
Afiliação
  • Xiaojun Li; Duke University
  • Elena E. Giorgi; Los Alamos National Laboratory
  • Manukumar Honnayakanahalli Marichann; Duke University
  • Brian Foley; Los Alamos National Laboratory
  • Chuan Xiao; The University of Texas at El Paso
  • Xiang-peng Kong; New York University
  • Yue Chen; Duke University
  • Bette Korber; Los Alamos National Laboratory
  • Feng Gao; Duke University
Preprint em Inglês | bioRxiv | ID: ppbiorxiv-000885
ABSTRACT
COVID-19 has become a global pandemic caused by a novel coronavirus SARS-CoV-2. Understanding the origins of SARS-CoV-2 is critical for deterring future zoonosis and for drug discovery and vaccine development. We show evidence of strong purifying selection around the receptor binding motif (RBM) in the spike gene and in other genes among bat, pangolin and human coronaviruses, indicating similar strong evolutionary constraints in different host species. We also demonstrate that SARS-CoV-2s entire RBM was introduced through recombination with coronaviruses from pangolins, possibly a critical step in the evolution of SARS-CoV-2s ability to infect humans. Similar purifying selection in different host species and frequent recombination among coronaviruses suggest a common evolutionary mechanism that could lead to new emerging human coronaviruses. One Sentence SummaryExtensive Recombination and Strong Purifying Selection among coronaviruses from different hosts facilitate the emergence of SARS-CoV-2
Licença
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Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Idioma: Inglês Ano de publicação: 2020 Tipo de documento: Preprint
Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Idioma: Inglês Ano de publicação: 2020 Tipo de documento: Preprint
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