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Structural and functional impact by SARS-CoV-2 Omicron spike mutations
Christy Lavine; Haisun Zhu; Krishna Anand; Pei Tong; Avneesh Gautam; Megan Mayer; Shaowei Wang; Wei Yang; Michael Seaman; Jianming Lu.
Afiliação
  • Christy Lavine; Beth Israel Deaconess Medical Center
  • Haisun Zhu; Institute for Protein Innovation/Harvard Institutes of Medicine
  • Krishna Anand; Institute for Protein Innovation/Harvard Institutes of Medicine
  • Pei Tong; Brigham and Womens Hospital
  • Avneesh Gautam; Brigham and Womens Hospital
  • Megan Mayer; Harvard Medical School
  • Shaowei Wang; Codex BioSolutions, Inc.
  • Wei Yang; Institute for Protein Innovation
  • Michael Seaman; Beth Israel Deaconess Medical Center
  • Jianming Lu; Codex BioSolutions, Inc.
Preprint em Inglês | bioRxiv | ID: ppbiorxiv-475922
ABSTRACT
The Omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), bearing an unusually high number of mutations, has become a dominant strain in many countries within several weeks. We report here structural, functional and antigenic properties of its full-length spike (S) protein with a native sequence in comparison with those of previously prevalent variants. Omicron S requires a substantially higher level of host receptor ACE2 for efficient membrane fusion than other variants, possibly explaining its unexpected cellular tropism. Mutations not only remodel the antigenic structure of the N-terminal domain of the S protein, but also alter the surface of the receptor-binding domain in a way not seen in other variants, consistent with its remarkable resistance to neutralizing antibodies. These results suggest that Omicron S has acquired an extraordinary ability to evade host immunity by excessive mutations, which also compromise its fusogenic capability.
Licença
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Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Tipo de estudo: Experimental_studies Idioma: Inglês Ano de publicação: 2022 Tipo de documento: Preprint
Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Tipo de estudo: Experimental_studies Idioma: Inglês Ano de publicação: 2022 Tipo de documento: Preprint
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