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Estructura, función y antigeneidad de la glicoproteína del pico del SARS-CoV-2
Alexandra C Walls1, Young-Jun Park1, M Alejandra Tortorici2
1Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.
Cell
|March 11, 2020
Resumen
La proteína del pico del SARS-CoV-2 usa ACE2 para entrar en las células, similar al SARS-CoV. Un sitio de escisión de furin único en el SARS-CoV-2
Área de la Ciencia:
- Virología
- Biología estructural
- Inmunología
Sus antecedentes:
- Surgió el síndrome respiratorio agudo severo coronavirus 2 (SARS-CoV-2), causando un impacto significativo en la salud mundial.
- Las glicoproteínas del pico (S) del coronavirus son cruciales para la entrada del virus y son objetivos principales para neutralizar los anticuerpos.
- Comprender la estructura y la función de la proteína S del SARS-CoV-2 es vital para desarrollar contramedidas médicas.
Objetivo del estudio:
- Para investigar el mecanismo de entrada celular del SARS-CoV-2.
- Caracterizar las características estructurales de la glicoproteína S del SARS-CoV-2.
- Para explorar estrategias terapéuticas potenciales dirigidas a la proteína S.
Principales métodos:
- Análisis de la interacción de la proteína S del SARS-CoV-2 con la enzima convertidora de angiotensina humana 2 (ACE2).
- Determinación de las estructuras de cryo-electrónica (cryo-EM) del trímero del ectodominio S del SARS-CoV-2.
- Evaluación de la neutralización de anticuerpos contra la entrada viral mediada por S del SARS-CoV-2.
Principales resultados:
- El SARS-CoV-2 S utiliza ACE2 para entrar en las células, con una afinidad de unión similar al ACE2 humano como el SARS-CoV S.
- Se identificó un nuevo sitio de escisión de furin en el límite de la subunidad S1/S2 del SARS-CoV-2 S, distinguiéndolo de otros coronavirus.
- Las estructuras cryo-EM revelaron el ectodominio trímero de la proteína S del SARS-CoV-2.
- Los anticuerpos policlonales murinos contra el SARS-CoV S demostraron una potente inhibición de la entrada celular mediada por el SARS-CoV-2.
Conclusiones:
- Los hallazgos proporcionan un plan estructural para el diseño de vacunas e inhibidores contra el SARS-CoV-2.
- La presencia de un sitio de escisión de furin puede contribuir a la propagación eficiente del SARS-CoV-2.
- Los anticuerpos de neutralización cruzada dirigidos a los epítopos S conservados ofrecen una vía prometedora para las intervenciones terapéuticas y las estrategias de vacunación.
Palabras clave:
En el caso del SARS-CoV:En el caso del SARS-CoV-2anticuerposel coronavirusCrio-EManticuerpos neutralizantesGlicoproteína de picoReceptores viralesMás Videos Relacionados
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