SARS-CoV-2 Nsp13 encodes for an HLA-E-stabilizing peptide that abrogates inhibition of NKG2A-expressing NK cells.
Cell Rep
; 38(10): 110503, 2022 03 08.
Article
en En
| MEDLINE
| ID: mdl-35235832
ABSTRACT
Natural killer (NK) cells are innate immune cells that contribute to host defense against virus infections. NK cells respond to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in vitro and are activated in patients with acute coronavirus disease 2019 (COVID-19). However, by which mechanisms NK cells detect SARS-CoV-2-infected cells remains largely unknown. Here, we show that the Non-structural protein 13 of SARS-CoV-2 encodes for a peptide that is presented by human leukocyte antigen E (HLA-E). In contrast with self-peptides, the viral peptide prevents binding of HLA-E to the inhibitory receptor NKG2A, thereby rendering target cells susceptible to NK cell attack. In line with these observations, NKG2A-expressing NK cells are particularly activated in patients with COVID-19 and proficiently limit SARS-CoV-2 replication in infected lung epithelial cells in vitro. Thus, these data suggest that a viral peptide presented by HLA-E abrogates inhibition of NKG2A+ NK cells, resulting in missing self-recognition.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Células Asesinas Naturales
/
Antígenos de Histocompatibilidad Clase I
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Proteínas no Estructurales Virales
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ARN Helicasas
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Subfamília C de Receptores Similares a Lectina de Células NK
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SARS-CoV-2
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COVID-19
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Metiltransferasas
Límite:
Humans
Idioma:
En
Revista:
Cell Rep
Año:
2022
Tipo del documento:
Article