Human coronavirus HKU1 recognition of the TMPRSS2 host receptor.
Cell
; 187(16): 4231-4245.e13, 2024 Aug 08.
Article
em En
| MEDLINE
| ID: mdl-38964328
ABSTRACT
The human coronavirus HKU1 spike (S) glycoprotein engages host cell surface sialoglycans and transmembrane protease serine 2 (TMPRSS2) to initiate infection. The molecular basis of HKU1 binding to TMPRSS2 and determinants of host receptor tropism remain elusive. We designed an active human TMPRSS2 construct enabling high-yield recombinant production in human cells of this key therapeutic target. We determined a cryo-electron microscopy structure of the HKU1 RBD bound to human TMPRSS2, providing a blueprint of the interactions supporting viral entry and explaining the specificity for TMPRSS2 among orthologous proteases. We identified TMPRSS2 orthologs from five mammalian orders promoting HKU1 S-mediated entry into cells along with key residues governing host receptor usage. Our data show that the TMPRSS2 binding motif is a site of vulnerability to neutralizing antibodies and suggest that HKU1 uses S conformational masking and glycan shielding to balance immune evasion and receptor engagement.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Serina Endopeptidases
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Microscopia Crioeletrônica
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Internalização do Vírus
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Glicoproteína da Espícula de Coronavírus
Limite:
Animals
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Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article