7N1C image
Entry Detail
PDB ID:
7N1C
Keywords:
Title:
SARS-CoV-2 RLQ peptide-specific TCR pRLQ3
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2021-05-27
Release Date:
2021-07-28
Method Details:
Experimental Method:
Resolution:
1.88 Å
R-Value Free:
0.23
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:pRLQ3 T cell receptor alpha chain
Chain IDs:A (auth: D)
Chain Length:204
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:pRLQ3 T cell receptor beta chain
Chain IDs:B (auth: E)
Chain Length:244
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structural assessment of HLA-A2-restricted SARS-CoV-2 spike epitopes recognized by public and private T-cell receptors.
Nat Commun 13 19 19 (2022)
PMID: 35013235 DOI: 10.1038/s41467-021-27669-8

Abstact

T cells play a vital role in combatting SARS-CoV-2 and forming long-term memory responses. Whereas extensive structural information is available on neutralizing antibodies against SARS-CoV-2, such information on SARS-CoV-2-specific T-cell receptors (TCRs) bound to their peptide-MHC targets is lacking. Here we determine the structures of a public and a private TCR from COVID-19 convalescent patients in complex with HLA-A2 and two SARS-CoV-2 spike protein epitopes (YLQ and RLQ). The structures reveal the basis for selection of particular TRAV and TRBV germline genes by the public but not the private TCR, and for the ability of the TCRs to recognize natural variants of RLQ but not YLQ. Neither TCR recognizes homologous epitopes from human seasonal coronaviruses. By elucidating the mechanism for TCR recognition of an immunodominant yet variable epitope (YLQ) and a conserved but less commonly targeted epitope (RLQ), this study can inform prospective efforts to design vaccines to elicit pan-coronavirus immunity.

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