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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 iScience 2021 ; 24 (2): 102096 Nephropedia Template TP
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The presentation of SARS-CoV-2 peptides by the common HLA-A( *)02:01 molecule #MMPMID33521593
Szeto C; Chatzileontiadou DSM; Nguyen AT; Sloane H; Lobos CA; Jayasinghe D; Halim H; Smith C; Riboldi-Tunnicliffe A; Grant EJ; Gras S
iScience 2021[Feb]; 24 (2): 102096 PMID33521593show ga
CD8+ T cells are crucial for anti-viral immunity; however, understanding T cell responses requires the identification of epitopes presented by human leukocyte antigens (HLA). To date, few SARS-CoV-2-specific CD8+ T cell epitopes have been described. Internal viral proteins are typically more conserved than surface proteins and are often the target of CD8+ T cells. Therefore, we have characterized eight peptides derived from the internal SARS-CoV-2 nucleocapsid protein predicted to bind HLA-A( *)02:01, the most common HLA molecule in the global population. We determined not all peptides could form a complex with HLA-A( *)02:01, and the six crystal structures determined revealed that some peptides adopted a mobile conformation. We therefore provide a molecular understanding of SARS-CoV-2 CD8+ T cell epitopes. Furthermore, we show that there is limited pre-existing CD8+ T cell response toward these epitopes in unexposed individuals. Together, these data show that SARS-CoV-2 nucleocapsid might not contain potent epitopes restricted to HLA-A( *)02:01.