A class of γδ T cell receptors recognize the underside of the antigen-presenting molecule MR1.
Science
; 366(6472): 1522-1527, 2019 12 20.
Article
en En
| MEDLINE
| ID: mdl-31857486
T cell receptors (TCRs) recognize antigens presented by major histocompatibility complex (MHC) and MHC class I-like molecules. We describe a diverse population of human γδ T cells isolated from peripheral blood and tissues that exhibit autoreactivity to the monomorphic MHC-related protein 1 (MR1). The crystal structure of a γδTCR-MR1-antigen complex starkly contrasts with all other TCR-MHC and TCR-MHC-I-like complex structures. Namely, the γδTCR binds underneath the MR1 antigen-binding cleft, where contacts are dominated by the MR1 α3 domain. A similar pattern of reactivity was observed for diverse MR1-restricted γδTCRs from multiple individuals. Accordingly, we simultaneously report MR1 as a ligand for human γδ T cells and redefine the parameters for TCR recognition.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Antígenos de Histocompatibilidad Clase I
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Antígenos de Histocompatibilidad Menor
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Receptores de Antígenos de Linfocitos T gamma-delta
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Presentación de Antígeno
Límite:
Humans
Idioma:
En
Revista:
Science
Año:
2019
Tipo del documento:
Article
País de afiliación:
Australia