Codification of bidentate pMHC interaction with TCR and its co-receptor.
Trends Immunol
; 36(5): 300-6, 2015 May.
Article
em En
| MEDLINE
| ID: mdl-25818864
ABSTRACT
A 1983 Immunology Today rostrum hypothesized that each T cell has two recognition units a T cell receptor (TCR) complex, which binds antigen associated with a polymorphic region of a MHC molecule (pMHC), and a CD4 or CD8 molecule that binds to a conserved region of that same MHC gene product (class II or I, respectively). Structural biology has since precisely revealed those bidentate pMHC interactions. TCRαß ligates the membrane-distal antigen-binding MHC platform, whereas CD8 clamps a membrane-proximal MHCI α3 domain loop and CD4 docks to a hydrophobic crevice between MHCII α2 and ß2 domains. Here, we review how MHC class-restricted binding impacts signaling and lineage commitment, discussing TCR force-driven conformational transitions that may optimally expose the co-receptor docking site on MHC.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Receptores de Antígenos de Linfócitos T
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Antígenos de Histocompatibilidade
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Complexo Principal de Histocompatibilidade
Limite:
Animals
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Humans
Idioma:
En
Revista:
Trends Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2015
Tipo de documento:
Article