ER quality control in the biogenesis of MHC class I molecules.
Semin Cell Dev Biol
; 21(5): 512-9, 2010 Jul.
Article
en En
| MEDLINE
| ID: mdl-20044014
ABSTRACT
Class I molecules of the major histocompatibility complex play a vital role in cellular immunity, reporting on the presence of viral or tumor-associated antigens by binding peptide fragments of these proteins and presenting them to cytotoxic T cells at the cell surface. The folding and assembly of class I molecules is assisted by molecular chaperones and folding catalysts that comprise the general ER quality control system which also monitors the integrity of the process, disposing of misfolded class I molecules through ER associated degradation (ERAD). Interwoven with general ER quality control are class I-specific components such as the peptide transporter TAP and the tapasin-ERp57 chaperone complex that supply peptides and monitor their loading onto class I molecules. This ensures that at the cell surface class I molecules will possess mainly optimal peptides with a long half-life. In this review we discuss these processes as well as a number of strategies that viruses have evolved to subvert normal class I assembly within the ER and thereby evade immune recognition by cytotoxic T cells.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Antígenos de Histocompatibilidad Clase I
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Semin Cell Dev Biol
Asunto de la revista:
EMBRIOLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Canadá
Pais de publicación:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM