24 and this study) provides a molecular basis for the requirement of glucosidase activity in the release of MHC class I proteins from TAP molecules
24 and this study) provides a molecular basis for the requirement of glucosidase activity in the release of MHC class I proteins from TAP molecules. I assembly intermediates in the ER and show that glycan processing is functionally coupled to release of MHC class I proteins from peptide transport molecules. Most major histocompatibility complex (MHC) class I proteins are expressed around the cell surface in association with 2 microglobulin (2m) molecules and processed peptides (1, 2). Assembly of MHC class I protein complexes occurs in the endoplasmic reticulum (ER) and is proposed to be initiated by association IkB alpha antibody of newly translated CYC116 (CYC-116) MHC class I heavy chains with calnexin (3, 4, 5, 6, 7), a lectin-like chaperone molecule (8, 9, 10). In the murine system, 2m proteins…