Chaperones and folding of MHC class I molecules in the endoplasmic reticulum.
In this review we discuss the influence of chaperones on the general phenomena of folding as well as on the specific folding of an individual protein, MHC class I. MHC class I maturation is a highly sophisticated process in which the folding machinery of the endoplasmic reticulum (ER) is heavily involved. Understanding the MHC class I maturation per se is important since peptides loaded onto MHC class I molecules are the base for antigen presentation generating immune responses against virus, intracellular bacteria as well as tumours. This review discusses the early stages of MHC class I maturation regarding BiP and calnexin association, and differences in MHC class I heavy chain (HC) interaction with calnexin and calreticulin are highlighted. Late stage MHC class I maturation with focus on the dedicated chaperone tapasin is also discussed.
Paulsson
Kajsa
K
The Institution of Tumour Immunology, Lund University, BMC I12, S-223 62, Lund, Sweden. kajsa.paulsson@wblab.lu.se
Wang
Ping
P
D000818:Animals; D017951:Antigen Presentation; D017920:Antiporters / Q000378:metabolism; D037281:Calnexin / Q000378:metabolism; D037282:Calreticulin / Q000378:metabolism; D004721:Endoplasmic Reticulum / Q000276:immunology / Q000378:metabolism*; D015395:Histocompatibility Antigens Class I / Q000737:chemistry*; D006801:Humans; D007136:Immunoglobulins / Q000378:metabolism; D026901:Membrane Transport Proteins; D008954:Models, Biological; D018832:Molecular Chaperones / Q000378:metabolism*; D018995:Myosin Heavy Chains / Q000378:metabolism; D017510:Protein Folding
D017920:Antiporters; D037282:Calreticulin; D015395:Histocompatibility Antigens Class I; D007136:Immunoglobulins; D026901:Membrane Transport Proteins; D018832:Molecular Chaperones; C107762:tapasin; D037281:Calnexin; D018995:Myosin Heavy Chains