期刊
MOLECULAR IMMUNOLOGY
卷 39, 期 3-4, 页码 181-202出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0161-5890(02)00101-3
关键词
antigen degradation; MHC class I molecules; classical and non-classical pathways; cross priming; antigen presentation; polymorphism
Major histocompatibility complex (MHC) class I molecules usually present endogenous peptides at the cell surface. This is the result of a cascade of events involving various dedicated proteins like the peptide transporter associated with antigen processing (TAP) and the ER chaperone tapasin. However, alternative ways for class I peptide loading exist which may be highly relevant in a process called cross-priming. Both pathways are described here in detail. One major difference between these pathways is that the proteases involved in the generation of peptides are different. How proteases and peptidases influence peptide generation and degradation will be discussed. These processes determine the amount of peptides available for TAP translocation and class I binding and ultimately the immune response. (C) 2002 Elsevier Science Ltd. All rights reserved.
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