Abstract
Proteasomes are the proteolytic complex responsible for major histocompatibility complex (MHC) class I-restricted antigen presentation. Interferon γ treatment increases expression of MHC-encoded LMP2 and LMP7 subunits of the proteasome and decreases expression of two proteasome subunits, named X and Y, which alters the proteolytic specificity of proteasomes. Molecular cloning of complementary DNAs encoding X and Y showed that their proteins are proteasomal subunits with high amino acid similarity to LMP7 and LMP2, respectively. Thus, interferon γ may induce subunit replacements of X and Y by LMP7 and LMP2, respectively, producing proteasomes perhaps more appropriate for the immunological processing of endogenous antigens.
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@article{Akiyama_1994, title={cDNA Cloning and Interferon γ Down-Regulation of Proteasomal Aubunits X and Y}, volume={265}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.8066462}, DOI={10.1126/science.8066462}, number={5176}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Akiyama, Kin-ya and Yokota, Kim-ya and Kagawa, Susumu and Shimbara, Naoki and Tamura, Tomohiro and Akioka, Hiroshi and Nothwang, Hans G. and Noda, Chiseko and Tanaka, Keiji and Ichihara, Akira}, year={1994}, month=aug, pages={1231–1234} }