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Review
. 2013 Feb;25(1):74-80.
doi: 10.1016/j.coi.2012.11.004. Epub 2012 Dec 6.

The immunoproteasome in antigen processing and other immunological functions

Michael Basler  1 , Christopher J Kirk, Marcus Groettrup
Affiliations
Review

The immunoproteasome in antigen processing and other immunological functions

Michael Basler et al. Curr Opin Immunol. 2013 Feb.

Abstract

Treatment of cells with interferon-γ leads to the replacement of the constitutive catalytic proteasome subunits β1, β2, and β5 by the inducible subunits LMP2 (β1i), MECL-1 (β2i), and LMP7 (β5i), respectively, building the so-called immunoproteasome. The incorporation of these subunits is required for the production of numerous MHC class-I restricted T cell epitopes. Recently, new evidence for an involvement of the immunoproteasome in other facets of the immune response emerged. Investigations of autoimmune diseases in animal models and a genetic predisposition of β5i in human autoimmune disorders suggest a crucial function of the immunoproteasome in proinflammatory diseases. The recent elucidation of the high-resolution structure of the immunoproteasome will facilitate the design of immunoproteasome selective inhibitors for pharmacological intervention.

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