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The proteasome inhibitor lactacystin prevents the generation of an endoplasmic reticulum leader-derived T cell epitope


Gallimore, A; Schwarz, K; van den Broek, M; Hengartner, H; Groettrup, M (1998). The proteasome inhibitor lactacystin prevents the generation of an endoplasmic reticulum leader-derived T cell epitope. Molecular Immunology, 35(10):581-91.

Abstract

The presentation of viral antigens on MHC class I molecules requires their intracellular fragmentation into peptides of appropriate length and anchor residue positions. Evidence has accumulated that the proteasome is the endoprotease in charge of the generation of MHC class I ligands in the cytoplasm. The generation of T cell epitopes derived from the leader peptides of endoplasmic reticulum (ER) targeted proteins, however. has been reported to be independent of the proteasome. Here we show that the H-2Db restricted antigen presentation of the immunodominant T cell epitope derived from the ER leader of the glycoprotein of lymphocytic choriomeningitis virus (LCMV) is completely abolished by administration of the proteasome inhibitor lactacystin. Thus our data support the role of the proteasome in class I restricted antigen processing and extend it to an ER leader derived epitope from a viral glycoprotein.

Abstract

The presentation of viral antigens on MHC class I molecules requires their intracellular fragmentation into peptides of appropriate length and anchor residue positions. Evidence has accumulated that the proteasome is the endoprotease in charge of the generation of MHC class I ligands in the cytoplasm. The generation of T cell epitopes derived from the leader peptides of endoplasmic reticulum (ER) targeted proteins, however. has been reported to be independent of the proteasome. Here we show that the H-2Db restricted antigen presentation of the immunodominant T cell epitope derived from the ER leader of the glycoprotein of lymphocytic choriomeningitis virus (LCMV) is completely abolished by administration of the proteasome inhibitor lactacystin. Thus our data support the role of the proteasome in class I restricted antigen processing and extend it to an ER leader derived epitope from a viral glycoprotein.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Experimental Immunology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:July 1998
Deposited On:08 Feb 2018 15:20
Last Modified:20 Feb 2018 08:10
Publisher:Elsevier
ISSN:0161-5890
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/S0161-5890(98)00053-4
PubMed ID:9823757

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