Substrate-specific presentation of MHC class I-restricted antigens via autophagy pathway

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00209805%3A_____%2F22%3A00079008" target="_blank" >RIV/00209805:_____/22:00079008 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0008874922000089?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0008874922000089?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cellimm.2022.104484" target="_blank" >10.1016/j.cellimm.2022.104484</a>

Result language
angličtina
Original language name
Substrate-specific presentation of MHC class I-restricted antigens via autophagy pathway
Original language description
The accumulation of protein aggregates is toxic and linked to different diseases such as neurodegenerative disorders, but the role of the immune system to target and destroy aggregate-carrying cells is still relatively unknown. Here we show a substrate-specific presentation of antigenic peptides to the direct MHC class I pathway via autophagy. We observed no difference in presentation of peptides derived from the viral EBNA1 protein following suppression of autophagy by knocking down Atg5 and Atg12. However, the same knock down treatment suppressed the presentation from ovalbumin. Fusing the aggregate-prone poly-glutamine (PolyQ) to the ovalbumin had no effect on antigen presentation via autophagy. Interestingly, fusing the EBNA1-derived gly-ala repeat (GAr) sequence to ovalbumin rendered the presentation Atg5/12 independent. We also demonstrate that the relative levels of protein expression did not affect autophagy-mediated antigen presentation. These data suggest a substrate-dependent presentation of antigenic peptides for the MHC class I pathway via autophagy and indicate that the GAr of the EBNA1 illustrates a novel virus-mediated mechanism for immune evasion of autophagy-dependent antigen presentation.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology

Project
<a href="/en/project/EF16_019%2F0000868" target="_blank" >EF16_019/0000868: Molecular, cellular and clinical approach to healthy ageing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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