| Autor: |
Jodie Lopez, Amina Bittame, Céline Massera, Virginie Vasseur, Grégory Effantin, Anne Valat, Célia Buaillon, Sophie Allart, Barbara A. Fox, Leah M. Rommereim, David J. Bzik, Guy Schoehn, Winfried Weissenhorn, Jean-François Dubremetz, Jean Gagnon, Corinne Mercier, Marie-France Cesbron-Delauw, Nicolas Blanchard |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Cell Reports, Vol 13, Iss 10, Pp 2273-2286 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
2211-1247 |
| DOI: |
10.1016/j.celrep.2015.11.001 |
| Popis: |
Apicomplexa parasites such as Toxoplasma gondii target effectors to and across the boundary of their parasitophorous vacuole (PV), resulting in host cell subversion and potential presentation by MHC class I molecules for CD8 T cell recognition. The host-parasite interface comprises the PV limiting membrane and a highly curved, membranous intravacuolar network (IVN) of uncertain function. Here, using a cell-free minimal system, we dissect how membrane tubules are shaped by the parasite effectors GRA2 and GRA6. We show that membrane association regulates access of the GRA6 protective antigen to the MHC I pathway in infected cells. Although insertion of GRA6 in the PV membrane is key for immunogenicity, association of GRA6 with the IVN limits presentation and curtails GRA6-specific CD8 responses in mice. Thus, membrane deformations of the PV regulate access of antigens to the MHC class I pathway, and the IVN may play a role in immune modulation. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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