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Structural and functional analyses of the interaction of tetherin with the dendritic cell receptor ILT7

Abstract : Human immunodeficiency virus 1 (HIV-1) specifically infects CD4+ T cells, thereby preventing an appropriate activation of cytotoxic T cells and B cells in response to opportunistic pathogens. In addition, HIV-1 antagonises host restriction factors, including tetherin. In the absence of the viral protein Vpu, tetherin potently inhibits virus particle release from infected cells. Tetherin also triggers proinflammatory signaling upon sensing virus assembly, and activates the dendritic cell receptor ILT7. The principal objective of this thesis was to elucidate the structural details underlying the interaction of tetherin with ILT7. Despite difficulties in the production of recombinant ILT7, the crystal structure of the N-terminal ILT7 domain could be determined. Furthermore, binding of tetherin to full-length ILT7, but not to the N-terminal domain, could be confirmed by SPR. These results provide a solid basis for the more detailed characterisation of the interaction.
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Nicolas Aschman. Structural and functional analyses of the interaction of tetherin with the dendritic cell receptor ILT7. Biomolecules [q-bio.BM]. Université Grenoble Alpes, 2015. English. ⟨NNT : 2015GREAV064⟩. ⟨tel-01682995⟩

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