Abstract
The activation of T cells by the T cell antigen receptor (TCR) results in the formation of signaling protein complexes (signalosomes), the composition of which has not been analyzed at a systems level. Here, we isolated primary CD4+ T cells from 15 gene-targeted mice, each expressing one tagged form of a canonical protein of the TCR-signaling pathway. Using affinity purification coupled with mass spectrometry, we analyzed the composition and dynamics of the signalosomes assembling around each of the tagged proteins over 600 s of TCR engagement. We showed that the TCR signal-transduction network comprises at least 277 unique proteins involved in 366 high-confidence interactions, and that TCR signals diversify extensively at the level of the plasma membrane. Integrating the cellular abundance of the interacting proteins and their interaction stoichiometry provided a quantitative and contextual view of each documented interaction, permitting anticipation of whether ablation of a single interacting protein can impinge on the whole TCR signal-transduction network.
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Data availability
The data that support the findings of this study are available from the corresponding authors upon request. The mass spectrometry proteomics data have been deposited to the ProteomeXchange Consortium via the PRIDE partner repository (http://www.ebi.ac.uk/pride) with the dataset identifiers PXD012826, PXD007660 and PXD003972.
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Acknowledgements
We thank D. Mori, C. Wülfing (University of Bristol) and A. Zarubica for discussions and E. Bergot, S. Li, T. Chao, S. Durand and the late F. Danjan for technical help. This work was supported by CNRS, INSERM, the European Research Council (ERC) under FP7 program (grant agreement no. 322465 (INTEGRATE), to B.M.) and the European Union’s Horizon 2020 research and innovation program (grant agreement no. 787300 (BASILIC), to B.M.), Agence Nationale de la Recherche (BASILIC project, to M.M.), the MSDAVENIR Fund (to B.M.), the Investissement d’Avenir program of the French Ministry of Research ProFI (Proteomics French Infrastructure, ANR-10-INBS-08, to O.B.-S.), and PHENOMIN (French National Infrastructure for mouse Phenogenomics; ANR-10-INBS-07, to B.M.), the National Natural Science Foundation of China (grant nos 81471595 and 31400759, to Y.L.) and the Education Department of Henan Province, China (16HASTIT030, to Y.L.) and by fellowships from the INTEGRATE (to M.G.M, G.V., K.K. and K.C.), MSDAVENIR (to Y.O.) and PHENOMIN (to L.G.) projects.
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Contributions
B.M., R.R. and G.V. conceived the project. B.M. and F.F supervised the construction of OST-tagged mice. R.R. and M.M. performed the experiments shown in Supplementary Figs. 1–3 with the help of L.G., Y.O. and M.G.M. K.K. characterized the SHIP1OST, PLC-γ1OST and PTPN6OST mice with the help of J.C. A.G.de P., K.C. and O.B.-S. performed the MS experiments. G.V. designed the computational and bioinformatics analysis. Y.L., M.M., H.L. and B.M designed the experiments shown in Fig. 8 and L.L., L.Z. and H.W. performed them. B.M., G.V. and R.R. wrote the manuscript.
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Supplementary Information
Supplementary Figs. 1–6, Tables 1 and 2 and Notes 1–4.
Supplementary Dataset 1
List of the bait–prey interactions identified in the present study. In the tab ‘bait–prey interactions’, each line shows an interaction between a bait and a prey and includes the corresponding FDRs, enrichments and stoichiometries before stimulation and at each stimulation time point. Cellular abundances (number of copies per cell) of the listed proteins are also specified. Where applicable, protein–protein interactions identified in public databases are indicated with the corresponding references and detection methods. The lists of the high-confidence bait–prey interactions identified for each bait are also shown in tabs CBL to VAV1.
Supplementary Dataset 2
Proteome of antigen-experienced conventional CD4+ T cells. The proteins identified in CD4+ T cells from wild-type and OST-tagged mice and their cellular abundance (number of copies per cell) are shown (see Methods).
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Voisinne, G., Kersse, K., Chaoui, K. et al. Quantitative interactomics in primary T cells unveils TCR signal diversification extent and dynamics. Nat Immunol 20, 1530–1541 (2019). https://doi.org/10.1038/s41590-019-0489-8
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DOI: https://doi.org/10.1038/s41590-019-0489-8
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