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Cited by 311

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Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding

Open access
Sibener, Leah V., Fernandes, Ricardo A., Kolawole, Elizabeth M., Carbone, Catherine B., Liu, Fan, McAffee, Darren, Birnbaum, Michael E., Yang, Xinbo, Su, Laura F., Yu, Wong, Dong, Shen, Gee, Marvin H., Jude, Kevin M., Davis, Mark M., Groves, Jay T., Goddard, William A., Heath, James R., Evavold, Brian D., Vale, Ronald D., Garcia, K. Christopher·2018·Cell

Abstract

Summary TCR signaling strength generally correlates with peptide-MHC binding affinity; however, exceptions exist. We find high-affinity, yet non-stimulatory interactions occur with high frequency in the human T cell repertoire. Here, we studied human TCRs that are refractory to activation by pMHC ligands despite robust binding. Analysis of 3D affinity, 2D dwell-time, and crystal structures of stimulatory versus non-stimulatory TCR-pMHC interactions failed to account for their different signaling outcomes. Using yeast pMHC display, we identified peptide agonists of a formerly non-responsive TCR. Single-molecule force measurements demonstrated the emergence of catch-bonds in the activating TCR-pMHC interactions, correlating with exclusion of CD45 from the TCR-APC synapse. Molecular dynamics simulations of TCR-pMHC disengagement distinguished agonist from non-agonist ligands based on the acquisition of catch bonds within the TCR-pMHC interface. The isolation of catch bonds as a parameter mediating the coupling of TCR binding and signaling has important implications for TCR and antigen engineering for immunotherapy.

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Metadata

Authors
Sibener, L. V., Fernandes, R. A., Kolawole, E. M., Carbone, C. B., Liu, F., McAffee, D., Birnbaum, M. E., Yang, X., Su, L. F., Yu, W., Dong, S., Gee, M. H., Jude, K. M., Davis, M. M., Groves, J. T., Goddard, W. A., Heath, J. R., Evavold, B. D., Vale, R. D., & Garcia, K. C.
Venue
Cell
Publisher
Elsevier BV
Published
2018-07
Volume
174
Issue
3
Pages
672-687.e27
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2884809460
Cited by
311
References
5
FWCI
11.08
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding. https://app.cochat.ai/papers/10.1016/j.cell.2018.06.017
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Sibener, L. V., Fernandes, R. A., Kolawole, E. M., Carbone, C. B., Liu, F., McAffee, D., Birnbaum, M. E., Yang, X., Su, L. F., Yu, W., Dong, S., Gee, M. H., Jude, K. M., Davis, M. M., Groves, J. T., Goddard, W. A., Heath, J. R., Evavold, B. D., Vale, R. D., & Garcia, K. C. (2018). Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding. Cell. https://doi.org/10.1016/j.cell.2018.06.017

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.