Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding
Abstract
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 contact site. 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. In conclusion, 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.
- Authors:
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1563054
- Alternate Identifier(s):
- OSTI ID: 1471537
- Grant/Contract Number:
- AC02-76SF00515; 5 T32 AI07290; F31 CA216926-01; U19 AI57229; R01 AI103867; R01AI096879; R01 NS071518; PO1 A1091580; NCI 1U54 CA199090-01; GRFP; EFRI-ODISSEI 1332411; WT101609MA; P41GM103393; 331 ACI-1548562
- Resource Type:
- Published Article
- Journal Name:
- Cell
- Additional Journal Information:
- Journal Name: Cell Journal Volume: 174 Journal Issue: 3; Journal ID: ISSN 0092-8674
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; TCR; MHC; ligand discrimination; catch bond; signaling; structure; CD45; molecular dynamics
Citation Formats
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, III, William A., Heath, James R., Evavold, Brian D., Vale, Ronald D., and Garcia, K. Christopher. Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding. United States: N. p., 2018.
Web. doi:10.1016/j.cell.2018.06.017.
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, III, William A., Heath, James R., Evavold, Brian D., Vale, Ronald D., & Garcia, K. Christopher. Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding. United States. https://doi.org/10.1016/j.cell.2018.06.017
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, III, William A., Heath, James R., Evavold, Brian D., Vale, Ronald D., and Garcia, K. Christopher. Sun .
"Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding". United States. https://doi.org/10.1016/j.cell.2018.06.017.
@article{osti_1563054,
title = {Isolation of a Structural Mechanism for Uncoupling T Cell Receptor Signaling from Peptide-MHC Binding},
author = {Sibener, Leah V. and Fernandes, Ricardo A. and Kolawole, Elizabeth M. and Carbone, Catherine B. and Liu, Fan and McAffee, Darren and Birnbaum, Michael E. and Yang, Xinbo and Su, Laura F. and Yu, Wong and Dong, Shen and Gee, Marvin H. and Jude, Kevin M. and Davis, Mark M. and Groves, Jay T. and Goddard, III, William A. and Heath, James R. and Evavold, Brian D. and Vale, Ronald D. and Garcia, K. Christopher},
abstractNote = {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 contact site. 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. In conclusion, 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.},
doi = {10.1016/j.cell.2018.06.017},
journal = {Cell},
number = 3,
volume = 174,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 2018},
month = {Sun Jul 01 00:00:00 EDT 2018}
}
https://doi.org/10.1016/j.cell.2018.06.017
Web of Science
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