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the claim

MHC restricted peptides are recognized by T cell receptors only when bound to MHC molecules

the verdict

COMMON KNOWLEDGE

Legacy classification; evidence review pending

Recorded sources

8 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that MHC restricted peptides are recognized by T cell receptors only when bound to MHC molecules?

The claim that MHC-restricted peptides are recognized by T cell receptors only when bound to MHC molecules is a foundational immunological principle supported consistently across the literature.

Verdict: COMMON KNOWLEDGE · 8 sources for, 0 against · Last checked 6 Aug 2026

The analysis

The claim states a fundamental, textbook tenet of immunology regarding MHC restriction and TCR recognition of peptide-MHC complexes. While no citation is strictly needed for such foundational biological definitions (making COMMON_KNOWLEDGE the appropriate verdict), numerous retrieved papers discuss the structural and biophysical reality of TCRs recognizing peptides presented on MHC molecules, thereby fully supporting the statement.

Evidence for · 8

Structural basis of specificity and degeneracy of T cell recognition: pluriallelic restriction of T cell responses to a peptide antigen involves both specific and promiscuous interactions between the T cell receptor, peptide, and HLA-DR.

1998

Discusses TCR engagement of peptide-MHC class II ligands involving contacts with both MHC and peptide molecules.

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Doherty, D. G., Penzotti, J., Koelle, D., Kwok, W. W., Lybrand, T. P., Masewicz, S., & Nepom, G. T. (1998). Structural basis of specificity and degeneracy of T cell recognition: pluriallelic restriction of T cell responses to a peptide antigen involves both specific and promiscuous interactions between the T cell receptor, peptide, and HLA-DR.. doi.org. https://doi.org/10.4049/jimmunol.161.7.3527

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More for · 7

The basis for limited specificity and MHC restriction in a T cell receptor interface

2013

Examines how alpha-beta TCRs recognize peptides presented by MHC proteins.

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Piepenbrink, K., Blevins, S., Scott, D., & Baker, B. (2013). The basis for limited specificity and MHC restriction in a T cell receptor interface. doi.org. https://doi.org/10.1038/ncomms2948

Recombinant antibodies with MHC‐restricted, peptide‐specific, T‐cell receptor‐like specificity: new tools to study antigen presentation and TCR–peptide–MHC interactions

2003

Describes peptide-specific, MHC-restricted TCR-like molecules recognizing peptide-MHC complexes.

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Cohen, C. J., Denkberg, G., Lev, A., Epel, M., & Reiter, Y. (2003). Recombinant antibodies with MHC‐restricted, peptide‐specific, T‐cell receptor‐like specificity: new tools to study antigen presentation and TCR–peptide–MHC interactions. doi.org. https://doi.org/10.1002/jmr.640

Recognition of the Major Histocompatibility Complex Restriction Element Modulates CD8+ T Cell Specificity and Compensates for Loss of T Cell Receptor Contacts with the Specific Peptide

1999

Notes that triggering of a T cell requires interaction between its specific receptor and a peptide antigen presented by an MHC molecule.

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Sandberg, J., Kärre, K., & Glas, R. (1999). Recognition of the Major Histocompatibility Complex Restriction Element Modulates CD8+ T Cell Specificity and Compensates for Loss of  T Cell Receptor Contacts with the Specific Peptide. doi.org. https://doi.org/10.1084/jem.189.6.883

Fate of intercellular MHC–peptide–T‐cell receptor complexes during T‐cell activation

1995

Describes non-covalent intercellular bridges consisting of TCRs on T cells and cognate MHC-peptide complexes on APCs.

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Clark, B. R. (1995). Fate of intercellular MHC–peptide–T‐cell receptor complexes during T‐cell activation. doi.org. https://doi.org/10.1002/jmr.300080111

Targeting the pMHC-TCR Interaction: Molecular Strategies and Therapeutic Potential in Autoimmunity.

2026

Highlights the recognition of self-antigen peptide-MHC complexes by the TCR as a fundamental event.

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AM, N., AE, M., LA, O., & MY, Z. (2026). Targeting the pMHC-TCR Interaction: Molecular Strategies and Therapeutic Potential in Autoimmunity.. doi.org. https://doi.org/10.3390/ijms27083622

T Cell Receptor Recognition and the Composite Peptide/MHC Surface

2015

States that alphabeta T cell receptors recognize peptide antigens bound and presented by class I or class II MHC proteins.

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Baker, B. (2015). T Cell Receptor Recognition and the Composite Peptide/MHC Surface. doi.org. https://doi.org/10.1096/fasebj.29.1_supplement.223.1

Mapping the TCR landscape: computational tools empowering translational immunology and therapy design.

2026

Mentions structural modeling of TCRs and peptide-MHC complexes for predicting binding targets.

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P, B., M, V. d. F., J, Y., F, B., J, L., FJ, F. d. S., SH, C., DB, N., G, Z., JH, J., E, D., & H, A. (2026). Mapping the TCR landscape: computational tools empowering translational immunology and therapy design.. doi.org. https://doi.org/10.1136/jitc-2025-014184

What does the evidence say?

Receipt History

first checked06 Aug 2026

judged → COMMON KNOWLEDGE · 8706 Aug 2026

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