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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
no citation needed for this one
refutedsupported
the weight of evidence
8 sources for · 0 against

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.

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 · cited by 91
Discusses TCR engagement of peptide-MHC class II ligands involving contacts with both MHC and peptide molecules.
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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.

More for · 7
The basis for limited specificity and MHC restriction in a T cell receptor interface
2013 · cited by 48
Examines how alpha-beta TCRs recognize peptides presented by MHC proteins.
Recombinant antibodies with MHC‐restricted, peptide‐specific, T‐cell receptor‐like specificity: new tools to study antigen presentation and TCR–peptide–MHC interactions
2003 · cited by 48
Describes peptide-specific, MHC-restricted TCR-like molecules recognizing peptide-MHC complexes.
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 · cited by 22
Notes that triggering of a T cell requires interaction between its specific receptor and a peptide antigen presented by an MHC molecule.
Fate of intercellular MHC–peptide–T‐cell receptor complexes during T‐cell activation
1995 · cited by 4
Describes non-covalent intercellular bridges consisting of TCRs on T cells and cognate MHC-peptide complexes on APCs.
Targeting the pMHC-TCR Interaction: Molecular Strategies and Therapeutic Potential in Autoimmunity.
2026 · cited by 1
Highlights the recognition of self-antigen peptide-MHC complexes by the TCR as a fundamental event.
T Cell Receptor Recognition and the Composite Peptide/MHC Surface
2015 · cited by 1
States that alphabeta T cell receptors recognize peptide antigens bound and presented by class I or class II MHC proteins.
Mapping the TCR landscape: computational tools empowering translational immunology and therapy design.
2026 · cited by 0
Mentions structural modeling of TCRs and peptide-MHC complexes for predicting binding targets.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. 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, peppeer-reviewedsupports
  2. The basis for limited specificity and MHC restriction in a T cell receptor interfacepeer-reviewedsupports
  3. Recombinant antibodies with MHC‐restricted, peptide‐specific, T‐cell receptor‐like specificity: new tools to study antigen presentation and TCR–peptide–MHC interactionspeer-reviewedsupports
  4. Characterization of the immune response to a secondary encephalitogenic epitope of basic protein in Lewis rats. I. T cell receptor peptide regulation of T cell clones expressing cross-reactive V beta genes.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. 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 Peptidepeer-reviewedsupports
  6. The evolving T cell receptor recognition code: the rules are more like guidelinespeer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Fate of intercellular MHC–peptide–T‐cell receptor complexes during T‐cell activationpeer-reviewedsupports
  8. Targeting the pMHC-TCR Interaction: Molecular Strategies and Therapeutic Potential in Autoimmunity.peer-reviewedsupports
  9. T Cell Receptor Recognition and the Composite Peptide/MHC Surfacepeer-reviewedsupports
  10. Mapping the TCR landscape: computational tools empowering translational immunology and therapy design.peer-reviewedsupports
  11. HLA micropolymorphisms confine neoantigen conformational adaptability and guide T cell receptor selectivity.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. Nonclassical MHC-I Molecules: Emerging Therapeutic Targets in Next-Generation Immunotherapy.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked06 Aug 2026
judged → COMMON KNOWLEDGE · 8706 Aug 2026
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