Evidence map›Paper›PMID 33468649›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Structurally silent peptide anchor modifications allosterically modulate T cell recognition in a receptor-dependent manner.

Angela R Smith, Jesus A Alonso, Cory M Ayres, Nishant K Singh, Lance M Hellman, Brian M Baker

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.0field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 36 citations in OpenAlex.

  1. HLA micropolymorphisms confine neoantigen conformational adaptability and guide T cell receptor selectivity.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Review
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  6. Molecular Insights into Tumor Immunogenicity.Current issues in molecular biology · 2025
    Article
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  12. Review
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  15. Review
  16. SARS-CoV-2 spike does not interact with the T cell receptor or directly activate T cells.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  17. Article
  18. Tumor-Derived Antigenic Peptides as Potential Cancer Vaccines.International journal of molecular sciences · 2024
    Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Angela R SmithDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556.
Jesus A AlonsoDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556.
Cory M AyresDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556.
Nishant K SinghDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556.
Lance M HellmanDepartment of Physical and Life Sciences, Nevada State College, Henderson, NV 89002.
Brian M BakerDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556; brian-baker@nd.edu.ORCID https://orcid.org/0000-0002-0864-0964
University of Notre Dame · USNevada State University · US

Funding

Structural biophysics and molecular design in cellular immunityR35GM118166 · NIGMS · UNIVERSITY OF NOTRE DAME · PI BAKER, BRIAN M · 2016 to 2025
$4.4M
Phase II SER-CAT Optimization: Acquisition of a next generation area detectorS10RR028976 · NCRR · UNIVERSITY OF GEORGIA · PI WANG, BI-CHENG · 2010 to 2010
$1.5M
Acquition of a microdiffractometer for SER-CATS10RR025528 · NCRR · UNIVERSITY OF GEORGIA · PI ROSE, JOHN PATRICK · 2009 to 2009
$414k
NCRR NIH HHS S10 RR025528NCRR NIH HHS S10 RR028976NIGMS NIH HHS R35 GM118166
6 · The paper itself

Abstract

Presentation of peptides by class I MHC proteins underlies T cell immune responses to pathogens and cancer. The association between peptide binding affinity and immunogenicity has led to the engineering of modified peptides with improved MHC binding, with the hope that these peptides would be useful for eliciting cross-reactive immune responses directed toward their weak binding, unmodified counterparts. Increasing evidence, however, indicates that T cell receptors (TCRs) can perceive such anchor-modified peptides differently than wild-type (WT) peptides, although the scope of discrimination is unclear. We show here that even modifications at primary anchors that have no discernible structural impact can lead to substantially stronger or weaker T cell recognition depending on the TCR. Surprisingly, the effect of peptide anchor modification can be sensed by a TCR at regions distant from the site of modification, indicating a through-protein mechanism in which the anchor residue serves as an allosteric modulator for TCR binding. Our findings emphasize caution in the use and interpretation of results from anchor-modified peptides and have implications for how anchor modifications are accounted for in other circumstances, such as predicting the immunogenicity of tumor neoantigens. Our data also highlight an important need to better understand the highly tunable dynamic nature of class I MHC proteins and the impact this has on various forms of immune recognition.

Indexed as

Allosteric RegulationBinding SitesCloning, MolecularCrystallography, X-RayEscherichia coliGene ExpressionGenetic VectorsHLA-A2 AntigenHumansJurkat CellsKineticsModels, MolecularPeptidesProtein BindingProtein Conformation, alpha-HelicalProtein Conformation, beta-StrandHLA-A2 AntigenPeptidesReceptors, Antigen, T-Cell, alpha-betaRecombinant ProteinsallosterybindingMHCmolecular dynamicsT cell receptor

Identifiers

PMID33468649
PMCPMC7848747
OpenAlexW3124048010

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.