Cutting edge: Predictable TCR antigen recognition based on peptide scans leads to the identification of agonist ligands with no sequence homology

Bernhard Hemmer, Marco Vergelli, Bruno Gran, Nick Ling, Paul Conlon, Clemencia Pinilla, Richard Houghten, Henry F. McFarland, Roland Martin

Research output: Contribution to journalArticle

Abstract

The potential of CD4+ T cells for cross-recognition of self and foreign Ags has important implications for the understanding of thymic selection, lymphocyte survival, and the occurrence of autoimmune diseases. Here, we define the extensive flexibility of Ag recognition for three human CD4+ autoreactive T cell clones (TCC) by using ligands with single and multiple amino acid (aa) substitutions. Our results demonstrate that the spectrum of tolerated ligands and the resulting stimulatory potency of peptides for a TCC can be predicted by the relative influence of each aa. Using this approach, we have identified stimulatory ligands not sharing a single aa in corresponding positions with the Ag used to establish the TCC. These results argue for an independent contribution of each aa in the peptide sequence to the affinity of the MHC/peptide complex to the TCR.

Original languageEnglish (US)
Pages (from-to)3631-3636
Number of pages6
JournalJournal of Immunology
Volume160
Issue number8
StatePublished - Apr 15 1998
Externally publishedYes

ASJC Scopus subject areas

  • Immunology

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  • Cite this

    Hemmer, B., Vergelli, M., Gran, B., Ling, N., Conlon, P., Pinilla, C., Houghten, R., McFarland, H. F., & Martin, R. (1998). Cutting edge: Predictable TCR antigen recognition based on peptide scans leads to the identification of agonist ligands with no sequence homology. Journal of Immunology, 160(8), 3631-3636.