Synthetic peptides anchor T cell-specific TNP epitopes to MHC antigens.

Several TNP-specific, H-2Kb-restricted mouse CTL clones were identified which specifically lysed target cells in the presence of tryptic digests of TNP-modified BSA. Glutaraldehyde fixation of cells revealed that the tryptic fragments did not require further cellular processing. Chromatographic fractionation of digested TNP-BSA identified the peptide TNP-BSA222-231, containing a TNP-modified lysine at BSA position 227, as the antigenic entity. The corresponding synthetic peptide was immunologically cross-reactive with the digest. All clones reactive with TNP-BSA222-231 cross-reacted with a similar peptide from mouse serum albumin (TNP-MSA126-135), favoring the assumption that TNP-BSA222-231 represents an artificial determinant, cross-reacting with some as yet unidentified, TNP-modified, Kb-associated self-peptides. Some of our clones also cross-reacted with tryptic digests of TNP-OVA or TNP-keyhole limpet hemocyanin. We interpret these findings to indicate that 1) a significant proportion of hapten (TNP) determinants for T cells are anchored to MHC via peptides; and 2) the amino acid sequence of these peptides may only partly define the specificity of the T cell-relevant hapten epitope, implying a particularly repetitive nature of these determinants. The production of T cell-antigenic hapten-peptide conjugates will hopefully open new roads to study immune responses to environmental allergens.

• Publication year

  1992

• Venue

  Journal of Immunology

• Publication date

  1992-03-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.4049/jimmunol.148.5.1445PMID 1371527
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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