Side-chain and backbone amide bond requirements for glycopeptide stimulation of T-cells obtained in a mouse model for rheumatoid arthritis

Research output: Contribution to journalArticle

Abstract

Collagen induced arthritis (CIA) is the most studied animal model for rheumatoid arthritis and is associated with the MHC class II molecule A(q). T-cell recognition of a peptide from type II collagen, C11256-270, bound to A(q) is a requirement for development of CIA. Lysine 264 is the major T-cell recognition site of C11256-270 and CIA is in particular associated with recognition of lysine 264 after posttranslational hydroxylation and subsequent attachment of a beta-D-galactopyranosyl moiety. In this paper we have studied the structural requirements of collagenous glycopeptides required for T-cell stimulation, as an extension of earlier studies of the recognition of the galactose moiety. Synthesis and evaluation of alanine substituted glycopeptides revealed that there are T-cells that only recognise the galactosylated hydroxylysine 264, and no other amino acid side chains in the peptide. Other T-cells also require glutamic acid 266 as a T-cell contact point. Introduction of a methylene ether isostere instead of the amide bond between residues 260 and 261 allowed weaker recognition by some, but not all, of the T-cells. Altogether, these results allowed us to propose a model for glycopeptide recognition by the T-cells, where recognition from one or the other side of the galactose moiety could explain the different binding patterns of the T-cells. (c) 2006 Elsevier Ltd. All rights reserved.

Details

Authors
  • Lotta Holm
  • Robert Bockermann
  • Erik Wellner
  • Johan Bäcklund
  • Rikard Holmdahl
  • Jan Kihlberg
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Immunology in the medical area

Keywords

  • amide bond, rheumatoid arthritis, T-cell, glycopeptide, collagen, peptide mimetics, isostere
Original languageEnglish
Pages (from-to)5921-5932
JournalBioorganic & Medicinal Chemistry
Volume14
Issue number17
Publication statusPublished - 2006
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Medical Inflammation Research (013212019)