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.
Original language | English |
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Pages (from-to) | 5921-5932 |
Journal | Bioorganic & Medicinal Chemistry |
Volume | 14 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2006 |
Bibliographical 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)
Subject classification (UKÄ)
- Immunology in the medical area
Free keywords
- amide bond
- rheumatoid arthritis
- T-cell
- glycopeptide
- collagen
- peptide mimetics
- isostere