Abstract:
:Type I natural killer T cells (NKT cells) are characterized by an invariant variable region 14-joining region 18 (V(α)14-J(α)18) T cell antigen receptor (TCR) α-chain and recognition of the glycolipid α-galactosylceramide (α-GalCer) restricted to the antigen-presenting molecule CD1d. Here we describe a population of α-GalCer-reactive NKT cells that expressed a canonical V(α)10-J(α)50 TCR α-chain, which showed a preference for α-glucosylceramide (α-GlcCer) and bacterial α-glucuronic acid-containing glycolipid antigens. Structurally, despite very limited TCRα sequence identity, the V(α)10 TCR-CD1d-α-GlcCer complex had a docking mode similar to that of type I TCR-CD1d-α-GalCer complexes, although differences at the antigen-binding interface accounted for the altered antigen specificity. Our findings provide new insight into the structural basis and evolution of glycolipid antigen recognition and have notable implications for the scope and immunological role of glycolipid-specific T cell responses.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Uldrich AP,Patel O,Cameron G,Pellicci DG,Day EB,Sullivan LC,Kyparissoudis K,Kjer-Nielsen L,Vivian JP,Cao B,Brooks AG,Williams SJ,Illarionov P,Besra GS,Turner SJ,Porcelli SA,McCluskey J,Smyth MJ,Rossjohn J,Godfrey DIdoi
10.1038/ni.2051subject
Has Abstractpub_date
2011-06-12 00:00:00pages
616-23issue
7eissn
1529-2908issn
1529-2916pii
ni.2051journal_volume
12pub_type
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