Sulfatide derived from the myelin stimulates a distinct population of CD1d-restricted natural killer T (NKT) cells. Cis-tetracosenoyl sulfatide is one of the immunodominant species in myelin as identified by proliferation, cytokine secretion, and CD1d tetramer staining. The crystal structure of mouse CD1d in complex with cis-tetracosenoyl sulfatide at 1.9 Å resolution reveals that the longer cis-tetracosenoyl fatty acid chain fully occupies the A′ pocket of the CD1d binding groove, whereas the sphingosine chain fills up the F′ pocket. A precise hydrogen bond network in the center of the binding groove orients and positions the ceramide backbone for insertion of the lipid tails in their respective pockets. The 3′-sulfated galactose headgroup is highly exposed for presentation to the T cell receptor and projects up and away from the binding pocket due to its β linkage, compared with the more intimate binding of the α-glactosyl ceramide headgroup to CD1d. These structure and binding data on sulfatide presentation by CD1d have important implications for the design of therapeutics that target T cells reactive for myelin glycolipids in autoimmune diseases of the central nervous system.
Structural basis for CD1d presentation of a sulfatide derived from myelin and its implications for autoimmunity
D. Zajonc,I. Maričić,Douglass Wu,R. Halder,K. Roy,Chi‐Huey Wong,Vipin Kumar,I. Wilson
Published 2005 in Journal of Experimental Medicine
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- Publication year
2005
- Venue
Journal of Experimental Medicine
- Publication date
2005-12-05
- Fields of study
Biology, Medicine
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Semantic Scholar, PubMed
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