4LFH image
Entry Detail
PDB ID:
4LFH
Keywords:
Title:
Crystal Structure of 9C2 TCR
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2013-06-26
Release Date:
2013-10-02
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 42 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:9C2 TCR delta chain
Chain IDs:A (auth: D)
Chain Length:236
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:9C2 TCR gamma chain
Chain IDs:B (auth: G)
Chain Length:251
Number of Molecules:1
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Primary Citation
CD1d-lipid antigen recognition by the gamma delta TCR.
Nat.Immunol. 14 1137 1145 (2013)
PMID: 24076636 DOI: 10.1038/ni.2713

Abstact

The T cell repertoire comprises αβ and γδ T cell lineages. Although it is established how αβ T cell antigen receptors (TCRs) interact with antigen presented by antigen-presenting molecules, this is unknown for γδ TCRs. We describe a population of human Vδ1(+) γδ T cells that exhibit autoreactivity to CD1d and provide a molecular basis for how a γδ TCR binds CD1d-α-galactosylceramide (α-GalCer). The γδ TCR docked orthogonally, over the A' pocket of CD1d, in which the Vδ1-chain, and in particular the germ line-encoded CDR1δ loop, dominated interactions with CD1d. The TCR γ-chain sat peripherally to the interface, with the CDR3γ loop representing the principal determinant for α-GalCer specificity. Accordingly, we provide insight into how a γδ TCR binds specifically to a lipid-loaded antigen-presenting molecule.

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Primary Citation of related structures