ISDA

Entry Detail

PDB ID:

2CDE

Keywords:

Title:

Structure and binding kinetics of three different human CD1d-alpha- Galactosylceramide specific T cell receptors - iNKT-TCR

Biological Source:

Source Organism:

HOMO SAPIENS

Host Organism:

ESCHERICHIA COLI

PDB Version:

Deposition Date:

2006-01-23

Release Date:

2006-03-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.50 Å

R-Value Free:

0.35

R-Value Work:

0.28

R-Value Observed:

0.28

Space Group:

C 1 2 1

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Macromolecular Entities

Polymer Type:polypeptide(L)
Description:INKT-TCR
Chain IDs:A, C, E
Chain Length:192
Number of Molecules:3
Biological Source:HOMO SAPIENS

Protein Blast

Polymer Type:polypeptide(L)
Description:INKT-TCR
Chain IDs:B, D, F
Chain Length:244
Number of Molecules:3
Biological Source:HOMO SAPIENS

UniProt ID:P01850 Pfam ID:PF07654

Ligand Molecules

Primary Citation

Structrue and Binding Kinetics of Three Different Human Cd1D-Alpha-Galactosylceramide-Specific T Cell Receptors

Gadola, S.D, Koch, M, Marles-Wright, J, Lissin, N.M, Sheperd, D, Matulis, G, Harlos, K, Villiger, P.M, Stuart, D.I, Jakobsen, B.K, Cerundolo, V, Jones, E.Y.Show

J.Exp.Med. 203 699 ? (2006)

PMID: 16520393 DOI: 10.1084/JEM.20052369

Abstact

Invariant human TCR Valpha24-Jalpha18+/Vbeta11+ NKT cells (iNKT) are restricted by CD1d-alpha-glycosylceramides. We analyzed crystal structures and binding characteristics for an iNKT TCR plus two CD1d-alpha-GalCer-specific Vbeta11+ TCRs that use different TCR Valpha chains. The results were similar to those previously reported for MHC-peptide-specific TCRs, illustrating the versatility of the TCR platform. Docking TCR and CD1d-alpha-GalCer structures provided plausible insights into their interaction. The model supports a diagonal orientation of TCR on CD1d and suggests that complementarity determining region (CDR)3alpha, CDR3beta, and CDR1beta interact with ligands presented by CD1d, whereas CDR2beta binds to the CD1d alpha1 helix. This docking provides an explanation for the dominant usage of Vbeta11 and Vbeta8.2 chains by human and mouse iNKT cells, respectively, for recognition of CD1d-alpha-GalCer.

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Primary Citation of related structures