1KGC image
Deposition Date 2001-11-26
Release Date 2002-12-11
Last Version Date 2024-11-13
Entry Detail
PDB ID:
1KGC
Keywords:
IMMUNE SYSTEM
Title:
Immune Receptor
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.50 Å
R-Value Free:
0.23
R-Value Work:
0.21
Space Group:
P 21 21 21
1KGC validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:T-cell receptor alpha chain
Gene (Uniprot):TRAC
Chain IDs:A (auth: D)
Chain Length:206
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01848 Pfam ID:PF09291
Protein Blast
Polymer Type:polypeptide(L)
Molecule:T-cell receptor beta chain
Gene (Uniprot):TRBC1
Chain IDs:B (auth: E)
Chain Length:242
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01850 Pfam ID:PF07654
Primary Citation
The 1.5 A crystal structure of a highly selected antiviral T cell receptor provides evidence for a structural basis of immunodominance
STRUCTURE 10 1521 1532 (2002)
PMID: 12429093 DOI: 10.1016/S0969-2126(02)00878-X

Abstact

Despite a potential repertoire of >10(15) alphabeta T cell receptors (TcR), the HLA B8-restricted cytolytic T cell response to a latent antigen of Epstein-Barr virus (EBV) is strikingly limited in the TcR sequences that are selected. Even in unrelated individuals this response is dominated by a single highly restricted TcR clonotype that selects identical combinations of hypervariable Valpha, Vbeta, D, J, and N region genes. We have determined the 1.5 A crystal structure of this "public" TcR, revealing that five of the six hypervariable loops adopt novel conformations providing a unique combining site that contains a deep pocket predicted to overlay the HLA B8-peptide complex. The findings suggest a structural basis for the immunodominance of this clonotype in the immune response to EBV.

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Primary Citation of related structures
1KGC