2ICW image
Deposition Date 2006-09-13
Release Date 2007-03-20
Last Version Date 2024-11-13
Entry Detail
PDB ID:
2ICW
Keywords:
IMMUNE SYSTEM
Title:
Crystal structure of a complete ternary complex between TCR, superantigen, and peptide-MHC class II molecule
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Mycoplasma arthritidis (Taxon ID: 2111)
Mus musculus (Taxon ID: 10090)
(Taxon ID: )
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.41 Å
R-Value Free:
0.28
R-Value Work:
0.24
R-Value Observed:
0.24
Space Group:
P 1
2ICW validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:HLA class II histocompatibility antigen, DR alpha chain
Gene (Uniprot):HLA-DRA
Chain IDs:A, D
Chain Length:179
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P01903 Pfam ID:PF00993, PF07654
Protein Blast
Polymer Type:polypeptide(L)
Molecule:HLA class II histocompatibility antigen, DRB1-1 beta chain
Chain IDs:B, E
Chain Length:190
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P01911 Pfam ID:PF00969, PF07654
Polymer Type:polypeptide(L)
Molecule:haemagglutinin peptide
Chain IDs:C, F
Chain Length:13
Number of Molecules:2
Biological Source:
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mycoplasma arthritidis mitogen
Chain IDs:G, H
Chain Length:213
Number of Molecules:2
Biological Source:Mycoplasma arthritidis
UniProt ID:Q48898 Pfam ID:PF09245
Protein Blast
Polymer Type:polypeptide(L)
Molecule:T-cell receptor alpha chain V
Mutations:W82R, L43P
Chain IDs:I, K
Chain Length:110
Number of Molecules:2
Biological Source:Mus musculus
UniProt ID:P01738 Pfam ID:PF07686
Protein Blast
Polymer Type:polypeptide(L)
Molecule:T-cell receptor beta chain V
Mutations:G17E, G42E, L80S
Chain IDs:J, L
Chain Length:113
Number of Molecules:2
Biological Source:Mus musculus
UniProt ID:A2NTY6 Pfam ID:PF07686
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET SELENOMETHIONINE
Primary Citation
Crystal structure of a complete ternary complex of TCR, superantigen and peptide-MHC.
Nat.Struct.Mol.Biol. 14 169 171 (2007)
PMID: 17220897 DOI: 10.1038/nsmb1193

Abstact

'Superantigens' (SAgs) trigger the massive activation of T cells by simultaneous interactions with MHC and TCR receptors, leading to human diseases. Here we present the first crystal structure, at 2.5-A resolution, of a complete ternary complex between a SAg and its two receptors, HLA-DR1/HA and TCR. The most striking finding is that the SAg Mycoplasma arthritidis mitogen, unlike others, has direct contacts not only with TCR Vbeta but with TCR Valpha.

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Disease

Primary Citation of related structures
2ICW