ISDA

Deposition Date 2002-11-28

Release Date 2003-03-11

Last Version Date 2024-11-20

Entry Detail

PDB ID:

1NAN

Keywords:

IMMUNE SYSTEM

Title:

MCH CLASS I H-2KB MOLECULE COMPLEXED WITH PBM1 PEPTIDE

Biological Source:

Source Organism:

Mus musculus (Taxon ID: 10090)
(Taxon ID: )

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.30 Å

R-Value Free:

0.27

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:H-2 class I histocompatibility antigen, K-B alpha chain
Gene (Uniprot):H2-K1
Chain IDs:A (auth: H), B (auth: L)
Chain Length:278
Number of Molecules:2
Biological Source:Mus musculus

UniProt ID:P01901 Pfam ID:PF00129, PF07654

Protein Blast

Polymer Type:polypeptide(L)
Molecule:pBM1 peptide
Chain IDs:E (auth: M), F (auth: Q)
Chain Length:8
Number of Molecules:2
Biological Source:

UniProt ID:Q8CDD8

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Beta-2-microglobulin
Gene (Uniprot):B2m
Chain IDs:C (auth: P), D (auth: I)
Chain Length:99
Number of Molecules:2
Biological Source:Mus musculus

UniProt ID:P01887 Pfam ID:PF07654

Primary Citation

CDR3 loop flexibility contributes to the degeneracy of TCR recognition

Reiser, J.-B, Darnault, C, Gregoire, C, Mosser, T, Mazza, G, Kearnay, A, van der Merwe, P.A, Fontecilla-Camps, J.C, Housset, D, Malissen, B, Reiser, J.-B, Gregoire, C, Darnault, C, Mosser, T, Guimezanes, A, Schmitt-Verhulst, A.-M, Fontecilla-Camps, J.C, Mazza, G, Malissen, B, Housset, D.Show

Nat.Immunol. 4 241 247 (2003)

PMID: 12563259 DOI: 10.1038/ni891

Abstact

T cell receptor (TCR) binding degeneracy lies at the heart of several physiological and pathological phenomena, yet its structural basis is poorly understood. We determined the crystal structure of a complex involving the BM3.3 TCR and an octapeptide (VSV8) bound to the H-2K(b) major histocompatibility complex molecule at a 2.7 A resolution, and compared it with the BM3.3 TCR bound to the H-2K(b) molecule loaded with a peptide that has no primary sequence identity with VSV8. Comparison of these structures showed that the BM3.3 TCR complementarity-determining region (CDR) 3alpha could undergo rearrangements to adapt to structurally different peptide residues. Therefore, CDR3 loop flexibility helps explain TCR binding cross-reactivity.

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Primary Citation of related structures