ISDA

Entry Detail

PDB ID:

1NAM

Keywords:

IMMUNE SYSTEM

Title:

MURINE ALLOREACTIVE SCFV TCR-PEPTIDE-MHC CLASS I MOLECULE COMPLEX

Biological Source:

Source Organism:

Mus musculus,

Host Organism:

Mus musculus

PDB Version:

Deposition Date:

2002-11-28

Release Date:

2003-03-11

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.70 Å

R-Value Free:

0.29

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:BM3.3 T Cell Receptor alpha-Chain
Chain IDs:A
Chain Length:116
Number of Molecules:1
Biological Source:Mus musculus

UniProt ID:Q5R1F1 Pfam ID:PF07686

Protein Blast

Polymer Type:polypeptide(L)
Description:BM3.3 T Cell Receptor beta-Chain
Chain IDs:B
Chain Length:113
Number of Molecules:1
Biological Source:Mus musculus

UniProt ID:P04214 Pfam ID:PF07686

Protein Blast

Polymer Type:polypeptide(L)
Description:H-2 class I histocompatibility antigen, K-B alpha chain precursor
Chain IDs:C (auth: H)
Chain Length:275
Number of Molecules:1
Biological Source:Mus musculus

UniProt ID:P01901 Pfam ID:PF00129, PF07654

Protein Blast

Polymer Type:polypeptide(L)
Description:Beta-2-microglobulin
Chain IDs:E (auth: L)
Chain Length:100
Number of Molecules:1
Biological Source:Mus musculus

UniProt ID:P01887 Pfam ID:PF07654

Protein Blast

Polymer Type:polypeptide(L)
Description:Nucleocapsid
Chain IDs:D (auth: P)
Chain Length:8
Number of Molecules:1
Biological Source:

UniProt ID:P11212

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
ASN	A	ASN	GLYCOSYLATION SITE

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, Darnault, C, Guimezanes, A, Gregoire, C, Mosser, T, Schmitt-Verhulst, A.-M, Fontecilla-Camps, J.C, Malissen, B, Housset, D, Mazza, G, 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, Fremont, D.H, Matsumura, M, Stura, E.A, Peterson, P.A, Wilson, I.A.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