1MWA image
Deposition Date 2002-09-27
Release Date 2002-11-27
Last Version Date 2024-11-20
Entry Detail
PDB ID:
1MWA
Keywords:
Title:
2C/H-2KBM3/DEV8 ALLOGENEIC COMPLEX
Biological Source:
Source Organism:
Mus musculus (Taxon ID: 10090)
(Taxon ID: )
Method Details:
Experimental Method:
Resolution:
2.40 Å
R-Value Free:
0.31
R-Value Work:
0.28
R-Value Observed:
0.28
Space Group:
P 21 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:2C T CELL RECEPTOR ALPHA CHAIN
Chain IDs:A, B (auth: C)
Chain Length:202
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:2C T CELL RECEPTOR BETA CHAIN
Chain IDs:C (auth: B), D
Chain Length:237
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:H-2KBM3 MHC CLASS I MOLECULE HEAVY CHAIN
Gene (Uniprot):H2-K1
Chain IDs:E (auth: H), F (auth: I)
Chain Length:275
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:MICROGLOBULIN MHC LIGHT CHAIN
Gene (Uniprot):B2m
Chain IDs:G (auth: L), H (auth: M)
Chain Length:99
Number of Molecules:2
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:DEV8
Gene (Uniprot):Ndufa4
Chain IDs:I (auth: P), J (auth: Q)
Chain Length:8
Number of Molecules:2
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Primary Citation
Structural comparison of allogeneic and syngeneic T cell receptor-peptide-major histocompatibility complex complexes: a buried alloreactive mutation subtly alters peptide presentation substantially increasing V(beta) Interactions.
J.EXP.MED. 195 1175 1186 (2002)
PMID: 11994422 DOI: 10.1084/jem.20011644

Abstact

The crystal structures of the 2C/H-2K(bm3)-dEV8 allogeneic complex at 2.4 A and H-2K(bm3)-dEV8 at 2.15 A, when compared with their syngeneic counterparts, elucidate structural changes that induce an alloresponse. The Asp77Ser mutation that imbues H-2K(bm3)-dEV8 with its alloreactive properties is located beneath the peptide and does not directly contact the T cell receptor (TCR). However, the buried mutation induces local rearrangement of the peptide itself to preserve hydrogen bonding interactions between the peptide and the alpha(1) 77 residue. The COOH terminus of the peptide main chain is tugged toward the alpha(1)-helix such that its presentation to the TCR is altered. These changes increase the stability of the allogeneic peptide-major histocompatibility complex (pMHC) complex and increase complementarity in the TCR-pMHC interface, placing greater emphasis on recognition of the pMHC by the TCR beta-chain, evinced by an increase in shape complementarity, buried surface area, and number of TCR-pMHC contacting residues. A nearly fourfold increase in the number of beta-chain-pMHC contacts is accompanied by a concomitant 64% increase in beta-chain-pMHC shape complementarity. Thus, the allogeneic mutation causes the same peptide to be presented differently, temporally and spatially, by the allogeneic and syngeneic MHCs.

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Primary Citation of related structures