1I4F image
Deposition Date 2001-02-21
Release Date 2001-07-25
Last Version Date 2024-10-16
Entry Detail
PDB ID:
1I4F
Keywords:
IMMUNE SYSTEM
Title:
CRYSTAL STRUCTURE OF HLA-A*0201/MAGE-A4-PEPTIDE COMPLEX
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
(Taxon ID: )
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.40 Å
R-Value Free:
0.17
R-Value Work:
0.13
R-Value Observed:
0.13
Space Group:
P 1 21 1
1I4F validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-2 ALPHA CHAIN
Chain IDs:A
Chain Length:275
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P04439 Pfam ID:PF00129, PF07654
Protein Blast
Polymer Type:polypeptide(L)
Molecule:BETA-2-MICROGLOBULIN
Gene (Uniprot):B2M
Chain IDs:B
Chain Length:100
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P61769 Pfam ID:PF07654
Protein Blast
Polymer Type:polypeptide(L)
Molecule:MELANOMA-ASSOCIATED ANTIGEN 4
Gene (Uniprot):MAGEA4
Chain IDs:C
Chain Length:10
Number of Molecules:1
Biological Source:
UniProt ID:P43358
Ligand Molecules
1PG
Primary Citation
High-resolution structure of HLA-A*0201 in complex with a tumour-specific antigenic peptide encoded by the MAGE-A4 gene.
J.Mol.Biol. 310 1167 1176 (2001)
PMID: 11502003 DOI: 10.1006/jmbi.2001.4816

Abstact

The heterotrimeric complex of the human major histocompatibity complex (MHC) molecule HLA-A*0201, beta2-microglobulin and the decameric peptide GVYDGREHTV derived from the melanoma antigen (MAGE-A4 protein has been determined by X-ray crystallography at 1.4 A resolution. MAGE-A4 belongs to a family of genes that are specifically expressed in a variety of tumours. MAGE-A4-derived peptides are presented by MHC molecules at the cell surface to cytotoxic T-lymphocytes. As the HLA-A*0201:MAGE-A4 complex occurs only on tumour cells, it is considered to be an appropriate target for immunotherapy. The structure presented here reveals potential epitopes specific to the complex and indicates which peptide residues could be recognised by T-cell receptors. In addition, as the structure could be refined anisotropically, it was possible to describe the movements of the bound peptide in more detail.

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Protein

Chemical

Disease

Primary Citation of related structures
1QEW