1JK8 image
Deposition Date 2001-07-11
Release Date 2001-08-22
Last Version Date 2024-10-16
Entry Detail
PDB ID:
1JK8
Keywords:
IMMUNE SYSTEM
Title:
Crystal structure of a human insulin peptide-HLA-DQ8 complex
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Spodoptera frugiperda
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.40 Å
R-Value Free:
0.25
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 1 21 1
1JK8 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:MHC class II HLA-DQ8
Chain IDs:A
Chain Length:181
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01909 Pfam ID:PF07654, PF00993
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:MHC class II HLA-DQ8
Chain IDs:B
Chain Length:190
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01920 Pfam ID:PF00969, PF07654
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:insulin B peptide
Chain IDs:C
Chain Length:14
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01308
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Ligand Molecules
NAG
Primary Citation
Structure of a human insulin peptide-HLA-DQ8 complex and susceptibility to type 1 diabetes.
Nat.Immunol. 2 501 507 (2001)
PMID: 11376336 DOI: 10.1038/88694

Abstact

The class II major histocompatibility complex (MHC) glycoproteins HLA-DQ8 and HLA-DQ2 in humans and I-A(g7) in nonobese diabetic (NOD) mice are the major risk factors for increased susceptibility to type 1 diabetes. Using X-ray crystallography, we have determined the three-dimensional structure of DQ8 complexed with an immunodominant peptide from insulin. The similarity of the DQ8, DQ2 and I-A(g7) peptide-binding pockets suggests that diabetes is caused by the same antigen-presentation event(s) in humans and NOD mice. Correlating type 1 diabetes epidemiology and MHC sequences with the DQ8 structure suggests that other structural features of the P9 pocket in addition to position 57 contribute to susceptibility to type 1 diabetes.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1JK8