2XPG

Crystal structure of a MHC class I-peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of Hla-A0301 in Complex with a Peptide of Proteolipid Protein: Insights Into the Role of Hla-A Alleles in Susceptibility to Multiple Sclerosis

Mcmahon, R.M.Friis, L.Siebold, C.Friese, M.A.Fugger, L.Jones, E.Y.

(2011) Acta Crystallogr.,Sect.D 67: 447

  • DOI: 10.1107/S0907444911007888

  • PubMed Abstract: 
  • The structure of the human major histocompatability (MHC) class I molecule HLA-A*0301 (HLA-A3) in complex with a nonameric peptide (KLIETYFSK) has been determined by X-ray crystallography to 2.7 Å resolution. HLA-A3 is a predisposing allele for multi ...

    The structure of the human major histocompatability (MHC) class I molecule HLA-A*0301 (HLA-A3) in complex with a nonameric peptide (KLIETYFSK) has been determined by X-ray crystallography to 2.7 Å resolution. HLA-A3 is a predisposing allele for multiple sclerosis (MS), an autoimmune disease of the central nervous system. The KLIETYFSK peptide is a naturally processed epitope of proteolipid protein, a myelin protein and candidate target for immune-mediated myelin destruction in MS. Comparison of the structure of HLA-A3 with that of HLA-A2, an MHC class I molecule which is protective against MS, indicates that both MHC class I molecules present very similar faces for T-cell receptor recognition whilst differing in the specificity of their peptide-binding grooves. These characteristics may underlie the opposing (predisposing versus protective) associations that they exhibit both in humans and in mouse models of MS-like disease. Furthermore, subtle alterations within the peptide-binding groove of HLA-A3 and other A3-like MHC class I molecules, members of the so-called A3 superfamily, may be sufficient to alter their presentation of autoantigen peptides such as KLIETYFSK. This in turn may modulate their contribution to the associated risk of autoimmune disease.


    Organizational Affiliation

    Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX39DS, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-3 ALPHA CHAIN
A
274Homo sapiensMutation(s): 0 
Gene Names: HLA-A (HLAA)
Find proteins for P04439 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P04439
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA-2-MICROGLOBULIN
B
98Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
MYELIN PROTEOLIPID PROTEIN
C
9Homo sapiensMutation(s): 0 
Gene Names: PLP1 (PLP)
Find proteins for P60201 (Homo sapiens)
Go to Gene View: PLP1
Go to UniProtKB:  P60201
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 62.140α = 90.00
b = 65.550β = 90.00
c = 107.210γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
MOLREPphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-27
    Type: Initial release
  • Version 1.1: 2012-03-28
    Type: Database references, Version format compliance