4U6X

Crystal Structure of HLA-A*0201 in complex with ALQDA, a 15 mer self-peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Naturally Processed Non-canonical HLA-A*02:01 Presented Peptides.

Hassan, C.Chabrol, E.Jahn, L.Kester, M.G.de Ru, A.H.Drijfhout, J.W.Rossjohn, J.Falkenburg, J.H.Heemskerk, M.H.Gras, S.van Veelen, P.A.

(2015) J.Biol.Chem. 290: 2593-2603

  • DOI: 10.1074/jbc.M114.607028
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human leukocyte antigen (HLA) class I molecules generally present peptides (p) of 8 to 11 amino acids (aa) in length. Although an increasing number of examples with lengthy (>11 aa) peptides, presented mostly by HLA-B alleles, have been reported. Her ...

    Human leukocyte antigen (HLA) class I molecules generally present peptides (p) of 8 to 11 amino acids (aa) in length. Although an increasing number of examples with lengthy (>11 aa) peptides, presented mostly by HLA-B alleles, have been reported. Here we characterize HLA-A*02:01 restricted, in addition to the HLA-B*0702 and HLA-B*4402 restricted, lengthy peptides (>11 aa) arising from the B-cell ligandome. We analyzed a number of 15-mer peptides presented by HLA-A*02:01, and confirmed pHLA-I formation by HLA folding and thermal stability assays. Surprisingly the binding affinity and stability of the 15-mer epitopes in complex with HLA-A*02:01 were comparable with the values observed for canonical length (8 to 11 aa) HLA-A*02:01-restricted peptides. We solved the structures of two 15-mer epitopes in complex with HLA-A*02:01, within which the peptides adopted distinct super-bulged conformations. Moreover, we demonstrate that T-cells can recognize the 15-mer peptides in the context of HLA-A*02:01, indicating that these 15-mer peptides represent immunogenic ligands. Collectively, our data expand our understanding of longer epitopes in the context of HLA-I, highlighting that they are not limited to the HLA-B family, but can bind the ubiquitous HLA-A*02:01 molecule, and play an important role in T-cell immunity.


    Organizational Affiliation

    From the Departments of Immunohematology and Blood Transfusion and.,Hematology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands.,the Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton 3800, Australia, the ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton 3800, Australia, and the Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, Wales, United Kingdom.,the Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton 3800, Australia, the ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton 3800, Australia, and stephanie.gras@monash.edu.,the Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton 3800, Australia.,From the Departments of Immunohematology and Blood Transfusion and p.a.van_veelen@lumc.nl.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A
276Homo 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
100Homo 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
ALQDA peptide, ALQDAGDSSRKEYFI
P
15N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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Download CCD File 
B, P
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.163 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.043α = 90.00
b = 79.063β = 111.11
c = 54.903γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXrefinement
PHASERphasing
PDB_EXTRACTdata extraction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-12-24
    Type: Initial release
  • Version 1.1: 2014-12-31
    Type: Database references
  • Version 1.2: 2015-02-11
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Advisory, Data collection, Database references, Derived calculations, Other, Refinement description, Source and taxonomy