4WJ5

Structure of HLA-A2 in complex with an altered peptide ligands based on Mart-1 variant epitope

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Altered Peptide Ligands Revisited: Vaccine Design through Chemically Modified HLA-A2-Restricted T Cell Epitopes.

Hoppes, R., Oostvogels, R., Luimstra, J.J., Wals, K., Toebes, M., Bies, L., Ekkebus, R., Rijal, P., Celie, P.H., Huang, J.H., Emmelot, M.E., Spaapen, R.M., Lokhorst, H., Schumacher, T.N., Mutis, T., Rodenko, B., Ovaa, H.

(2014) J Immunol. 193: 4803-4813

  • DOI: 10.4049/jimmunol.1400800

  • PubMed Abstract: 

    • Virus or tumor Ag-derived peptides that are displayed by MHC class I molecules are attractive starting points for vaccine development because they induce strong protective and therapeutic cytotoxic T cell responses. In thus study, we show that the MH ...

    Virus or tumor Ag-derived peptides that are displayed by MHC class I molecules are attractive starting points for vaccine development because they induce strong protective and therapeutic cytotoxic T cell responses. In thus study, we show that the MHC binding and consequent T cell reactivity against several HLA-A*02 restricted epitopes can be further improved through the incorporation of nonproteogenic amino acids at primary and secondary anchor positions. We screened more than 90 nonproteogenic, synthetic amino acids through a range of epitopes and tested more than 3000 chemically enhanced altered peptide ligands (CPLs) for binding affinity to HLA-A*0201. With this approach, we designed CPLs of viral epitopes, of melanoma-associated Ags, and of the minor histocompatibility Ag UTA2-1, which is currently being evaluated for its antileukemic activity in clinical dendritic cell vaccination trials. The crystal structure of one of the CPLs in complex with HLA-A*0201 revealed the molecular interactions likely responsible for improved binding. The best CPLs displayed enhanced affinity for MHC, increasing MHC stability and prolonging recognition by Ag-specific T cells and, most importantly, they induced accelerated expansion of antitumor T cell frequencies in vitro and in vivo as compared with the native epitope. Eventually, we were able to construct a toolbox of preferred nonproteogenic residues with which practically any given HLA-A*02 restricted epitope can be readily optimized. These CPLs could improve the therapeutic outcome of vaccination strategies or can be used for ex vivo enrichment and faster expansion of Ag-specific T cells for transfer into patients.

    Organizational Affiliation: 

    Division of Cell Biology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A, D
275Homo sapiensMutation(s): 0 
Gene Names: HLA-A (HLAA)
Find proteins for P01892 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P01892
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, E
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
Melanoma antigen recognized by T-cells 1
C, F
10Homo sapiensMutation(s): 0 
Gene Names: MLANA (MART1)
Find proteins for Q16655 (Homo sapiens)
Go to Gene View: MLANA
Go to UniProtKB:  Q16655
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download SDF File 
Download CCD File 
A, B, D, E
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
NVA
Query on NVA
C, F
L-PEPTIDE LINKINGC5 H11 N O2VAL
LPH
Query on LPH
C, F
L-peptide linkingC5 H7 N O2

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GRN
Query on GRN
C, F
NON-POLYMERC9 H11 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.155 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 63.180α = 90.00
b = 87.140β = 90.15
c = 79.194γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
PDB_EXTRACTdata extraction
SCALAdata scaling
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-29
    Type: Initial release
  • Version 1.1: 2014-11-19
    Type: Database references