1EEY

Crystal Structure Determination Of HLA A2 Complexed to Peptide GP2 with the substitution (I2L/V5L/L9V)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Class I major histocompatibility complex anchor substitutions alter the conformation of T cell receptor contacts.

Sharma, A.K.Kuhns, J.J.Yan, S.Friedline, R.H.Long, B.Tisch, R.Collins, E.J.

(2001) J.Biol.Chem. 276: 21443-21449

  • DOI: 10.1074/jbc.M010791200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • An immunogenic peptide (GP2) derived from HER-2/neu binds to HLA-A2.1 very poorly. Some altered-peptide ligands (APL) of GP2 have increased binding affinity and generate improved cytotoxic T lymphocyte recognition of GP2-presenting tumor cells, but m ...

    An immunogenic peptide (GP2) derived from HER-2/neu binds to HLA-A2.1 very poorly. Some altered-peptide ligands (APL) of GP2 have increased binding affinity and generate improved cytotoxic T lymphocyte recognition of GP2-presenting tumor cells, but most do not. Increases in binding affinity of single-substitution APL are not additive in double-substitution APL. A common first assumption about peptide binding to class I major histocompatibility complex is that each residue binds independently. In addition, immunologists interested in immunotherapy frequently assume that anchor substitutions do not affect T cell receptor contact residues. However, the crystal structures of two GP2 APL show that the central residues change position depending on the identity of the anchor residue(s). Thus, it is clear that subtle changes in the identity of anchor residues may have significant effects on the positions of the T cell receptor contact residues.


    Related Citations: 
    • Poor Binding of HER-2/neu Epitope (GP2) to HLA-A2.1 is Due to a Lack of Interactions with the Center of the Peptide
      Kuhns, J.J.,Batalia, M.A.,Yan, S.,Collins, E.J.
      (1999) J.Biol.Chem. 274: 36422


    Organizational Affiliation

    Departments of Microbiology, the Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA-A2.1 MHC CLASS I (HEAVY 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 (LIGHT CHAIN)
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
GP2 PEPTIDE
C, F
9N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.248 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 49.950α = 82.07
b = 62.930β = 76.50
c = 74.650γ = 78.04
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance