3FT3

Crystal Structure of the minor histocompatibility peptide HA-1His in complex with HLA-A2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Steric hindrance and fast dissociation explain the lack of immunogenicity of the minor histocompatibility HA-1Arg Null allele.

Spierings, E.Gras, S.Reiser, J.B.Mommaas, B.Almekinders, M.Kester, M.G.Chouquet, A.Le Gorrec, M.Drijfhout, J.W.Ossendorp, F.Housset, D.Goulmy, E.

(2009) J.Immunol. 182: 4809-4816

  • DOI: 10.4049/jimmunol.0803911
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The di-allelic HLA-A2 restricted minor histocompatibility Ag HA-1 locus codes for the highly immunogenic HA-1(His) and the nonimmunogenic HA-1(Arg) nonapeptides, differing in one amino acid. The HA-1(His) peptide is currently used for boosting the gr ...

    The di-allelic HLA-A2 restricted minor histocompatibility Ag HA-1 locus codes for the highly immunogenic HA-1(His) and the nonimmunogenic HA-1(Arg) nonapeptides, differing in one amino acid. The HA-1(His) peptide is currently used for boosting the graft-vs-tumor responses after HLA matched HA-1 mismatched stem cell transplantation; usage of the HA-1(Arg) peptide would significantly enlarge the applicability for this therapy. Our studies on mechanisms causing the HA-1 unidirectional immunogenicity revealed marginal differences in proteasomal digestion, TAP translocation, and binding affinity, whereas both dissociation rates and structural analyses clearly showed marked differences in the stability of these two HLA-A2 bound alleles. These data provide a rationale for the lack of HA-1(Arg) peptide immunogenicity essential for the choice of tumor peptides for stem cell-based immunotherapeutic application.


    Organizational Affiliation

    Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A
275Homo sapiensMutation(s): 1 
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
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
histidine variant HA-1 peptide
P
9Homo sapiensMutation(s): 0 
Gene Names: ARHGAP45 (HMHA1, KIAA0223)
Find proteins for Q92619 (Homo sapiens)
Go to Gene View: ARHGAP45
Go to UniProtKB:  Q92619
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.470α = 90.00
b = 79.750β = 111.02
c = 54.210γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
AMoREphasing
ADSCdata collection
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance