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 
  • R-Value Observed: 0.184 

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This is version 1.2 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:  
    3FT2, 3FT3, 3FT4

  • 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 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 ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-2 alpha chainA275Homo sapiensMutation(s): 1 
Gene Names: HLAHLA-AHLAA
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PHAROS:  P04439
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UniProt GroupP04439
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB100Homo sapiensMutation(s): 0 
Gene Names: B2Mbeta-2 microglubulineCDABP0092HDCMA22P
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Find proteins for P61769 (Homo sapiens)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
histidine variant HA-1 peptideC [auth P]9N/AMutation(s): 0 
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Find proteins for Q92619 (Homo sapiens)
Explore Q92619 
Go to UniProtKB:  Q92619
PHAROS:  Q92619
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UniProt GroupQ92619
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.47α = 90
b = 79.75β = 111.02
c = 54.21γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
AMoREphasing
REFMACrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references