3FT2

Crystal Structure of a citrulline peptide variant of the minor histocompatibility peptide HA-1 in complex with HLA-A2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 

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:  
    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 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-2 alpha chainA275Homo sapiensMutation(s): 1 
Gene Names: HLAHLA-AHLAA
Find proteins for P04439 (Homo sapiens)
Explore P04439 
Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB100Homo sapiensMutation(s): 0 
Gene Names: B2Mbeta-2 microglubulineCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
citrulline variant HA-1 peptideP9N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CIR
Query on CIR
PL-PEPTIDE LINKINGC6 H13 N3 O3ARG
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.369α = 90
b = 80.104β = 114.59
c = 57.985γ = 90
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

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