Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.79 kDa 
• Atom Count: 3488 
• Residue Count: 384 
• Unique protein chains: 3

3FT3

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

• DOI: 10.2210/pdb3FT3/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-01-12 Released: 2009-04-28 
• Deposition Author(s): Reiser, J.-B., Gras, S., Chouquet, A., Le Gorrec, M., Spierings, E., Goulmy, E., Housset, D.

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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 

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

• PubMed: 19342659 
• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HLA class I histocompatibility antigen, A-2 alpha chain	A	275	Homo sapiens	Mutation(s): 1  Gene Names: HLA, HLA-A, HLAA
Find proteins for P04439 (Homo sapiens) Explore P04439  Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439 GTEx  ENSG00000206503

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M, beta-2 microglubuline, CDABP0092, HDCMA22P
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769 GTEx  ENSG00000166710

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
histidine variant HA-1 peptide	P	9	N/A	Mutation(s): 0
Find proteins for Q92619 (Homo sapiens) Explore Q92619  Go to UniProtKB:  Q92619
NIH Common Fund Data Resources
PHAROS  Q92619 GTEx  ENSG00000180448

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 = 51.47	α = 90
b = 79.75	β = 111.02
c = 54.21	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
AMoRE	phasing
REFMAC	refinement
XDS	data reduction
XDS	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-01-12 
• Released Date: 2009-04-28 
Deposition Author(s): Reiser, J.-B., Gras, S., Chouquet, A., Le Gorrec, M., Spierings, E., Goulmy, E., Housset, D.

Revision History 

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