1ZHB

Crystal Structure Of The Murine Class I Major Histocompatibility Complex Of H-2Db, B2-Microglobulin, and a 9-Residue Peptide Derived from rat dopamine beta-monooxigenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A structural basis for CD8+ T cell-dependent recognition of non-homologous peptide ligands: implications for molecular mimicry in autoreactivity

Sandalova, T.Michaelsson, J.Harris, R.A.Odeberg, J.Schneider, G.Karre, K.Achour, A.

(2005) J Biol Chem 280: 27069-27075

  • DOI: 10.1074/jbc.M500927200
  • Primary Citation of Related Structures:  
    1ZHB

  • PubMed Abstract: 
  • Molecular mimicry of self-epitopes by viral antigens is one possible pathogenic mechanism underlying induction of autoimmunity. A self-epitope, mDBM, derived from mouse dopamine beta-mono-oxygenase (KALYDYAPI) sharing 44% sequence identity with the l ...

    Molecular mimicry of self-epitopes by viral antigens is one possible pathogenic mechanism underlying induction of autoimmunity. A self-epitope, mDBM, derived from mouse dopamine beta-mono-oxygenase (KALYDYAPI) sharing 44% sequence identity with the lymphocytic choriomeningitis virus-derived immunodominant epitope gp33 (KAVYNFATC/M), has previously been identified as a cross-reactive self-ligand, presentation of which results in autoimmunity. A rat peptide homologue, rDBM (KALYNYAPI, 56% identity to gp33), which displayed similar properties to mDBM, has also been identified. We herein report the crystal structure of H-2Db.rDBM and a comparison with the crystal structures of the cross-reactive H-2Db.gp33 and non-cross-reactive H-2Db.gp33 (V3L) escape variant (KALYNFATM, 88% identity to gp33). Despite the large sequence disparity, rDBM and gp33 peptides are presented in nearly identical manners by H-2Db, with a striking juxtaposition of the central sections of both peptides from residues p3 to p7. The structural similarity provides H-2Db in complex with either a virus-derived or a dopamine beta-mono-oxygenase-derived peptide with a shared antigenic identity that conserves the positioning of the heavy chain and peptide residues that interact with the T cell receptor (TCR). This stands in contrast to the structure of H-2Db.gp33 (V3L), in which a single conserved mutation, also present in rDBM, induces large movements of both the peptide backbone and the side chains that interact with the TCR. The TCR-interacting surfaces of the H-2Db.rDBM and H-2Db.gp33 major histocompatibility complexes are very similar with regard to shape, topology, and charge distribution, providing a structural basis for CD8 T cell activation by molecular mimicry and potential subsequent development of autoreactivity.


    Related Citations: 
    • A structural basis for LCMV immune evasion: subversion of H-2D(b) and H-2K(b) presentation of gp33 revealed by comparative crystal structure.Analyses
      Achour, A., Michaelsson, J., Harris, R.A., Odeberg, J., Grufman, P., Sandberg, J.K., Levitsky, V., Karre, K., Sandalova, T., Schneider, G.
      (2002) Immunity 17: 757

    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Microbiology and Tumor Biology Center, and Strategic Research Center IRIS for Studies of Integrated Recognition in the Immune System, Karolinska Institutet, SE-171 77 Stockholm, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 class I histocompatibility antigen, D-B alpha chainADGJ276Mus musculusMutation(s): 0 
Gene Names: H2-DH2-D1
Find proteins for P01899 (Mus musculus)
Explore P01899 
Go to UniProtKB:  P01899
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinBEHK99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Explore P01887 
Go to UniProtKB:  P01887
NIH Common Fund Data Resources
IMPC  MGI:88127
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
9-mer peptide from Dopamine beta-monooxygenaseCFIL9Rattus norvegicusMutation(s): 0 
Gene Names: Dbh
EC: 1.14.17.1
Find proteins for Q05754 (Rattus norvegicus)
Explore Q05754 
Go to UniProtKB:  Q05754
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.063α = 90
b = 122.715β = 103
c = 99.403γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Data collection, Database references, Source and taxonomy