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CRYSTAL STRUCTURES OF MURINE MHC CLASS I H-2 Db AND Kb MOLECULES IN COMPLEX WITH CTL EPITOPES FROM INFLUENZA A VIRUS: IMPLICATIONS FOR TCR REPERTOIRE SELECTION AND IMMUNODOMINANCE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of Murine Mhc Class I H-2 D(B) and K(B) Molecules in Complex with Ctl Epitopes from Influenza a Virus: Implications for Tcr Repertoire Selection and Immunodominance

Meijers, R.Lai, C.Yang, Y.Liu, J.Zhong, W.Wang, J.Reinherz, E.L.

(2005) J.Mol.Biol. 345: 1099

  • DOI: 10.1016/j.jmb.2004.11.023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cytotoxic T lymphocyte (CTL) responses against influenza A virus in C57BL/6 mice are dominated by a small number of viral peptides among many that are capable of binding to major histocompatibility complex (MHC) class I molecules. The basis of this l ...

    Cytotoxic T lymphocyte (CTL) responses against influenza A virus in C57BL/6 mice are dominated by a small number of viral peptides among many that are capable of binding to major histocompatibility complex (MHC) class I molecules. The basis of this limited immune recognition is unknown. Here, we present X-ray structures of MHC class I molecules in complex with two immunodominant epitopes (PA(224-233)/D(b) and PB1(703-711)/K(b)) and one non-immunogenic epitope (HA(468-477)/D(b)) of the influenza A virus. The immunodominant peptides are each characterized by a bulge at the C terminus, lifting P6 and P7 residues out of the MHC groove, presenting featured structural elements to T-cell receptors (TCRs). Immune recognition of PA(224-233)/D(b) will focus largely on the exposed P7 arginine residue. In contrast, the non-immunogenic HA(468-477) peptide lacks prominent features in this C-terminal bulge. In the K(b)-bound PB1(703-711) epitope, the bulge results from a non-canonical binding motif, such that the mode of presentation of this peptide strongly resembles that of D(b)-bound peptides. Given that PA(224-233)/D(b), PB1(703-711)/K(b) and the previously defined NP(366-374)/D(b) epitopes dominate the primary response to influenza A virus in C57BL/6 mice, our findings indicate that residues of the C-terminal bulge are important in selection of the immunodominant CTL repertoire.


    Organizational Affiliation

    Laboratory of Immunobiology, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
H-2 CLASS I HISTOCOMPATIBILITY ANTIGEN, D-B ALPHA CHAIN
A
276Mus musculusMutation(s): 0 
Gene Names: H2-D1
Find proteins for P01899 (Mus musculus)
Go to UniProtKB:  P01899
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA-2MICROGLOBULIN
B
99Mus musculusMutation(s): 0 
Gene Names: B2m
Find proteins for P01887 (Mus musculus)
Go to UniProtKB:  P01887
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
INFLUENZA A PEPTIDE
C
10Influenza A virusMutation(s): 0 
Gene Names: PA
Find proteins for Q8QLZ6 (Influenza A virus)
Go to UniProtKB:  Q8QLZ6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.230 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 56.552α = 90.00
b = 56.552β = 90.00
c = 277.654γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-01-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance