1FG2

CRYSTAL STRUCTURE OF THE LCMV PEPTIDIC EPITOPE GP33 IN COMPLEX WITH THE MURINE CLASS I MHC MOLECULE H-2DB

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.236 

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This is version 1.2 of the entry. See complete history. 


Literature

Viral escape at the molecular level explained by quantitative T-cell receptor/peptide/MHC interactions and the crystal structure of a peptide/MHC complex.

Tissot, A.C., Ciatto, C., Mittl, P.R., Grutter, M.G., Pluckthun, A.

(2000) J Mol Biol 302: 873-885

  • DOI: 10.1006/jmbi.2000.4501
  • Primary Citation of Related Structures:  
    1FG2

  • PubMed Abstract: 

    • Viral escape, first characterized for the lymphocytic choriomeningitis virus (LCMV) in a mouse transgenic for the P14 T cell-receptor (TCR), can be due to mutations in T-cell epitopes. We have measured the affinity between the H-2D(b) containing the ...

    Viral escape, first characterized for the lymphocytic choriomeningitis virus (LCMV) in a mouse transgenic for the P14 T cell-receptor (TCR), can be due to mutations in T-cell epitopes. We have measured the affinity between the H-2D(b) containing the wild-type and two of its "viral escape" epitopes, as well as other altered peptide ligands (APL), by using BIACORE analysis, and solved the crystal structure of H-2D(b) in complex with the wild-type peptide at 2.75 A resolution. We show that viral escape is due to a 50 to 100-fold reduction in the level of affinity between the P14 TCR and the binary complexes of the MHC molecule with the different peptides. Structurally, one of the mutations alters a TCR contact residue, while the effect of the other on the binding of the TCR must be indirect through structural rearrangements. The former is a null ligand, while the latter still leads to some central tolerance. This work defines the structural and energetic threshold for viral escape.

    Organizational Affiliation: 

    Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, Zürich, CH-8057, Switzerland.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 CLASS I HISTOCOMPATIBILITY ANTIGEN, D-B ALPHA CHAINA, D, G, J281Mus musculusMutation(s): 0 
Gene Names: H2-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 MICROGLOBULINB, E, H, K100Mus 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
LCMV PEPTIDIC EPITOPE GP33C, F, I, L9N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.527α = 90
b = 124.77β = 103.03
c = 99.555γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance