2ZSW

Crystal structure of H-2Kb in complex with the Q600Y variant of JHMV epitope S598


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Prevention of cytotoxic T cell escape using a heteroclitic subdominant viral T cell determinant.

Butler, N.S.Theodossis, A.Webb, A.I.Nastovska, R.Ramarathinam, S.H.Dunstone, M.A.Rossjohn, J.Purcell, A.W.Perlman, S.

(2008) PLoS Pathog 4

  • DOI: https://doi.org/10.1371/journal.ppat.1000186
  • Primary Citation of Related Structures:  
    2ZSV, 2ZSW

  • PubMed Abstract: 

    High affinity antigen-specific T cells play a critical role during protective immune responses. Epitope enhancement can elicit more potent T cell responses and can subsequently lead to a stronger memory pool; however, the molecular basis of such enhancement is unclear. We used the consensus peptide-binding motif for the Major Histocompatibility Complex molecule H-2K(b) to design a heteroclitic version of the mouse hepatitis virus-specific subdominant S598 determinant. We demonstrate that a single amino acid substitution at a secondary anchor residue (Q to Y at position 3) increased the stability of the engineered determinant in complex with H-2K(b). The structural basis for this enhanced stability was associated with local alterations in the pMHC conformation as a result of the Q to Y substitution. Recombinant viruses encoding this engineered determinant primed CTL responses that also reacted to the wildtype epitope with significantly higher functional avidity, and protected against selection of virus mutated at a second CTL determinant and consequent disease progression in persistently infected mice. Collectively, our findings provide a basis for the enhanced immunogenicity of an engineered determinant that will serve as a template for guiding the development of heteroclitic T cell determinants with applications in prevention of CTL escape in chronic viral infections as well as in tumor immunity.


  • Organizational Affiliation

    Department of Microbiology, University of Iowa, Iowa City, Iowa, United States of America.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H-2 class I histocompatibility antigen, K-B alpha chainA,
B [auth E],
C,
D [auth G]
278Mus musculusMutation(s): 0 
Gene Names: H2-K1H2-K
UniProt
Find proteins for P01901 (Mus musculus)
Explore P01901 
Go to UniProtKB:  P01901
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01901
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulinE [auth H],
F,
G [auth B],
H [auth D]
99Mus musculusMutation(s): 0 
Gene Names: B2m
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
Explore P01887 
Go to UniProtKB:  P01887
IMPC:  MGI:88127
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01887
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
8-mer peptide from spike glycoproteinI [auth M],
J [auth N],
K [auth O],
L [auth P]
8N/AMutation(s): 0 
UniProt
Find proteins for P11225 (Murine coronavirus (strain JHM))
Explore P11225 
Go to UniProtKB:  P11225
Entity Groups  
UniProt GroupP11225
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
ABA
Query on ABA
I [auth M],
J [auth N],
K [auth O],
L [auth P]
L-PEPTIDE LINKINGC4 H9 N O2ALA
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.711α = 81.11
b = 90.147β = 70.58
c = 91.969γ = 68.25
Software Package:
Software NamePurpose
REFMACrefinement
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.3: 2023-11-15
    Changes: Data collection