3BUY

MHC-I in complex with peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.248 

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This is version 1.1 of the entry. See complete history


Literature

Epitope-specific TCRbeta repertoire diversity imparts no functional advantage on the CD8+ T cell response to cognate viral peptides

La Gruta, N.L.Thomas, P.G.Webb, A.I.Dunstone, M.A.Cukalac, T.Doherty, P.C.Purcell, A.W.Rossjohn, J.Turner, S.J.

(2008) Proc Natl Acad Sci U S A 105: 2034-2039

  • DOI: 10.1073/pnas.0711682102
  • Primary Citation of Related Structures:  
    3BUY

  • PubMed Abstract: 
  • TCR repertoire diversity has been convincingly shown to facilitate responsiveness of CD8+ T cell populations to mutant virus peptides, thereby safeguarding against viral escape. However, the impact of repertoire diversity on the functionality of the CD8+ T cell response to cognate peptide-MHC class I complex (pMHC) recognition remains unclear ...

    TCR repertoire diversity has been convincingly shown to facilitate responsiveness of CD8+ T cell populations to mutant virus peptides, thereby safeguarding against viral escape. However, the impact of repertoire diversity on the functionality of the CD8+ T cell response to cognate peptide-MHC class I complex (pMHC) recognition remains unclear. Here, we have compared TCRbeta chain repertoires of three influenza A epitope-specific CD8+ T cell responses in C57BL/6 (B6) mice: D(b)NP(366-374), D(b)PA(224-233), and a recently described epitope derived from the +1 reading frame of the influenza viral polymerase B subunit (residues 62-70) (D(b)PB1-F2(62)). Corresponding to the relative antigenicity of the respective pMHCs, and irrespective of the location of prominent residues, the D(b)PA(224)- and D(b)PB1-F2(62)-specific repertoires were similarly diverse, whereas the D(b)NP(366) population was substantially narrower. Importantly, parallel analysis of response magnitude, cytotoxicity, TCR avidity, and cytokine production for the three epitope-specific responses revealed no obvious functional advantage conferred by increased T cell repertoire diversity. Thus, whereas a diverse repertoire may be important for recognition of epitope variants, its effect on the response to cognate pMHC recognition appears minimal.


    Organizational Affiliation

    Department of Microbiology and Immunology, University of Melbourne, Parkville 3010, Victoria, Australia.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
H-2 class I histocompatibility antigen, D-B alpha chainA275Mus musculusMutation(s): 0 
Gene Names: H2-D1
UniProt
Find proteins for P01899 (Mus musculus)
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Go to UniProtKB:  P01899
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UniProt GroupP01899
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinB99Mus musculusMutation(s): 0 
Gene Names: B2m
UniProt & NIH Common Fund Data Resources
Find proteins for P01887 (Mus musculus)
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Go to UniProtKB:  P01887
IMPC:  MGI:88127
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UniProt GroupP01887
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
epitope of PB1-F2C9Influenza A virusMutation(s): 0 
Gene Names: PB1
UniProt
Find proteins for P0C0U1 (Influenza A virus (strain A/Puerto Rico/8/1934 H1N1))
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Go to UniProtKB:  P0C0U1
Entity Groups  
UniProt GroupP0C0U1
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.248 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.756α = 90
b = 55.756β = 90
c = 278.604γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-03-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance