6MT6

Crystal Structure of HLA-B*37:01 in complex with NP338 influenza peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.31 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report

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This is version 1.1 of the entry. See complete history


Literature

Broad CD8+T cell cross-recognition of distinct influenza A strains in humans.

Grant, E.J.Josephs, T.M.Loh, L.Clemens, E.B.Sant, S.Bharadwaj, M.Chen, W.Rossjohn, J.Gras, S.Kedzierska, K.

(2018) Nat Commun 9: 5427-5427

  • DOI: https://doi.org/10.1038/s41467-018-07815-5
  • Primary Citation of Related Structures:  
    6MT3, 6MT4, 6MT5, 6MT6, 6MTL, 6MTM

  • PubMed Abstract: 

    Newly-emerged and vaccine-mismatched influenza A viruses (IAVs) result in a rapid global spread of the virus due to minimal antibody-mediated immunity. In that case, established CD8 + T-cells can reduce disease severity. However, as mutations occur sporadically within immunogenic IAV-derived T-cell peptides, understanding of T-cell receptor (TCRαβ) cross-reactivity towards IAV variants is needed for a vaccine design. Here, we investigate TCRαβ cross-strain recognition across IAV variants within two immunodominant human IAV-specific CD8 + T-cell epitopes, HLA-B*37:01-restricted NP 338-346 (B37-NP 338 ) and HLA-A*01:01-restricted NP 44-52 (A1-NP 44 ). We find high abundance of cross-reactive TCRαβ clonotypes recognizing distinct IAV variants. Structures of the wild-type and variant peptides revealed preserved conformation of the bound peptides. Structures of a cross-reactive TCR-HLA-B37-NP 338 complex suggest that the conserved conformation of the variants underpins TCR cross-reactivity. Overall, cross-reactive CD8 + T-cell responses, underpinned by conserved epitope structure, facilitates recognition of distinct IAV variants, thus CD8 + T-cell-targeted vaccines could provide protection across different IAV strains.


  • Organizational Affiliation

    Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3010, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, B-37 alpha chain276Homo sapiensMutation(s): 0 
Gene Names: HLA-BHLAB
UniProt & NIH Common Fund Data Resources
Find proteins for P01889 (Homo sapiens)
Explore P01889 
Go to UniProtKB:  P01889
PHAROS:  P01889
GTEx:  ENSG00000234745 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01889
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
NP388 peptide9unidentified influenza virusMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulin100Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
PHAROS:  P61769
GTEx:  ENSG00000166710 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61769
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.31 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.88α = 90
b = 81.789β = 90
c = 110.192γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
PHASERphasing
BUSTERrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2019-02-13 
  • Deposition Author(s): Gras, S.

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-13
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Data collection, Database references, Refinement description