5WXC

Crystal Structure of HLA-A*2402 in complex with avian influenza A(H7N9) virus-derived peptide H7-25 (data set 2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Heterosubtypic Protections against Human-Infecting Avian Influenza Viruses Correlate to Biased Cross-T-Cell Responses.

Zhao, M.Liu, K.Luo, J.Tan, S.Quan, C.Zhang, S.Chai, Y.Qi, J.Li, Y.Bi, Y.Xiao, H.Wong, G.Zhou, J.Jiang, T.Liu, W.Yu, H.Yan, J.Liu, Y.Shu, Y.Wu, G.Wu, A.Gao, G.F.Liu, W.J.

(2018) mBio 9

  • DOI: 10.1128/mBio.01408-18
  • Primary Citation of Related Structures:  
    5WXC, 5WXD, 5WWU

  • PubMed Abstract: 
  • Against a backdrop of seasonal influenza virus epidemics, emerging avian influenza viruses (AIVs) occasionally jump from birds to humans, posing a public health risk, especially with the recent sharp increase in H7N9 infections. Evaluations of cross- ...

    Against a backdrop of seasonal influenza virus epidemics, emerging avian influenza viruses (AIVs) occasionally jump from birds to humans, posing a public health risk, especially with the recent sharp increase in H7N9 infections. Evaluations of cross-reactive T-cell immunity to seasonal influenza viruses and human-infecting AIVs have been reported previously. However, the roles of influenza A virus-derived epitopes in the cross-reactive T-cell responses and heterosubtypic protections are not well understood; understanding those roles is important for preventing and controlling new emerging AIVs. Here, among the members of a healthy population presumed to have previously been infected by pandemic H1N1 (pH1N1), we found that pH1N1-specific T cells showed cross- but biased reactivity to human-infecting AIVs, i.e., H5N1, H6N1, H7N9, and H9N2, which correlates with distinct protections. Through a T-cell epitope-based phylogenetic analysis, the cellular immunogenic clustering expanded the relevant conclusions to a broader range of virus strains. We defined the potential key conserved epitopes required for cross-protection and revealed the molecular basis for the immunogenic variations. Our study elucidated an overall profile of cross-reactivity to AIVs and provided useful recommendations for broad-spectrum vaccine development. IMPORTANCE We revealed preexisting but biased T-cell reactivity of pH1N1 influenza virus to human-infecting AIVs, which provided distinct protections. The cross-reactive T-cell recognition had a regular pattern that depended on the T-cell epitope matrix revealed via bioinformatics analysis. Our study elucidated an overall profile of cross-reactivity to AIVs and provided useful recommendations for broad-spectrum vaccine development.


    Organizational Affiliation

    Shenzhen Key Laboratory of Pathogen and Immunity, State Key Discipline of Infectious Disease, Shenzhen Third People's Hospital, Shenzhen, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HLA class I histocompatibility antigen, A-24 alpha chainAC274Homo sapiensMutation(s): 0 
Gene Names: HLA-AHLAA
Find proteins for P04439 (Homo sapiens)
Explore P04439 
Go to UniProtKB:  P04439
NIH Common Fund Data Resources
PHAROS  P04439
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinBD100Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
H7-25-FEF11Influenza A virus (A/chicken/China/028/2014(H7N9))Mutation(s): 0 
Gene Names: M1M
Find proteins for A0A0X9JHC1 (Influenza A virus)
Explore A0A0X9JHC1 
Go to UniProtKB:  A0A0X9JHC1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.373α = 90
b = 67.292β = 98.43
c = 88.346γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
CNSdata reduction
CNSdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2019-07-31
    Changes: Data collection, Database references