5XL2

The structure of hemagglutininfrom a swine-origin H4N6 influenza virus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Avian-to-Human Receptor-Binding Adaptation by Influenza A Virus Hemagglutinin H4

Song, H.Qi, J.Xiao, H.Bi, Y.Zhang, W.Xu, Y.Wang, F.Shi, Y.Gao, G.F.

(2017) Cell Rep 20: 1201-1214

  • DOI: https://doi.org/10.1016/j.celrep.2017.07.028
  • Primary Citation of Related Structures:  
    5XL1, 5XL2, 5XL3, 5XL4, 5XL5, 5XL6, 5XL7, 5XL8, 5XL9, 5XLA, 5XLB, 5XLC, 5XLD

  • PubMed Abstract: 

    Low-pathogenicity avian influenza viruses (LPAIVs) have caused a global concern to public health since the first novel LPAIV H7N9 outbreak occurred. The receptor-binding properties of the viral hemagglutinin are one key factor for efficient transmission and infection in humans. Recent evidence shows that H4 subtype viruses have been widely circulating in domestic poultry and human asymptomatic infections might have occurred. Here, we evaluated the receptor-binding properties of two representative isolates, avian H4N6 (containing Q226 and G228) and swine H4N6 (containing L226 and S228), and found that the avian isolate preferentially binds to avian receptors, whereas the swine isolate preferentially binds to human receptors. The Q226L and G228S substitutions are pivotal for the receptor-binding switch, which resulted in similar human receptor-binding features to the pandemic H2 and H3, implying that H4 has the potential to cause human infections. This early-warning study calls for future extensive surveillance.


  • Organizational Affiliation

    Research Network of Immunity and Health (RNIH), Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China; CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemagglutinin
A, B, C
503Influenza A virus (A/swine/Ontario/01911-1/99 (H4N6))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for Q9E148 (Influenza A virus)
Explore Q9E148 
Go to UniProtKB:  Q9E148
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9E148
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.419α = 90
b = 120.559β = 92.29
c = 132.278γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-08-16
    Changes: Database references
  • Version 1.2: 2017-08-23
    Changes: Data collection
  • Version 1.3: 2018-02-07
    Changes: Structure summary
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.5: 2023-11-22
    Changes: Data collection, Database references, Refinement description, Structure summary