4JUG

Crystal structure of 1918 pandemic influenza virus hemagglutinin mutant D225G

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

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This is version 2.0 of the entry. See complete history. 


Literature

Molecular basis of the receptor binding specificity switch of the hemagglutinins from both the 1918 and 2009 pandemic influenza A viruses by a D225G substitution

Zhang, W., Shi, Y., Qi, J., Gao, F., Li, Q., Fan, Z., Yan, J., Gao, G.F.

(2013) J Virol 87: 5949-5958

  • DOI: 10.1128/JVI.00545-13
  • Primary Citation of Related Structures:  
    4JTV, 4JTX, 4JU0, 4JUG, 4JUH, 4JUJ

  • PubMed Abstract: 

    • Influenza A virus uses sialic acids as cell entry receptors, and there are two main receptor forms, α2,6 linkage or α2,3 linkage to galactose, that determine virus host ranges (mammalian or avian). The receptor binding hemagglutinins (HAs) of both 1918 and 2009 pandemic H1N1 (18H1 and 09H1, respectively) influenza A viruses preferentially bind to the human α2,6 linkage receptor ...

    Influenza A virus uses sialic acids as cell entry receptors, and there are two main receptor forms, α2,6 linkage or α2,3 linkage to galactose, that determine virus host ranges (mammalian or avian). The receptor binding hemagglutinins (HAs) of both 1918 and 2009 pandemic H1N1 (18H1 and 09H1, respectively) influenza A viruses preferentially bind to the human α2,6 linkage receptor. A single D225G mutation in both H1s switches receptor binding specificity from α2,6 linkage binding to dual receptor binding. However, the molecular basis for this specificity switch is not fully understood. Here, we show via H1-ligand complex structures that the D225G substitution results in a loss of a salt bridge between amino acids D225 and K222, enabling the key residue Q226 to interact with the avian receptor, thereby obtaining dual receptor binding. This is further confirmed by a D225E mutant that retains human receptor binding specificity with the salt bridge intact.

    Organizational Affiliation: 

    CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HemagglutininA, C, E, G, I, K324Influenza A virus (A/South Carolina/1/1918(H1N1))Mutation(s): 1 
Gene Names: HA
Find proteins for Q9WFX3 (Influenza A virus (strain A/Brevig Mission/1/1918 H1N1))
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Go to UniProtKB:  Q9WFX3
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HemagglutininB, D, F, H, J, L170Influenza A virus (A/South Carolina/1/1918(H1N1))Mutation(s): 0 
Gene Names: HA
Find proteins for Q9WFX3 (Influenza A virus (strain A/Brevig Mission/1/1918 H1N1))
Explore Q9WFX3 
Go to UniProtKB:  Q9WFX3
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseM, N, P, Q, R, T2 N-Glycosylation Oligosaccharides Interaction
Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseO, S3 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.856α = 90
b = 120.856β = 90
c = 235.724γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-08-07
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary