5T08

Crystal structure of H6 hemagglutinin G225D mutant from Taiwan (2013) H6N1 influenza virus

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

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This is version 1.5 of the entry. See complete history. 


Literature

A single mutation in Taiwanese H6N1 influenza hemagglutinin switches binding to human-type receptors.

de Vries, R.P., Tzarum, N., Peng, W., Thompson, A.J., Ambepitiya Wickramasinghe, I.N., de la Pena, A.T.T., van Breemen, M.J., Bouwman, K.M., Zhu, X., McBride, R., Yu, W., Sanders, R.W., Verheije, M.H., Wilson, I.A., Paulson, J.C.

(2017) EMBO Mol Med 9: 1314-1325

  • DOI: 10.15252/emmm.201707726
  • Primary Citation of Related Structures:  
    5T08, 5T0B, 5T0D, 5T0E

  • PubMed Abstract: 

    • In June 2013, the first case of human infection with an avian H6N1 virus was reported in a Taiwanese woman. Although this was a single non-fatal case, the virus continues to circulate in Taiwanese poultry. As with any emerging avian virus that infects humans, there is concern that acquisition of human-type receptor specificity could enable transmission in the human population ...

    In June 2013, the first case of human infection with an avian H6N1 virus was reported in a Taiwanese woman. Although this was a single non-fatal case, the virus continues to circulate in Taiwanese poultry. As with any emerging avian virus that infects humans, there is concern that acquisition of human-type receptor specificity could enable transmission in the human population. Despite mutations in the receptor-binding pocket of the human H6N1 isolate, it has retained avian-type (NeuAcα2-3Gal) receptor specificity. However, we show here that a single nucleotide substitution, resulting in a change from Gly to Asp at position 225 (G225D), completely switches specificity to human-type (NeuAcα2-6Gal) receptors. Significantly, G225D H6 loses binding to chicken trachea epithelium and is now able to bind to human tracheal tissue. Structural analysis reveals that Asp225 directly interacts with the penultimate Gal of the human-type receptor, stabilizing human receptor binding.

    Organizational Affiliation: 

    Departments of Molecular Medicine & Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA wilson@scripps.edu jpaulson@scripps.edu.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HemagglutininA, C, E333H6N1 subtypeMutation(s): 1 
Gene Names: HA
UniProt
Find proteins for A0A0J9X268 (H6N1 subtype)
Explore A0A0J9X268 
Go to UniProtKB:  A0A0J9X268
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0J9X268
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA2 chainB, D, F180H6N1 subtypeMutation(s): 0 
Gene Names: HA
UniProt
Find proteins for A0A0J9X267 (H6N1 subtype)
Explore A0A0J9X267 
Go to UniProtKB:  A0A0J9X267
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0J9X267
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
I [auth E],
J [auth E]		2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 185.065α = 90
b = 98.364β = 126.48
c = 133.239γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR56 AI117675
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI114730

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2017-07-26
    Changes: Author supporting evidence, Database references
  • Version 1.2: 2017-09-13
    Changes: Database references
  • Version 1.3: 2017-11-22
    Changes: Refinement description
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary