4UNX

Structure of the A_Equine_Newmarket_2_93 H3 haemagglutinin in complex with 3SLN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.354 
  • R-Value Work: 0.319 
  • R-Value Observed: 0.321 

Starting Model: experimental
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This is version 2.1 of the entry. See complete history


Literature

Recent Evolution of Equine Influenza and the Origin of Canine Influenza.

Collins, P.J.Vachieri, S.G.Haire, L.F.Ogrodowicz, R.W.Martin, S.R.Walker, P.A.Xiong, X.Gamblin, S.J.Skehel, J.J.

(2014) Proc Natl Acad Sci U S A 111: 11175

  • DOI: https://doi.org/10.1073/pnas.1406606111
  • Primary Citation of Related Structures:  
    4UNW, 4UNX, 4UNY, 4UNZ, 4UO0, 4UO1, 4UO2, 4UO3, 4UO4, 4UO5, 4UO6, 4UO7, 4UO8, 4UO9, 4UOA

  • PubMed Abstract: 

    In 2004 an hemagglutinin 3 neuraminidase 8 (H3N8) equine influenza virus was transmitted from horses to dogs in Florida and subsequently spread throughout the United States and to Europe. To understand the molecular basis of changes in the antigenicity of H3 hemagglutinins (HAs) that have occurred during virus evolution in horses, and to investigate the role of HA in the equine to canine cross-species transfer, we used X-ray crystallography to determine the structures of the HAs from two antigenically distinct equine viruses and from a canine virus. Structurally all three are very similar with the majority of amino acid sequence differences between the two equine HAs located on the virus membrane-distal molecular surface. HAs of canine viruses are distinct in containing a Trp-222 → Leu substitution in the receptor binding site that influences specificity for receptor analogs. In the fusion subdomain of canine and recent equine virus HAs a unique difference is observed by comparison with all other HAs examined to date. Analyses of site-specific mutant HAs indicate that a single amino acid substitution, Thr-30 → Ser, influences interactions between N-terminal and C-terminal regions of the subdomain that are important in the structural changes required for membrane fusion activity. Both structural modifications may have facilitated the transmission of H3N8 influenza from horses to dogs.


  • Organizational Affiliation

    Divisions of Virology,Molecular Structure, and.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
H3 HAEMAGGLUTININ HA1 CHAIN
A, C, E
323Influenza A virus (A/eq/Newmarket/93/(H3N8))Mutation(s): 0 
UniProt
Find proteins for Q82847 (Influenza A virus)
Explore Q82847 
Go to UniProtKB:  Q82847
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ82847
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
H3 HAEMAGGLUTININ HA2 CHAIN
B, D, F
173Influenza A virus (A/eq/Newmarket/93/(H3N8))Mutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G, H, L, M, P
G, H, L, M, P, Q
2N/A
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
I, R
5N/A
Glycosylation Resources
GlyTouCan:  G22768VO
GlyCosmos:  G22768VO
GlyGen:  G22768VO
Entity ID: 5
MoleculeChains Length2D Diagram Glycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
J
3N/A
Glycosylation Resources
GlyTouCan:  G00065MO
GlyCosmos:  G00065MO
GlyGen:  G00065MO
Entity ID: 6
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose
K, O, S
2N/A
Glycosylation Resources
GlyTouCan:  G86851RC
GlyCosmos:  G86851RC
GlyGen:  G86851RC
Entity ID: 7
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
N
4N/A
Glycosylation Resources
GlyTouCan:  G22573RC
GlyCosmos:  G22573RC
GlyGen:  G22573RC
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.354 
  • R-Value Work: 0.319 
  • R-Value Observed: 0.321 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.485α = 90
b = 102.247β = 90
c = 228.371γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata 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: 2014-07-23
    Type: Initial release
  • Version 1.1: 2014-08-13
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary
  • Version 2.1: 2024-01-10
    Changes: Data collection, Database references, Refinement description, Structure summary