4KOM

The structure of hemagglutinin from avian-origin H7N9 influenza virus in complex with avian receptor analog 3'SLNLN (NeuAcα2-3Galβ1-4GlcNAcβ1-3Galβ1-4Glc)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 

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This is version 2.0 of the entry. See complete history


Literature

Structures and receptor binding of hemagglutinins from human-infecting H7N9 influenza viruses.

Shi, Y.Zhang, W.Wang, F.Qi, J.Wu, Y.Song, H.Gao, F.Bi, Y.Zhang, Y.Fan, Z.Qin, C.Sun, H.Liu, J.Haywood, J.Liu, W.Gong, W.Wang, D.Shu, Y.Wang, Y.Yan, J.Gao, G.F.

(2013) Science 342: 243-247

  • DOI: 10.1126/science.1242917
  • Primary Citation of Related Structures:  
    4KOL, 4KOM, 4KON, 4LCX, 4LKG, 4LKH, 4LKI, 4LKJ, 4LKK

  • PubMed Abstract: 
  • An avian-origin human-infecting influenza (H7N9) virus was recently identified in China. We have evaluated the viral hemagglutinin (HA) receptor-binding properties of two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature residue Gln(226)) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature residue Leu(226)) ...

    An avian-origin human-infecting influenza (H7N9) virus was recently identified in China. We have evaluated the viral hemagglutinin (HA) receptor-binding properties of two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature residue Gln(226)) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature residue Leu(226)). We found that SH-H7N9 HA preferentially binds the avian receptor analog, whereas AH-H7N9 HA binds both avian and human receptor analogs. Furthermore, an AH-H7N9 mutant HA (Leu(226) → Gln) was found to exhibit dual receptor-binding property, indicating that other amino acid substitutions contribute to the receptor-binding switch. The structures of SH-H7N9 HA, AH-H7N9 HA, and its mutant in complex with either avian or human receptor analogs show how AH-H7N9 can bind human receptors while still retaining the avian receptor-binding property.


    Organizational Affiliation

    Research Network of Immunity and Health, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA1A314Influenza A virusMutation(s): 0 
Gene Names: HA
UniProt
Find proteins for V5IRU4 (Influenza A virus)
Explore V5IRU4 
Go to UniProtKB:  V5IRU4
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA2B169Influenza A virusMutation(s): 0 
Gene Names: HA
UniProt
Find proteins for V5IRU3 (Influenza A virus)
Explore V5IRU3 
Go to UniProtKB:  V5IRU3
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-beta-D-galactopyranoseC4N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G69440RD
GlyCosmos:  G69440RD
GlyGen:  G69440RD
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
D [auth A], E [auth A], F [auth B]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: 2.60 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.06α = 90
b = 117.06β = 90
c = 296.429γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-11-06
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary