4LKK

The structure of hemagglutinin L226Q mutant (H3 numbering) from a avian-origin H7N9 influenza virus (A/Anhui/1/2013) in complex with human receptor analog 6'SLNLN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 

Starting Model: experimental
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This is version 2.2 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: https://doi.org/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)). 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
hemagglutinin314Influenza A virusMutation(s): 0 
UniProt
Find proteins for V5IRV5 (Influenza A virus)
Explore V5IRV5 
Go to UniProtKB:  V5IRV5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupV5IRV5
Glycosylation
Glycosylation Sites: 2
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
hemagglutinin168Influenza A virusMutation(s): 0 
UniProt
Find proteins for V5IRV2 (Influenza A virus)
Explore V5IRV2 
Go to UniProtKB:  V5IRV2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupV5IRV2
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranose
C
2N/A
Glycosylation Resources
GlyTouCan:  G63069TR
GlyCosmos:  G63069TR
GlyGen:  G63069TR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.143α = 90
b = 117.143β = 90
c = 297.664γ = 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: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-11-08
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 2.2: 2024-10-16
    Changes: Structure summary