4HF5

Crystal structure of Fab 8F8 in complex a H2N2 influenza virus hemagglutinin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 

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


Literature

A recurring motif for antibody recognition of the receptor-binding site of influenza hemagglutinin.

Xu, R., Krause, J.C., McBride, R., Paulson, J.C., Crowe, J.E., Wilson, I.A.

(2013) Nat Struct Mol Biol 20: 363-370

  • DOI: 10.1038/nsmb.2500
  • Primary Citation of Related Structures:  
    4HF5, 4HFU, 4HG4

  • PubMed Abstract: 

    • Influenza virus hemagglutinin (HA) mediates receptor binding and viral entry during influenza infection. The development of receptor analogs as viral-entry blockers has not been successful, which suggests that sialic acid may not be an ideal scaffold to obtain broad, potent HA inhibitors ...

    Influenza virus hemagglutinin (HA) mediates receptor binding and viral entry during influenza infection. The development of receptor analogs as viral-entry blockers has not been successful, which suggests that sialic acid may not be an ideal scaffold to obtain broad, potent HA inhibitors. Here, we report crystal structures of Fab fragments from three human antibodies that neutralize the 1957 pandemic H2N2 influenza virus in complex with H2 HA. All three antibodies use an aromatic residue to plug a conserved cavity in the HA receptor-binding site. Each antibody interacts with the absolutely conserved HA1 Trp153 at the cavity base through π-π stacking with the signature Phe54 of two VH1-69-encoded antibodies or a tyrosine from HCDR3 in the other antibody. This highly conserved interaction can be used as a starting point to design inhibitors targeting this conserved hydrophobic pocket in influenza viruses.

    Organizational Affiliation: 

    Department of Integrative Structural and Computational Biology, Scripps Research Institute, La Jolla, California, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA1A327Influenza A virus (A/Japan/305+/1957(H2N2))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for C7S226 (Influenza A virus (strain A/Japan/305/1957 H2N2))
Explore C7S226 
Go to UniProtKB:  C7S226
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC7S226
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA2B174Influenza A virus (A/Japan/305+/1957(H2N2))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for C7S226 (Influenza A virus (strain A/Japan/305/1957 H2N2))
Explore C7S226 
Go to UniProtKB:  C7S226
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC7S226
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fab 8F8 heavy chainC [auth H]233Homo sapiensMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Fab 8F8 light chainD [auth L]218Homo sapiensMutation(s): 0 
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Oligosaccharides

Help

Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D 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-glucopyranoseE [auth C]4N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22573RC
GlyCosmos:  G22573RC
GlyGen:  G22573RC
Entity ID: 6
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF [auth D]2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.615α = 90
b = 136.615β = 90
c = 142.134γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2012-10-04 
  • Released Date: 2013-02-13 
    • Deposition Author(s): Xu, R., Wilson, I.A.

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-13
    Type: Initial release
  • Version 1.1: 2013-05-22
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary