3GBM

Crystal Structure of Fab CR6261 in Complex with a H5N1 influenza virus hemagglutinin.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 

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Literature

Antibody recognition of a highly conserved influenza virus epitope.

Ekiert, D.C., Bhabha, G., Elsliger, M.A., Friesen, R.H., Jongeneelen, M., Throsby, M., Goudsmit, J., Wilson, I.A.

(2009) Science 324: 246-251

  • DOI: https://doi.org/10.1126/science.1171491
  • Primary Citation of Related Structures:  
    3GBM, 3GBN

  • PubMed Abstract: 

    • Influenza virus presents an important and persistent threat to public health worldwide, and current vaccines provide immunity to viral isolates similar to the vaccine strain. High-affinity antibodies against a conserved epitope could provide immunity to the diverse influenza subtypes and protection against future pandemic viruses ...

    Influenza virus presents an important and persistent threat to public health worldwide, and current vaccines provide immunity to viral isolates similar to the vaccine strain. High-affinity antibodies against a conserved epitope could provide immunity to the diverse influenza subtypes and protection against future pandemic viruses. Cocrystal structures were determined at 2.2 and 2.7 angstrom resolutions for broadly neutralizing human antibody CR6261 Fab in complexes with the major surface antigen (hemagglutinin, HA) from viruses responsible for the 1918 H1N1 influenza pandemic and a recent lethal case of H5N1 avian influenza. In contrast to other structurally characterized influenza antibodies, CR6261 recognizes a highly conserved helical region in the membrane-proximal stem of HA1 and HA2. The antibody neutralizes the virus by blocking conformational rearrangements associated with membrane fusion. The CR6261 epitope identified here should accelerate the design and implementation of improved vaccines that can elicit CR6261-like antibodies, as well as antibody-based therapies for the treatment of influenza.

    Organizational Affiliation: 

    Department of Molecular Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin
A, C
334Influenza A virus (A/Viet Nam/1203/2004(H5N1))Mutation(s): 0 
Gene Names: HA, Hemagglutinin (HA)
UniProt
Find proteins for Q6DQ33 (Influenza A virus)
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Go to UniProtKB:  Q6DQ33
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6DQ33
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin
B, D
177Influenza A virus (A/Viet Nam/1203/2004(H5N1))Mutation(s): 0 
Gene Names: HA, Hemagglutinin (HA)
UniProt
Find proteins for Q6DQ33 (Influenza A virus)
Explore Q6DQ33 
Go to UniProtKB:  Q6DQ33
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Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6DQ33
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
antibody (Fab)E [auth H],
G [auth I]		226Homo sapiensMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
antibody (Fab)F [auth L],
H [auth M]		221Homo sapiensMutation(s): 0 
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Oligosaccharides

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Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseI [auth E],
J [auth F]		2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 202.761α = 90
b = 202.761β = 90
c = 202.761γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary