4GMS

Crystal structure of heterosubtypic Fab S139/1 in complex with influenza A H3 hemagglutinin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

wwPDB Validation 3D Report Full Report



Literature

Heterosubtypic antibody recognition of the influenza virus hemagglutinin receptor binding site enhanced by avidity.

Lee, P.S.Yoshida, R.Ekiert, D.C.Sakai, N.Suzuki, Y.Takada, A.Wilson, I.A.

(2012) Proc Natl Acad Sci U S A 109: 17040-17045

  • DOI: 10.1073/pnas.1212371109
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Continual and rapid mutation of seasonal influenza viruses by antigenic drift necessitates the almost annual reformulation of flu vaccines, which may offer little protection if the match to the dominant circulating strain is poor. S139/1 is a cross-r ...

    Continual and rapid mutation of seasonal influenza viruses by antigenic drift necessitates the almost annual reformulation of flu vaccines, which may offer little protection if the match to the dominant circulating strain is poor. S139/1 is a cross-reactive antibody that neutralizes multiple HA strains and subtypes, including those from H1N1 and H3N2 viruses that currently infect humans. The crystal structure of the S139/1 Fab in complex with the HA from the A/Victoria/3/1975 (H3N2) virus reveals that the antibody targets highly conserved residues in the receptor binding site and contacts antigenic sites A, B, and D. Binding and plaque reduction assays show that the monovalent Fab alone can protect against H3 strains, but the enhanced avidity from binding of bivalent IgG increases the breadth of neutralization to additional strains from the H1, H2, H13, and H16 subtypes. Thus, antibodies making relatively low affinity Fab interactions with the receptor binding site can have significant antiviral activity when enhanced by avidity through bivalent interactions of the IgG, thereby extending the breadth of binding and neutralization to highly divergent influenza virus strains and subtypes.


    Organizational Affiliation

    Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemagglutinin HA1 chainA, C, E320Influenza A virus (A/Victoria/3/1975(H3N2))Mutation(s): 0 
Gene Names: HA
Find proteins for P03435 (Influenza A virus (strain A/Victoria/3/1975 H3N2))
Explore P03435 
Go to UniProtKB:  P03435
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hemagglutinin HA2 chainB, D, F176Influenza A virus (A/Victoria/3/1975(H3N2))Mutation(s): 0 
Gene Names: HA
Find proteins for P03435 (Influenza A virus (strain A/Victoria/3/1975 H3N2))
Explore P03435 
Go to UniProtKB:  P03435
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab S139/1 light chainL, M, N214Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Fab S139/1 heavy chainH, I, J225Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Oligosaccharides
Entity ID: 5
MoleculeChainsChain Length2D Diagram Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G, O, P, U, X
2 N-Glycosylation
Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation
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
K, Q, V
5 N-Glycosylation
Entity ID: 7
MoleculeChainsChain Length2D Diagram Glycosylation
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
R, T
3 N-Glycosylation
Entity ID: 8
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
S, W
4 N-Glycosylation
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A, B, C, D, F, I, J
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
PG4
Query on PG4

Download CCD File 
E
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A, B, C, D, E, F, H, I, J
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
B, D
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
H,I,JL-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 225.51α = 90
b = 112.94β = 118.76
c = 196.97γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-10-17
    Changes: Database references
  • Version 1.2: 2012-10-31
    Changes: Database references
  • Version 2.0: 2019-12-25
    Changes: Database references, Derived calculations, Polymer sequence
  • Version 3.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary