Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Hetero 6-mer - A3B3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 57393.10 
• Atom Count: 3947 
• Residue Count: 492 
• Unique protein chains: 2

4BGW

Crystal Structure of H5 (VN1194) Influenza Haemagglutinin

• DOI: 10.2210/pdb4BGW/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus


• Deposited: 2013-03-29 Released: 2013-04-24 
• Deposition Author(s): Xiong, X., Coombs, P., Martin, S.R., Liu, J., Xiao, H., McCauley, J.W., Locher, K., Walker, P.A., Collins, P.J., Kawaoka, Y., Skehel, J.J., Gamblin, S.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 0.258 
• R-Value Work: 0.208 

Literature

Receptor Binding by a Ferret-Transmissible H5 Avian Influenza Virus.

Xiong, X., Coombs, P., R Martin, S., Liu, J., Xiao, H., Mccauley, J.W., Locher, K., Walker, P.A., Collins, P.J., Kawaoka, Y., Skehel, J.J., Gamblin, S.J.

(2013) Nature 497: 392

• PubMed: 23615615 
• DOI: 10.1038/nature12144
• Primary Citation of Related Structures:  
  4BH4, 4BH3, 4BH2, 4BH1, 4BH0, 4BGZ, 4BGY, 4BGX


• PubMed Abstract: 
  

Cell-surface-receptor binding by influenza viruses is a key determinant of their transmissibility, both from avian and animal species to humans as well as from human to human. Highly pathogenic avian H5N1 viruses that are a threat to public health have been observed to acquire affinity for human receptors, and transmissible-mutant-selection experiments have identified a virus that is transmissible in ferrets, the generally accepted experimental model for influenza in humans. Here, our quantitative biophysical measurements of the receptor-binding properties of haemagglutinin (HA) from the transmissible mutant indicate a small increase in affinity for human receptor and a marked decrease in affinity for avian receptor. From analysis of virus and HA binding data we have derived an algorithm that predicts virus avidity from the affinity of individual HA-receptor interactions. It reveals that the transmissible-mutant virus has a 200-fold preference for binding human over avian receptors. The crystal structure of the transmissible-mutant HA in complex with receptor analogues shows that it has acquired the ability to bind human receptor in the same folded-back conformation as seen for HA from the 1918, 1957 (ref. 4), 1968 (ref. 5) and 2009 (ref. 6) pandemic viruses. This binding mode is substantially different from that by which non-transmissible wild-type H5 virus HA binds human receptor. The structure of the complex also explains how the change in preference from avian to human receptors arises from the Gln226Leu substitution, which facilitates binding to human receptor but restricts binding to avian receptor. Both features probably contribute to the acquisition of transmissibility by this mutant virus.

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Organizational Affiliation: 

MRC National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEMAGGLUTININ	A	326	Influenza A virus	Mutation(s): 0  Gene Names: HA
Find proteins for Q6DQ34 (Influenza A virus) Go to UniProtKB:  Q6DQ34

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
HEMAGGLUTININ	B	166	Influenza A virus	Mutation(s): 0  Gene Names: HA
Find proteins for Q6DQ34 (Influenza A virus) Go to UniProtKB:  Q6DQ34

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
EPE	B	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID HEPES C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N
NAG	A, B	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 0.258 
• R-Value Work: 0.208 
• Space Group: H 3 2

Unit Cell:

Length (Å)	Angle (°)
a = 101.240	α = 90.00
b = 101.240	β = 90.00
c = 451.320	γ = 120.00

Software Package:

Software Name	Purpose
PHASER	phasing
SCALA	data scaling
REFMAC	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-03-29 
• Released Date: 2013-04-24 
• Deposition Author(s): Xiong, X., Coombs, P., Martin, S.R., Liu, J., Xiao, H., McCauley, J.W., Locher, K., Walker, P.A., Collins, P.J., Kawaoka, Y., Skehel, J.J., Gamblin, S.J.

Revision History 

• Version 1.0: 2013-04-24
  Type: Initial release
• Version 1.1: 2013-05-01
  Type: Structure summary
• Version 1.2: 2013-05-08
  Type: Database references, Refinement description
• Version 1.3: 2013-05-15
  Type: Database references
• Version 1.4: 2013-05-22
  Type: Database references