Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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: 55.37 kDa 
• Atom Count: 4195 
• Residue Count: 491 
• Unique protein chains: 2

3EYK

Structure of Influenza Haemagglutinin in complex with an inhibitor of membrane fusion

• DOI: 10.2210/pdb3EYK/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus
• Mutation(s): No 


• Deposited: 2008-10-21 Released: 2009-01-13 
• Deposition Author(s): Russell, R.J., Kerry, P.S., Stevens, D.J., Steinhauer, D.A., Martin, S.R., Gamblin, S.J., Skehel, J.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.248 
• R-Value Work: 0.194 
• R-Value Observed: 0.197 

Literature

Structure of influenza hemagglutinin in complex with an inhibitor of membrane fusion

Russell, R.J., Kerry, P.S., Stevens, D.J., Steinhauer, D.A., Martin, S.R., Gamblin, S.J., Skehel, J.J.

(2008) Proc Natl Acad Sci U S A 105: 17736-17741

• PubMed: 19004788 
• DOI: 10.1073/pnas.0807142105
• Primary Citation of Related Structures:  
  3EYJ, 3EYK, 3EYM


• PubMed Abstract: 
  

The influenza surface glycoprotein hemagglutinin (HA) is a potential target for antiviral drugs because of its key roles in the initial stages of infection: receptor binding and the fusion of virus and cell membranes. The structure of HA in complex with a known inhibitor of membrane fusion and virus infectivity, tert-butyl hydroquinone (TBHQ), shows that the inhibitor binds in a hydrophobic pocket formed at an interface between HA monomers. Occupation of this site by TBHQ stabilizes the neutral pH structure through intersubunit and intrasubunit interactions that presumably inhibit the conformational rearrangements required for membrane fusion. The nature of the binding site suggests routes for the chemical modification of TBHQ that could lead to the development of more potent inhibitors of membrane fusion and potential anti-influenza drugs.

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Organizational Affiliation: 

Interdisciplinary Center for Human and Avian Influenza Research, School of Biology, University of St. Andrews, Fife KY16 9ST, United Kingdom. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin HA1 chain	A	323	Influenza A virus	Mutation(s): 0
Find proteins for P26137 (Influenza A virus (strain A/Mallard/Astrakhan/244/1982 H14N6)) Explore P26137  Go to UniProtKB:  P26137

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin HA2 chain	B	172	Influenza A virus	Mutation(s): 0
Find proteins for P26137 (Influenza A virus (strain A/Mallard/Astrakhan/244/1982 H14N6)) Explore P26137  Go to UniProtKB:  P26137

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EYK	B	2-tert-butylbenzene-1,4-diol C10 H14 O2 BGNXCDMCOKJUMV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.248 
• R-Value Work: 0.194 
• R-Value Observed: 0.197 
• Space Group: P 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 139.098	α = 90
b = 139.098	β = 90
c = 139.098	γ = 90

Software Package:

Software Name	Purpose
CrystalClear	data collection
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-10-21 
• Released Date: 2009-01-13 
Deposition Author(s): Russell, R.J., Kerry, P.S., Stevens, D.J., Steinhauer, D.A., Martin, S.R., Gamblin, S.J., Skehel, J.J.

Revision History 

• Version 1.0: 2009-01-13
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance