Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Hetero 6-mer - A3B 

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

Macromolecule Content

• Total Structure Weight: 59.12 kDa 
• Atom Count: 4154 
• Residue Count: 498 
• Unique protein chains: 2

5E32

Crystal structure of H5 hemagglutinin mutant (N224K, Q226L, N158D and L133a deletion) from the influenza virus A/chicken/Vietnam/NCVD-093/2008 (H5N1)

• DOI: 10.2210/pdb5E32/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus (A/chicken/Vietnam/NCVD-093/2008(H5N1))
• Expression System: Trichoplusia ni
• Mutation(s): Yes 


• Deposited: 2015-10-01 Released: 2015-12-02 
• Deposition Author(s): Zhu, X., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.232 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 

Literature

Structural Basis for a Switch in Receptor Binding Specificity of Two H5N1 Hemagglutinin Mutants.

Zhu, X., Viswanathan, K., Raman, R., Yu, W., Sasisekharan, R., Wilson, I.A.

(2015) Cell Rep 13: 1683-1691

• PubMed: 26586437 
• DOI: 10.1016/j.celrep.2015.10.027
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Avian H5N1 influenza viruses continue to spread in wild birds and domestic poultry with sporadic infection in humans. Receptor binding specificity changes are a prerequisite for H5N1 viruses and other zoonotic viruses to be transmitted among humans. Previous reported hemagglutinin (HA) mutants from ferret-transmissible H5N1 viruses of A/Vietnam/1203/2004 and A/Indonesia/5/2005 showed slightly increased, but still very weak, binding to human receptors. From mutagenesis and glycan array studies, we previously identified two H5N1 HA mutants that could more effectively switch receptor specificity to human-like α2-6-linked sialosides with avidity comparable to wild-type H5 HA binding to avian-like α2-3-linked sialosides. Here, crystal structures of these two H5 HA mutants free and in complex with human and avian glycan receptor analogs reveal the structural basis for their preferential binding to human receptors. These findings suggest continuous surveillance should be maintained to monitor and assess human-to-human transmission potential of H5N1 viruses.

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Organizational Affiliation: 

Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA; Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Hemagglutinin	A	333	Influenza A virus (A/chicken/Vietnam/NCVD-093/2008(H5N1))	Mutation(s): 3  Gene Names: HA
Find proteins for C4P282 (Influenza A virus) Go to UniProtKB:  C4P282

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Hemagglutinin	B	180	Influenza A virus (A/chicken/Vietnam/NCVD-093/2008(H5N1))	Mutation(s): 0  Gene Names: HA
Find proteins for C4P282 (Influenza A virus) Go to UniProtKB:  C4P282

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.232 
• R-Value Work: 0.197 
• R-Value Observed: 0.199 
• Space Group: P 6

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 133.046	α = 90
b = 133.046	β = 90
c = 134.693	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-10-01 
• Released Date: 2015-12-02 
Deposition Author(s): Zhu, X., Wilson, I.A.

Revision History 

• Version 1.0: 2015-12-02
  Type: Initial release
  
• Version 1.1: 2015-12-09
  Changes: Database references