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: 55.09 kDa 
• Atom Count: 3856 
• Residue Count: 486 
• Unique protein chains: 2

4LKH

The structure of hemagglutinin from a avian-origin H7N9 influenza virus (A/Shanghai/1/2013) in complex with human receptor analog 6'SLNLN

• DOI: 10.2210/pdb4LKH/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2013-07-07 Released: 2013-11-06 
• Deposition Author(s): Shi, Y., Zhang, W., Wang, F., Qi, J., Song, H., Wu, Y., Gao, F., Zhang, Y., Fan, Z., Gong, W., Wang, D., Shu, Y., Wang, Y., Yan, J., Gao, G.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Free: 0.256 
• R-Value Work: 0.217 
• R-Value Observed: 0.219 

Literature

Structures and receptor binding of hemagglutinins from human-infecting H7N9 influenza viruses

Shi, Y., Zhang, W., Wang, F., Qi, J., Wu, Y., Song, H., Gao, F., Bi, Y., Zhang, Y., Fan, Z., Qin, C., Sun, H., Liu, J., Haywood, J., Liu, W., Gong, W., Wang, D., Shu, Y., Wang, Y., Yan, J., Gao, G.F.

(2013) Science 342: 243-247

• PubMed: 24009358 
• DOI: 10.1126/science.1242917
• Primary Citation of Related Structures:  
  4LCX, 4LKK, 4LKG, 4LKH, 4LKI, 4LKJ, 4KOL, 4KOM, 4KON


• PubMed Abstract: 
  

An avian-origin human-infecting influenza (H7N9) virus was recently identified in China. We have evaluated the viral hemagglutinin (HA) receptor-binding properties of two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature residue Gln(226)) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature residue Leu(226)). We found that SH-H7N9 HA preferentially binds the avian receptor analog, whereas AH-H7N9 HA binds both avian and human receptor analogs. Furthermore, an AH-H7N9 mutant HA (Leu(226) → Gln) was found to exhibit dual receptor-binding property, indicating that other amino acid substitutions contribute to the receptor-binding switch. The structures of SH-H7N9 HA, AH-H7N9 HA, and its mutant in complex with either avian or human receptor analogs show how AH-H7N9 can bind human receptors while still retaining the avian receptor-binding property.

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Organizational Affiliation: 

Research Network of Immunity and Health, Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
hemagglutinin	A	316	Influenza A virus	Mutation(s): 0  Gene Names: HA
Find proteins for V5IRV0 (Influenza A virus) Explore V5IRV0  Go to UniProtKB:  V5IRV0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
hemagglutinin	B	170	Influenza A virus	Mutation(s): 0  Gene Names: HA
Find proteins for V5IRU7 (Influenza A virus) Explore V5IRU7  Go to UniProtKB:  V5IRU7

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SIA	A	N-acetyl-alpha-neuraminic acid C11 H19 N O9 SQVRNKJHWKZAKO-YRMXFSIDSA-N
NAG	A, B	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Free: 0.256 
• R-Value Work: 0.217 
• R-Value Observed: 0.219 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.398	α = 90
b = 116.398	β = 90
c = 294.636	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-07-07 
• Released Date: 2013-11-06 
Deposition Author(s): Shi, Y., Zhang, W., Wang, F., Qi, J., Song, H., Wu, Y., Gao, F., Zhang, Y., Fan, Z., Gong, W., Wang, D., Shu, Y., Wang, Y., Yan, J., Gao, G.F.

Revision History 

• Version 1.0: 2013-11-06
  Type: Initial release
  
• Version 1.1: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Structure summary