5BQY

Crystal structure of hemagglutinin of A/Chicken/Guangdong/S1311/2010 (H6N6) in complex with avian-like receptor LSTa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.78 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and Functional Studies of Influenza Virus A/H6 Hemagglutinin.

Ni, F.Kondrashkina, E.Wang, Q.

(2015) Plos One 7: e0134576-e0134576

  • DOI: 10.1371/journal.pone.0134576
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In June 2013, the first human infection by avian influenza A(H6N1) virus was reported in Taiwan. This incident raised the concern for possible human epidemics and pandemics from H6 viruses. In this study, we performed structural and functional invest ...

    In June 2013, the first human infection by avian influenza A(H6N1) virus was reported in Taiwan. This incident raised the concern for possible human epidemics and pandemics from H6 viruses. In this study, we performed structural and functional investigation on the hemagglutinin (HA) proteins of the human-infecting A/Taiwan/2/2013(H6N1) (TW H6) virus and an avian A/chicken/Guangdong/S1311/2010(H6N6) (GD H6) virus that transmitted efficiently in guinea pigs. Our results revealed that in the presence of HA1 Q226, the triad of HA1 S137, E190 and G228 in GD H6 HA allows the binding to both avian- and human-like receptors with a slight preference for avian receptors. Its conservation among the majority of H6 HAs provides an explanation for the broader host range of this subtype. Furthermore, the triad of N137, V190 and S228 in TW H6 HA may alleviate the requirement for a hydrophobic residue at HA1 226 of H2 and H3 HAs when binding to human-like receptors. Consequently, TW H6 HA has a slight preference for human receptors, thus may represent an intermediate towards a complete human adaptation. Importantly, the triad observed in TW H6 HA is detected in 74% H6 viruses isolated from Taiwan in the past 14 years, suggesting an elevated threat of H6 viruses from this region to human health. The novel roles of the triad at HA1 137, 190 and 228 of H6 HA in binding to receptors revealed here may also be used by other HA subtypes to achieve human adaptation, which needs to be further tested in laboratory and closely monitored in field surveillance.


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEMAGGLUTININ HA1 CHAIN
A, C, E
324Influenza A virusMutation(s): 0 
Gene Names: HA
Find proteins for A0A067Z050 (Influenza A virus)
Go to UniProtKB:  A0A067Z050
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HEMAGGLUTININ HA2 CHAIN
B, D, F
191Influenza A virusMutation(s): 0 
Gene Names: HA
Find proteins for A0A067YZ73 (Influenza A virus)
Go to UniProtKB:  A0A067YZ73
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GAL
Query on GAL

Download SDF File 
Download CCD File 
A, E
BETA-D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, E, F
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
SIA
Query on SIA

Download SDF File 
Download CCD File 
A, E
O-SIALIC ACID
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.78 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.350α = 90.00
b = 137.770β = 90.00
c = 199.100γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
PHENIXrefinement
MOSFLMdata reduction
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-12
    Type: Initial release