2YPG

Haemagglutinin of 1968 Human H3N2 Virus in Complex with Human Receptor Analogue LSTc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Evolution of the Receptor Binding Properties of the Influenza A(H3N2) Hemagglutinin.

Lin, Y.P.Xiong, X.Wharton, S.A.Martin, S.R.Coombs, P.J.Vachieri, S.G.Christodoulou, E.Walker, P.A.Liu, J.Skehel, J.J.Gamblin, S.J.Hay, A.J.Daniels, R.S.Mccauley, J.W.

(2012) Proc.Natl.Acad.Sci.USA 109: 21474

  • DOI: 10.1073/pnas.1218841110
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The hemagglutinin (HA) of influenza A(H3N2) virus responsible for the 1968 influenza pandemic derived from an avian virus. On introduction into humans, its receptor binding properties had changed from a preference for avian receptors (α2,3-linked sia ...

    The hemagglutinin (HA) of influenza A(H3N2) virus responsible for the 1968 influenza pandemic derived from an avian virus. On introduction into humans, its receptor binding properties had changed from a preference for avian receptors (α2,3-linked sialic acid) to a preference for human receptors (α2,6-linked sialic acid). By 2001, the avidity of human H3 viruses for avian receptors had declined, and since then the affinity for human receptors has also decreased significantly. These changes in receptor binding, which correlate with increased difficulties in virus propagation in vitro and in antigenic analysis, have been assessed by virus hemagglutination of erythrocytes from different species and quantified by measuring virus binding to receptor analogs using surface biolayer interferometry. Crystal structures of HA-receptor analog complexes formed with HAs from viruses isolated in 2004 and 2005 reveal significant differences in the conformation of the 220-loop of HA1, relative to the 1968 structure, resulting in altered interactions between the HA and the receptor analog that explain the changes in receptor affinity. Site-specific mutagenesis shows the HA1 Asp-225→Asn substitution to be the key determinant of the decreased receptor binding in viruses circulating since 2005. Our results indicate that the evolution of human influenza A(H3N2) viruses since 1968 has produced a virus with a low propensity to bind human receptor analogs, and this loss of avidity correlates with the marked reduction in A(H3N2) virus disease impact in the last 10 y.


    Organizational Affiliation

    Division of Virology, Medical Research Council National Institute for Medical Research, London NW7 1AA, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEMAGGLUTININ HA1 CHAIN
A, C, E
328Influenza A virus (strain A/Aichi/2/1968 H3N2)Mutation(s): 0 
Gene Names: HA
Find proteins for P03437 (Influenza A virus (strain A/Aichi/2/1968 H3N2))
Go to UniProtKB:  P03437
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HEMAGGLUTININ HA2 CHAIN
B, D, F
175Influenza A virus (strain A/Aichi/2/1968 H3N2)Mutation(s): 0 
Gene Names: HA
Find proteins for P03437 (Influenza A virus (strain A/Aichi/2/1968 H3N2))
Go to UniProtKB:  P03437
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BGC
Query on BGC

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Download CCD File 
A, E
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
GAL
Query on GAL

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

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Download CCD File 
A, C, E
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
FLC
Query on FLC

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Download CCD File 
A, B, C, D, E, F
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
NAG
Query on NAG

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

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Download CCD File 
A
BETA-L-FUCOSE
6-DEOXY-BETA-L-GALACTOSE
C6 H12 O5
SHZGCJCMOBCMKK-KGJVWPDLSA-N
 Ligand Interaction
SIA
Query on SIA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.177 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 160.767α = 90.00
b = 160.767β = 90.00
c = 177.210γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-07
    Type: Initial release
  • Version 1.1: 2012-12-26
    Type: Database references, Structure summary
  • Version 1.2: 2013-01-16
    Type: Database references