6D8D

The crystal structure of hemagglutinin from A/Hong Kong/125/2017 influenza virus in complex with LSTb


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Structural and Molecular Characterization of the Hemagglutinin from the Fifth-Epidemic-Wave A(H7N9) Influenza Viruses.

Yang, H.Carney, P.J.Chang, J.C.Guo, Z.Stevens, J.

(2018) J Virol 92

  • DOI: https://doi.org/10.1128/JVI.00375-18
  • Primary Citation of Related Structures:  
    6D7C, 6D7U, 6D8B, 6D8D

  • PubMed Abstract: 

    The avian influenza A(H7N9) virus continues to cause human infections in China and is a major ongoing public health concern. Five epidemic waves of A(H7N9) infection have occurred since 2013, and the recent fifth epidemic wave saw the emergence of two distinct lineages with elevated numbers of human infection cases and broader geographic distribution of viral diseases compared to the first four epidemic waves. Moreover, highly pathogenic avian influenza (HPAI) A(H7N9) viruses were also isolated during the fifth epidemic wave. Here, we present a detailed structural and biochemical analysis of the surface hemagglutinin (HA) antigen from viruses isolated during this recent epidemic wave. Results highlight that, compared to the 2013 virus HAs, the fifth-wave virus HAs remained a weak binder to human glycan receptor analogs. We also studied three mutations, V177K-K184T-G219S, that were recently reported to switch a 2013 A(H7N9) HA to human-type receptor specificity. Our results indicate that these mutations could also switch the H7 HA receptor preference to a predominantly human binding specificity for both fifth-wave H7 HAs analyzed in this study. IMPORTANCE The A(H7N9) viruses circulating in China are of great public health concern. Here, we report a molecular and structural study of the major surface proteins from several recent A(H7N9) influenza viruses. Our results improve the understanding of these evolving viruses and provide important information on their receptor preference that is central to ongoing pandemic risk assessment.


  • Organizational Affiliation

    Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemagglutinin HA1 chain
A, C, E
321Influenza A virusMutation(s): 0 
Gene Names: HA
UniProt
Find proteins for A0A2I7YV81 (Influenza A virus)
Explore A0A2I7YV81 
Go to UniProtKB:  A0A2I7YV81
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A2I7YV81
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Hemagglutinin HA2 chain
B, D, F
221Influenza A virusMutation(s): 0 
Gene Names: HA
UniProt
Find proteins for A0A218MY65 (Influenza A virus)
Explore A0A218MY65 
Go to UniProtKB:  A0A218MY65
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A218MY65
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-3)-[N-acetyl-alpha-neuraminic acid-(2-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
G, H
3N/A
Glycosylation Resources
GlyTouCan:  G66658UG
GlyCosmos:  G66658UG
GlyGen:  G66658UG
Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose
I
2N/A
Glycosylation Resources
GlyTouCan:  G00056MO
GlyCosmos:  G00056MO
GlyGen:  G00056MO
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SIA
Query on SIA

Download Ideal Coordinates CCD File 
Q [auth E]N-acetyl-alpha-neuraminic acid
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N
NAG
Query on NAG

Download Ideal Coordinates CCD File 
J [auth A]
L [auth B]
M [auth C]
O [auth D]
P [auth E]
J [auth A],
L [auth B],
M [auth C],
O [auth D],
P [auth E],
S [auth F]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
GAL
Query on GAL

Download Ideal Coordinates CCD File 
K [auth A],
N [auth C],
R [auth E]
beta-D-galactopyranose
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 203.571α = 90
b = 117.866β = 124.21
c = 119.86γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-30
    Type: Initial release
  • Version 1.1: 2018-06-13
    Changes: Data collection, Database references
  • Version 1.2: 2019-04-03
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-10-04
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description, Structure summary