1JSO

STRUCTURE OF AVIAN H5 HAEMAGGLUTININ BOUND TO LSTC RECEPTOR ANALOG

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

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Literature

X-ray structures of H5 avian and H9 swine influenza virus hemagglutinins bound to avian and human receptor analogs.

Ha, Y., Stevens, D.J., Skehel, J.J., Wiley, D.C.

(2001) Proc Natl Acad Sci U S A 98: 11181-11186

  • DOI: 10.1073/pnas.201401198
  • Primary Citation of Related Structures:  
    1JSO, 1JSN, 1JSI, 1JSH

  • PubMed Abstract: 

    • The three-dimensional structures of avian H5 and swine H9 influenza hemagglutinins (HAs) from viruses closely related to those that caused outbreaks of human disease in Hong Kong in 1997 and 1999 were determined bound to avian and human cell receptor ...

    The three-dimensional structures of avian H5 and swine H9 influenza hemagglutinins (HAs) from viruses closely related to those that caused outbreaks of human disease in Hong Kong in 1997 and 1999 were determined bound to avian and human cell receptor analogs. Emerging influenza pandemics have been accompanied by the evolution of receptor-binding specificity from the preference of avian viruses for sialic acid receptors in alpha2,3 linkage to the preference of human viruses for alpha2,6 linkages. The four new structures show that HA binding sites specific for human receptors appear to be wider than those preferring avian receptors and how avian and human receptors are distinguished by atomic contacts at the glycosidic linkage. alpha2,3-Linked sialosides bind the avian HA in a trans conformation to form an alpha2,3 linkage-specific motif, made by the glycosidic oxygen and 4-OH of the penultimate galactose, that is complementary to the hydrogen-bonding capacity of Gln-226, an avian-specific residue. alpha2,6-Linked sialosides bind in a cis conformation, exposing the glycosidic oxygen to solution and nonpolar atoms of the receptor to Leu-226, a human-specific residue. The new structures are compared with previously reported crystal structures of HA/sialoside complexes of the H3 subtype that caused the 1968 Hong Kong Influenza virus pandemic and analyzed in relation to HA sequences of all 15 subtypes and to receptor affinity data to make clearer how receptor-binding sites of HAs from avian viruses evolve as the virus adapts to humans.

    Organizational Affiliation: 

    Department of Molecular and Cellular Biology, Harvard University, 7 Divinity Avenue, Cambridge, MA 02138, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HAEMAGGLUTININ (HA1 CHAIN)A325Influenza A virusMutation(s): 0 
Find proteins for A5Z226 (Influenza A virus (strain A/Duck/Singapore/3/1997 H5N3))
Explore A5Z226 
Go to UniProtKB:  A5Z226
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HAEMAGGLUTININ (HA2 CHAIN)B176Influenza A virusMutation(s): 0 
Find proteins for A5Z226 (Influenza A virus (strain A/Duck/Singapore/3/1997 H5N3))
Explore A5Z226 
Go to UniProtKB:  A5Z226
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SIA
Query on SIA
Download CCD File 
A
N-acetyl-alpha-neuraminic acid
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N		 Ligand Interaction
NAG
Query on NAG
Download CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.902α = 90
b = 130.902β = 90
c = 254.409γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-26
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary