1MWE

THE X-RAY STRUCTURE OF A COMPLEX OF TERN N9 INFLUENZA VIRUS NEURAMINIDASE COMPLEXED WITH SIALIC ACID AT 4 DEGREES C REVEALING A SECOND SIALIC ACID BINDING SITE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history. 


Literature

Structural evidence for a second sialic acid binding site in avian influenza virus neuraminidases.

Varghese, J.N., Colman, P.M., van Donkelaar, A., Blick, T.J., Sahasrabudhe, A., McKimm-Breschkin, J.L.

(1997) Proc Natl Acad Sci U S A 94: 11808-11812

  • DOI: https://doi.org/10.1073/pnas.94.22.11808
  • Primary Citation of Related Structures:  
    1MWE

  • PubMed Abstract: 

    The x-ray structure of a complex of sialic acid (Neu5Ac) with neuraminidase N9 subtype from A/tern/Australia/G70C/75 influenza virus at 4 degrees C has revealed the location of a second Neu5Ac binding site on the surface of the enzyme. At 18 degrees C, only the enzyme active site contains bound Neu5Ac. Neu5Ac binds in the second site in the chair conformation in a similar way to which it binds to hemagglutinin. The residues that interact with Neu5Ac at this second site are mostly conserved in avian strains, but not in human and swine strains, indicating that it has some as-yet-unknown biological function in birds.

    • Organizational Affiliation: 

    Biomolecular Research Institute, 343 Royal Parade, Parkville, 3052 Australia. jose.varghese@bioresi.com.au


Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NEURAMINIDASE388Influenza A virusMutation(s): 0 
EC: 3.2.1.18
UniProt
Find proteins for P03472 (Influenza A virus (strain A/Tern/Australia/G70C/1975 H11N9))
Explore P03472 
Go to UniProtKB:  P03472
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03472
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
9N-Glycosylation
Glycosylation Resources
GlyTouCan:  G68668TB
GlyCosmos:  G68668TB
GlyGen:  G68668TB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • Space Group: I 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 181.04α = 90
b = 181.04β = 90
c = 181.04γ = 90
Software Package:
Software NamePurpose
R-AXISdata collection
PROTEINdata reduction
X-PLORmodel building
X-PLORrefinement
R-AXISdata reduction
PROTEINdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-03-04
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Structure summary
  • Version 2.1: 2024-04-03
    Changes: Advisory, Data collection, Database references, Refinement description, Structure summary