7QTU

Structural biology of the NS1 avian influenza protein subversion on the Scribble cell polarity module


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.84 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.252 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Basis of the Avian Influenza NS1 Protein Interactions with the Cell Polarity Regulator Scribble.

Javorsky, A.Humbert, P.O.Kvansakul, M.

(2022) Viruses 14

  • DOI: https://doi.org/10.3390/v14030583
  • Primary Citation of Related Structures:  
    7QTO, 7QTP, 7QTU

  • PubMed Abstract: 

    Scribble is a highly conserved regulator of cell polarity, a process that enables the generation of asymmetry at the cellular and tissue level in higher organisms. Scribble acts in concert with Disc-large (Dlg) and Lethal-2-giant larvae (Lgl) to form the Scribble polarity complex, and its functional dysregulation is associated with poor prognosis during viral infections. Viruses have been shown to interfere with Scribble by targeting Scribble PDZ domains to subvert the network of interactions that enable normal control of cell polarity via Scribble, as well as the localisation of the Scribble module within the cell. The influenza A virus NS1 protein was shown to bind to human Scribble (SCRIB) via its C-terminal PDZ binding motif (PBM). It was reported that the PBM sequence ESEV is a virulence determinant for influenza A virus H5N1 whilst other sequences, such as ESKV, KSEV and RSKV, demonstrated no affinity towards Scribble. We now show, using isothermal titration calorimetry (ITC), that ESKV and KSEV bind to SCRIB PDZ domains and that ESEV unexpectedly displayed an affinity towards all four PDZs and not just a selected few. We then define the structural basis for the interactions of SCRIB PDZ1 domain with ESEV and ESKV PBM motifs, as well as SCRIB PDZ3 with the ESKV PBM motif. These findings will serve as a platform for understanding the role of Scribble PDZ domains and their interactions with different NS1 PBMs and the mechanisms that mediate cell polarity within the context of the pathogenesis of influenza A virus.


  • Organizational Affiliation

    Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein scribble homologA [auth B],
C [auth A],
E,
G
94Homo sapiensMutation(s): 0 
Gene Names: SCRIBCRIB1KIAA0147LAP4SCRB1VARTUL
UniProt & NIH Common Fund Data Resources
Find proteins for Q14160 (Homo sapiens)
Explore Q14160 
Go to UniProtKB:  Q14160
PHAROS:  Q14160
GTEx:  ENSG00000180900 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14160
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 1B [auth D],
D [auth C],
F,
H
10H5N1 subtypeMutation(s): 0 
UniProt
Find proteins for Q6B3P2 (Influenza A virus)
Explore Q6B3P2 
Go to UniProtKB:  Q6B3P2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6B3P2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.84 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.252 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.836α = 90
b = 77.716β = 94.161
c = 64.752γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DIALSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-06
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Data collection, Refinement description