5NL1

Shigella IpaA-VBS3/TBS in complex with the Talin VBS1 domain 488-512


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Shigella IpaA Binding to Talin Stimulates Filopodial Capture and Cell Adhesion.

Valencia-Gallardo, C.Bou-Nader, C.Aguilar-Salvador, D.I.Carayol, N.Quenech'Du, N.Pecqueur, L.Park, H.Fontecave, M.Izard, T.Tran Van Nhieu, G.

(2019) Cell Rep 26: 921-932.e6

  • DOI: https://doi.org/10.1016/j.celrep.2018.12.091
  • Primary Citation of Related Structures:  
    5NL1

  • PubMed Abstract: 

    The Shigella type III effector IpaA contains three binding sites for the focal adhesion protein vinculin (VBSs), which are involved in bacterial invasion of host cells. Here, we report that IpaA VBS3 unexpectedly binds to talin. The 2.5 Å resolution crystal structure of IpaA VBS3 in complex with the talin H1-H4 helices shows a tightly folded α-helical bundle, which is in contrast to the bundle unraveling upon vinculin interaction. High-affinity binding to talin H1-H4 requires a core of hydrophobic residues and electrostatic interactions conserved in talin VBS H46. Remarkably, IpaA VBS3 localizes to filopodial distal adhesions enriched in talin, but not vinculin. In addition, IpaA VBS3 binding to talin was required for filopodial adhesions and efficient capture of Shigella. These results point to the functional diversity of VBSs and support a specific role for talin binding by a subset of VBSs in the formation of filopodial adhesions.


  • Organizational Affiliation

    Equipe Communication Intercellulaire et Infections Microbiennes, Centre de Recherche Interdisciplinaire en Biologie (CIRB), Collège de France, 75005 Paris, France; INSERM U1050, 75005 Paris, France; Centre National de la Recherche Scientifique UMR7241, 75005 Paris, France; MEMOLIFE Laboratory of Excellence and Paris Science Lettres, 75005 Paris, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Talin-1
A, B, C, D, E
A, B, C, D, E, F
156Mus musculusMutation(s): 0 
Gene Names: Tln1Tln
UniProt
Find proteins for P26039 (Mus musculus)
Explore P26039 
Go to UniProtKB:  P26039
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26039
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Invasin IpaA
G, H, I, J, K
G, H, I, J, K, L
46Shigella flexneriMutation(s): 0 
Gene Names: ipaACP0125
UniProt
Find proteins for P18010 (Shigella flexneri)
Explore P18010 
Go to UniProtKB:  P18010
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP18010
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.26α = 90
b = 96.36β = 90
c = 175.69γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2019-05-22
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description
  • Version 1.3: 2024-10-23
    Changes: Structure summary