2LNH

Enterohaemorrhagic E. coli (EHEC) exploits a tryptophan switch to hijack host F-actin assembly


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Enterohaemorrhagic Escherichia coli exploits a tryptophan switch to hijack host f-actin assembly.

Aitio, O.Hellman, M.Skehan, B.Kesti, T.Leong, J.M.Saksela, K.Permi, P.

(2012) Structure 20: 1692-1703

  • DOI: 10.1016/j.str.2012.07.015

  • PubMed Abstract: 
  • Intrinsically disordered protein (IDP)-mediated interactions are often characterized by low affinity but high specificity. These traits are essential in signaling and regulation that require reversibility. Enterohaemorrhagic Escherichia coli (EHEC) e ...

    Intrinsically disordered protein (IDP)-mediated interactions are often characterized by low affinity but high specificity. These traits are essential in signaling and regulation that require reversibility. Enterohaemorrhagic Escherichia coli (EHEC) exploit this situation by commandeering host cytoskeletal signaling to stimulate actin assembly beneath bound bacteria, generating "pedestals" that promote intestinal colonization. EHEC translocates two proteins, EspF(U) and Tir, which form a complex with the host protein IRTKS. The interaction of this complex with N-WASP triggers localized actin polymerization. We show that EspF(U) is an IDP that contains a transiently α-helical N-terminus and dynamic C-terminus. Our structure shows that single EspF(U) repeat forms a high-affinity trimolecular complex with N-WASP and IRTKS. We demonstrate that bacterial and cellular ligands interact with IRTKS SH3 in a similar fashion, but the bacterial protein has evolved to outcompete cellular targets by utilizing a tryptophan switch that offers superior binding affinity enabling EHEC-induced pedestal formation.


    Organizational Affiliation

    Program in Structural Biology and Biophysics, Institute of Biotechnology, University of Helsinki, FI-00014, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neural Wiskott-Aldrich syndrome protein
A
65Homo sapiensGene Names: WASL
Find proteins for O00401 (Homo sapiens)
Go to Gene View: WASL
Go to UniProtKB:  O00401
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Brain-specific angiogenesis inhibitor 1-associated protein 2-like protein 1
B
67Homo sapiensGene Names: BAIAP2L1 (IRTKS)
Find proteins for Q9UHR4 (Homo sapiens)
Go to Gene View: BAIAP2L1
Go to UniProtKB:  Q9UHR4
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Secreted effector protein EspF(U)
C
48Escherichia coli O157:H7Gene Names: espF(U) (tccP)
Find proteins for P0DJ89 (Escherichia coli O157:H7)
Go to UniProtKB:  P0DJ89
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • Olderado: 2LNH Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-29
    Type: Initial release
  • Version 1.1: 2012-09-12
    Type: Database references
  • Version 1.2: 2012-10-31
    Type: Database references