Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1BC 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20.12 kDa 
• Atom Count: 1411 
• Residue Count: 179 
• Unique protein chains: 3

2LNH

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

• DOI: 10.2210/pdb2LNH/pdb
• BMRB: 18165

• Classification: Signaling Protein/Protein Binding
• Organism(s): Homo sapiens, Escherichia coli O157:H7
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-12-28 Released: 2012-08-29 
• Deposition Author(s): Aitio, O., Hellman, M., Skehan, B., Kesti, T., Leong, J.M., Saksela, K., Permi, P.

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Experimental Data Snapshot

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

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

• PubMed: 22921828 
• DOI: 10.1016/j.str.2012.07.015
• Structures With Same Primary Citation


• 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) 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Neural Wiskott-Aldrich syndrome protein	A	65	Homo sapiens	Mutation(s): 0  Gene Names: WASL
Find proteins for O00401 (Homo sapiens) Go to UniProtKB:  O00401
NIH Common Fund Data Resources
PHAROS  O00401 GTEx  ENSG00000106299

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Brain-specific angiogenesis inhibitor 1-associated protein 2-like protein 1	B	67	Homo sapiens	Mutation(s): 0  Gene Names: BAIAP2L1, IRTKS
Find proteins for Q9UHR4 (Homo sapiens) Go to UniProtKB:  Q9UHR4
NIH Common Fund Data Resources
PHAROS  Q9UHR4 GTEx  ENSG00000006453

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Secreted effector protein EspF(U)	C	48	Escherichia coli O157:H7	Mutation(s): 0  Gene 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

Entry History 

Deposition Data

• Deposited Date: 2011-12-28 
• Released Date: 2012-08-29 
Deposition Author(s): Aitio, O., Hellman, M., Skehan, B., Kesti, T., Leong, J.M., Saksela, K., Permi, P.

Revision History 

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