2KXC

1H, 13C, and 15N Chemical Shift Assignments for IRTKS-SH3 and EspFu-R47 complex


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

Recognition of tandem PxxP motifs as a unique Src homology 3-binding mode triggers pathogen-driven actin assembly

Aitio, O.Hellman, M.Kazlauskas, A.Vingadassalom, D.F.Leong, J.M.Saksela, K.Permi, P.

(2010) Proc.Natl.Acad.Sci.USA 107: 21743-21748

  • DOI: 10.1073/pnas.1010243107

  • PubMed Abstract: 
  • Src homology 3 (SH3) domains are globular protein interaction modules that regulate cell behavior. The classic SH3 ligand-binding site accommodates a hydrophobic PxxP motif and a positively charged specificity-determining residue. We have determined ...

    Src homology 3 (SH3) domains are globular protein interaction modules that regulate cell behavior. The classic SH3 ligand-binding site accommodates a hydrophobic PxxP motif and a positively charged specificity-determining residue. We have determined the NMR structure of insulin receptor tyrosine kinase substrate (IRTKS) SH3 domain in complex with a repeat from Escherichia coli-secreted protein F-like protein encoded on prophage U (EspF(U)), a translocated effector of enterohemorrhagic E. coli that commandeers the mammalian actin assembly machinery. EspF(U)-IRTKS interaction is among the highest affinity natural SH3 ligands. Our complex structure reveals a unique type of SH3 interaction based on recognition of tandem PxxP motifs in the ligand. Strikingly, the specificity pocket of IRTKS SH3 has evolved to accommodate a polyproline type II helical peptide analogously to docking of the canonical PxxP by the conserved IRTKS SH3 proline-binding pockets. This cooperative binding explains the high-affinity SH3 interaction and is required for EspF(U)-IRTKS interaction in mammalian cells as well as the formation of localized actin "pedestals" beneath bound bacteria. Importantly, tandem PxxP motifs are also found in mammalian ligands and have been shown to contribute to IRTKS SH3 recognition similarly.


    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
Brain-specific angiogenesis inhibitor 1-associated protein 2-like protein 1
A
67Homo sapiensMutation(s): 0 
Gene Names: BAIAP2L1 (IRTKS)
Find proteins for Q9UHR4 (Homo sapiens)
Go to Gene View: BAIAP2L1
Go to UniProtKB:  Q9UHR4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
EspF-like protein
B
48Escherichia coli O157:H7Mutation(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: 2KXC Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-09-21
    Type: Database references