2O02

Phosphorylation independent interactions between 14-3-3 and Exoenzyme S: from structure to pathogenesis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.147 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Phosphorylation-independent interaction between 14-3-3 and exoenzyme S: from structure to pathogenesis

Ottmann, C.Yasmin, L.Weyand, M.Veesenmeyer, J.L.Diaz, M.H.Palmer, R.H.Francis, M.S.Hauser, A.R.Wittinghofer, A.Hallberg, B.

(2007) Embo J. 26: 902-913

  • DOI: 10.1038/sj.emboj.7601530

  • PubMed Abstract: 
  • 14-3-3 proteins are phosphoserine/phosphothreonine-recognizing adapter proteins that regulate the activity of a vast array of targets. There are also examples of 14-3-3 proteins binding their targets via unphosphorylated motifs. Here we present a str ...

    14-3-3 proteins are phosphoserine/phosphothreonine-recognizing adapter proteins that regulate the activity of a vast array of targets. There are also examples of 14-3-3 proteins binding their targets via unphosphorylated motifs. Here we present a structural and biological investigation of the phosphorylation-independent interaction between 14-3-3 and exoenzyme S (ExoS), an ADP-ribosyltransferase toxin of Pseudomonas aeruginosa. ExoS binds to 14-3-3 in a novel binding mode mostly relying on hydrophobic contacts. The 1.5 A crystal structure is supported by cytotoxicity analysis, which reveals that substitution of the corresponding hydrophobic residues significantly weakens the ability of ExoS to modify the endogenous targets RAS/RAP1 and to induce cell death. Furthermore, mutation of key residues within the ExoS binding site for 14-3-3 impairs virulence in a mouse pneumonia model. In conclusion, we show that ExoS binds 14-3-3 in a novel reversed orientation that is primarily dependent on hydrophobic residues. This interaction is phosphorylation independent and is required for the function of ExoS.


    Organizational Affiliation

    Department of Structural Biology, Max-Planck-Institute for Molecular Physiology, Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein zeta/delta
A, B
230Homo sapiensGene Names: YWHAZ
Find proteins for P63104 (Homo sapiens)
Go to Gene View: YWHAZ
Go to UniProtKB:  P63104
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ExoS (416-430) peptide
P, Q
14N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BEZ
Query on BEZ

Download SDF File 
Download CCD File 
A, B
BENZOIC ACID
C7 H6 O2
WPYMKLBDIGXBTP-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 71.330α = 90.00
b = 72.238β = 90.00
c = 125.664γ = 90.00
Software Package:
Software NamePurpose
MAR345data collection
PDB_EXTRACTdata extraction
XSCALEdata scaling
XDSdata reduction
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-18
    Type: Refinement description