1O9C

Structural view of a fungal toxin acting on a 14-3-3 regulatory complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural View of a Fungal Toxin Acting on a 14-3-3 Regulatory Complex

Wurtele, M.Jelich-Ottmann, C.Wittinghofer, A.Oecking, C.

(2003) Embo J. 22: 987

  • DOI: 10.1093/emboj/cdg104
  • Primary Citation of Related Structures:  1O9D, 1O9E, 1O9F

  • PubMed Abstract: 
  • The fungal phytotoxin fusicoccin stabilizes the interaction between the C-terminus of the plant plasma membrane H(+)-ATPase and 14-3-3 proteins, thus leading to permanent activation of the proton pump. This results in an irreversible opening of the s ...

    The fungal phytotoxin fusicoccin stabilizes the interaction between the C-terminus of the plant plasma membrane H(+)-ATPase and 14-3-3 proteins, thus leading to permanent activation of the proton pump. This results in an irreversible opening of the stomatal pore, followed by wilting of plants. Here, we report the crystal structure of the ternary complex between a plant 14-3-3 protein, fusicoccin and a phosphopeptide derived from the C-terminus of the H(+)-ATPase. Comparison with the corresponding binary 14-3-3 complexes indicates no major conformational change induced by fusicoccin. The compound rather fills a cavity in the protein-phosphopeptide interaction surface. Isothermal titration calorimetry indicates that the toxin alone binds only weakly to 14-3-3 and that peptide and toxin mutually increase each others' binding affinity approximately 90-fold. These results are important for herbicide development but might have general implications for drug development, since rather than inhibiting protein-protein interactions, which is difficult to accomplish, it might be easier to reverse the strategy and stabilize protein-protein complexes. As the fusicoccin interaction shows, only low-affinity interactions would be required for this strategy.


    Organizational Affiliation

    Max-Planck Institut für Molekulare Physiologie, Abteilung Strukturelle Biologie, Otto-Hahn-Strasse 11, D-44227 Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3-LIKE PROTEIN C
A
260Nicotiana tabacumN/A
Find proteins for P93343 (Nicotiana tabacum)
Go to UniProtKB:  P93343
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FLC
Query on FLC

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Download CCD File 
A
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.222 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 109.231α = 90.00
b = 109.231β = 90.00
c = 135.865γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
AMoREphasing
XDSdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance