1KMH

Crystal Structure of spinach chloroplast F1-ATPase complexed with tentoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.297 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of spinach chloroplast F1-ATPase complexed with the phytopathogenic inhibitor tentoxin.

Groth, G.

(2002) Proc.Natl.Acad.Sci.USA 99: 3464-3468

  • DOI: 10.1073/pnas.052546099

  • PubMed Abstract: 
  • Tentoxin, a natural cyclic tetrapeptide produced by phytopathogenic fungi from the Alternaria species affects the catalytic function of the chloroplast F(1)-ATPase in certain sensitive species of plants. In this study, we show that the uncompetitive ...

    Tentoxin, a natural cyclic tetrapeptide produced by phytopathogenic fungi from the Alternaria species affects the catalytic function of the chloroplast F(1)-ATPase in certain sensitive species of plants. In this study, we show that the uncompetitive inhibitor tentoxin binds to the alphabeta-interface of the chloroplast F(1)-ATPase in a cleft localized at betaAsp-83. Most of the binding site is located on the noncatalytic alpha-subunit. The crystal structure of the tentoxin-inhibited CF(1)-complex suggests that the inhibitor is hydrogen bonded to Asp-83 in the catalytic beta-subunit but forms hydrophobic contacts with residues Ile-63, Leu-65, Val-75, Tyr-237, Leu-238, and Met-274 in the adjacent alpha-subunit. Except for minor changes around the tentoxin-binding site, the structure of the chloroplast alpha(3)beta(3)-core complex is the same as that determined with the native chloroplast ATPase. Tentoxin seems to act by inhibiting inter-subunit contacts at the alphabeta-interface and by blocking the interconversion of binding sites in the catalytic mechanism.


    Related Citations: 
    • The Structure of the Chloroplast F1-ATPase at 3.2 A Resolution
      Groth, G.,Pohl, E.
      (2001) J.Biol.Chem. 276: 1345


    Organizational Affiliation

    Heinrich-Heine-Universität, Biochemie der Pflanzen, Universitätsstrasse 1, D-40225 Duesseldorf, Germany. georg.groth@uni-duesseldorf.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATPase alpha subunit
A
507Spinacia oleraceaMutation(s): 0 
Gene Names: atpA
EC: 7.1.2.2
Find proteins for P06450 (Spinacia oleracea)
Go to UniProtKB:  P06450
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ATPase beta subunit
B
498Spinacia oleraceaMutation(s): 0 
Gene Names: atpB
EC: 7.1.2.2
Find proteins for P00825 (Spinacia oleracea)
Go to UniProtKB:  P00825
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TTX
Query on TTX

Download SDF File 
Download CCD File 
B
TENTOXIN
0
C22 H30 N4 O4
SIIRBDOFKDACOK-LFXZBHHUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.297 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 146.887α = 90.00
b = 146.887β = 90.00
c = 381.679γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
CCP4data scaling
CNSrefinement
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-12-16 
  • Released Date: 2002-03-13 
  • Deposition Author(s): Groth, G.

Revision History 

  • Version 1.0: 2002-03-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance