2XQU

Microscopic rotary mechanism of ion translocation in the Fo complex of ATP synthases


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Microscopic Rotary Mechanism of Ion Translocation in the Fo Complex of ATP Synthases

Pogoryelov, D.Krah, A.Langer, J.Yildiz, O.Faraldo-Gomez, J.D.Meier, T.

(2010) Nat.Chem.Biol. 6: 891

  • DOI: 10.1038/nchembio.457
  • Primary Citation of Related Structures:  2XQS, 2XQT

  • PubMed Abstract: 
  • The microscopic mechanism of coupled c-ring rotation and ion translocation in F(1)F(o)-ATP synthases is unknown. Here we present conclusive evidence supporting the notion that the ability of c-rings to rotate within the F(o) complex derives from the ...

    The microscopic mechanism of coupled c-ring rotation and ion translocation in F(1)F(o)-ATP synthases is unknown. Here we present conclusive evidence supporting the notion that the ability of c-rings to rotate within the F(o) complex derives from the interplay between the ion-binding sites and their nonhomogenous microenvironment. This evidence rests on three atomic structures of the c(15) rotor from crystals grown at low pH, soaked at high pH and, after N,N'-dicyclohexylcarbodiimide (DCCD) modification, resolved at 1.8, 3.0 and 2.2 Å, respectively. Alongside a quantitative DCCD-labeling assay and free-energy molecular dynamics calculations, these data demonstrate how the thermodynamic stability of the so-called proton-locked state is maximized by the lipid membrane. By contrast, a hydrophilic environment at the a-subunit-c-ring interface appears to unlock the binding-site conformation and promotes proton exchange with the surrounding solution. Rotation thus occurs as c-subunits stochastically alternate between these environments, directionally biased by the electrochemical transmembrane gradient.


    Organizational Affiliation

    Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP SYNTHASE C CHAIN
A, B, C, D, E
82Arthrospira platensis (strain NIES-39 / IAM M-135)Gene Names: atpH
Find proteins for D5A0Q7 (Arthrospira platensis (strain NIES-39 / IAM M-135))
Go to UniProtKB:  D5A0Q7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CVM
Query on CVM

Download SDF File 
Download CCD File 
A, B, C, D, E
CYMAL-4
4-CYCLOHEXYLBUTYL 4-O-ALPHA-D-GLUCOPYRANOSYL-BETA-D-GLUCOPYRANOSIDE
C22 H40 O11
JRNQXDHDSXBSFV-WXFJLFHKSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
FME
Query on FME
A, B, C, D, E
L-PEPTIDE LINKINGC6 H11 N O3 SMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.189 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 93.890α = 90.00
b = 93.890β = 90.00
c = 257.320γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-27
    Type: Initial release
  • Version 1.1: 2011-06-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance