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

Experimental Data Snapshot

  • Resolution: 1.84 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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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: https://doi.org/10.1038/nchembio.457
  • Primary Citation of Related Structures:  
    2XQS, 2XQT, 2XQU

  • 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 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
82Arthrospira platensisMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CVM

Download Ideal Coordinates CCD File 
AA [auth B]
AB [auth E]
BA [auth C]
BB [auth E]
CA [auth C]
AA [auth B],
AB [auth E],
BA [auth C],
BB [auth E],
CA [auth C],
CB [auth E],
DA [auth C],
DB [auth E],
EA [auth C],
EB [auth E],
F [auth A],
FA [auth C],
FB [auth E],
G [auth A],
GA [auth C],
GB [auth E],
H [auth A],
HA [auth C],
HB [auth E],
I [auth A],
IA [auth C],
J [auth A],
JA [auth C],
K [auth A],
KA [auth C],
L [auth A],
LA [auth C],
M [auth A],
MA [auth D],
N [auth A],
NA [auth D],
O [auth A],
OA [auth D],
P [auth A],
PA [auth D],
Q [auth B],
QA [auth D],
R [auth B],
RA [auth D],
S [auth B],
SA [auth D],
T [auth B],
TA [auth D],
U [auth B],
UA [auth D],
V [auth B],
VA [auth D],
W [auth B],
WA [auth D],
X [auth B],
XA [auth E],
Y [auth B],
YA [auth E],
Z [auth B],
ZA [auth E]
C22 H40 O11
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on FME
A, B, C, D, E
Experimental Data & Validation

Experimental Data

  • Resolution: 1.84 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 63 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.89α = 90
b = 93.89β = 90
c = 257.32γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-27
    Type: Initial release
  • Version 1.1: 2011-06-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description