3E2J

Crystal structure of bovine coupling factor B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.241 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of bovine mitochondrial factor B at 0.96-A resolution.

Lee, J.K.Belogrudov, G.I.Stroud, R.M.

(2008) Proc Natl Acad Sci U S A 105: 13379-13384

  • DOI: https://doi.org/10.1073/pnas.0805689105
  • Primary Citation of Related Structures:  
    3DZE, 3E2J, 3E3Z, 3E4G

  • PubMed Abstract: 

    Coupling factor B (FB) is a mitochondrial inner membrane polypeptide that facilitates the energy-driven catalysis of ATP synthesis in animal mitochondria by blocking a proton leak across the membrane. Here, we report the crystal structure of the bovine mitochondrial FB mutant with Gly-3-Glu substitution determined at a resolution of 0.96 A and that of the WT polypeptide at a resolution of 2.9 A. The structure reveals an oblong, oval-shaped molecule with a unique globular N-terminal domain that is proposed to be the membrane anchor domain and the capping region to the C-terminal leucine-rich repeats domain. A short N-terminal alpha-helix, which extends away from the molecule's body, is suggestive of functioning as an anchor for FB to the matrix side of the mitochondrial inner membrane. Identification of a bound Mg(2+) ion reveals that FB is a metalloprotein. We also report the cocrystal structures of FB bound with phenylarsine oxide and Cd(2+), two known inhibitors of the FB coupling activity.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158-2517, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase subunit s, mitochondrial
A, B, C, D
176Bos taurusMutation(s): 0 
Gene Names: ATP5SATPW
EC: 3.6.3.14
UniProt
Find proteins for P22027 (Bos taurus)
Explore P22027 
Go to UniProtKB:  P22027
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22027
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.241 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.556α = 90
b = 133.941β = 90
c = 115.711γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-08-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description