1GMJ

The structure of bovine IF1, the regulatory subunit of mitochondrial F-ATPase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.258 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

The Structure of Bovine If(1), the Regulatory Subunit of Mitochondrial F-ATPase.

Cabezon, E.Runswick, M.J.Leslie, A.G.W.Walker, J.E.

(2001) EMBO J 20: 6990

  • DOI: https://doi.org/10.1093/emboj/20.24.6990
  • Primary Citation of Related Structures:  
    1GMJ

  • PubMed Abstract: 

    In mitochondria, the hydrolytic activity of ATP synthase is regulated by an inhibitor protein, IF(1). Its binding to ATP synthase depends on pH, and below neutrality, IF(1) is dimeric and forms a stable complex with the enzyme. At higher pH values, IF(1) forms tetramers and is inactive. In the 2.2 A structure of the bovine IF(1) described here, the four monomers in the asymmetric unit are arranged as a dimer of dimers. Monomers form dimers via an antiparallel alpha-helical coiled coil in the C-terminal region. Dimers are associated into oligomers and form long fibres in the crystal lattice, via coiled-coil interactions in the N-terminal and inhibitory regions (residues 14-47). Therefore, tetramer formation masks the inhibitory region, preventing IF(1) binding to ATP synthase.


  • Organizational Affiliation

    The Medical Research Council Dunn Human Nutrition Unit, Hills Road, Cambridge CB2 2XY, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATPASE INHIBITOR
A, B, C, D
84Bos taurusMutation(s): 0 
UniProt
Find proteins for P01096 (Bos taurus)
Explore P01096 
Go to UniProtKB:  P01096
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01096
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.258 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.01α = 90
b = 53.29β = 95.89
c = 156.94γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling
MLPHAREphasing
SHARPphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-01-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy
  • Version 1.4: 2019-05-15
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2024-05-08
    Changes: Data collection, Database references, Other