Adrenodoxin-like ferredoxin Etp1fd(516-618) of Schizosaccharomyces pombe mitochondria

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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This is version 1.6 of the entry. See complete history


Structural and Thermodynamic Characterization of the Adrenodoxin-Like Domain of the Electron-Transfer Protein Etp1 from Schizosaccharomyces Pombe.

Mueller, J.J.Hannemann, F.Schiffler, B.Ewen, K.M.Kappl, R.Heinemann, U.Bernhardt, R.

(2011) J Inorg Biochem 105: 957

  • DOI: https://doi.org/10.1016/j.jinorgbio.2011.04.001
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The protein Etp1 of Schizosaccharomyces pombe consists of an amino-terminal COX15-like domain and a carboxy-terminal ferredoxin-like domain, Etp1(fd), which is cleaved off after mitochondrial import. The physiological function of Etp1(fd) is supposed to lie in the participation in the assembly of iron-sulfur clusters and the synthesis of heme A. In addition, the protein was shown to be the first microbial ferredoxin being able to support electron transfer in mitochondrial steroid hydroxylating cytochrome P450 systems in vivo and in vitro, replacing thereby the native redox partner, adrenodoxin. Despite a sequence similarity of 39% and the fact that fission yeast is a mesophilic organism, thermodynamic studies revealed that Etp1(fd) has a melting temperature more than 20°C higher than adrenodoxin. The three-dimensional structure of Etp1(fd) has been determined by crystallography. To the best of our knowledge it represents the first three-dimensional structure of a yeast ferredoxin. The structure-based sequence alignment of Etp1(fd) with adrenodoxin yields a rational explanation for their observed mutual exchangeability in the cytochrome P450 system. Analysis of the electron exchange with the S. pombe redox partner Arh1 revealed differences between Etp1(fd) and adrenodoxin, which might be linked to their different physiological functions in the mitochondria of mammals and yeast.

  • Organizational Affiliation

    Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
103Schizosaccharomyces pombeMutation(s): 0 
Find proteins for Q10361 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore Q10361 
Go to UniProtKB:  Q10361
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ10361
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.965α = 90
b = 81.965β = 90
c = 68.289γ = 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: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-05-19
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-01-30
    Changes: Data collection, Experimental preparation
  • Version 1.4: 2019-04-03
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-10-09
    Changes: Data collection, Derived calculations, Other
  • Version 1.6: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Refinement description