Crystal structure of octaheme cytochrome c from Shewanella oneidensis

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.160 

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Octaheme tetrathionate reductase is a respiratory enzyme with novel heme ligation.

Mowat, C.G.Rothery, E.Miles, C.S.McIver, L.Doherty, M.K.Drewette, K.Taylor, P.Walkinshaw, M.D.Chapman, S.K.Reid, G.A.

(2004) Nat Struct Mol Biol 11: 1023-1024

  • DOI: https://doi.org/10.1038/nsmb827
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    We have isolated a soluble cytochrome from Shewanella oneidensis that contains eight covalently attached heme groups and determined its crystal structure. One of these hemes exhibits novel ligation of the iron atom by the epsilon-amino group of a lysine residue, despite its attachment via a typical CXXCH motif. This heme is most likely the active site for tetrathionate reduction, a reaction catalyzed efficiently by this enzyme.

  • Organizational Affiliation

    Institute of Cell and Molecular Biology, School of Biological Sciences, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JR, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cytochrome c, putative443Shewanella oneidensis MR-1Mutation(s): 0 
Gene Names: SO4144 (tigr locus)
Find proteins for Q8E9W8 (Shewanella oneidensis (strain ATCC 700550 / JCM 31522 / CIP 106686 / LMG 19005 / NCIMB 14063 / MR-1))
Explore Q8E9W8 
Go to UniProtKB:  Q8E9W8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8E9W8
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.160 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.59α = 90
b = 61.767β = 90
c = 185.237γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-21
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 2.0: 2021-03-03
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary