3PMQ

Crystal structure of the outer membrane decaheme cytochrome MtrF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.305 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of a bacterial cell surface decaheme electron conduit.

Clarke, T.A.Edwards, M.J.Gates, A.J.Hall, A.White, G.F.Bradley, J.Reardon, C.L.Shi, L.Beliaev, A.S.Marshall, M.J.Wang, Z.Watmough, N.J.Fredrickson, J.K.Zachara, J.M.Butt, J.N.Richardson, D.J.

(2011) Proc.Natl.Acad.Sci.USA 108: 9384-9389

  • DOI: 10.1073/pnas.1017200108

  • PubMed Abstract: 
  • Some bacterial species are able to utilize extracellular mineral forms of iron and manganese as respiratory electron acceptors. In Shewanella oneidensis this involves decaheme cytochromes that are located on the bacterial cell surface at the termini ...

    Some bacterial species are able to utilize extracellular mineral forms of iron and manganese as respiratory electron acceptors. In Shewanella oneidensis this involves decaheme cytochromes that are located on the bacterial cell surface at the termini of trans-outer-membrane electron transfer conduits. The cell surface cytochromes can potentially play multiple roles in mediating electron transfer directly to insoluble electron sinks, catalyzing electron exchange with flavin electron shuttles or participating in extracellular intercytochrome electron exchange along "nanowire" appendages. We present a 3.2-Å crystal structure of one of these decaheme cytochromes, MtrF, that allows the spatial organization of the 10 hemes to be visualized for the first time. The hemes are organized across four domains in a unique crossed conformation, in which a staggered 65-Å octaheme chain transects the length of the protein and is bisected by a planar 45-Å tetraheme chain that connects two extended Greek key split β-barrel domains. The structure provides molecular insight into how reduction of insoluble substrate (e.g., minerals), soluble substrates (e.g., flavins), and cytochrome redox partners might be possible in tandem at different termini of a trifurcated electron transport chain on the cell surface.


    Organizational Affiliation

    Centre for Molecular and Structural Biochemistry, School of Biological Sciences and School of Chemistry, University of East Anglia, Norwich NR4 7TJ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Decaheme cytochrome c MtrF
A
669Shewanella oneidensis (strain MR-1)Gene Names: mtrF
Find proteins for Q8EG32 (Shewanella oneidensis (strain MR-1))
Go to UniProtKB:  Q8EG32
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
HEC
Query on HEC

Download SDF File 
Download CCD File 
A
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.305 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 256.640α = 90.00
b = 256.640β = 90.00
c = 256.640γ = 90.00
Software Package:
Software NamePurpose
SHELXSphasing
SCALAdata scaling
PHENIXrefinement
ADSCdata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance