2FQL

Crystal structure of trimeric frataxin from the yeast Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.286 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The structures of frataxin oligomers reveal the mechanism for the delivery and detoxification of iron.

Karlberg, T.Schagerlof, U.Gakh, O.Park, S.Ryde, U.Lindahl, M.Leath, K.Garman, E.Isaya, G.Al-Karadaghi, S.

(2006) Structure 14: 1535-1546

  • DOI: 10.1016/j.str.2006.08.010
  • Also Cited By: 4EC2

  • PubMed Abstract: 
  • Defects in the mitochondrial protein frataxin are responsible for Friedreich ataxia, a neurodegenerative and cardiac disease that affects 1:40,000 children. Here, we present the crystal structures of the iron-free and iron-loaded frataxin trimers, an ...

    Defects in the mitochondrial protein frataxin are responsible for Friedreich ataxia, a neurodegenerative and cardiac disease that affects 1:40,000 children. Here, we present the crystal structures of the iron-free and iron-loaded frataxin trimers, and a single-particle electron microscopy reconstruction of a 24 subunit oligomer. The structures reveal fundamental aspects of the frataxin mechanism. The trimer has a central channel in which one atom of iron binds. Two conformations of the channel with different metal-binding affinities suggest that a gating mechanism controls whether the bound iron is delivered to other proteins or transferred to detoxification sites. The trimer constitutes the basic structural unit of the 24 subunit oligomer. The architecture of this oligomer and several features of the trimer structure demonstrate striking similarities to the iron-storage protein ferritin. The data reveal how stepwise assembly provides frataxin with the structural flexibility to perform two functions: metal delivery and detoxification.


    Organizational Affiliation

    Department of Molecular Biophysics, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Frataxin homolog, mitochondrial
A
123Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 1 
Gene Names: YFH1
EC: 1.16.3.1
Find proteins for Q07540 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q07540
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.286 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 121.220α = 90.00
b = 121.220β = 90.00
c = 121.220γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
MAR345data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-07
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Advisory, Data collection, Refinement description