6FCO

Structural and functional characterisation of Frataxin (FXN) like protein from Chaetomium thermophilum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural and functional characterization of a frataxin from a thermophilic organism.

Rasheed, M.Jamshidiha, M.Puglisi, R.Yan, R.Cota, E.Pastore, A.

(2019) FEBS J 286: 495-506

  • DOI: 10.1111/febs.14750
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Frataxins form an interesting family of iron-binding proteins with an almost unique fold and are highly conserved from bacteria to primates. They have a pivotal role in iron-sulfur cluster biogenesis as regulators of the rates of cluster formation, a ...

    Frataxins form an interesting family of iron-binding proteins with an almost unique fold and are highly conserved from bacteria to primates. They have a pivotal role in iron-sulfur cluster biogenesis as regulators of the rates of cluster formation, as it is testified by the fact that frataxin absence is incompatible with life and reduced levels of the protein lead to the recessive neurodegenerative disease Friedreich's ataxia. Despite its importance, the structure of frataxin has been solved only from relatively few species. Here, we discuss the X-ray structure of frataxin from the thermophilic fungus Chaetomium thermophilum, and the characterization of its interactions and dynamics in solution. We show that this eukaryotic frataxin has an unusual variation in the classical frataxin fold: the last helix is shorter than in other frataxins which results in a less symmetrical and compact structure. The stability of this protein is comparable to that of human frataxin, currently the most stable among the frataxin orthologues. We also characterized the iron-binding mode of Ct frataxin and demonstrated that it binds it through a semiconserved negatively charged ridge on the first helix and beta-strand. Moreover, this frataxin is also able to bind the bacterial ortholog of the desulfurase, which is central in iron-sulfur cluster synthesis, and act as its inhibitor.


    Organizational Affiliation

    University of Pavia, Italy.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitochondrial frataxin-like protein
A, B, C, D, E, F
126Chaetomium thermophilum var. thermophilum DSM 1495Mutation(s): 0 
Gene Names: CTHT_0015430
Find proteins for G0S1Z8 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0S1Z8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MLA
Query on MLA

Download CCD File 
A, C
MALONIC ACID
C3 H4 O4
OFOBLEOULBTSOW-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.058α = 90
b = 89.058β = 90
c = 185.62γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-01-23
    Type: Initial release
  • Version 1.1: 2019-02-13
    Changes: Data collection, Database references