Structure of the mitochondrial ABC transporter, Atm1

Experimental Data Snapshot

  • Resolution: 3.06 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.253 

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Crystal structures of nucleotide-free and glutathione-bound mitochondrial ABC transporter Atm1.

Srinivasan, V.Pierik, A.J.Lill, R.

(2014) Science 343: 1137-1140

  • DOI: https://doi.org/10.1126/science.1246729
  • Primary Citation of Related Structures:  
    4MYC, 4MYH

  • PubMed Abstract: 

    The yeast mitochondrial ABC transporter Atm1, in concert with glutathione, functions in the export of a substrate required for cytosolic-nuclear iron-sulfur protein biogenesis and cellular iron regulation. Defects in the human ortholog ABCB7 cause the sideroblastic anemia XLSA/A. Here, we report the crystal structures of free and glutathione-bound Atm1 in inward-facing, open conformations at 3.06- and 3.38-angstrom resolution, respectively. The glutathione binding site includes a residue mutated in XLSA/A and is located close to the inner membrane surface in a large cavity. The two nucleotide-free adenosine 5'-triphosphate binding domains do not interact yet are kept in close vicinity through tight interaction of the two C-terminal α-helices of the Atm1 dimer. The resulting protein stabilization may be a common structural feature of all ABC exporters.

  • Organizational Affiliation

    Institut für Zytobiologie, Philipps-Universität Marburg, Robert-Koch-Strasse 6, 35032 Marburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Iron-sulfur clusters transporter ATM1, mitochondrialA,
B [auth C],
C [auth B]
598Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: ATM1MDYYMR301CYM9952.03C
Membrane Entity: Yes 
Find proteins for P40416 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40416 
Go to UniProtKB:  P40416
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40416
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.06 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.253 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 156.618α = 90
b = 156.618β = 90
c = 520.562γ = 120
Software Package:
Software NamePurpose
PHENIXmodel building
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-26
    Type: Initial release
  • Version 1.1: 2017-11-15
    Changes: Refinement description
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references