1ZPU

Crystal Structure of Fet3p, a Multicopper Oxidase that Functions in Iron Import


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The copper-iron connection in biology: Structure of the metallo-oxidase Fet3p.

Taylor, A.B.Stoj, C.S.Ziegler, L.Kosman, D.J.Hart, P.J.

(2005) Proc.Natl.Acad.Sci.Usa 102: 15459-15464

  • DOI: 10.1073/pnas.0506227102

  • PubMed Abstract: 
  • Fet3p is a multicopper-containing glycoprotein localized to the yeast plasma membrane that catalyzes the oxidation of Fe(II) to Fe(III). This ferrous iron oxidation is coupled to the reduction of O(2) to H(2)O and is termed the ferroxidase reaction. ...

    Fet3p is a multicopper-containing glycoprotein localized to the yeast plasma membrane that catalyzes the oxidation of Fe(II) to Fe(III). This ferrous iron oxidation is coupled to the reduction of O(2) to H(2)O and is termed the ferroxidase reaction. Fet3p-produced Fe(III) is transferred to the permease Ftr1p for import into the cytosol. The posttranslational insertion of four copper ions into Fet3p is essential for its activity, thus linking copper and iron homeostasis. The mammalian ferroxidases ceruloplasmin and hephaestin are homologs of Fet3p. Loss of the Fe(II) oxidation catalyzed by these proteins results in a spectrum of pathological states, including death. Here, we present the structure of the Fet3p extracellular ferroxidase domain and compare it with that of human ceruloplasmin and other multicopper oxidases that are devoid of ferroxidase activity. The Fet3p structure delineates features that underlie the unique reactivity of this and homologous multicopper oxidases that support the essential trafficking of iron in diverse eukaryotic organisms. The findings are correlated with biochemical and physiological data to cross-validate the elements of Fet3p that define it as both a ferroxidase and cuprous oxidase.


    Organizational Affiliation

    Department of Biochemistry and the X-Ray Crystallography Core Laboratory, University of Texas Health Science Center, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Iron transport multicopper oxidase FET3
A, B, C, D, E, F
534Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: FET3
EC: 1.-.-.-
Find proteins for P38993 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38993
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU1
Query on CU1

Download SDF File 
Download CCD File 
A, B, C, D, E, F
COPPER (I) ION
Cu
VMQMZMRVKUZKQL-UHFFFAOYSA-N
 Ligand Interaction
MAN
Query on MAN

Download SDF File 
Download CCD File 
A, B, C, D, E, F
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

Download SDF File 
Download CCD File 
A, B, C, D, E, F
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NDG
Query on NDG

Download SDF File 
Download CCD File 
A
2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE
C8 H15 N O6
OVRNDRQMDRJTHS-PVFLNQBWSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D, E, F
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 168.534α = 90.00
b = 168.534β = 90.00
c = 174.605γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
HKL-2000data reduction
REFMACrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-10-04
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance