1ZPU

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.227 

wwPDB Validation   3D Report Full Report


This is version 2.0 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 U S A 102: 15459-15464

  • DOI: 10.1073/pnas.0506227102
  • Primary Citation of Related Structures:  
    1ZPU

  • 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-produced Fe(III) is transferred to the permease Ftr1p for import into the cytosol ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Iron transport multicopper oxidase FET3A, B, C, D, E, F534Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: FET3
EC: 1
Find proteins for P38993 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38993 
Go to UniProtKB:  P38993
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
AA [auth a], DA [auth d], FA [auth f], G, IA [auth i], J, KA [auth k], M
AA [auth a], DA [auth d], FA [auth f], G, IA [auth i], J, KA [auth k], M, O, S, U, Y
5 N-Glycosylation Oligosaccharides Interaction
Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseH, JA [auth j], N, Z6 N-Glycosylation Oligosaccharides Interaction
Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseBA [auth b], GA [auth g], I, P, Q, V2 N-Glycosylation Oligosaccharides Interaction
Entity ID: 5
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseCA [auth c], HA [auth h], K, L, LA [auth l], W, X3 N-Glycosylation Oligosaccharides Interaction
Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseR4 N-Glycosylation Oligosaccharides Interaction
Entity ID: 7
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseEA [auth e], T7 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
AC [auth E] , EB [auth C] , FB [auth C] , FC [auth F] , GB [auth C] , GC [auth F] , HB [auth C] , HC [auth F] , 
AC [auth E],  EB [auth C],  FB [auth C],  FC [auth F],  GB [auth C],  GC [auth F],  HB [auth C],  HC [auth F],  IB [auth C],  IC [auth F],  JC [auth F],  KC [auth F],  MA [auth A],  NA [auth A],  NB [auth D],  OA [auth A],  OB [auth D],  PA [auth A],  PB [auth D],  QA [auth A],  QB [auth D],  RB [auth D],  VA [auth B],  WA [auth B],  WB [auth E],  XA [auth B],  XB [auth E],  YA [auth B],  YB [auth E],  ZA [auth B],  ZB [auth E]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
CU1
Query on CU1

Download Ideal Coordinates CCD File 
AB [auth B] , BB [auth B] , BC [auth E] , CB [auth B] , CC [auth E] , DB [auth B] , DC [auth E] , EC [auth E] , 
AB [auth B],  BB [auth B],  BC [auth E],  CB [auth B],  CC [auth E],  DB [auth B],  DC [auth E],  EC [auth E],  JB [auth C],  KB [auth C],  LB [auth C],  LC [auth F],  MB [auth C],  MC [auth F],  NC [auth F],  OC [auth F],  RA [auth A],  SA [auth A],  SB [auth D],  TA [auth A],  TB [auth D],  UA [auth A],  UB [auth D],  VB [auth D]
COPPER (I) ION
Cu
VMQMZMRVKUZKQL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.227 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.534α = 90
b = 168.534β = 90
c = 174.605γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
CCP4data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-10-04
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary