1GOF

NOVEL THIOETHER BOND REVEALED BY A 1.7 ANGSTROMS CRYSTAL STRUCTURE OF GALACTOSE OXIDASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Observed: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Novel thioether bond revealed by a 1.7 A crystal structure of galactose oxidase.

Ito, N.Phillips, S.E.Stevens, C.Ogel, Z.B.McPherson, M.J.Keen, J.N.Yadav, K.D.Knowles, P.F.

(1991) Nature 350: 87-90

  • DOI: 10.1038/350087a0
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Galactose oxidase is an extracellular enzyme secreted by the fungus Dactylium dendroides. It is monomeric, with a relative molecular mass of 68,000, catalyses the stereospecific oxidation of a broad range of primary alcohol substrates and possesses a ...

    Galactose oxidase is an extracellular enzyme secreted by the fungus Dactylium dendroides. It is monomeric, with a relative molecular mass of 68,000, catalyses the stereospecific oxidation of a broad range of primary alcohol substrates and possesses a unique mononuclear copper site essential for catalysing a two-electron transfer reaction during the oxidation of primary alcohols to corresponding aldehydes. Recent evidence arguing against a Cu(III)-Cu(I) couple implies the existence of a second redox-active site proposed to involve pyrroloquinoline quinone or a tyrosine radical. We now report the crystal structure of galactose oxidase at 1.7 A resolution. This reveals a unique structural feature at the copper site with a novel thioether bond linking Cys 228 and Tyr 272 in a stacking interaction with Trp 290. We propose that these molecular components stabilize the protein free-radical species essential for catalysis and thus provide a 'built-in' secondary cofactor. This feature may represent a new mechanism for mediating electron transfer in metalloenzymes in the absence of exogenous cofactors.


    Related Citations: 
    • The Crystal Structure of a Free Radical Enzyme, Galactose Oxidase
      Ito, N., Phillips, S.E.V., Yadav, K.K.S., Knowles, P.F.
      () To be published --: --
    • Galactose Oxidase of Dactylium Dendroides: Gene Cloning and Sequence Analysis
      McPherson, M.J., Ogel, Z.B., Stevens, C., Yadav, K.D.S., Keen, J.M., Knowles, P.F.
      (1992) J Biol Chem 267: 8146

    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Leeds, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GALACTOSE OXIDASEA639Hypomyces rosellusMutation(s): 0 
EC: 1.1.3.9
Find proteins for P0CS93 (Gibberella zeae)
Explore P0CS93 
Go to UniProtKB:  P0CS93
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CU
Query on CU

Download CCD File 
A
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
ACY
Query on ACY

Download CCD File 
A
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Observed: 0.177 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98α = 90
b = 89.4β = 117.8
c = 86.7γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other