1GOH

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å

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
  • Primary Citation of Related Structures:  1GOF, 1GOG

  • 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 OXIDASE
A
639Gibberella zeaeGene Names: GAOA
EC: 1.1.3.9
Find proteins for P0CS93 (Gibberella zeae)
Go to UniProtKB:  P0CS93
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 98.000α = 90.00
b = 89.400β = 117.80
c = 86.700γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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