Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 68.79 kDa 
• Atom Count: 5156 
• Modelled Residue Count: 639 
• Deposited Residue Count: 639 
• Unique protein chains: 1

1GOF

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

• DOI: 10.2210/pdb1GOF/pdb

• Classification: OXIDOREDUCTASE(OXYGEN(A))
• Organism(s): Hypomyces rosellus
• Mutation(s): No 


• Deposited: 1993-09-30 Released: 1994-01-31 
• Deposition Author(s): Ito, N., Phillips, S.E.V., Knowles, P.F.

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Experimental Data Snapshot

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

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

• PubMed: 2002850 
• DOI: 10.1038/350087a0
• Primary Citation of Related Structures:  
  1GOH, 1GOG, 1GOF


• 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 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.

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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

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GALACTOSE OXIDASE	A	639	Hypomyces rosellus	Mutation(s): 0  EC: 1.1.3.9
UniProt
Find proteins for P0CS93 (Gibberella zeae) Explore P0CS93  Go to UniProtKB:  P0CS93

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CU	B [auth A]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N
ACY	D [auth A], E [auth A]	ACETIC ACID C2 H4 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-N
NA	C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

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 = 98	α = 90
b = 89.4	β = 117.8
c = 86.7	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-09-30 
• Released Date: 1994-01-31 
Deposition Author(s): Ito, N., Phillips, S.E.V., Knowles, P.F.

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