1T2X

Glactose oxidase C383S mutant identified by directed evolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and kinetic studies of a series of mutants of galactose oxidase identified by directed evolution.

Wilkinson, D.Akumanyi, N.Hurtado-Guerrero, R.Dawkes, H.Knowles, P.F.Phillips, S.E.V.McPherson, M.J.

(2004) Protein Eng.Des.Sel. 17: 141-148

  • DOI: 10.1093/protein/gzh018

  • PubMed Abstract: 
  • Galactose oxidase (GO; E.C. 1.1.3.9) is a copper- containing enzyme that oxidizes a range of primary alcohols to aldehydes. This broad substrate specificity is reflected in a high K(M) for substrates. Directed evolution has previously been used to se ...

    Galactose oxidase (GO; E.C. 1.1.3.9) is a copper- containing enzyme that oxidizes a range of primary alcohols to aldehydes. This broad substrate specificity is reflected in a high K(M) for substrates. Directed evolution has previously been used to select variants of GO that exhibit enhanced expression and kinetic properties. In assays using unpurified enzyme samples, the variant C383S displayed a 5-fold lower K(M) than wild-type GO. In the present study, we have constructed, expressed, purified and characterized a number of single, double and triple mutants at residues Cys383, Tyr436 and Val494, identified in one of the directed evolution studies, to examine their relative contributions to improved catalytic activity of GO. We report kinetic studies on the various mutant enzymes. In addition, we have determined the three-dimensional structure of the C383S variant. As with many mutations identified in directed evolution experiments, the availability of structural information does not provide a definitive answer to the reason for the improved K(M) in the C383S variant protein.


    Organizational Affiliation

    Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galactose Oxidase
A
639Gibberella zeaeMutation(s): 0 
Gene Names: GAOA
EC: 1.1.3.9
Find proteins for P0CS93 (Gibberella zeae)
Go to UniProtKB:  P0CS93
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CU
Query on CU

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Download CCD File 
A
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 97.376α = 90.00
b = 88.995β = 117.49
c = 85.800γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance