1KYA

ACTIVE LACCASE FROM TRAMETES VERSICOLOR COMPLEXED WITH 2,5-XYLIDINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a four-copper laccase complexed with an arylamine: insights into substrate recognition and correlation with kinetics.

Bertrand, T.Jolivalt, C.Briozzo, P.Caminade, E.Joly, N.Madzak, C.Mougin, C.

(2002) Biochemistry 41: 7325-7333


  • PubMed Abstract: 
  • Laccases are multicopper oxidases that catalyze the oxidation of a wide range of phenols or arylamines, and their use in industrial oxidative processes is increasing. We purified from the white rot fungus Trametes versicolor a laccase that exists as ...

    Laccases are multicopper oxidases that catalyze the oxidation of a wide range of phenols or arylamines, and their use in industrial oxidative processes is increasing. We purified from the white rot fungus Trametes versicolor a laccase that exists as five different isozymes, depending on glycosylation. The 2.4 A resolution structure of the most abundant isozyme of the glycosylated enzyme was solved. The four copper atoms are present, and it is the first crystal structure of a laccase in its active form. The crystallized enzyme binds 2,5-xylidine, which was used as a laccase inducer in the fungus culture. This arylamine is a very weak reducing substrate of the enzyme. The cavity enclosing 2,5-xylidine is rather wide, allowing the accommodation of substrates of various sizes. Several amino acid residues make hydrophobic interactions with the aromatic ring of the ligand. In addition, two charged or polar residues interact with its amino group. The first one is an histidine that also coordinates the copper that functions as the primary electron acceptor. The second is an aspartate conserved among fungal laccases. The purified enzyme can oxidize various hydroxylated compounds of the phenylurea family of herbicides that we synthesized. These phenolic substrates have better affinities at pH 5 than at pH 3, which could be related to the 2,5-xylidine binding by the aspartate. This is the first high-resolution structure of a multicopper oxidase complexed to a reducing substrate. It provides a model for engineering laccases that are either more efficient or with a wider substrate specificity.


    Organizational Affiliation

    Laboratoire d'Enzymologie et Biochimie Structurales, UPR 9063 du CNRS, 91198 Gif-sur-Yvette Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LACCASE
A, B, C, D
499Trametes versicolorGene Names: lac1
EC: 1.10.3.2
Find proteins for Q96UT7 (Trametes versicolor)
Go to UniProtKB:  Q96UT7
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
XYD
Query on XYD

Download SDF File 
Download CCD File 
A, B, C, D
2,5-DIMETHYLANILINE
2,5-XYLIDINE
C8 H11 N
VOWZNBNDMFLQGM-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU

Download SDF File 
Download CCD File 
A, B, C, D
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
PYE
Query on PYE

Download SDF File 
Download CCD File 
A, B, D
TETRAHYDROPYRAN
C5 H10 O
DHXVGJBLRPWPCS-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.253 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 87.720α = 90.00
b = 110.520β = 103.44
c = 123.201γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-19
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance