1E0Y

Structure of the D170S/T457E double mutant of vanillyl-alcohol oxidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Inversion of Stereospecificity in Vanillyl-Alcohol Oxidase

Van Der Heuvel, R.H.H.Fraaije, M.W.Espinosa, M.F.Mattevi, A.Van Berkel, W.J.H.

(2000) Proc.Natl.Acad.Sci.USA 97: 9455

  • DOI: 10.1073/pnas.160175897

  • PubMed Abstract: 
  • Vanillyl-alcohol oxidase (VAO) is the prototype of a newly recognized family of structurally related oxidoreductases sharing a conserved FAD-binding domain. The active site of VAO is formed by a cavity where the enzyme is able to catalyze many reacti ...

    Vanillyl-alcohol oxidase (VAO) is the prototype of a newly recognized family of structurally related oxidoreductases sharing a conserved FAD-binding domain. The active site of VAO is formed by a cavity where the enzyme is able to catalyze many reactions with phenolic substrates. Among these reactions is the stereospecific hydroxylation of 4-ethylphenol-forming (R)-1-(4'-hydroxyphenyl)ethanol. During this conversion, Asp-170 is probably critical for the hydration of the initially formed p-quinone methide intermediate. By site-directed mutagenesis, the putative active site base has been relocated to the opposite face of the active site cavity. In this way, a change in stereospecificity has been achieved. Like native VAO, the single mutants T457E, D170A, and D170S preferentially converted 4-ethylphenol to the (R)-enantiomer of 1-(4'-hydroxyphenyl)ethanol. The double mutants D170A/T457E and D170S/T457E exhibited an inverted stereospecificity with 4-ethylphenol. Particularly, D170S/T457E was strongly (S)-selective, with an enantiomeric excess of 80%. The crystal structure of D170S/T457E, in complex with trifluoromethylphenol, showed a highly conserved mode of ligand binding and revealed that the distinctive catalytic properties of this mutant are not caused by major structural changes.


    Organizational Affiliation

    Department of Biomolecular Sciences, Laboratory of Biochemistry, Wageningen University, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VANILLYL-ALCOHOL OXIDASE
A, B
560Penicillium simplicissimumMutation(s): 2 
Gene Names: VAOA
EC: 1.1.3.38
Find proteins for P56216 (Penicillium simplicissimum)
Go to UniProtKB:  P56216
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
FCR
Query on FCR

Download SDF File 
Download CCD File 
B
ALPHA,ALPHA,ALPHA-TRIFLUORO-P-CRESOL
C7 H5 F3 O
BAYGVMXZJBFEMB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.225 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 131.281α = 90.00
b = 131.281β = 90.00
c = 134.355γ = 90.00
Software Package:
Software NamePurpose
CCP4phasing
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance