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 
  • R-Value Observed: 0.225 

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Ligand Structure Quality Assessment 


This is version 1.3 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 U S A 97: 9455

  • DOI: 10.1073/pnas.160175897
  • Primary Citation of Related Structures:  
    1E0Y

  • 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 reactions with phenolic substrates ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VANILLYL-ALCOHOL OXIDASEA, B560Penicillium simplicissimumMutation(s): 2 
Gene Names: VAOA
EC: 1.1.3.38
UniProt
Find proteins for P56216 (Penicillium simplicissimum)
Explore P56216 
Go to UniProtKB:  P56216
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD (Subject of Investigation/LOI)
Query on FAD

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
FCR (Subject of Investigation/LOI)
Query on FCR

Download Ideal Coordinates CCD File 
E [auth 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 
  • R-Value Observed: 0.225 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 131.281α = 90
b = 131.281β = 90
c = 134.355γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling
CCP4phasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-04-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Advisory, Data collection, Derived calculations