1CJ2

MUTANT GLN34ARG OF PARA-HYDROXYBENZOATE HYDROXYLASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Work: 0.144 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Switch of coenzyme specificity of p-hydroxybenzoate hydroxylase.

Eppink, M.H.Overkamp, K.M.Schreuder, H.A.Van Berkel, W.J.

(1999) J.Mol.Biol. 292: 87-96

  • DOI: 10.1006/jmbi.1999.3015
  • Primary Citation of Related Structures:  1CJ3, 1CJ4

  • PubMed Abstract: 
  • p-Hydroxybenzoate hydroxylase (PHBH) is the archetype of the family of NAD(P)H-dependent flavoprotein aromatic hydroxylases. These enzymes share a conserved FAD-binding domain but lack a recognizable fold for binding the pyridine nucleotide. We have ...

    p-Hydroxybenzoate hydroxylase (PHBH) is the archetype of the family of NAD(P)H-dependent flavoprotein aromatic hydroxylases. These enzymes share a conserved FAD-binding domain but lack a recognizable fold for binding the pyridine nucleotide. We have switched the coenzyme specificity of strictly NADPH-dependent PHBH from Pseudomonas fluorescens by site-directed mutagenesis. To that end, we altered the solvent exposed helix H2 region (residues 33-40) of the FAD-binding domain. Non-conservative selective replacements of Arg33 and Tyr38 weakened the binding of NADPH without disturbing the protein architecture. Introduction of a basic residue at position 34 increased the NADPH binding strength. Double (M2) and quadruple (M4) substitutions in the N-terminal part of helix H2 did not change the coenzyme specificity. By extending the replacements towards residues 38 and 40, M5 and M6 mutants were generated which were catalytically more efficient with NADH than with NADPH. It is concluded that specificity in P. fluorescens PHBH is conferred by interactions of Arg33, Tyr38 and Arg42 with the 2'-phosphate moiety of bound NADPH, and that introduction of an acidic group at position 38 potentially enables the recognition of the 2'-hydroxy group of NADH. This is the first report on the coenzyme reversion of a flavoprotein aromatic hydroxylase.


    Related Citations: 
    • Crystal Structure of P-Hydroxybenzoate Hydroxylase
      Wierenga, R.K.,De Jong, R.J.,Kalk, K.H.,Hol, W.G.J.,Drenth, J.
      (1979) J.Mol.Biol. 131: 55
    • The Coenzyme Analogue Adenosine 5-Diphosphoribose Displaces Fad in the Active Site of P-Hydroxybenzoate Hydroxylase. An X-Ray Crystallographic Investigation
      Van Der Laan, J.M.,Schreuder, H.A.,Swarte, M.B.A.,Wierenga, R.K.,Kalk, K.H.,Hol, W.G.J.,Drenth, J.
      (1989) Biochemistry 28: 7199
    • Crystallization and Preliminary X-Ray Investigation of P-Hydroxybenzoate Hydroxylase from Pseudomonas Fluorescens
      Drenth, J.,Hol, W.G.J.,Wierenga, R.K.
      (1975) J.Biol.Chem. 250: 5268
    • Crystal Structure of the P-Hydroxybenzoate Hydroxylase-Substrate Complex Refined at 1.9 Angstroms Resolution. Analysis of the Enzyme-Substrate and Enzyme-Product Complexes
      Schreuder, H.A.,Prick, P.A.J.,Wierenga, R.K.,Vriend, G.,Wilson, K.S.,Hol, W.G.J.,Drenth, J.
      (1989) J.Mol.Biol. 208: 679
    • Crystal Structures of Wild-Type P-Hydroxybenzoate Hydroxylase Complexed with 4- Aminobenzoate, 2,4-Dihydroxybenzoate and 3-Hydroxy-4-Aminobenzoate and the Tyr222Ala Mutant, Complexed with 2-Hydroxy-4-Aminobenzoate. Evidence for a Proton Channel and a New B
      Schreuder, H.A.,Mattevi, A.,Obmolova, G.,Kalk, K.H.,Hol, W.G.J.,Van Der Bolt, F.J.T.,Van Berkel, W.J.H.
      (1994) Biochemistry 33: 10161
    • Crystal Structure of the Reduced Form of P-Hydroxybenzoate Hydroxylase Refined at 2.3 Angstroms Resolution
      Schreuder, H.A.,Van Der Laan, J.M.,Swarte, M.B.A.,Kalk, K.H.,Hol, W.G.J.,Drenth, J.
      (1992) Proteins 14: 178
    • Engineering of the Microheterogeneity-Resistant P-Hydroxybenzoate Hydroxylase from Pseudomonas Fluorescens
      Eschrich, K.,Van Berkel, W.J.H.,Westphal, A.H.,De Kok, A.,Mattevi, A.,Obmolova, G.,Kalk, H.,Hol, W.G.J.
      (1990) FEBS Lett. 277: 197
    • Crystal Structure of P-Hydroxybenzoate Hydroxylase Complexed with its Reaction Product 3,4-Dihydroxybenzoate
      Schreuder, H.A.,Van Der Laan, J.M.,Hol, W.G.J.,Drenth, J.
      (1988) J.Mol.Biol. 199: 637
    • Crystal Structure of P-Hydroxybenzoate Hydroxylase Reconstituted with the Modified Fad Present in Alcohol Oxidase from Methyloprophic Yeasts: Evidence for an Arabinoflavin
      Van Berkel, W.J.H.,Eppink, M.H.M.,Schreuder, H.A.
      (1994) Protein Sci. 3: 2245


    Organizational Affiliation

    Department of Biomolecular Sciences, Laboratory of Biochemistry, Wageningen University, Wageningen, 6703 HA, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (P-HYDROXYBENZOATE HYDROXYLASE)
A
391Pseudomonas fluorescensGene Names: pobA
EC: 1.14.13.2
Find proteins for P00438 (Pseudomonas fluorescens)
Go to UniProtKB:  P00438
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

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

Download SDF File 
Download CCD File 
A
P-HYDROXYBENZOIC ACID
C7 H6 O3
FJKROLUGYXJWQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Work: 0.144 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 71.800α = 90.00
b = 146.500β = 90.00
c = 88.600γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
XSCALEdata scaling
X-PLORrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-04-30
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations