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
- PubMed: 10493859
- DOI: 10.1006/jmbi.1999.3015
- Primary Citation of Related Structures:
- PubMed Abstract:
- Crystal structures of wild-type p-hydroxybenzoate hydroxylase complexed with 4-aminobenzoate,2,4-dihydroxybenzoate, and 2-hydroxy-4-aminobenzoate and of the Tyr222Ala mutant complexed with 2-hydroxy-4-aminobenzoate. Evidence for a proton channel and a new binding mode of the flavin ring.
Schreuder, H.A.,Mattevi, A.,Obmolova, G.,Kalk, K.H.,Hol, W.G.,van der Bolt, F.J.,van Berkel, W.J.
(1994) Biochemistry 33: 10161
- 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.,Drenth, J.
(1988) J.Mol.Biol. 199: 637
- Crystal structure of the reduced form of p-hydroxybenzoate hydroxylase refined at 2.3 A resolution.
Schreuder, H.A.,van der Laan, J.M.,Swarte, M.B.,Kalk, K.H.,Hol, W.G.,Drenth, J.
(1992) Proteins 14: 178
- 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
- Crystallization and preliminary x-ray investigation of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens.
Drenth, J.,Hol, W.G.,Wierenga, R.K.
(1975) J.Biol.Chem. 250: 5268
- 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.,Wierenga, R.K.,Kalk, K.H.,Hol, W.G.,Drenth, J.
(1989) Biochemistry 28: 7199
- Crystal structure of the p-hydroxybenzoate hydroxylase-substrate complex refined at 1.9 A resolution. Analysis of the enzyme-substrate and enzyme-product complexes.
Schreuder, H.A.,Prick, P.A.,Wierenga, R.K.,Vriend, G.,Wilson, K.S.,Hol, W.G.,Drenth, J.
(1989) J.Mol.Biol. 208: 679
- Crystal structure of p-hydroxybenzoate hydroxylase reconstituted with the modified FAD present in alcohol oxidase from methylotrophic yeasts: evidence for an arabinoflavin.
van Berkel, W.J.,Eppink, M.H.,Schreuder, H.A.
(1994) Protein Sci. 3: 2245
- Engineering of microheterogeneity-resistant p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens.
Eschrich, K.,van Berkel, W.J.,Westphal, A.H.,de Kok, A.,Mattevi, A.,Obmolova, G.,Kalk, K.H.,Hol, W.G.
(1990) Febs Lett. 277: 197
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.
Department of Biomolecular Sciences, Laboratory of Biochemistry, Wageningen University, Wageningen, 6703 HA, The Netherlands.