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: 2245-2253
- PubMed: 7756982
- DOI: 10.1002/pro.5560031210
- PubMed Abstract:
- Crystal Structure of Wild-Type P-Hydroxybenzoate Hydroxylase Complexed with 4-Aminobenzoate, 2,4-Dihydroxybenzoate and 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.J.,Van Der Bolt, F.,Van Berkel, W.J.H.
(1994) Biochemistry 33: 10161
- Analysis of the Active Site of the Flavoprotein P-Hydroxybenzoate Hydroxylase and Some Ideas with Respect to its Reaction Mechanism
Schreuder, H.A.,Hol, W.G.J.,Drenth, J.
(1989) Biochemistry 29: 3101
- 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 the Reduced Form of P-Hydroxybenzoate Hydroxylase Refine 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
- Crystal Structure of the P-Hydroxybenzoate Hydroxylase-Substrate Complex Refined at 1.9 Angstroms Resolution
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
- The Coenzyme Analogue Adenosine 5-Diphosphoribose Displaces the Fad from 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
- Molecular Modeling Reveals the Possible Importance of a Carbonyl Oxygen Binding Pocket for the Catalytic Mechanism of P-Hydroxybenzoate Hydroxylase
Schreuder, H.A.,Hol, W.G.J.,Drenth, J.
(1988) J.Biol.Chem. 263: 3131
- 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
- Comparison of the Three-Dimensional Protein and Nucleotide Structure of the Fad-Binding Domain of P-Hydroxybenzoate Hydroxylase with the Fad-as Well as Nadph-Binding Domains of Glutathione Reductase
Wierenga, R.K.,Drenth, J.,Schultz, G.E.
(1983) J.Mol.Biol. 167: 725
- The Influence of Purification and Protein Heterogeneity on the Crystallization of P-Hydroxybenzoate Hydroxylase
Van Der Laan, J.M.,Swarte, M.B.A.,Groendijk, H.,Hol, W.G.J.,Drenth, J.
(1989) Eur.J.Biochem. 179: 715
- 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
The flavin prosthetic group (FAD) of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens was replaced by a stereochemical analog, which is spontaneously formed from natural FAD in alcohol oxidases from methylotrophic yeasts. Reconstitution of ...
The flavin prosthetic group (FAD) of p-hydroxybenzoate hydroxylase from Pseudomonas fluorescens was replaced by a stereochemical analog, which is spontaneously formed from natural FAD in alcohol oxidases from methylotrophic yeasts. Reconstitution of p-hydroxybenzoate hydroxylase from apoprotein and modified FAD is a rapid process complete within seconds. Crystals of the enzyme-substrate complex of modified FAD-containing p-hydroxybenzoate hydroxylase diffract to 2.1 A resolution. The crystal structure provides direct evidence for the presence of an arabityl sugar chain in the modified form of FAD. The isoalloxazine ring of the arabinoflavin adenine dinucleotide (a-FAD) is located in a cleft outside the active site as recently observed in several other p-hydroxybenzoate hydroxylase complexes. Like the native enzyme, a-FAD-containing p-hydroxybenzoate hydroxylase preferentially binds the phenolate form of the substrate (pKo = 7.2). The substrate acts as an effector highly stimulating the rate of enzyme reduction by NADPH (kred > 500 s-1). The oxidative part of the catalytic cycle of a-FAD-containing p-hydroxybenzoate hydroxylase differs from native enzyme. Partial uncoupling of hydroxylation results in the formation of about 0.3 mol of 3,4-dihydroxybenzoate and 0.7 mol of hydrogen peroxide per mol NADPH oxidized. It is proposed that flavin motion in p-hydroxybenzoate hydroxylase is important for efficient reduction and that the flavin "out" conformation is associated with the oxidase activity.
Department of Biochemistry, Agricultural University, Wageningen, The Netherlands.