Direct binding of hydroxylamine to the heme iron of Arthromyces ramosus peroxidase. Substrate analogue that inhibits compound I formation in a competetive manner.Wariishi, H., Nonaka, D., Johjima, T., Nakamura, N., Naruta, Y., Kubo, S., Fukuyama, K.
(2000) J.Biol.Chem. 275: 32919-32924
- PubMed: 10915789
- DOI: 10.1074/jbc.M004223200
- PubMed Abstract:
- Binding of Iodide to Arthromyces Ramosus Peroxidase Investigated with X-Ray Crystallographic Analysis, 1H and 127I NMR Spectroscopy, and Steady-State Kinetics
Fukuyama, K.,Sato, K.,Itakura, H.,Takahashi, S.,Hosoya, T.
(1997) J.Biol.Chem. 272: 5752
- Pentacoordination of the Heme Iron of Arthromyces Ramosus Peroxidase Shown by a 1.8 A Resolution Crystallographic Study at Ph 4.5
Kunishima, N.,Amada, F.,Fukuyama, K.,Kawamoto, M.,Matsunaga, T.,Matsubara, H.
(1996) FEBS Lett. 378: 291
- Binding Mode of Benzhydroxamic Acid to Arthromyces Ramosus Peroxidase Shown by X-Ray Crystallographic Analysis of the Complex at 1.6 A Resolution
Itakura, H.,Oda, Y.,Fukuyama, K.
(1997) FEBS Lett. 412: 107
- Crystal Structure of the Fungal Peroxidase from Arthromyces Ramosus at 1.9 A Resolution. Structural Comparisons with the Lignin and Cytochrome C Peroxidases
Kunishima, N.,Fukuyama, K.,Matsubara, H.,Hatanaka, H.,Shibano, Y.,Amachi, T.
(1994) J.Mol.Biol. 235: 331
- Crystal Structures of Cyanide-and Triiodide-Bound Forms of Arthromyces Ramosus Peroxidase at Different Ph Values. Perturbations of Active Site Residues and Their Implication in Enzyme Catalysis
Fukuyama, K.,Kunishima, N.,Amada, F.,Kubota, T.,Matsubara, H.
(1995) J.Biol.Chem. 270: 21884
- Crystallization and Preliminary X-Ray Diffraction Studies of Peroxidase from a Fungus Arthromyces Ramosus
Kunishima, N.,Fukuyama, K.,Wakabayashi, S.,Sumida, M.,Takaya, M.,Shibano, Y.,Amachi, T.,Matsubara, H.
(1993) Proteins 15: 216
The interaction of hydroxylamine (HA) with Arthromyces ramosus peroxidase (ARP) was investigated by kinetic, spectroscopic, and x-ray crystallographic techniques. HA inhibited the reaction of native ARP with H(2)O(2) in a competitive manner. Electron ...
The interaction of hydroxylamine (HA) with Arthromyces ramosus peroxidase (ARP) was investigated by kinetic, spectroscopic, and x-ray crystallographic techniques. HA inhibited the reaction of native ARP with H(2)O(2) in a competitive manner. Electron absorption and resonance Raman spectroscopic studies indicated that pentacoordinate high spin species of native ARP are converted to hexacoordinate low spin species upon the addition of HA, strongly suggesting the occurrence of a direct interaction of HA with ARP heme iron. Kinetic analysis exhibited that the apparent dissociation constant is 6.2 mm at pH 7.0 and that only one HA molecule likely binds to the vicinity of the heme. pH dependence of HA binding suggested that the nitrogen atom of HA could be involved in the interaction with the heme iron. X-ray crystallographic analysis of ARP in complex with HA at 2.0 A resolution revealed that the electron density ascribed to HA is located in the distal pocket between the heme iron and the distal His(56). HA seems to directly interact with the heme iron but is too far away to interact with Arg(52). In HA, it is likely that the nitrogen atom is coordinated to the heme iron and that hydroxyl group is hydrogen bonded to the distal His(56).
Department of Forest Products and the Institute for Fundamental Research of Organic Chemistry, Kyushu University, Fukuoka 812-8581, Japan.