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Intermediate and mechanism of hydroxylation of o-iodophenol by salicylate hydroxylase
http://hdl.handle.net/2297/14573
http://hdl.handle.net/2297/145736f69e03f-2994-4340-a689-1534bb3fc057
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SC-PR-ITAGAKI-E-791.pdf (1.1 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | Intermediate and mechanism of hydroxylation of o-iodophenol by salicylate hydroxylase | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Suzuki, Kenzi
× Suzuki, Kenzi× Gomi, Tomoharu× Itagaki, Eiji |
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| 著者別名 |
板垣, 英治
× 板垣, 英治 |
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| 提供者所属 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 金沢大学自然科学研究科 | |||||
| 提供者所属 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 金沢大学理工研究域自然システム学系 | |||||
| 書誌情報 |
Journal of Biochemistry 巻 109, 号 5, p. 791-797, 発行日 1991-01-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0021-924X | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00694073 | |||||
| 出版者 | ||||||
| 出版者 | 日本生化学会 = Japanese Biochemical Society | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Salicylate hydroxylase [EC 1.14.13.1] from Pseudomonas putida catalyzes the hydroxylation of salicylate, and also o-aminophenol, o-nitrophenol, and o-halogenophenols, to catechol. The reactions with these o-substituted phenols comprise oxygenative deamination, denitration, and dehalogenation, respectively. The reaction try, as to NADH oxidized, oxygen consumed, and catechol formed, is 2 : 1 : 1, respectively. The mechanisms for the deiodination and oxygenation of o-iodophenol were investigated in detail by the use of I+-trapping reagents such as DL-methionine, 2-chlorodimedone, and L-tyrosine. The addition of the traps did not change the molar ratio of catechol formed to NADH oxidized, nor iodinated traps produced were in the incubation mixture. The results suggest that I+ was not produced on the deiodination in the hydroxylation of o-iodophenol. On the other hand, L-ascorbate, L-epinephrine, and phenylhydrazine increased the molar ratio. o-Phenylenediamine decreased it, being converted to phenazine. This suggests that o-benzoquinone is formed in the oxidation of o-iodophenol as a nascent product. The quinone was detected spectrophotometrically by means of the stopped-flow method. Kinetic analysis of the reactions revealed that o-benzoquinone is reduced nonenzymatically to catechol by a second molecule of NADH. A mechanism of elimination for the ortho-substituted groups of substrate phenols by the enzyme is proposed and discussed. | |||||
| 権利 | ||||||
| 権利情報 | Copyright © 1991 Japanese Biochemical Society | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 関連URI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://jb.oxfordjournals.org/cgi/content/abstract/109/5/791 | |||||
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| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1093/oxfordjournals.jbchem.a123458 | |||||
