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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Catechol 1,2-dioxygenase ： ウィキペディア英語版 Catechol 1,2-dioxygenase Catechol 1,2- dioxygenase (, ''1,2-CTD'', ''catechol-oxygen 1,2-oxidoreductase'', ''1,2-pyrocatechase'', ''catechase'', ''catechol 1,2-oxygenase'', ''catechol dioxygenase'', ''pyrocatechase'', ''pyrocatechol 1,2-dioxygenase'', ''CD I'', ''CD II'') is an enzyme that catalyzes the oxidative ring cleavage of catechol to form ''cis,cis''-muconic acid: More specifically, 1,2-CTD is an intradiol dioxygenase, a family of catechol dioxygenases that cleaves the bond between the phenolic hydroxyl groups of catechol using an Fe3+ cofactor. Thus far, 1,2-CTD has been observed to exist in the following species of soil bacteria: ''Pseudomonas sp.'', ''Pseudomonas fluorescens'', ''Aspergillus niger'', ''Brevibacterium fuscum'',〔Extradiol Cleavage of 3-Methylcatechol by Catechol 1,2-Dioxygenase from Various Microorganisms. C. T. Hou, R. Patel and M. O. Lillard, Appl. Environ. Microbiol., March 1977, volume 33, issue 3, pages 725-727 ((abstract ))〕 ''Acinetobacter calcoaceticus'', ''Trichosporon cutaneum'', '' Rhodococcus erythropolis'', ''Frateuria sp.'', ''Rhizobium trifolii'', ''Pseudomonas putida'', ''Candida tropicalis'', ''Candida maltose'', ''Rhizobium leguminosarum'', and ''Nocardia sp.''. These bacteria subsequently employ 1,2-CTD in the last step of the degradation of aromatic compounds to aliphatic products. ==History== Two families of dioxygenases were discovered by Osamu Hayaishi and Kizo Hashimoto in 1950: catechol 1,2-dioxygenase and catechol 2,3-dioxygenase (2,3-CTD). The two enzymes were identified to be a part of two separate catechol dioxygenase families: 1,2-CTD was classified as an intradiol dioxygenase while 2,3-CTD was classified as an extradiol dioxygenase. The two enzymes can be distinguished based on their reaction products and cofactors. 1,2-CTD uses Fe3+ as a cofactor to cleave the carbon-carbon bond between the phenolic hydroxyl groups of catechol, thus yielding muconic acid as its product. In contrast, 2,3-CTD utilizes Fe2+ as a cofactor to cleave the carbon-carbon bond adjacent to the phenolic hydroxyl groups of catechol, thus yielding 2-hydroxymuconaldehye as its product. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Catechol 1,2-dioxygenase」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.