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一种分离真菌对1,4-二氧六环和环醚的降解作用

Degradation of 1,4-dioxane and cyclic ethers by an isolated fungus.

作者信息

Nakamiya Kunichika, Hashimoto Syunji, Ito Hiroyasu, Edmonds John S, Morita Masatoshi

机构信息

Endocrine Disrupters and Dioxins Research Project, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.

出版信息

Appl Environ Microbiol. 2005 Mar;71(3):1254-8. doi: 10.1128/AEM.71.3.1254-1258.2005.

Abstract

By using 1,4-dioxane as the sole source of carbon, a 1,4-dioxane-degrading microorganism was isolated from soil. The fungus, termed strain A, was able to utilize 1,4-dioxane and many kinds of cyclic ethers as the sole source of carbon and was identified as Cordyceps sinensis from its 18S rRNA gene sequence. Ethylene glycol was identified as a degradation product of 1,4-dioxane by the use of deuterated 1,4-dioxane-d8 and gas chromatography-mass spectrometry analysis. A degradation pathway involving ethylene glycol, glycolic acid, and oxalic acid was proposed, followed by incorporation of the glycolic acid and/or oxalic acid via glyoxylic acid into the tricarboxylic acid cycle.

摘要

以1,4 - 二氧六环作为唯一碳源,从土壤中分离出一种能降解1,4 - 二氧六环的微生物。该真菌被命名为菌株A,它能够利用1,4 - 二氧六环和多种环醚作为唯一碳源,通过其18S rRNA基因序列鉴定为中华虫草。利用氘代1,4 - 二氧六环 - d8和气相色谱 - 质谱分析,确定乙二醇是1,4 - 二氧六环的降解产物。提出了一条涉及乙二醇、乙醇酸和草酸的降解途径,随后乙醇酸和/或草酸通过乙醛酸进入三羧酸循环。

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