Nakamiya Kunichika, Hashimoto Syunji, Ito Hiroyasu, Edmonds John S, Morita Masatoshi
Endocrine Disrupters and Dioxins Research Project, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
Appl Environ Microbiol. 2005 Mar;71(3):1254-8. doi: 10.1128/AEM.71.3.1254-1258.2005.
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.
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。