Novel enzymatic activity of cell free extract from thermophilic Geobacillus sp UZO 3 catalyzes reductive cleavage of diaryl ether bonds of 2,7-dichlorodibenzo-p-dioxin

作者：Suzuki Yuzoh; Nakamura Masaya^*; Otsuka Yuichiro; Suzuki Nao; Ohyama Keisuke; Kawakami Takeshi; Sato Kanna; Kajita Shinya; Hishiyama Shojiro; Fujii Takeo; Takahashi Atsushi; Katayama Yoshihiro

来源：Chemosphere, 2011, 83(6): 868-872.

DOI：10.1016/j.chemosphere.2011.02.068

• Dioxin
• Microbial degradation
• Reductive cleavage
• Diaryl ether bonds
• Thermophilic bacterium
• Geobacillus sp UZO 3

We characterized the ability of the cell free extract from polychlorinated dibenzo-p-dioxins degrading bacterium Geobacillus sp. UZO 3 to reduce even highly chlorinated dibenzo-p-dioxins such as octachlorodibenzo-p-dioxins in incineration fly ash. The degradation of 2,7-dichlorodibenzo-p-dioxin (2,7-DCDD) as a model dioxin catalyzed by the cell free extract from this strain implicates that the ether bonds of 2.7-DCDD molecule undergo reductive cleavage, since 4',5-dichloro-2-hydroxydiphenyl ether and 4-chlorophenol were detected as intermediate products of 2,7-DCDD degradation.

• 出版日期2011-4