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首页> 外文期刊>Applied and Environmental Microbiology >Degradation of Bis(4-Hydroxyphenyl)Methane (Bisphenol F) by Sphingobium yanoikuyae Strain FM-2 Isolated from River Water
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Degradation of Bis(4-Hydroxyphenyl)Methane (Bisphenol F) by Sphingobium yanoikuyae Strain FM-2 Isolated from River Water

机译：分离自河水中的矢状鞘氨醇单胞菌FM-2降解双（4-羟基苯基）甲烷（双酚F）

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摘要

Three bacteria capable of utilizing bis(4-hydroxyphenyl)methane (bisphenol F [BPF]) as the sole carbon source were isolated from river water, and they all belonged to the family Sphingomonadaceae. One of the isolates, designated Sphingobium yanoikuyae strain FM-2, at an initial cell density of 0.01 (optical density at 600 nm) completely degraded 0.5 mM BPF within 9 h without any lag period under inductive conditions. Degradation assays of various bisphenols revealed that the BPF-metabolizing system of strain FM-2 was effective only on the limited range of bisphenols consisting of two phenolic rings joined together through a bridging carbon without any methyl substitution on the rings or on the bridging structure. A BPF biodegradation pathway was proposed on the basis of metabolite production patterns and identification of the metabolites. The initial step of BPF biodegradation involves hydroxylation of the bridging carbon to form bis(4-hydroxyphenyl)methanol, followed by oxidation to 4,4′-dihydroxybenzophenone. The 4,4′-dihydroxybenzophenone appears to be further oxidized by the Baeyer-Villiger reaction to 4-hydroxyphenyl 4-hydroxybenzoate, which is then cleaved by oxidation to form 4-hydroxybenzoate and 1,4-hydroquinone. Both of the resultant simple aromatic compounds are mineralized.
机译：从河水中分离出了三种能够利用双（4-羟苯基）甲烷（双酚F [BPF]）作为唯一碳源的细菌，它们均属于Sphingomonadaceae科。在初始细胞密度为0.01（600 nm处的光学密度）下，命名为Sphingobium yanoikuyae菌株FM-2的一种分离株在9 h内完全降解了0.5 mM BPF，在诱导条件下没有任何滞后时间。各种双酚的降解分析表明，菌株FM-2的BPF代谢系统仅对有限范围的双酚有效，该双酚由通过桥连碳连接在一起的两个酚环组成，在环上或桥连结构上没有任何甲基取代。根据代谢产物的产生方式和代谢产物的鉴定，提出了BPF生物降解途径。 BPF生物降解的初始步骤包括将桥连的碳羟基化以形成双（4-羟苯基）甲醇，然后氧化为4,4'-二羟基二苯甲酮。通过Baeyer-Villiger反应，似乎将4,4'-二羟基二苯甲酮进一步氧化为4-羟基苯甲酸4-羟基苯甲酸酯，然后通过氧化裂解形成4-羟基苯甲酸酯和1,4-氢醌。所得的两种简单芳族化合物均被矿化。

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