Biodegradation of diphenyl ether and its monohalogenated derivatives by Sphingomonas sp. strain SS3.

摘要: Abstract The bacterium Sphingomonas sp. strain SS3, which utilizes diphenyl ether and its 4-fluoro, 4-chloro, (to a considerably lesser extent) 4-bromo derivatives as sole sources of carbon energy, was enriched from soil samples an industrial waste deposit. The showed cometabolic activities toward all other isomeric monohalogenated ethers. During degradation in batch culture experiments, phenol catechol were produced intermediates then channeled into the 3-oxoadipate pathway. initial step follows recently discovered mechanism 1,2-dioxygenation, yields unstable phenolic hemiacetals structures. Oxidation structure-related dibenzo-p-dioxin yielded 2-(2-hydroxyphenoxy)-muconate upon ortho cleavage intermediate 2,2',3-trihydroxydiphenyl ether. Formation phenol, catechol, halophenol, halocatechol conversion ethers gives evidence for nonspecific attack dioxygenating enzyme system.