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KMID : 0545119970070040237
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Journal of Microbiology and Biotechnology
1997 Volume.7 No. 4 p.237 ~ p.241
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Two Different Pathways(a Chlorocatechol and a Hydroquinone Pathway) for the 4-Chlorophenol Degradation in Two Isolated Bacterial Strains
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Bae, Hee Sung
Rhee, Sung Keun/Cho, Young Gyun/Hong, Jong Ki/Lee, Sung Taik
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Abstract
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Two isolated strains, Comamonas testosteroni CPW301 and Arthrobacter ureafaciens CPR706, were able to use 4-chlorophenol (4-CP) as a sole carbon and energy source. CPW301 was found to degrade 4-CP via a meta-cleavage pathway in which the chloro-substituent was eliminated even when 4-chlorocatechol was cleaved by the catechol 2,3-dioxygenase. In contrast, CPR706 removed chloride from 4-CP prior to the ring-fission reaction, producing hydroquinone as a transient intermediate during 4-CP degradation. CPR706 exhibited much higher tolerance for 4-CP than CPW301, which was indicated by the maximum degradable concentration and degradation rate.
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KEYWORD
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