Biodegradation and transformation of 4,4'- and 2,4-dihalodiphenyl ethers by Sphingomonas sp. strain SS33.
The bacterium Sphingomonas sp. strain SS33, obtained from parent diphenyl ether-mineralizing strain SS3 (S. Schmidt, R.-M. Wittich, D. Erdmann, H. Wilkes, W. Francke, and P. Fortnagel, Appl. Environ. Microbiol. 58:2744-2750, 1992) after several weeks of adaptation on 4,4'-difluorodiphenyl ether as the new target compound, also utilized 4,4'-dichlorodiphenyl ether for growth. Intermediary halocatechols were also mineralized via the ortho pathway by type I enzymes. 4,4'-Dibromodiphenyl ether was not used as a carbon source although transformation by resting cells yielded mononuclear haloaromatic compounds, such as 4-bromophenol and 4-bromocatechol. The same was true for the conversion of 2,4-dichlorodiphenyl ether, which yielded the respective (halo-) phenols and (halo-) catechols.
Schmidt
S
S
Institut für Allgemeine Botanik, Universität Hamburg, Germany.
Fortnagel
P
P
Wittich
R M
RM
D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001711:Biotransformation; D004785:Environmental Pollutants / Q000378:metabolism / Q000493:pharmacokinetics; D005411:Flame Retardants / Q000378:metabolism / Q000493:pharmacokinetics; D008903:Minerals / Q000378:metabolism; D010101:Oxygen Consumption; D010575:Pesticides / Q000378:metabolism / Q000493:pharmacokinetics; D010647:Phenyl Ethers / Q000378:metabolism* / Q000493:pharmacokinetics
D004785:Environmental Pollutants; D005411:Flame Retardants; D008903:Minerals; D010575:Pesticides; D010647:Phenyl Ethers