Multiple roles for lignin peroxidases in the biodegradation of organic pollutants
Conference
·
OSTI ID:491059
- Univ. of Notre Dame, IN (United States)
The wood-rotting fungus Phanerochaete chrysosporium is able to degrade a wide variety of environmentally-persistent organic pollutants to carbon dioxide. The unique biodegradative abilities of this fungus are due, in part, to lignin peroxidases, oxidative enzymes that are secreted in response to nutrient deprivation. Lignin peroxidases catalyze the initial oxidation of many of the organic pollutants that are degraded by this fungus. They also mediate the initial oxidation of N,N,N{prime},N{prime},N{double_prime},N{double_prime}-hexamethylpararosaniline, several azo dyes and certain polycyclic aromatic hydrocarbons. Lignin peroxidases also mediate oxidative dechlorination. For example, lignin peroxidases oxidize pentachlorophenol to 2,3,5,6-tetrachloro-2,5-cyclohexadiene-1,4-dione. Similarly, these enzymes mediate oxidative oligomerization of 4-chloroaniline, resulting in production of several dimers, trimers and tetramers and net dechlorination of the aromatic ring. Interestingly, many, but not all, of the reactions mediated by lignin peroxidases are also mediated by other plant, fungal and oxidation of an intermediate. In the case of phenanthrene degradation, lignin peroxidases do not mediate the initial oxidation. However, these enzymes do mediate the oxidation of 9-phenanthrol, forming phenanthrene-9,10-dione. 92 refs., 3 tabs.
- OSTI ID:
- 491059
- Report Number(s):
- CONF-9406250--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Biodegradation of organopollutants by a white rot fungus in bench scale reactors. Volume 1 and Volume 2. Final report, 1 October 1989-30 September 1992
Oxidative 4-dechlorination of polychlorinated phenols is catalyzed by extracellular fungal lignin peroxidases
Oxidative degradation of phenanthrene by the ligininolytic fungus Phanerochaete chrysosporium
Technical Report
·
Tue Mar 30 23:00:00 EST 1993
·
OSTI ID:6081150
Oxidative 4-dechlorination of polychlorinated phenols is catalyzed by extracellular fungal lignin peroxidases
Journal Article
·
Tue Aug 23 00:00:00 EDT 1988
· Biochemistry; (United States)
·
OSTI ID:6326308
Oxidative degradation of phenanthrene by the ligininolytic fungus Phanerochaete chrysosporium
Journal Article
·
Mon Jun 01 00:00:00 EDT 1992
· Applied and Environmental Microbiology; (United States)
·
OSTI ID:6938126