Serveur d'exploration sur le phanerochaete

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Degradation of chemicals by reactive radicals produced by cellobiose dehydrogenase from Phanerochaete chrysosporium.

Identifieur interne : 000B39 ( Main/Exploration ); précédent : 000B38; suivant : 000B40

Degradation of chemicals by reactive radicals produced by cellobiose dehydrogenase from Phanerochaete chrysosporium.

Auteurs : M D Cameron [États-Unis] ; S D Aust

Source :

RBID : pubmed:10375406

Descripteurs français

English descriptors

Abstract

Phanerochaete chrysosporium, grown on cellulose, produced a cellobiose-dependent dehydrogenase which reduced both ferric iron and molecular oxygen, resulting in the generation of the hydroxyl radical. The hydroxyl radical was detected in reaction mixtures with and without the addition of exogenous H2O2. The purified reductase and the fungus grown under nonligninolytic conditions that promote the production of the reductase were able to depolymerize an insoluble polyacrylate polymer. When oxalate, a secondary metabolite of P. chrysosporium, was used as the iron chelator, it was oxidized by the hydroxyl radical to form the carboxylate anion radical, a strong reductant. Under these reductive conditions, the enzyme was shown to catalyze the reduction of bromotrichloromethane to the trichloromethyl radical. We propose that these oxidative and reductive mechanisms may contribute to the degradation of a wide range of environmental pollutants by fungi which produce this enzyme.

DOI: 10.1006/abbi.1999.1257
PubMed: 10375406


Affiliations:


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Le document en format XML

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<title xml:lang="en">Degradation of chemicals by reactive radicals produced by cellobiose dehydrogenase from Phanerochaete chrysosporium.</title>
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<name sortKey="Cameron, M D" sort="Cameron, M D" uniqKey="Cameron M" first="M D" last="Cameron">M D Cameron</name>
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<nlm:affiliation>Biotechnology Center, Utah State University, Logan, Utah, 84322-4705, USA.</nlm:affiliation>
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<term>Acrylic Resins (metabolism)</term>
<term>Anions (metabolism)</term>
<term>Biodegradation, Environmental (MeSH)</term>
<term>Bromotrichloromethane (metabolism)</term>
<term>Carbohydrate Dehydrogenases (metabolism)</term>
<term>Carbon Tetrachloride (analogs & derivatives)</term>
<term>Carbon Tetrachloride (metabolism)</term>
<term>Carboxylic Acids (metabolism)</term>
<term>Cellobiose (metabolism)</term>
<term>Cellulose (metabolism)</term>
<term>Free Radicals (metabolism)</term>
<term>Hydrogen Peroxide (metabolism)</term>
<term>Hydroxyl Radical (metabolism)</term>
<term>Iron (metabolism)</term>
<term>Iron Chelating Agents (metabolism)</term>
<term>Oxalic Acid (metabolism)</term>
<term>Oxygen (metabolism)</term>
<term>Phanerochaete (enzymology)</term>
<term>Phanerochaete (growth & development)</term>
<term>Reducing Agents (metabolism)</term>
<term>Solubility (MeSH)</term>
<term>Spin Trapping (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Acide oxalique (métabolisme)</term>
<term>Acides carboxyliques (métabolisme)</term>
<term>Agents chélateurs du fer (métabolisme)</term>
<term>Anions (métabolisme)</term>
<term>Bromo-trichloro-méthane (métabolisme)</term>
<term>Carbohydrate dehydrogenases (métabolisme)</term>
<term>Cellobiose (métabolisme)</term>
<term>Cellulose (métabolisme)</term>
<term>Dépollution biologique de l'environnement (MeSH)</term>
<term>Fer (métabolisme)</term>
<term>Oxygène (métabolisme)</term>
<term>Peroxyde d'hydrogène (métabolisme)</term>
<term>Phanerochaete (croissance et développement)</term>
<term>Phanerochaete (enzymologie)</term>
<term>Piégeage de spin (MeSH)</term>
<term>Radical hydroxyle (métabolisme)</term>
<term>Radicaux libres (métabolisme)</term>
<term>Réducteurs (métabolisme)</term>
<term>Résines acryliques (métabolisme)</term>
<term>Solubilité (MeSH)</term>
<term>Tétrachloro-méthane (analogues et dérivés)</term>
<term>Tétrachloro-méthane (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="analogs & derivatives" xml:lang="en">
<term>Carbon Tetrachloride</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Acrylic Resins</term>
<term>Anions</term>
<term>Bromotrichloromethane</term>
<term>Carbohydrate Dehydrogenases</term>
<term>Carbon Tetrachloride</term>
<term>Carboxylic Acids</term>
<term>Cellobiose</term>
<term>Cellulose</term>
<term>Free Radicals</term>
<term>Hydrogen Peroxide</term>
<term>Hydroxyl Radical</term>
<term>Iron</term>
<term>Iron Chelating Agents</term>
<term>Oxalic Acid</term>
<term>Oxygen</term>
<term>Reducing Agents</term>
</keywords>
<keywords scheme="MESH" qualifier="analogues et dérivés" xml:lang="fr">
<term>Tétrachloro-méthane</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymologie" xml:lang="fr">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymology" xml:lang="en">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Acide oxalique</term>
<term>Acides carboxyliques</term>
<term>Agents chélateurs du fer</term>
<term>Anions</term>
<term>Bromo-trichloro-méthane</term>
<term>Carbohydrate dehydrogenases</term>
<term>Cellobiose</term>
<term>Cellulose</term>
<term>Fer</term>
<term>Oxygène</term>
<term>Peroxyde d'hydrogène</term>
<term>Radical hydroxyle</term>
<term>Radicaux libres</term>
<term>Réducteurs</term>
<term>Résines acryliques</term>
<term>Tétrachloro-méthane</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Biodegradation, Environmental</term>
<term>Solubility</term>
<term>Spin Trapping</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Dépollution biologique de l'environnement</term>
<term>Piégeage de spin</term>
<term>Solubilité</term>
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<front>
<div type="abstract" xml:lang="en">Phanerochaete chrysosporium, grown on cellulose, produced a cellobiose-dependent dehydrogenase which reduced both ferric iron and molecular oxygen, resulting in the generation of the hydroxyl radical. The hydroxyl radical was detected in reaction mixtures with and without the addition of exogenous H2O2. The purified reductase and the fungus grown under nonligninolytic conditions that promote the production of the reductase were able to depolymerize an insoluble polyacrylate polymer. When oxalate, a secondary metabolite of P. chrysosporium, was used as the iron chelator, it was oxidized by the hydroxyl radical to form the carboxylate anion radical, a strong reductant. Under these reductive conditions, the enzyme was shown to catalyze the reduction of bromotrichloromethane to the trichloromethyl radical. We propose that these oxidative and reductive mechanisms may contribute to the degradation of a wide range of environmental pollutants by fungi which produce this enzyme.</div>
</front>
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<DateCompleted>
<Year>1999</Year>
<Month>07</Month>
<Day>15</Day>
</DateCompleted>
<DateRevised>
<Year>2016</Year>
<Month>11</Month>
<Day>24</Day>
</DateRevised>
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<ISSN IssnType="Print">0003-9861</ISSN>
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<Issue>1</Issue>
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<Title>Archives of biochemistry and biophysics</Title>
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<ArticleTitle>Degradation of chemicals by reactive radicals produced by cellobiose dehydrogenase from Phanerochaete chrysosporium.</ArticleTitle>
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<Abstract>
<AbstractText>Phanerochaete chrysosporium, grown on cellulose, produced a cellobiose-dependent dehydrogenase which reduced both ferric iron and molecular oxygen, resulting in the generation of the hydroxyl radical. The hydroxyl radical was detected in reaction mixtures with and without the addition of exogenous H2O2. The purified reductase and the fungus grown under nonligninolytic conditions that promote the production of the reductase were able to depolymerize an insoluble polyacrylate polymer. When oxalate, a secondary metabolite of P. chrysosporium, was used as the iron chelator, it was oxidized by the hydroxyl radical to form the carboxylate anion radical, a strong reductant. Under these reductive conditions, the enzyme was shown to catalyze the reduction of bromotrichloromethane to the trichloromethyl radical. We propose that these oxidative and reductive mechanisms may contribute to the degradation of a wide range of environmental pollutants by fungi which produce this enzyme.</AbstractText>
<CopyrightInformation>Copyright 1999 Academic Press.</CopyrightInformation>
</Abstract>
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<ForeName>M D</ForeName>
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<NameOfSubstance UI="D000838">Anions</NameOfSubstance>
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<NameOfSubstance UI="D002264">Carboxylic Acids</NameOfSubstance>
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<RegistryNumber>0</RegistryNumber>
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<Chemical>
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<NameOfSubstance UI="D002475">Cellobiose</NameOfSubstance>
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<Chemical>
<RegistryNumber>3170-80-7</RegistryNumber>
<NameOfSubstance UI="C025280">trichloromethyl free radical</NameOfSubstance>
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<Chemical>
<RegistryNumber>3352-57-6</RegistryNumber>
<NameOfSubstance UI="D017665">Hydroxyl Radical</NameOfSubstance>
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<Chemical>
<RegistryNumber>4Q93RCW27E</RegistryNumber>
<NameOfSubstance UI="C006903">carbopol 940</NameOfSubstance>
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<Chemical>
<RegistryNumber>9E7R5L6H31</RegistryNumber>
<NameOfSubstance UI="D019815">Oxalic Acid</NameOfSubstance>
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<Chemical>
<RegistryNumber>BBX060AN9V</RegistryNumber>
<NameOfSubstance UI="D006861">Hydrogen Peroxide</NameOfSubstance>
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<Chemical>
<RegistryNumber>CL2T97X0V0</RegistryNumber>
<NameOfSubstance UI="D002251">Carbon Tetrachloride</NameOfSubstance>
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<Chemical>
<RegistryNumber>E1UOL152H7</RegistryNumber>
<NameOfSubstance UI="D007501">Iron</NameOfSubstance>
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<Chemical>
<RegistryNumber>EC 1.1.-</RegistryNumber>
<NameOfSubstance UI="D002237">Carbohydrate Dehydrogenases</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 1.1.99.18</RegistryNumber>
<NameOfSubstance UI="C019859">cellobiose-quinone oxidoreductase</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>IKJ30QXM63</RegistryNumber>
<NameOfSubstance UI="D001975">Bromotrichloromethane</NameOfSubstance>
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<Chemical>
<RegistryNumber>S88TT14065</RegistryNumber>
<NameOfSubstance UI="D010100">Oxygen</NameOfSubstance>
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<CitationSubset>IM</CitationSubset>
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