Role of organic acid chelators in manganese regulation of lignin degradation by Phanerochaete chrysosporium.
Identifieur interne : 000D83 ( Main/Exploration ); précédent : 000D82; suivant : 000D84Role of organic acid chelators in manganese regulation of lignin degradation by Phanerochaete chrysosporium.
Auteurs : J. Perez [États-Unis] ; T W JeffriesSource :
- Applied biochemistry and biotechnology [ 0273-2289 ] ; 1993.
Descripteurs français
- KwdFr :
- Acides (métabolisme), Alcools benzyliques (métabolisme), Basidiomycota (métabolisme), Chélateurs (métabolisme), Dépollution biologique de l'environnement (MeSH), Isoenzymes (métabolisme), Lignine (métabolisme), Malonates (métabolisme), Manganèse (métabolisme), Oxydoréduction (MeSH), Peroxidases (métabolisme), Stabilité enzymatique (MeSH).
- MESH :
English descriptors
- KwdEn :
- Acids (metabolism), Basidiomycota (metabolism), Benzyl Alcohols (metabolism), Biodegradation, Environmental (MeSH), Chelating Agents (metabolism), Enzyme Stability (MeSH), Isoenzymes (metabolism), Lignin (metabolism), Malonates (metabolism), Manganese (metabolism), Oxidation-Reduction (MeSH), Peroxidases (metabolism).
- MESH :
- chemical , metabolism : Acids, Benzyl Alcohols, Chelating Agents, Isoenzymes, Lignin, Malonates, Manganese, Peroxidases.
- metabolism : Basidiomycota.
- Biodegradation, Environmental, Enzyme Stability, Oxidation-Reduction.
Abstract
Nitrogen, carbon, and manganese are potent regulators of lignin degradation, but although nitrogen and carbon elicit a generalizated response when cells are starved, manganese is a relatively specific regulator of lignin and manganese peroxidase (LiP and MnP, respectively). At high manganese levels, MnP is induced, and LiP is repressed. At low Mn levels, MnP is repressed, and LiP is induced. Organic acid chelators are very important in attaining LiP repression with high Mn. Both mineralization and lignin depolymerization are regulated by manganese in the presence of organic acid chelators. As long as the chelators keep Mn(II) and Mn(III) in solution, repression is observed, but eventually, dismutation reactions cause the formation and precipitation of Mn (IV) as MnO2. Repression is immediately relieved, and depolymerization and mineralization proceed at a high rate.
DOI: 10.1007/BF02918992
PubMed: 8323262
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Biodegradation, Environmental (MeSH)</term>
<term>Chelating Agents (metabolism)</term>
<term>Enzyme Stability (MeSH)</term>
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<term>Peroxidases (metabolism)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Acides (métabolisme)</term>
<term>Alcools benzyliques (métabolisme)</term>
<term>Basidiomycota (métabolisme)</term>
<term>Chélateurs (métabolisme)</term>
<term>Dépollution biologique de l'environnement (MeSH)</term>
<term>Isoenzymes (métabolisme)</term>
<term>Lignine (métabolisme)</term>
<term>Malonates (métabolisme)</term>
<term>Manganèse (métabolisme)</term>
<term>Oxydoréduction (MeSH)</term>
<term>Peroxidases (métabolisme)</term>
<term>Stabilité enzymatique (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Acids</term>
<term>Benzyl Alcohols</term>
<term>Chelating Agents</term>
<term>Isoenzymes</term>
<term>Lignin</term>
<term>Malonates</term>
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<term>Peroxidases</term>
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<term>Peroxidases</term>
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<term>Enzyme Stability</term>
<term>Oxidation-Reduction</term>
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<front><div type="abstract" xml:lang="en">Nitrogen, carbon, and manganese are potent regulators of lignin degradation, but although nitrogen and carbon elicit a generalizated response when cells are starved, manganese is a relatively specific regulator of lignin and manganese peroxidase (LiP and MnP, respectively). At high manganese levels, MnP is induced, and LiP is repressed. At low Mn levels, MnP is repressed, and LiP is induced. Organic acid chelators are very important in attaining LiP repression with high Mn. Both mineralization and lignin depolymerization are regulated by manganese in the presence of organic acid chelators. As long as the chelators keep Mn(II) and Mn(III) in solution, repression is observed, but eventually, dismutation reactions cause the formation and precipitation of Mn (IV) as MnO2. Repression is immediately relieved, and depolymerization and mineralization proceed at a high rate.</div>
</front>
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<Abstract><AbstractText>Nitrogen, carbon, and manganese are potent regulators of lignin degradation, but although nitrogen and carbon elicit a generalizated response when cells are starved, manganese is a relatively specific regulator of lignin and manganese peroxidase (LiP and MnP, respectively). At high manganese levels, MnP is induced, and LiP is repressed. At low Mn levels, MnP is repressed, and LiP is induced. Organic acid chelators are very important in attaining LiP repression with high Mn. Both mineralization and lignin depolymerization are regulated by manganese in the presence of organic acid chelators. As long as the chelators keep Mn(II) and Mn(III) in solution, repression is observed, but eventually, dismutation reactions cause the formation and precipitation of Mn (IV) as MnO2. Repression is immediately relieved, and depolymerization and mineralization proceed at a high rate.</AbstractText>
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