The reactivity of phenolic and non-phenolic residual kraft lignin model compounds with Mn(II)-peroxidase from Lentinula edodes. 2000

C Crestini, and A D'Annibale, and G G Sermanni, and R Saladino
Dipartimento di Scienze e Tecnologie Chimiche, Universitá di Tor Vergata, Rome, Italy. crestini@stc.uniroma2.it

Three phenolic model compounds representing bonding patterns of residual kraft lignin were incubated with manganese peroxidase from Lentinula edodes. Extensive degradation of all the phenolic models, mainly occurring via side-chain benzylic oxidation, was observed. Among the tested model compounds the diphenylmethane alpha-5 phenolic model was found to be the most reactive, yielding several products showing oxidation and fragmentation at the bridging position. The non-phenolic 5-5' biphenyl and 5-5' diphenylmethane models were found unreactive.

UI MeSH Term Description Entries
D008031 Lignin The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed) Lignins
D010544 Peroxidases Ovoperoxidase
D010636 Phenols Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.
D001673 Biodegradation, Environmental Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers. Bioremediation,Phytoremediation,Natural Attenuation, Pollution,Environmental Biodegradation,Pollution Natural Attenuation
D020074 Lentinula A genus of fungi of the family Tricholomataceae, order AGARICALES. The commonly known SHIITAKE MUSHROOMS are Lentinula edodes (also seen as Lentinus edodes). Lentinus,Lentinulas

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