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Comparison of the characteristics of fungal and plant tyrosinases Inra
Selinheimo, E.; NiEidhin, D.; Steffensen, C.; Nielsen, J.; Lomascolo, A.; Halaouli, S.; Record, E.; O’Beirne, D.; Buchert, J.; Kruus, K..
Enzymatic crosslinking provides valuable means for modifying functionality and structural properties of different polymers. Tyrosinases catalyze the hydroxylation of various monophenols to the corresponding o-diphenols, and the subsequent oxidation of o-diphenols to the corresponding quinones, which are highly reactive and can further undergo non-enzymatic reactions to produce mixed melanins and heterogeneous polymers. Tyrosinases are also capable of oxidizing protein- and peptide-bound tyrosyl residues, resulting in the formation of inter- and intra-molecular crosslinks. Tyrosinases from apple (AT), potato (PT), the white rot fungus Pycnoporus sanguineus (PsT), the filamentous fungus Trichoderma reesei (TrT) and the edible mushroom Agaricus bisporus (AbT)...
Tipo: Journal Article Palavras-chave: ENZYME; SPECTROSCOPIE; ACTIVITE ENZYMATIQUE; INHIBITION ENZYMATIQUE PYCNOPORUS SANGUINEUS; TRICHODERMA REESI.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008c0091e56&uri=/notices/prodinra1/2008/06/
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Transgenic rice as a novel production system for Melanocarpus and Pycnoporus laccases Inra
de Wilde, C.; Uzan, E.; Zhou, Z.; Kruus, K.; Andberg, M.; Buchert, J.; Record, E.; Asther, M.; Lomascolo, A..
Laccases have numerous biotechnological applications, among them food processing. The widespread use of laccases has increased the demand for an inexpensive and safe source of recombinant enzyme. We explored the use of a rice-based system for the production of two fungal laccases derived from the ascomycete Melanocarpus albomyces and the basidiomycete Pycnoporus cinnabarinus. High-expression levels of active recombinant laccases were achieved by targeting expression to the endosperm of rice seeds. The laccase cDNAs were fused to a plant-derived signal sequence for targeting to the secretory pathway, and placed under the control of a constitutive seed-specific promoter fused to an intron for enhanced expression. This construct enabled the recovery of on...
Tipo: Journal Article Palavras-chave: PLANTE TRANSGENIQUE; BIOTECHNOLOGIE INDUSTRIELLE; PROPRIETE BIOCHIMIQUE; ASCOMYCETE; BASIDIOMYCETE LACCASE; RECOMBINANT FUNGAL ENZYME; RICE; HETEROLOGOUS PROTEIN; TRANSGENIC PLANT; BIOCHEMICAL PROPERTIES.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008c973f6c6&uri=/notices/prodinra1/2008/10/
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