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Molecules 2009, 14(10), 4159-4165; doi:10.3390/molecules14104159

Trametes sp. as a Source of Biopolymer Cross-Linking Agents: Laccase Induced Gelation of Ferulated Arabinoxylans

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Received: 10 September 2009 / Revised: 16 October 2009 / Accepted: 16 October 2009 / Published: 16 October 2009
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This study examined the feasibility of using Trametes sp. grown under drought conditions to catalyze the covalent cross-linking of ferulated arabinoxylans. The rate of polymerization of ferulated arabinoxylans solutions at 0.5% (w/v) was dose dependent on the laccase concentration in the system. Above 1.2 nkat laccase/mg ferulated arabinoxylan, the rate of cross-linking reached a plateau, suggesting that the reaction reached saturation. For 2% (w/v) ferulated arabinoxylans treated with laccase (1.6 nkat/mg ferulated arabinoxylan), stable gels were formed after 4 h at 25 °C, with cross-linking contents (diferulic and triferulic acid) contents of 0.03 and 0.015 μg/mg ferulated arabinoxylan, respectively. This study demonstrated that Trametes sp. can be a source of biopolymer cross-linking enzymes like laccase.
Keywords: polysaccharide; cross-linking; ferulic acid; viscosity; gels polysaccharide; cross-linking; ferulic acid; viscosity; gels
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Castillo, A.; Rascón-Chu, A.; Vargas, G.; Carvajal-Millán, E.; Valenzuela-Soto, E.; Sotelo-Mundo, R.R.; Martínez, A.L. Trametes sp. as a Source of Biopolymer Cross-Linking Agents: Laccase Induced Gelation of Ferulated Arabinoxylans. Molecules 2009, 14, 4159-4165.

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