期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 10, 页码 2936-2945出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.8b07190
关键词
alginate lyase; brown seaweed; Saccharina latissima; biorefining; PolyM; salt tolerance
资金
- Research Council of Norway [229003, 237841, 221568]
- NorBioLab by the Research Council of Norway [226247, 270038]
Enzymatic depolymerization of seaweed polysaccharides is gaining interest for the production of functional oligosaccharides and fermentable sugars. We describe a thermostable alginate lyase belonging to Polysaccharide Lyase family 7 (PL7), which can be used to degrade brown seaweed, Saccharina latissima, at conditions also suitable for a commercial cellulase cocktail (Cellic CTec2). This enzyme, AMOR_PL7A, is a beta-D-mannuronate specific (EC 4.2.2.3) endoacting alginate lyase, which degrades alginate and poly mannuronate within a broad range of pH, temperature and salinity. At 65 degrees C and pH 6.0, its Km and k(cat) values for sodium alginate are 0.51 +/- 0.09 mg/mL and 7.8 +/- 0.3 s(-1) respectively. Degradation of seaweed with blends of Cellic CTec2 and AMOR_PL7A at 55 degrees C in seawater showed that the lyase efficiently reduces viscosity and increases glucose solublization. Thus, AMOR_PL7A may be useful in development of efficient protocols for enzymatic seaweed processing.
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