1
|
Vuoristo KS, Fredriksen L, Oftebro M, Arntzen MØ, Aarstad OA, Stokke R, Steen IH, Hansen LD, Schüller RB, Aachmann FL, Horn SJ, Eijsink VGH. Production, Characterization, and Application of an Alginate Lyase, AMOR_PL7A, from Hot Vents in the Arctic Mid-Ocean Ridge. J Agric Food Chem 2019; 67:2936-2945. [PMID: 30781951 DOI: 10.1021/acs.jafc.8b07190] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
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 β-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 °C and pH 6.0, its Km and kcat 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 °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.
Collapse
Affiliation(s)
| | - Lasse Fredriksen
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | - Maren Oftebro
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | - Magnus Ø Arntzen
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | - Olav A Aarstad
- Department of Biotechnology and Food Science , NTNU Norwegian University of Science and Technology , Sem Sælands vei 6/8 , N-7491 Trondheim , Norway
| | - Runar Stokke
- Department of Biological Sciences and KG Jebsen Centre for Deep Sea Research , University of Bergen , N-5020 Bergen , Norway
| | - Ida H Steen
- Department of Biological Sciences and KG Jebsen Centre for Deep Sea Research , University of Bergen , N-5020 Bergen , Norway
| | - Line Degn Hansen
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | - Reidar B Schüller
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | - Finn L Aachmann
- Department of Biotechnology and Food Science , NTNU Norwegian University of Science and Technology , Sem Sælands vei 6/8 , N-7491 Trondheim , Norway
| | - Svein J Horn
- Faculty of Chemistry, Biotechnology and Food Science , Norwegian University of Life Sciences (NMBU) , P.O. Box 5003, N-1432 Aas , Norway
| | | |
Collapse
|