Specific Xylan Activity Revealed for AA9 Lytic Polysaccharide Monooxygenases of the Thermophilic Fungus Malbranchea cinnamomea by Functional Characterization

• Silvia Hüttner ^[2] ; Anikó Várnai ^[1] ; Dejan M. Petrović ^[1] ; Cao Xuan Bach ^[3] ; Dang Thi Kim Anh ^[3] ; Vu Nguyen Thanh ^[3] ; Vincent G. H. Eijsink ^[1] ; Johan Larsbrink ^[2] ; Lisbeth Olsson ^[2]
  1. [1] Norwegian University of Life Sciences

     Norwegian University of Life Sciences

     Noruega

     
  2. [2] a Department of Biology and Biological Engineering, Division of Industrial Biotechnology, Chalmers University of Technology, Gothenburg, Sweden; b Wallenberg Wood Science Center, Chalmers University of Technology, Gothenburg, Sweden
  3. [3] d Centre for Industrial Microbiology, Food Industries Research Institute, Hanoi, Vietnam

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• Localización: Applied and Environmental Microbiology, ISSN 0099-2240, Vol. 85, Nº 23, 2019
• Idioma: inglés
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  • The Malbranchea cinnamomea LPMOs (McAA9s) showed activity on a broad range of soluble and insoluble substrates, suggesting their involvement in various steps of biomass degradation besides cellulose decomposition. Our results indicate that the fungal AA9 family is more diverse than originally thought and able to degrade almost any kind of plant cell wall polysaccharide. The discovery of an AA9 that preferentially cleaves xylan enhances our understanding of the physiological roles of LPMOs and enables the use of xylan-specific LPMOs in future applications.