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Title: Conserved white-rot enzymatic mechanism for wood decay in the Basidiomycota genus Pycnoporus

Journal Article · · DNA Research
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  1. Aix Marseille Univ. (France). Biodiversity and Biotechnology of Fungi. INRAE; Université de Lorraine, Nancy (France). Interactions Arbres/Microorganismes. INRAE
  2. Aix Marseille Univ. (France). Biodiversity and Biotechnology of Fungi. INRAE
  3. Aix Marseille Univ. (France). Biodiversity and Biotechnology of Fungi. INRAE; Aix Marseille Univ. (France). INRAE. CIRM-CF
  4. INRAE, UMR1163, Biodiversity and Biotechnology of Fungi, Aix Marseille University, 13009 Marseille, France
  5. US Department of Energy, Joint Genome Institute, Walnut Creek, CA, USA
  6. INRAE, UMR1319, Micalis, Plateforme d’Analyse Protéomique de Paris Sud-Ouest, Jouy-en-Josas, France
  7. INRAE, Genotoul Bioinfo, UR875, Mathématiques et Informatique Appliquées de Toulouse, Castanet-Tolosan, France
  8. USDA Forest Products Laboratory, Madison, WI, USA
  9. Fungal Physiology, Westerdijk Fungal Biodiversity Institute and Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands; Department of Microbiology, University of Helsinki, Helsinki, Finland
  10. Department of Biology, Southeast Missouri State University, Cape Girardeau, MI, USA
  11. CNRS, UMR7257, AFMB, Aix Marseille University, Marseille, France; INRAE, USC1408, AFMB, Marseille, France
  12. Department of Microbiology, University of Helsinki, Helsinki, Finland
  13. Department of Molecular Wood Biotechnology and Technical Mycology, Büsgen-Institute, Georg-August-University Göttingen, Göttingen, Germany; Center for Molecular Biosciences (GZMB), Georg-August-University Göttingen, Göttingen, Germany
  14. Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
  15. INRAE, UMR1136, Interactions Arbres/Microorganismes, Université de Lorraine, Nancy, France
  16. Molecular Microbiology and Biotechnology, Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
  17. Microbiology, Utrecht University, Utrecht, The Netherlands
  18. US Department of Energy, Joint Genome Institute, Walnut Creek, CA, USA; Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, USA

White-rot (WR) fungi are pivotal decomposers of dead organic matter in forest ecosystems and typically use a large array of hydrolytic and oxidative enzymes to deconstruct lignocellulose. However, the extent of lignin and cellulose degradation may vary between species and wood type. Here, we combined comparative genomics, transcriptomics and secretome proteomics to identify conserved enzymatic signatures at the onset of wood-decaying activity within the Basidiomycota genus Pycnoporus. We observed a strong conservation in the genome structures and the repertoires of protein-coding genes across the four Pycnoporus species described to date, despite the species having distinct geographic distributions. We further analysed the early response of P. cinnabarinus, P. coccineus and P. sanguineus to diverse (ligno)-cellulosic substrates. We identified a conserved set of enzymes mobilized by the three species for breaking down cellulose, hemicellulose and pectin. The co-occurrence in the exo-proteomes of H2O2-producing enzymes with H2O2-consuming enzymes was a common feature of the three species, although each enzymatic partner displayed independent transcriptional regulation. Finally, cellobiose dehydrogenase-coding genes were systematically co-regulated with at least one AA9 lytic polysaccharide monooxygenase gene, indicative of enzymatic synergy in vivo. This study highlights a conserved core white-rot fungal enzymatic mechanism behind the wood-decaying process.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
UMR INRAE Research Collaboration
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1816251
Journal Information:
DNA Research, Vol. 27, Issue 2; ISSN 1340-2838
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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