Integrative visual omics of the white-rot fungus Polyporus brumalis exposes the biotechnological potential of its oxidative enzymes for delignifying raw plant biomass.
Francisco J Ruiz-Dueñas,
Igor V. Grigoriev,
Posted 06 Apr 2018
bioRxiv DOI: 10.1101/296152 (published DOI: 10.1186/s13068-018-1198-5)
Posted 06 Apr 2018
White-rot fungi are wood decayers able to degrade all polymers from lignocellulosic biomass including cellulose, hemicelluloses, and lignin. The white-rot fungus Polyporus brumalis efficiently breaks down lignin and is regarded as having a high potential for the initial treatment of plant biomass in its conversion to bio-energy. We performed integrative multi-omics analyses by combining data from the fungal genome, transcriptomes, and secretomes. We found the fungus possessed an unexpectedly large set of genes coding for enzymes related to lignin degradation, and that these were highly expressed and massively secreted under solid-state fermentation conditions. The examination of interrelated multi-omics patterns revealed the coordinated regulation of lignin-active peroxidases and H2O2-generating enzymes along with the activation of cellular mechanisms for detoxification, which combined to result in the efficient lignin breakdown by the fungus.
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