Journal
BIORESOURCE TECHNOLOGY
Volume 329, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124746
Keywords
Cellulase; Biofuels; Fungi; Gene regulation; CAZyme
Funding
- Council of Scientific and Industrial Research and Department of Science and Technology Government of India [CSIR/33/2018/MD-FTT]
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Fungal biomass degrading enzymes are crucial for biorefineries, but limited by the cost of biomass hydrolyzing enzymes. Current research focuses on improving the quantity and quality of enzymes secreted by fungi. Further production enhancements require modifying fungal metabolism.
Lignocellulosic materials are the favoured feedstock for biorefineries due to their abundant availability and noncompletion with food. Biobased technologies for refining these materials are limited mainly by the cost of biomass hydrolyzing enzymes, typically sourced from filamentous fungi. Therefore, considerable efforts have been directed at improving the quantity and quality of secreted lignocellulose degrading enzymes from fungi in order to attain overall economic viability. Process improvements and media engineering probably have reached their thresholds and further production enhancements require modifying the fungal metabolism to improve production and secretion of these enzymes. This review focusses on the types and mechanisms of action of known fungal biomass degrading enzymes, our current understanding of the genetic control exerted on their expression, and possible routes for intervention, especially on modulating catabolite repression, transcriptional regulators, signal transduction, secretion pathways etc., in order to improve enzyme productivity, activity and stability.
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