Feruloyl Esterases in Biomass Bioconversion
Summary
Feruloyl esterases are specialised carboxylesterases that catalyse the hydrolysis of ester bonds between ferulic acid and complex plant cell-wall polysaccharides. By cleaving these cross-links, they enhance the accessibility of cellulolytic and hemicellulolytic enzymes to lignocellulosic biomass, thus overcoming a major component of biomass recalcitrance. Their activity not only facilitates the efficient release of fermentable sugars for biofuel production but also yields valuable hydroxycinnamic acids with antioxidant and platform-chemical applications. Advances in enzyme discovery, structural biology and protein engineering have expanded the repertoire of feruloyl esterases, revealing diverse substrate specificities among bacterial, fungal and archaeal sources. In parallel, synergistic enzyme cocktails combining feruloyl esterases with xylanases and pectinases have been formulated to optimise hydrolysis of agricultural residues such as wheat bran, corn stalks and sugarcane bagasse. Recent work has also explored acyl-transferase side activities of some feruloyl esterases for the synthesis of phenolic esters. Together, these developments point to a growing toolbox of biocatalysts that can be tailored for integrated biorefinery processes, delivering both renewable fuels and high-value compounds from sustainable feedstocks.
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Feruloyl Esterases in Biomass Bioconversion publication trend
The graph below shows the total number of articles in feruloyl esterases in biomass bioconversion across all publications each year (not limited to Nature Index journals).
Technical terms
Feruloyl esterase: An enzyme that hydrolyses ester bonds linking ferulic acid to plant cell-wall polysaccharides.
Biomass recalcitrance: The resistance of plant cell walls to enzymatic degradation due to complex cross-linking and polymeric structure.
Hydroxycinnamic acids: Aromatic phenolic acids, including ferulic and p-coumaric acids, released from lignocellulosic biomass.
Acyl transferase activity: A side reaction of some esterases enabling transfer of acyl groups to acceptor molecules, used in synthesis of phenolic esters.
Xylanase synergy: The cooperative action of xylanolytic enzymes with feruloyl esterases to enhance breakdown of hemicellulose.
References
- Enhancing the Hydrolysis and Acyl Transfer Activity of Carboxylesterase DLFae4 by a Combinational Mutagenesis and In-Silico Method. Foods (2023).
- Feruloyl Esterase (LaFae) from Lactobacillus acidophilus: Structural Insights and Functional Characterization for Application in Ferulic Acid Production. International Journal of Molecular Sciences (2023).
- Characterization of Feruloyl Esterase from Klebsiella oxytoca Z28 and Its Application in the Release of Ferulic Acid from De-Starching Wheat Bran. Microorganisms (2023).
- Feruloyl esterases: Biocatalysts to overcome biomass recalcitrance and for the production of bioactive compounds. Bioresource Technology (2019).
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