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A novel fungal metal-dependent α-l-arabinofuranosidase of family 54 glycoside hydrolase shows expanded substrate specificity
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A novel fungal metal-dependent α-l-arabinofuranosidase of family 54 glycoside hydrolase shows expanded substrate specificity
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Journal Article
A novel fungal metal-dependent α-l-arabinofuranosidase of family 54 glycoside hydrolase shows expanded substrate specificity
2021
Overview
Trichoderma
genus fungi present great potential for the production of carbohydrate-active enzymes (CAZYmes), including glycoside hydrolase (GH) family members. From a renewability perspective, CAZYmes can be biotechnologically exploited to convert plant biomass into free sugars for the production of advanced biofuels and other high-value chemicals. GH54 is an attractive enzyme family for biotechnological applications because many GH54 enzymes are bifunctional. Thus, GH54 enzymes are interesting targets in the search for new enzymes for use in industrial processes such as plant biomass conversion. Herein, a novel metal-dependent GH54 arabinofuranosidase (ThABF) from the cellulolytic fungus
Trichoderma harzianum
was identified and biochemically characterized. Initial in silico searches were performed to identify the GH54 sequence. Next, the gene was cloned and heterologously overexpressed in
Escherichia coli
. The recombinant protein was purified, and the enzyme’s biochemical and biophysical properties were assessed. GH54 members show wide functional diversity and specifically remove plant cell substitutions including arabinose and galactose in the presence of a metallic cofactor. Plant cell wall substitution has a major impact on lignocellulosic substrate conversion into high-value chemicals. These results expand the known functional diversity of the GH54 family, showing the potential of a novel arabinofuranosidase for plant biomass degradation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/61
/ Biodegradation, Environmental
/ Biofuels
/ Biomass
/ Cations, Divalent - chemistry
/ E coli
/ Enzymes
/ Fungal Proteins - classification
/ Fungal Proteins - isolation & purification
/ Fungal Proteins - metabolism
/ Glycoside Hydrolases - classification
/ Glycoside Hydrolases - genetics
/ Glycoside Hydrolases - isolation & purification
/ Glycoside Hydrolases - metabolism
/ Humanities and Social Sciences
/ Polysaccharides - metabolism
/ Recombinant Proteins - metabolism
/ Science
