In:
Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2020-04-24)
Abstract:
β-glucosidases catalyze the hydrolysis β-1,4, β-1,3 and β-1,6 glucosidic linkages from non-reducing end of short chain oligosaccharides, alkyl and aryl β-D-glucosides and disaccharides. They catalyze the rate-limiting reaction in the conversion of cellobiose to glucose in the saccharification of cellulose for second-generation ethanol production, and due to this important role the search for glucose tolerant enzymes is of biochemical and biotechnological importance. In this study we characterize a family 3 glycosyl hydrolase (GH3) β-glucosidase (Bgl) produced by Malbranchea pulchella ( Mp Bgl3) grown on cellobiose as the sole carbon source. Kinetic characterization revealed that the Mp Bgl3 was highly tolerant to glucose, which is in contrast to many Bgls that are completely inhibited by glucose. A 3D model of Mp Bgl3 was generated by molecular modeling and used for the evaluation of structural differences with a Bgl3 that is inhibited by glucose. Taken together, our results provide new clues to understand the glucose tolerance in GH3 β-glucosidases.
Type of Medium:
Online Resource
ISSN:
2045-2322
DOI:
10.1038/s41598-020-63972-y
DOI:
10.37473/fic/10.1038/s41598-020-63972-y
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2020
detail.hit.zdb_id:
2615211-3