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- W2765984570 abstract "β-Glucosidase plays an important role in the degradation of cellulose. In this study, a novel β-glucosidase ccbgl1b gene for a glycosyl hydrolase (GH) family 1 enzyme was cloned from the genome of Cellulosimicrobium cellulans and expressed in Escherichia coli BL21 cells. The sequence contained an open reading frame of 1494 bp, encoded a polypeptide of 497 amino acid residues. The recombinant protein CcBgl1B was purified by Ni sepharose fastflow affinity chromatography and had a molecular weight of 57 kDa, as judged by SDS-PAGE. The optimum β-glucosidase activity was observed at 55 °C and pH 6.0. Recombinant CcBgl1B was found to be most active against aryl-glycosides p-nitrophenyl-β-D-glucopyranoside (pNPβGlc), followed by p-nitrophenyl-β-D-galactopyranoside (pNPβGal). Using disaccharides as substrates, the enzyme efficiently cleaved β-linked glucosyl-disaccharides, including sophorose (β-1,2-), laminaribiose (β-1,3-) and cellobiose (β-1,4-). In addition, a range of cello-oligosaccharides including cellotriose, cellotetraose and cellopentaose were hydrolysed by CcBgl1B to produce glucose. The interaction mode between the enzyme and the substrates driving the reaction was modelled using a molecular docking approach. Understanding how the GH1 enzyme CcBgl1B from C. cellulans works, particularly its activity against cello-oligosaccharides, would be potentially useful for biotechnological applications of cellulose degradation." @default.
- W2765984570 created "2017-11-10" @default.
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- W2765984570 date "2017-10-26" @default.
- W2765984570 modified "2023-10-17" @default.
- W2765984570 title "Cloning, expression and biochemical characterization of a GH1 β-glucosidase from <i>Cellulosimicrobium cellulans</i>" @default.
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- W2765984570 doi "https://doi.org/10.1080/10242422.2017.1395415" @default.
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