Large-scale preparation of β-1,2-glucan using quite a small amount of sophorose.

Large-scale preparation of β-1,2-glucan using quite a small amount of sophorose. Biosci Biotechnol Biochem. 2019 Jun 12;:1-8 Authors: Kobayashi K, Nakajima M, Aramasa H, Kimura S, Iwata T, Nakai H, Taguchi H Abstract A large amount of β-1,2-glucan was produced enzymatically from quite a small amount of sophorose as an acceptor material through three synthesis steps using a sucrose phosphorylase and a 1,2-β-oligoglucan phosphorylase. The first synthesis step was performed in a 200 μL of a reaction solution containing 5 mM sophorose and 1.0 M sucrose. β-1,2-Glucan in a part of the resultant solution was hydrolyzed to β-1,2-glucooligosaccharides by a β-1,2-glucanase. The second synthesis was performed in 25 times the volume for the first synthesis. The hydrolysate solution (1% volume of the reaction solution) was used as an acceptor. After treatment with the β-1,2-glucanase again, the third synthesis was performed 200 times the volume for the second synthesis (1 L). The reaction yield of β-1,2-glucan at each synthesis was 93%, 76% and 91%. Finally, more than 140 g of β-1,2-glucan was synthesized using approximately 20 μg of sophorose as the starting acceptor material. Abbreviations: DPs: degrees of polymerization; SOGP: 1,2-β-oligoglucan phosphorylase; Sopns: β-1,2-glucooligosaccharides with DP of n; Glc1P: α-glucose 1-phosphate; SucP: sucrose phosphorylase from Bifidobacterium longum subsp. longum; SGL: β-1,2-glucana...
Source: Bioscience, Biotechnology, and Biochemistry - Category: Biochemistry Authors: Tags: Biosci Biotechnol Biochem Source Type: research