title: Purification and characterization of ginsenoside-beta-glucosidase from ginseng.
abstract: The ginsenoside-beta-glucosidase that hydrolyzes the beta-(1-->2)-glucoside of the ginsenoside Rg3 sugar moiety to ginsenoside Rh2 was isolated from the ginseng root, and the enzyme was purified and characterized. The enzyme was purified to one spot in SDS polyacrylamide gel electrophoresis, and its molecular weight was about 59 kDa. The optimum temperature of the ginsenoside-beta-glucosidase was 60 degrees C, and the optimum pH was 5.0. Ca2+ ion had positive effect on ginsenoside-beta-glucosidase, while Cu2+ had negative effect on it. The ginsenoside-beta-glucosidase may be a special beta-glucosidase that is different from the original exocellulase such as beta-glucosidase (EC 3.2.1.21).
authors.affiliation: Department of Biotechnology, Dalian University of Technology, PR China.
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Bao
authors.forename: L
authors.initials: L
authors.lastname: An
authors.forename: F
authors.initials: F
authors.lastname: Jin
mesh_terms: D002848:Chromatography, DEAE-Cellulose; D002855:Chromatography, Thin Layer; D036145:Ginsenosides; D006868:Hydrolysis; D008970:Molecular Weight; D005894:Panax / Q000201:enzymology*; D010936:Plant Extracts / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis; D012503:Saponins / Q000737:chemistry; D001617:beta-Glucosidase / Q000138:chemical synthesis* / Q000302:isolation & purification
chemical_list: D036145:Ginsenosides; D010936:Plant Extracts; D010940:Plant Proteins; D012503:Saponins; C440192:ginsenoside-beta-glucosidase; D001617:beta-Glucosidase