title: Cyclosophoraose as a catalytic carbohydrate for methanolysis.
abstract: A novel catalytic methanolysis can be induced by a natural cyclooligosaccharide, a cyclosophoraose (cyclic-(1-->2)-beta-D-glucan, Cys), which is a member of a family of unbranched cyclooligosaccharides produced as intra- or extraoligosaccharides by soil microorganisms of the genus, Rhizobium. Cys catalyzed the methanolysis for 5(4H)-oxazolones and various phospholipids. Cys enhanced the methanolysis reaction about 9200-fold for a benzylidene oxazolone or 250-fold for dipalmitoylphosphatidylcholine comparing with control. In this study, we describe that natural cyclosophoraoses isolated from the Rhizobium species function as catalytic carbohydrates for the methanolysis.
authors.affiliation: Department of Microbial Engineering and Bio/Molecular Informatics Center, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea.
authors.forename: Sanghoo
authors.initials: S
authors.lastname: Lee
authors.forename: Seunho
authors.initials: S
authors.lastname: Jung
mesh_terms: D015060:1,2-Dipalmitoylphosphatidylcholine / Q000378:metabolism; D002236:Carbohydrate Conformation; D002384:Catalysis; D005936:Glucans / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008697:Methane / Q000378:metabolism*; D008958:Models, Molecular; D015394:Molecular Structure; D012231:Rhizobium / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D047071:beta-Glucans
chemical_list: D005936:Glucans; D047071:beta-Glucans; C080135:cyclic beta(1-2)glucan; D015060:1,2-Dipalmitoylphosphatidylcholine; D008697:Methane