title: The structure of the glucuronoxylomannan produced by culinary-medicinal yellow brain mushroom (Tremella mesenterica Ritz.:Fr., Heterobasidiomycetes) grown as one cell biomass in submerged culture.
abstract: The yellow brain mushroom Tremella mesenterica possesses a wide spectrum of medicinal properties, including immunostimulating, protecting against radiation, antidiabetic, anti-inflammatory, hypocholesterolemic, hepatoprotective, and antiallergic effects. A unique feature of T. mesenterica is that most of the above mentioned medicinal properties depend on glucuronoxylomannan (GXM) contained in fruiting bodies or produced in pure culture conditions. We developed a new strain of T. mesenterica CBS 101939, which grows in submerged culture and offers superior yields of one-cell biomass rich in exocellular heteropolysaccharide GXM. The structure of the GXM was analyzed by NMR spectroscopy and chemical methods. The polysaccharide has a defined repeating unit structure, which is O-acetylated at several points: [structure: see text]. These results differ from previously published structure of Tremella extracellular polysaccharides, where mannan backbone was believed to be randomly glycosylated with xylan chains of different length.
authors.affiliation: Institute for Biological Sciences, National Research Council, 100 Sussex Dr., Ottawa, ON, Canada K1A 0R6. evguenii.vinogradov@nrc-cnrc.gc.ca
authors.forename: Evgeny
authors.initials: E
authors.lastname: Vinogradov
authors.forename: Bent O
authors.initials: BO
authors.lastname: Petersen
authors.forename: Jens Ø
authors.initials: JØ
authors.lastname: Duus
authors.forename: Solomon
authors.initials: S
authors.lastname: Wasser
mesh_terms: D000363:Agaricales / Q000737:chemistry* / Q000166:cytology / Q000254:growth & development*; D018533:Biomass; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000096:biosynthesis* / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D011134:Polysaccharides; C027478:glucuronoxylomannan