Structure of epiglucan, a highly side-chain/branched (1 --> 3;1 --> 6)-beta-glucan from the micro fungus Epicoccum nigrum Ehrenb. ex Schlecht.
The extracellular fungal polysaccharide, epiglucan, synthesised by Epicoccum nigrum is a side-chain/branched (1 --> 3;1 --> 6)-D-beta-glucan. Methylation analysis, 13C DEPT NMR and specific enzymic digestion data show slight variation in branching frequency among the epiglucans from the three strains examined. The (1 --> 3)-beta-linked backbone has (1 --> 6)-beta-linked branches at frequencies greater than the homologous glucans, scleroglucan and schizophyllan, from Sclerotium spp. and Schizophyllum commune, respectively. The structural analyses do not allow a distinction to be made between structures I and II. [structures: see text] Epiglucan displays non-Newtonian shear thinning rheological properties, typical of these glucans.
Schmid
F
F
Biotechnology Research Centre, La Trobe University, Bendigo, Vic., Australia.
Stone
B A
BA
McDougall
B M
BM
Bacic
A
A
Martin
K L
KL
Brownlee
R T
RT
Chai
E
E
Seviour
R J
RJ
D001203:Ascomycota / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002855:Chromatography, Thin Layer; D043326:Glucan 1,3-beta-Glucosidase; D005936:Glucans / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D013055:Spectrophotometry, Infrared; D001617:beta-Glucosidase / Q000378:metabolism
D005936:Glucans; C033671:epiglucan; D001617:beta-Glucosidase; D043326:Glucan 1,3-beta-Glucosidase