Taxonomic group: fungi / Basidiomycota
(Phylum: Basidiomycota)
Organ / tissue: sclerotium
Publication DOI: 10.1016/S0008-6215(97)00172-9Journal NLM ID: 0043535Publisher: Elsevier
Institutions: Department of Chemistry, Wuhan University, Wuhan, China, National Research Center for Certified Reference Materials, Beijing, China
The weight-average molecular weights Mw and intrinsic viscosities [ν] of linear β-(1→3)-D-glucan (PC3), a major polysaccharide in Poria cocos sclerotium were studied by light scattering and viscometry. The Mw values of glucan PC3 fractions in 20% cadoxen solution and in cadoxen were 20.6 × 104and 8.93 × 104, respectively. The [ν] values of glucan PC3 in water-cadoxen mixtures underwent an almost discontinuous decrease in the range from 20 to 30% cadoxen. The data (Mw,[ν]) of the unfractionated PC3 and of two fractions in 20% cadoxen and in cadoxen showed that glucan PC3 forms aggregates in 20% cadoxen solution, and dissociates to single chains in cadoxen. The change of aggregation and disaggregation in water-cadoxen mixtures are reversible.
polysaccharide, light scattering, molecular weight, aggregation, intrinsic viscosity, Poria cocos
Structure type: homopolymer ; 89300-206000
Location inside paper: β-(1→3)-D-glucan, PC3, in text
Compound class: glucan
Contained glycoepitopes: IEDB_1397514,IEDB_142488,IEDB_146664,IEDB_153543,IEDB_158555,IEDB_161166,IEDB_2278476,IEDB_2278477,IEDB_558869,IEDB_857743,IEDB_983931,SB_192
Methods: viscosity measurement, dialysis, dynamic light scattering
NCBI Taxonomy refs (TaxIDs): 81056Reference(s) to other database(s): GTC:G51056AN
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There is only one chemically distinct structure:
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(later renamed to: Wolfiporia cocos)