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Structural elucidation of a heteroglycan from the fruiting bodies of Agaricus blazei Murill. 2011

Jicheng Liu, and Chunjing Zhang, and Yajun Wang, and Haitao Yu, and Han Liu, and Liping Wang, and Xiuzhen Yang, and Zhecheng Liu, and Xianchun Wen, and Yongxu Sun, and Chunlei Yu, and Lei Liu
Qiqihar Medical University, Qiqihar, PR China. jichengliu@yahoo.cn

One water-soluble polysaccharide (ABP-W1) was purified from the fruiting bodies of Agaricus blazei by DEAE Sepharose Fast Flow and Sepharose 6 Fast Flow column chromatography. Its molecular weight was about 3.9×10(2) kDa as determined by high-performance size-exclusion chromatography (HPSEC). The structural feature of ABP-W1 was investigated by a combination of chemical and instrumental analysis, including partial hydrolysis with acid, periodate oxidation-Smith degradation, acetylation, methylation analysis and nuclear magnetic resonance spectroscopy (NMR (1)H, (13)C). The results revealed that ABP-W1 had a backbone consisting of (1→6)-linked-α-D-galactopyranosyl and (1→2,6)-linked-α-D-glucopyranosyl, which was branched with one single terminal (1→)-α-D-glucopyranosyl at the O-2 position of (1→2,6)-linked-α-D-glucopyranosyl along the main chain in the ratio of 1:1:1. The observation of the complex-formation between ABP-W1 and Congo Red indicated that ABP-W1 probably existed in a triple-strand helical conformation in water. Based on the data obtained, ABP-W1 was composed of a repeating unit with a structure as below: [structure: see text].

UI MeSH Term Description Entries
D008745 Methylation Addition of methyl groups. In histo-chemistry methylation is used to esterify carboxyl groups and remove sulfate groups by treating tissue sections with hot methanol in the presence of hydrochloric acid. (From Stedman, 25th ed) Methylations
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D011134 Polysaccharides Long chain polymeric CARBOHYDRATES composed of MONOSACCHARIDES linked by glycosidic bonds. Glycan,Glycans,Polysaccharide
D002850 Chromatography, Gel Chromatography on non-ionic gels without regard to the mechanism of solute discrimination. Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D000364 Agaricus A basidiomycetous fungal genus of the family Agaricaceae, order Agaricales, which includes the field mushroom (A. campestris) and the commercial mushroom (A. bisporus).
D017550 Spectroscopy, Fourier Transform Infrared A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained. FTIR,Fourier Transform Infrared Spectroscopy,Spectroscopy, Infrared, Fourier Transform
D048690 Fruiting Bodies, Fungal The fruiting 'heads' or 'caps' of FUNGI, which as a food item are familiarly known as MUSHROOMS, that contain the FUNGAL SPORES. Basidiocarp,Basidiocarps,Bodies, Fungal Fruiting,Body, Fungal Fruiting,Fruiting Body, Fungal,Fungal Fruiting Bodies,Fungal Fruiting Body

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