Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus

Brito, Dayane Rodrigues de; Carbonero, Elaine Rosechrer; Viana, Sthefany Rodrigues Fernandes; Silva, Estefânia Viano da; Ruthes, Andrea Caroline; Liao, Luciano Morais; Iacomini, Marcello

Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus

Data

2018

Autores

Brito, Dayane Rodrigues de

Carbonero, Elaine Rosechrer

Viana, Sthefany Rodrigues Fernandes

Silva, Estefânia Viano da

Ruthes, Andrea Caroline

Liao, Luciano Morais

Iacomini, Marcello

Resumo

Pleurotus citrinopileatus, popularly known as “golden oyster mushroom” have medicinal properties, which are attributed mainly to the presence of bioactive polysaccharides. In this work, two partially 3-O-methylated galactans were isolated from the fruiting bodies of this fungus, via successive aqueous extraction, followed by fractionation by freeze-thawing, and precipitation of soluble material with Fehling solution. The structural assignments were carried out using mono- and bidimensional NMR spectroscopy, monosaccharide composition, and methylation analyses. The polysaccharides were characterized as linear, partially 3-O-methylated (1 → 6)-linked α-galactopyranans, containing only Gal and 3-O-Me-Gal, in 2:1 and 1:1 molar ratios, with molar masses of 37.6 × 103 g/mol and 28.5 × 103 g/mol, respectively. Similar structures have been described for other Pleurotus spp., but showing a lower content of 3-O-Me-Gal.

Citação

BRITO, Dayane R. et al. Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus. Carbohydrate Research, Amsterdam, v. 458/459, p. 29-34, 2018. DOI: 10.1016/j.carres.2018.02.002. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S000862151730890X?via%3Dihub. Acesso em: 29 jan. 2024.