Rhodotorula glutinisが生産する多糖の糖組成について

概要

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Twelve strains of Rhodotorula glutinis were cultured under shaking in an acidic medium to investigate the sugar compositions of extracellular polysaccharides. Polysaccharides produced were separated from the medium by acetone precipitation and the sugar compositions were analyzed by gas-liquid chromatography. The results showed that extracellular polysaccharides of R. glutinis generally consisted of mannose, fucose, and galactose. A strain, IFO 1223, lacked fucose, but contained xylose instead. IFO 0667 contained glucose, which was not found in the other strains. Mannose was the most predominant component in all the strains with the exception of K-24, which produced polysaccharides consisting mostly of fucose and galactose. It was suggested that there were at least two kinds of polysaccharides, one was composed predominantly of mannose and the other of fucose and galactose. In a neutral medium, AJ 4859 produced polysaccharides containing 94% fucose.