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首页> 外文期刊>Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides >Carbohydrates present in the glycoprotein from conidia of the opportunistic pathogen Scedosporium prolificans
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Carbohydrates present in the glycoprotein from conidia of the opportunistic pathogen Scedosporium prolificans

机译：Carbohydrates present in the glycoprotein from conidia of the opportunistic pathogen Scedosporium prolificans

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摘要

Hot aqueous extraction of conidia of Scedosporium prolificans gave a heterogeneous glycoprotein (RMP-Sp-Coni) with 41 protein and 2MeRha, Rha, Ara, Man, Gal, Glc, and GlcNH2 in a 2:18:3:47:9:15:6 M ratio, the first report of 2-O-methylrhamnose in fungi. Methylation analysis showed nonreducing end-(10), 2-O- (11), and 3-O-substituted Rhap (7), nonreducing end- (8), 2-O- (12), 3-O- (16), and 2,6-di-O-substituted Manp (9), nonreducing end- (4), 3-O- (7), and 4-O-substituted Glcp (7), and nonreducing end-units of Galp (9). Mild reductive β-elimination of RMP-Sp-Coni cleaved O-linked structures to give a mixture of oligosaccharides, of which 2MeRha capping groups were present in 2MeRhaRha2Hex2Hex-ol, 2MeRhaRha2Hex-Hex-ol, 2MeRhaRha2HexHex-ol, and 2MeRhaRha2Hex-ol (ESI-MS-MS). The mixture was fractionated by Biogel P-2 column chromatography and the two predominant isolates were β-D-Galp-(1→ 6)-2Me-α-L-Rhap-(1 → 3)-α-L-Rhap-(1→ 3)-α-D-Manp-(1→ 2)-d-Man-ol, and another lacking the β-Galp unit. Neither was formed from mycelial glycoprotein, although β-D-Galp-(1→ 6)-α-L-Rhap-(1→ 3)-α-L-Rhap-(1→ 3)-α-D-Manp-(1→ 2)-D-Man-ol was a common component.

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