کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1388345 | 1500840 | 2015 | 7 صفحه PDF | دانلود رایگان |
• Stress-resistant ascospores accumulate mixtures of novel compatible solutes.
• These oligosaccharides contain an α,α-trehalose backbone.
• One, two or three glucose units are present at one side of the trehalose core.
• Two trehalose-based oligosaccharides are never reported in nature before.
Different fungi, including the genera Neosartorya, Byssochlamys and Talaromyces, produce (asco)spores that survive pasteurization treatments and are regarded as the most stress-resistant eukaryotic cells. Here, the NMR analysis of a series of trehalose-based oligosaccharides, being compatible solutes that are accumulated to high levels in ascospores of the fungus Neosartorya fischeri, is presented. These oligosaccharides consist of an α,α-trehalose backbone, extended with one [α-d-Glcp-(1→6)-α-d-Glcp-(1↔1)-α-d-Glcp; isobemisiose], two [α-d-Glcp-(1→6)-α-d-Glcp-(1→6)-α-d-Glcp-(1↔1)-α-d-Glcp] or three [α-d-Glcp-(1→6)-α-d-Glcp-(1→6)-α-d-Glcp-(1→6)-α-d-Glcp-(1↔1)-α-d-Glcp] glucose units. The tetra- and pentasaccharide, dubbed neosartose and fischerose, respectively, have not been reported before to occur in nature.
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Journal: Carbohydrate Research - Volume 411, 26 June 2015, Pages 49–55