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Studies related to Norway spruce galactoglucomannans: Chemical synthesis, conformation analysis, NMR spectroscopic characterization, and molecular recognition of model compounds

机译:与挪威云杉半乳糖甘露聚糖有关的研究:化学合成,构象分析,NMR光谱表征和模型化合物的分子识别

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摘要

Galactoglucomannan (GGM) is a polysaccharide mainly consisting of mannose, glucose, and galactose. GGM is the most abundant hemicellulose in the Norway spruce (Picea abies), but is also found in the cell wall of flax seeds, tobacco plants, and kiwifruit. Although several applications for GGM polysaccharides have been developed in pulp and paper manufacturing and the food and medical industries, attempts to synthesize and study distinct fragments of this polysaccharide have not been reported previously. Herein, the synthesis of one of the core trisaccharide units of GGM together with a less-abundant tetrasaccharide fragment is described. In addition, detailed NMR spectroscopic characterization of the model compounds, comparison of the spectral data with natural GGM, investigation of the acetyl-group migration phenomena that takes place in the polysaccharide by using small model compounds, and a binding study between the tetrasaccharide model fragment and a galactose-binding protein (the toxin viscumin) are reported.
机译:半乳葡甘露聚糖(GGM)是主要由甘露糖,葡萄糖和半乳糖组成的多糖。 GGM是挪威云杉(Picea abies)中含量最高的半纤维素,但也存在于亚麻籽,烟草植物和奇异果的细胞壁中。尽管在制浆和造纸业以及食品和医疗工业中已开发了GGM多糖的几种应用,但以前尚未报道过尝试合成和研究这种多糖的不同片段的尝试。在此,描述了GMG的核心三糖单元之一与较少丰度的四糖片段的合成。此外,还对模型化合物进行了详细的NMR光谱表征,与天然GGM的光谱数据进行比较,使用小模型化合物对多糖中发生的乙酰基迁移现象进行了研究,以及四糖模型片段之间的结合研究。并报道了半乳糖结合蛋白(毒素粘菌素)。

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