Li Feng, Jin Yu, Wang Jun, Xu Huaide
College of Food Science and Engineering, Northwest A&F University, Yangling, Xianyang 712100, China.
Foods. 2022 Mar 28;11(7):982. doi: 10.3390/foods11070982.
Mushrooms of the genus exhibit a variety of biological activities. Two polysaccharides (MSP1-1, 389.0 kDa; MSP1-2, 23.4 kDa) were isolated from by subcritical water extraction and column chromatography fractionation. Methylation and nuclear magnetic resonance analysis determined MSP1-1 as a glucan with a backbone of (1→4)-α-D-glucan branched at O-6, and MSP1-2 as a galactomannan with coextracted α-glucan. Light scattering analysis and transmission electron microscopy revealed that MSP1-1 possessed a random coil chain and that MSP1-2 had a network chain. This is the first time that a network structure has been observed in a polysaccharide from . Despite the differences in their chemical structures and conformations, both MSP1-1 and MSP1-2 possessed good thermal stability and showed antioxidant activity. This study provides fundamental data on the structure-activity relationships of polysaccharides.
该属蘑菇具有多种生物活性。通过亚临界水萃取和柱色谱分级分离，从[具体来源未给出]中分离出两种多糖（MSP1-1，389.0 kDa；MSP1-2，23.4 kDa）。甲基化和核磁共振分析确定MSP1-1为一种葡聚糖，其主链为（1→4）-α-D-葡聚糖且在O-6位有分支，MSP1-2为一种半乳甘露聚糖并伴有共提取的α-葡聚糖。光散射分析和透射电子显微镜显示MSP1-1具有无规卷曲链，而MSP1-2具有网络链。这是首次在[具体来源未给出]的多糖中观察到网络结构。尽管它们的化学结构和构象存在差异，但MSP1-1和MSP1-2均具有良好的热稳定性并表现出抗氧化活性。本研究提供了关于[具体来源未给出]多糖结构-活性关系的基础数据。
