Comparison of polysaccharides from ginkgo biloba leaves with extracellular polysaccharides from endophytic Lysinibacillus sphaericus Ya6

化学 多糖 银杏 鼠李糖 胞外多糖 阿拉伯糖 抗菌活性 生物化学 细菌 植物 木糖 生物 发酵 遗传学
作者
Keyu Sun,Shuhong Ye,Huiping Wan,Yan Ding,Zhiyang Ma,Congzhi Wei,Chang Liu
出处
期刊:Journal of Molecular Structure [Elsevier]
卷期号:1311: 138299-138299 被引量:2
标识
DOI:10.1016/j.molstruc.2024.138299
摘要

Ginkgo biloba leaf polysaccharide (GBLP) is a biomolecule with various activities such as anti-tumour and anti-inflammatory, but the natural production is low. Extracellular polysaccharide (EPS) was isolated and purified from endophytic Lysinibacillus sphaericus Ya6 of Ginkgo biloba. Similarities in chemical structure and biological activity of two polysaccharides were investigated. Results showed that both polysaccharides are acidic polysaccharides containing pyran rings with characteristic absorption peaks for polysaccharides and carboxylates. The molecular weights varied slightly, with 13.20 kDa and 12.08 kDa for EPSYa6 and GBLP, respectively. GC-MS showed that fucose was present only in EPSYa6, and rhamnose and arabinose were higher in GBLP than in EPSYa6. These gaps above may result in higher antioxidant activity of GBLP than EPSYa6, as verified in free radical scavenging capacity. EPSYa6 and GBLP also have antibacterial effects, and EPSYa6 has a wide antibacterial spectrum. Overall, EPSYa6 has similar chemical structure and same biological activity to GBLP, which provides a theoretical basis for subsequent product development. This study can alleviate the shortage of polysaccharide resources caused by the long growth cycle of ginkgo and the complex natural polysaccharide extraction process, which is conducive to the sustainable development of the ecological environment.
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