A preliminary study on extraction, isolation, purification and structure identification of pleurotus

Page 1

Journal of Modern Agriculture July 2014, Volume 3, Issue 3, PP.42-48

A Preliminary Study on Extraction, Isolation, Purification and Structure Identification of Pleurotus Ostreatus Polysaccharides Xiao Liu 1, Jinxi Wang 1, 2, Lin Gu 1, #, Hai Yu 1 1. College of Food Science and Engineering/Yangzhou University, Yangzhou 225127, China 2. Jiangsu Fufeng Biotechnology Co., Ltd, Jinhu 211600, China #Email: gulin@yzu.edu.cn

Abstract The process for the removal of protein from Pleurotus ostreatus crude polysaccharide was carried out by Sevga treatment after enzymatic hydrolysis. Then isolated by DEAE-cellulose-52 ion exchange column chromatography, POP-I, POP-II and POP-III were obtained and purified by Sephadex G-100 column chromatography again. After that four homogenous pure polysaccharides were got and named POP-I-1, POP-II-1, POP-III-1 and POP-III-2. Neither protein nor nuclear acid characteristic absorption peaks were shown in the UV-visible spectra of POP-I-1and POP-II-1, and the result of IR, TLC and NMR showed they were mainly composed of glucose and α and β glycosidic bond. Keywords: Pleurotus Ostreatus Polysaccharide (POP); Isolation and Purification; UV-Visible Spectra; IR; TLC; NMR

平菇多糖提取分离纯化及其结构鉴定初探* 刘 笑 1,王金玺 1, 2,顾 林 1,于 海 1 1. 扬州大学食品科学与工程学院,江苏 扬州 225127 2. 江苏阜丰生物科技有限公司, 江苏 金湖 211600 摘

要:平菇粗多糖(POP)在 Sevga 试剂和中性蛋白酶联合作用下脱蛋白处理后,经 DEAE-52 分离得到三个不同组分多

糖 POP-I,POP-II 和 POP-III,分别通过 Sephadex G-100 分离纯化进一步得到 POP-I-1,POP-II-1,POP-III-1 和 POP-III-2 四组分纯多糖。对 POP-I-1 和 POP-II-1 进行紫外可见光谱扫描,无蛋白核酸吸收峰。其红外扫描、核磁共振和薄层层析 分析的结果显示,两组分纯多糖主要由葡萄吡喃糖构成,含有 α 与 β 两种构型的糖苷键。 关键词:平菇多糖;分离纯化;紫外可见光谱;红外扫描;薄层层析;核磁共振

引言 平菇(Pleurotus ostreatus)又名白平菇、侧耳,属担子菌亚门,层菌纲,伞菌目,口磨科,是我国种植量 最大的食用菌之一[1]。平菇性味甘、温,是典型的药食两用菌,具有祛风散寒、舒筋通络的功能,对腰腿疼 痛、手脚麻木、筋络不舒等病症有显著的治疗效果[2]。长期食用可降低血糖、血压,增强免疫力,防止血脉 硬化,尤其适用于更年期综合症的调理。 多糖是平菇主要的活性物质,目前多糖的纯化方法主要有蛋白质脱除,树脂和凝胶柱层析等 [3-4],结构 分析方法有红外扫描,核磁共振,气质联用等 [5-7],各种方法的研究也都取得了较好进展。目前,国内有关 平菇多糖提取方法及生物活性的研究较多,而对平菇多糖的分离纯化及结构研究相对较少。本文用热水浸 提平菇多糖,中性蛋白酶和 Sevag 试剂联合脱除蛋白质,经 DEAE-52 和 Sephadex G-100 柱层析分离,对平 *基金资助: “十二五”国家科技支撑计划项目(2012BAD36B05)。

- 42 www.jma-journal.org


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.