食品科学 ›› 2017, Vol. 38 ›› Issue (18): 106-112.doi: 10.7506/spkx1002-6630-201718017

• 成分分析 • 上一篇    下一篇

1 种水溶性霸王花多糖的分离纯化及结构鉴定

何慕雪,孟凡成,王春明,李绍平,王英,叶文才,张庆文   

  1. (1.澳门大学中华医药研究院,中药质量研究国家重点实验室,澳门 999078;2.暨南大学中药及天然药物研究所,广东?广州 510632)
  • 出版日期:2017-09-25 发布日期:2017-09-04
  • 基金资助:
    科技部港澳台科技合作专项(2013DFM30080);澳门科学技术发展基金项目(042/2014/A1;013/2008/A1)

Isolation, Purification and Structural Characterization of a Water-Soluble Polysaccharide from the Flower of Hylocereus undatus (Haw.) Britton & Rose

HE Muxue, MENG Fancheng, WANG Chunming, LI Shaoping, WANG Ying, YE Wencai, ZHANG Qingwen   

  1. (1. State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; 2. Institute of Traditional Chinese Medicine and Natural Products, Jinan University, Guangzhou 510632, China)
  • Online:2017-09-25 Published:2017-09-04

摘要: 目的:从霸王花中提取分离和纯化多糖,并对其理化性质、光谱学特征和结构特征进行研究。方法:霸王花经水提醇沉、脱蛋白、冷冻干燥得到水溶性粗多糖(hylocereus undatus polysaccharide,HUP),再通过DEAE-Cellulose 52纤维素柱和Sephadex G-100凝胶柱层析分离纯化,得到1种水溶性均一多糖HUP0。对获得的纯化组分采用傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FT-IR)、高效分子排阻色谱、气相色谱-质谱联用和核磁共振波谱(nuclear magnetic resonance,NMR)等方法进行化学结构分析。结果:经纯化后得到均一的霸王花多糖样品HUP0,分子质量为33.24?kD,特性黏度(η)为47.16?mL/g,比旋度为+69°,平均粒径为196.96?nm;FT-IR图谱结果表明HUP0是中性糖且以β-构型为主;结合高效液相色谱、单糖组成、甲基化分析、NMR对HUP0的结构进行鉴定分析后,表明HUP0为(1→4)-β-D-半乳聚糖。

关键词: 霸王花, 多糖, 结构特征, 半乳聚糖

Abstract: Objective: To extract and purify polysaccharide fractions from the flower of Hylocereus undatus (Haw.)(H. undatus) Britton & Rose and investigate their physicochemical, spectroscopic, and structural properties. Methods: The crude water-soluble polysaccharide (HUP) was extracted, precipitated, deproteinized and lyophilized from flower of H. undatus. A homogeneous polysaccharide fraction, designated HUP0, was obtained by consecutive DEAE-cellulose and Sephadex G-100 column chromatography. Structural characterization of the polysaccharide fraction was conducted using high performance size exclusion chromatography coupled with multi-angle laser light scattering and refractive index detection (HPSEC-MALLS-RID), Fourier transform infrared (FT-IR) spectroscopy, high performance liquid chromatography (HPLC), gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR) spectroscopy. Results: The weight-average molecular mass, intrinsic viscosity, specific rotation and mean diameter of HUP0 were measured to be 33.24 kD, 47.16 mL/g, +69°, and 196.96 nm, respectively. The FT-IR spectra showed that HUP0 was a neutral polysaccharide, which mainly contained β-configuration. Methylation, HPLC and NMR analyses indicated that HUP0 was a (1→4)-β-D-galactan.

Key words: flower of Hylocereus undatus (Haw.) Britton & Rose, polysaccharide, structural characterization, galactan

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