食品科学 ›› 2018, Vol. 39 ›› Issue (16): 247-255.doi: 10.7506/spkx1002-6630-201816036

• 成分分析 • 上一篇    下一篇

三叶青原花青素结构分析

李?鑫1,刘景玲1,李?彦1,郭万里2,王大巾2,梁宗锁1,2,*   

  1. (1.西北农林科技大学生命科学学院,陕西?杨凌 712100;2.浙江理工大学生命科学学院,浙江?杭州 310018)
  • 出版日期:2018-08-25 发布日期:2018-08-17
  • 基金资助:
    陕西省重大产业集群项目(2012KTCL02-07);“十二五”国家科技支撑计划项目(2015BAC01B03)

Structural Analysis of Proanthocyanidins from Tetrastigma hemsleyanum Diels et Gilg

LI Xin1, LIU Jingling1, LI Yan1, GUO Wanli2, WANG Dajin2, LIANG Zongsuo1,2,*   

  1. (1. College of Life Sciences, Northwest A&F University, Yangling 712100, China;2. College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China)
  • Online:2018-08-25 Published:2018-08-17

摘要: 利用核磁共振碳谱、反相高效液相色谱-电喷雾质谱联用技术联合基质辅助激光解析离子化飞行时间质谱(matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOF MS)技术对三叶青根、茎及叶原花青素进行结构分析。结果表明,三叶青原花青素主要由原花青定和原翠雀定构成,末端单元以儿茶素为主,延伸单元以表儿茶素和表没食子儿茶素为主。三叶青根、茎及叶原花青素的平均聚合度分别为4.89±0.33、3.77±0.19及4.45±0.48。利用MALDI-TOF MS检测出三叶青根、茎原花青素的三聚体到十聚体,叶原花青素的三聚体到十一聚体。每个聚体内部普遍存在(表)儿茶素和(表)没食子儿茶素结构单元,没食子酰基化以及A型连接。三叶青根、茎及叶原花青素在结构上具有一定的相似性。本研究结果可为三叶青原花青素的基础研究和开发利用提供一定参考。

关键词: 三叶青, 原花青素, 核磁共振碳谱, 反相高效液相色谱-电喷雾质谱联用技术, 基质辅助激光解析离子化飞行时间质谱

Abstract: The structures of proanthocyanidins from the root, stem and leaves of Tetrastigma hemsleyanum Diels et Gilg were analyzed with 13C nuclear magnetic resonance (13C NMR), reversed-phase high performance liquid chromatography electrospray ionization mass spectrometry (RP-HPLC-ESI-MS) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The results showed that the proanthocyanidins from T. hemsleyanum were mainly composed of procyanidin (PC) and prodelphinidin (PD). The terminal units were mainly composed of catechin while epicatechin and epigallocatechin were the dominant extension units. The mean degree of polymerization (mDP) of proanthocyanidins from the root, stem and leaves of T. hemsleyanum were found to be 4.89 ± 0.33, 3.77 ± 0.19 and 4.45 ± 0.48, respectively. Trimers to decamers of proanthocyanidins were detected from the root and stem, while trimers to undecamers of proanthocyanidins from the leaves of T. hemsleyanum by MALDI-TOF MS. (epi) Catechin and (epi) gallocatechin monomer units individually and together with galloyl substituents and a-type linkages prevalently existed in each polymeric cluster. The proanthocyanidins from the root, stem and leaves of T. hemsleyanum were structurally similar. The results of this study may provide useful data for the fundamental study and further development of T. hemsleyanum.

Key words: Tetrastigma hemsleyanum Diels et Gilg, proanthocyanidins, 13C nuclear magnetic resonance (13C NMR), reversed-phase high performance liquid chromatography-electrospray ionization mass spectrometry (RP-HPLC-ESI-MS), matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS)

中图分类号: