食品科学

• 工艺技术 • 上一篇    下一篇

弗吉尼亚鼠刺叶片中稀少糖醇生物转化及分离制备

窦德泉1,曾 艳2,朱玥明2,刘 灿2,孙媛霞2   

  1. 1.北京农学院园林学院,北京 102206;2.中国科学院天津工业生物技术研究所 工业酶国家工程实验室,天津 300308
  • 出版日期:2014-11-25 发布日期:2014-12-09
  • 基金资助:

    天津市科技支撑计划重点项目(12ZCZDSY14900);天津市企业博士后创新项目择优资助计划项目

Biotransformation and Purification of Allulose/Allitol from Itea virginica Leaves

DOU De-quan1, ZENG Yan2, ZHU Yue-ming2, LIU Can2, SUN Yuan-xia2   

  1. 1. College of Landscape Architecture, Beijing University of Agriculture, Beijing 102206, China; 2. National Engineering Laboratory
    for Industrial Enzymes, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
  • Online:2014-11-25 Published:2014-12-09

摘要:

为探讨使用鼠刺植物制备稀少糖醇的可能性,以弗吉尼亚鼠刺叶片为原料,热水提取其所含的稀少糖及糖醇,使用产酸克雷伯氏菌静息细胞对提取物的单糖类物质进行生物转化,再利用絮凝、离子树脂色谱分离以及乙醇结晶连用手段对转化的提取物进行纯化,最后使用核磁共振谱对获得的稀少糖醇进行分析鉴定。液相色谱分析结果显示弗吉尼亚鼠刺叶片提取物含有稀少D-阿洛酮糖和蒜糖醇,其质量分数分别为27.86%和7.86%;利用制备的产酸克雷伯氏菌的静息细胞进行60 h催化反应后,提取物中86%的D-阿洛酮糖转化为蒜糖醇,其余被细胞代谢消耗。多种分离纯化手段的联合使用,能有效去除杂质和色素,获得蒜糖醇纯品。

关键词: 弗吉尼亚鼠刺, 稀少糖醇, 提取纯化, 生物转化

Abstract:

In this study, we investigated the possibility of producing rare sugar alcohols from Itea virginica leaves. Hot
water was used to extract rare sugars/sugar alcohols from the leaves of this plant. It was showed that the extract of leaves
contained 27.86% D-psicose and 7.86% allitol. The rare sugars in the extract were transformed by the resting cells of
Klebsiella oxytoca. After 60 h reaction, 86% of D-psicose was converted into allitol, while the rest was consumed by
cellular metabolism. Flocculation, ion exchange resin chromatography and ethanol crystallization were used to analyze the
conversion products. Finally, the purified rare sugar alcohol was identified as allitol by 13CNMR.

Key words: Itea virginica, rare sugar alcohol, purification, biotransformation

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