食品科学

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放线菌A0101发酵产物中几丁质酶抑制剂的分离纯化及性质研究

顾东华,张洪斌*,李秋萍,李 瑶,胡雪芹   

  1. 合肥工业大学医学工程学院,安徽 合肥 230009
  • 出版日期:2015-10-15 发布日期:2015-10-20

Purification and Characterization of Chitinase Inhibitor from the Fermentation Products of Actinomycete A0101

GU Donghua, ZHANG Hongbin*, LI Qiuping, LI Yao, HU Xueqin   

  1. School of Medical Engineering, Hefei University of Technology, Hefei 230009, China
  • Online:2015-10-15 Published:2015-10-20

摘要:

实验室前期初筛和复筛得到一株具有高抑制几丁质酶活性的放线菌A0101,本实验通过活性追踪的方法对A0101菌株的发酵产物进行分离纯化,经乙醇醇沉、透析、硅胶柱层析及SephadexG-15凝胶柱层析得到活性物质纯品,高效液相色谱法(high performance liquid chromatography,HPLC)检测显示其在保留时间4.1 min为一单峰,3,5二硝基水杨酸(3,5-dinitrosalicylic acid,DNS)比色法验证其抑制率为80.2%,红外光谱、核磁共振波谱氢谱(1H-nuclear magnetic resonance,1H-NMR)、质谱分析结果初步证明其为一个多羟基的糖类化合物。

关键词: 几丁质酶, 抑制剂, 纯化, 性质

Abstract:

Bombyx mori chitinase was used as the target to screen an actinomycete strain able to inhibit chitinase by
transparent ring plate screening and DNS colorimetric screening methods. The strain A0101 with high inhibitory specificity
was obtained. The activity-guided separation and purification of the fermented products of strain A0101 were carried out
by alcohol precipitation, dialysis, silica gel column chromatography and Sephadex G-15 gel column chromatography, and
a pure bioactive material was obtained. This bioactive material exhibited a single HPLC peak with a retention time of 4.1 min. Its
inhibitory rate on chitinase was evaluated by DNS colorimetric method to be 80.2%. Moreover, it proved to be a multiple hydroxyl
carbohydrate according to the infrared (IR), 1H-nuclear magnetic resonance (NMR) and mass spectrometry analyses.

Key words: chitinase, inhibitor, purification, characteristics

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