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中国生物工程杂志

CHINA BIOTECHNOLOGY
中国生物工程杂志  2009, Vol. 29 Issue (06): 63-67    
研究报告     
一株产凝集素的三叶半夏内生真菌的研究
张晓含1|竺锡武1,2|谭济才2|陈集双1
1. 浙江理工大学生物工程研究所
2. 湖南农业大学
Study on the lectin of endophytic fungus isolated from Pinellia ternata(Thunb.)Breit
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摘要: 研究三叶半夏内生真菌及其凝集素,旨在为半夏内生真菌及其凝集素的开发利用提供依据。对三叶半夏块茎内生真菌分离、纯化,液体发酵培养代谢产物,无水乙醇提取总蛋白,兔血红细胞检测其凝集活性,筛选出菌株gs1,其总蛋白对兔血红细胞凝集活性显著。使用甘露聚糖-Sepharose 4B亲和层析柱纯化菌株gs1总蛋白,得到凝集素。Brandford法定量检测分析表明,1000 ml gs1发酵培养液中含有9.58 mg 凝集素。SDS-PAGE 电泳分析显示该凝集素为单一条带,分子量约为12 kDa。凝集活性实验表明,该凝集素对兔、大鼠和小鼠的血红细胞具有凝集作用,对兔血红细胞效果最显著;而对人(A\B\O\AB型)和鸡的血红细胞无凝集作用。糖结合活性实验表明,甘露糖对该凝集素的凝集活性具有抑制作用。通过初步分类鉴定,菌株gs1为半知菌亚门,丝孢纲,丛梗孢目,丛梗孢科,曲霉属。
关键词: 三叶半夏;内生真菌;凝集素    
Abstract:

Pinellia ternate (Thunb.) Breit is widely used as a kind of traditional Chinese herb for more than two thousands years in China. In our research, endophytic fungus were isolated from Pinellia ternate (Thunb.) Breit. Total proteins were extracted by organic solvent from the fermentation products of the endophytic fungus. The agglutination activity of proteins extracted from the endophytic fungus were studied by erythrocyte of rabbit, and the result showed that the protein from strains gs1 exhibited high lectin activity. The lectin extracted from the strains gs1 was purified by Mannan-Sepharose 4B affinity column. It was indicated by SDS-PAGE that the molecular of the lectin was about 12 kDa. The saccharide binding specificities were studied. The lectin from the strains gs1 showed high affinity with mannose. It was measured by Brandford method that there was 9.58 mg lectin per 1000 ml cultures from the the strains gs1. The agglutination activity of the lectin from the strains gs1 was studied with various erythrocytes, and the result showed that the lectin from the strains gs1 could agglutinate erythrocytes of rabbit, rat and mouse, but could not agglutinate erythrocytes of human (A\B\AB\O type) and chick. The strain gs1 should belong to Aspergillus according to its taxonomic characteristics of the colony on PDA medium.

Key words: Pinellia ternate (Thunb.) Breit;endophytic fungus;lectin
收稿日期: 2008-03-06 出版日期: 2009-07-02
ZTFLH:  Q819  
基金资助:

省部基金

通讯作者: 陈集双     E-mail: chenjs@zstu.edu.cn
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张晓含 竺锡武 谭济才 陈集双

引用本文:

张晓含,竺锡武,谭济才,陈集双. 一株产凝集素的三叶半夏内生真菌的研究[J]. 中国生物工程杂志, 2009, 29(06): 63-67.

ZHANG Xiao-Han- Du-Ti-Wu- Tan-Ji-Cai- Chen-Ji-Shuang. Study on the lectin of endophytic fungus isolated from Pinellia ternata(Thunb.)Breit. China Biotechnology, 2009, 29(06): 63-67.

链接本文:

https://manu60.magtech.com.cn/biotech/CN/        https://manu60.magtech.com.cn/biotech/CN/Y2009/V29/I06/63

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