Isolation and characterization of a novel thermostable lectin from the wild edible mushroom Agaricus arvensis

文献类型： 外文期刊

第一作者： Zhao, J. K.

作者： Zhao, J. K.;Wang, H. X.;Zhao, J. K.;Wang, H. X.;Zhao, Y. C.;Li, S. H.;Ng, T. B.

作者机构：

关键词： Lectin;Mushroom;IC50;Hemagglutinating activity;Agaricus arvensis

期刊名称：JOURNAL OF BASIC MICROBIOLOGY （ 影响因子：2.281； 五年影响因子：2.516 ）

ISSN： 0233-111X

年卷期： 2011 年 51 卷 3 期

页码：

收录情况： SCI

摘要： A thermostable novel lectin with a molecular weight of 30.4 kDa was isolated from dried fruiting bodies of Agaricus arvensis. It was a dimer made up of two 15.2 kDa subunits. The lectin was unadsorbed on DEAE-cellulose in 10 mM phosphate buffer (pH 7.5), subsequently adsorbed on CM-cellulose in 10 mM NaAc buffer (pH 4.6) and then on SP-Sepharose in 10 mM NaAc buffer (pH 4.6), and finally purified by fast protein liquid chromatography-gel filtration on Superdex 75. The hemagglutinating activity of the lectin was stable at temperatures up to 90 degrees C. The activity was preserved in concentrations of NaOH solution up to 50 mM, but was sensitive to HCl and declined to 12.5% in 12.5 mM HCl. The activity was unaffected by Ca2+, Mn2+, Zn2+ and Mg2+ ions, but was activated by Al3+ and Fe3+ ions. Among the carbohydrates tested, only inulin could inhibit the hemagglutinating activity of the lectin. It did not exhibit anti-HIV reverse transcriptase activity. Proliferation of HepG2 and MCF7 tumor cells was inhibited by the lectin with an IC50 of 1.64 and 0.82 mu M, respectively. The lectin was devoid of antifungal activity. The lectin has a remarkable thermostablity and a unique N-terminal amino acid sequence, TYAVLNFVYG. The present report is the first report on a lectin from wild mushroom Agaricus arvensis.

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