A novel lectin with highly potent antiproliferative and HIV-1 reverse transcriptase inhibitory activities from cicada (Cicada flammata)

被引:5
作者
Ye, Xiu Juan [1 ]
Ng, Tzi Bun [1 ]
机构
[1] Chinese Univ Hong Kong, Sch Biomed Sci, Fac Med, Shatin, Hong Kong, Peoples R China
关键词
Cicada; Lectin; Antiproliferative; HIV-1 reverse transcriptase; CARBOHYDRATE-BINDING SPECIFICITY; ACID-SPECIFIC LECTIN; C-TYPE LECTIN; PHYSICOCHEMICAL CHARACTERIZATION; BIOLOGICAL-PROPERTIES; SARCOPHAGA-PEREGRINA; CDNA CLONING; PURIFICATION; HEMOLYMPH; PROTEIN;
D O I
10.1007/s00253-009-2363-3
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A dimeric lectin with a molecular weight of 60 kDa and high hemagglutinating activity was isolated from dried cicadas. It was adsorbed on Q-Sepharose and unadsorbed on Affi-Gel Blue gel. Its hemagglutinating activity was stable up to 55 A degrees C and between pH 2 and 13. The activity was inhibited by glucuronic acid and raffinose, K+ ions, and Mg2+ ions. Cicada lectin potently inhibited proliferation of HepG2 hepatoma and MCF 7 breast cancer cells, with an IC50 value of 0.76 and 0.49 A mu M, respectively. It potently inhibited HIV-1 reverse transcriptase activity with an IC50 of 0.36 mu M but was devoid of mitogenic activity on spleen cells. Its N-terminal sequence exhibited slight similarity to a conserved hypothetical protein from Culex quinquefasciatus and a gene product from transcript GH19834-RA of Drosophila grimshawi, but there was no resemblance to lectins from other insects, including Drosophila, Sarcophaga, Glossina, and Aedes species.
引用
收藏
页码:1409 / 1418
页数:10
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