中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (2): 10-100.

• 论著 • 上一篇    下一篇

日本血吸虫谷胱甘肽-S-转移酶基因和产毒大肠杆菌纤毛抗原基因的联合表达

张威1,张景六2,刘述先1
  

  1. 1 中国预防医学科学院寄生虫病研究所 上海 2000252 中国科学院上海植物生理研究所 上海 200032
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-04-30 发布日期:1999-04-30

ASSOCIATION EXPRESSION OF GENES ENCODING GST OF SCHISTOSOMA JAPONICUM AND ENTEROTOXIGENIC ESCHERICHIA COLI *

ZHANG Wei 1;ZHANG Jingliu 2;LIU Shuxian 1

  

  1. 1 Institute of Parasitic Diseases;Chinese Academy of Preventive Medicine **;Shanghai 200025 2 Shanghai Institute of Plant Physiology;Academic Sinica;Shanghai 200032
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-04-30 Published:1999-04-30

摘要:   目的:编码日本血吸虫26kDaGST和产毒大肠杆菌纤毛抗原K99基因的联合表达。方法:PCR扩增的K99基因克隆入pUC18载体,再将限制性酶切获得的GST基因克隆入pUC18-K99重组质粒。限制性酶切和琼脂糖凝胶电泳选择连接方向正确的重组质粒用于重组蛋白的表达。共表达产物采用SDS-PAGE、Westernblotting、反向IHA、ELISA和透视电镜观察进行分析鉴定。结果:共表达产物的分子量约50kDa,存在于宿主菌体表面的纤毛中,GST抗血清和K99抗血清均可识别共表达产物,提示共表达产物既有GST表位,又有K99抗原表位。结论:日本血吸虫26kDaGST和产毒大肠杆菌K99基因共表达获得成功。

关键词: 日本血吸虫, 谷胱甘肽-S-转移酶, 纤毛抗原, 基因表达

Abstract:  AIM: To study the association expression of two genes encoding GST of Schistosoma japonicum and K99 of enterotoxigenic Escherichia coli. METHODS: PCR technique was used to gain the K99 gene. After digestion with BamHⅠ and EcoRⅠ, the gene was cloned into the plasmid vector pUC18 by using recombinant DNA techniques. The other target gene of GST in pSj5 plasmid was obtained by EcoRⅠ digestion, and was then ligated into the recombinant plasmid pUC18 K99. The expressed product was assayed by SDS PAGE, Western blotting, reversal IHA, ELISA and transmission electron microscopy. RESULTS: Co expression product of around 50 kDa was obtained. The protein was recognized by anti GST and anti K99 antibodies (ELISA and IHA), and acted as pilus on the surface of transformed DH5α E.coli bacteria. CONCLUSION: Co expression of the genes encoding GST and K99 was successfully achieved.

Key words: Schistosoma japonicum, GST, K99 pili antigens, gene expression