›› 2005, Vol. 48 ›› Issue (1): 13-17.

• 研究论文 • 上一篇    下一篇

美洲大蠊变应原Cr PI的表达、纯化与免疫学特性鉴定

高波1, 刘志刚1,2*, 邢苗1,2, 徐宏2, 罗时文2, 赖仞2   

  • 出版日期:2005-03-20 发布日期:2005-02-20

Expression, purification and characterization of the American cockroach Cr PI allergen

GAO Bo1,LIU Zhi-Gang1,2*,XING Miao1,2,XU Hong2, LUO Shi-Wen2, LAI Ren2   

  • Online:2005-03-20 Published:2005-02-20
  • Contact: LIU ZhiGang

摘要: 以阳性噬菌体克隆为模板,通过PCR扩增出目的基因片段并克隆入T载体,经测序证实为美洲大 蠊Periplaneta americana变应原Cr PI后,将该基因亚克隆入表达载体pGEX-5X-1。美洲 大蠊变应原Cr PI在大肠杆菌中得到高效表达,但主要以包涵体形式存在于沉淀中。目的蛋白溶 于6 mol/L盐酸胍并经稀释复性后,经Glutathione SepharoseTM4B亲和层析,纯度达 90%以上。以蟑螂过敏病人血清进行免疫印迹检测,结果显示重组变应原具有良好的IgE结合活 性。

关键词: 美洲大蠊, 重组变应原Cr PI, 蛋白表达, 亲和层析, 免疫印迹

Abstract: Using the Cr PI clone from the λEXcell library as a template, the cDNA fragments were first generated by PCR techniques and then ligated into T vector. After being confirmed by DNA sequencing, the cDNA encoding the American cockroach Cr PI allergen was subcloned into pGEX-5X-1 and expressed as GSTfusion protein in the form of inclusion bodies. After being dissolved in 6 mol/L guanidine hydrochloride and renatured with a simple dilution method, the proteins of target were purified to above 90% purity by affinity chromatography with Glutathione Sepharose 4B. Tested with sera from subjects allergic to cockroach, the recombinant allergen was shown to possess good IgEbinding activity as determined by Western blotting.

Key words: American cockroach, Periplaneta americana, recombinant allergen Cr PI, protein expression, affinity chromatography, Western blotting