中国寄生虫学与寄生虫病杂志 ›› 2003, Vol. 21 ›› Issue (2): 11-101.

• 论著 • 上一篇    下一篇

恶性疟原虫融合蛋白PfCP-2.9自由巯基的测定

钱锋,潘卫庆
  

  1. 第二军医大学病原生物学教研室,上海 200433
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-04-30 发布日期:2003-04-30

Determination of Free Thiols in the Chimeric Protein PfCP-2.9 of Plasmodium faldparum

QIAN Feng,PAN Wei-qing
  

  1. Department of Etiological Biology,Second Military Medical University,Shanghai 200433
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-04-30 Published:2003-04-30

摘要:   目的 检测由毕氏酵母表达的恶性疟原虫融合蛋白(Plasmodiumfalciparumchimericprotein)PfCP-2.9的自由巯基。方法使用反向高压液相层析和Ellman氏反应进行检测。用反向高压液相,检测了3种样本,PfCP-2.9、PfCP-2.9经二硫苏糖醇还原、PfCP-2.9经吲哚乙酸烷基化。结果两种检测方法均表明PfCP-2.9不含任何自由流基。结论由毕氏酵母表达的PfCP-2.9中的半胱氨酸残基所含有的硫基均已氧化形成二硫键。

关键词: 恶性疟原虫, 融合蛋白, 反向高压液相, Ellman氏反应, 自由巯基

Abstract:  Objective To determine the free thiols in the chimeric protein PfCP-2. 9 of Plasmodium falciparum expressed by Pichia pastoris. Methods Two experiments of reverse phase HPLC and Ellman' s reaction were applied to the PfCP-2.9 for the determination of its free thiols. For RP-HPLC analysis, three kinds of samples were tested: PfCP-2. 9, dithiothreitol-reduced PfCP-2.9 and indoacetic acid-alkylated PfCP-2.9. Results Both experiments showed that there were no any free thiols present in the PfCP-2. 9. Conclution The disulfide bonds between cysteine residues of PfCP-2. 9 were formed completely.

Key words: Plasmodium falciparum, chimeric protein, reverse phase HPLC, Ellman' reaction, free thiol