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张瑞芬, 庄辉, 蒋志彬, 王薇媛, 张正, 杜珩, 刘学恩, 董庆鸣, 王小红. 梅毒密螺旋体Tp47重组蛋白的表达及其应用[J]. 中国公共卫生, 2003, 19(2): 145-146.
引用本文: 张瑞芬, 庄辉, 蒋志彬, 王薇媛, 张正, 杜珩, 刘学恩, 董庆鸣, 王小红. 梅毒密螺旋体Tp47重组蛋白的表达及其应用[J]. 中国公共卫生, 2003, 19(2): 145-146.
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ZHANG Rui-fen, ZHUANG Hui, JIANG Zhi-bin, . Expression of 47 kDa recombinant protein of treponema pallidum and its potential use in serodiagnosis of syphilis[J]. Chinese Journal of Public Health, 2003, 19(2): 145-146.
Citation: ZHANG Rui-fen, ZHUANG Hui, JIANG Zhi-bin, . Expression of 47 kDa recombinant protein of treponema pallidum and its potential use in serodiagnosis of syphilis[J]. Chinese Journal of Public Health, 2003, 19(2): 145-146.
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梅毒密螺旋体Tp47重组蛋白的表达及其应用

Expression of 47 kDa recombinant protein of treponema pallidum and its potential use in serodiagnosis of syphilis

    摘要
  • 摘要:
      目的   在大肠埃希菌中表达梅毒密螺旋体(Treponema pallidum, Tp)Tp47重组蛋白, 用其建立诊断梅毒的酶联免疫法(enzyme immunoassay, EIA)。
      方法   应用聚合酶链反应法(PCR)从Tp全基因组中扩增目的片段Tp47, 并将其克隆到表达载体pET-30a中, 构建重组质粒pET-30a-Tp47。在大肠埃希菌中表达重组蛋白Tp47, 亲和层析柱纯化, 建立EIA法, 检测血清中抗-Tp抗体。
      结果   获得了Tp47基因重组蛋白的高效表达, 该重组蛋白存在于细菌上清中, 占全菌体蛋白12%左右, 分子量约39kDa。蛋白印迹法(westernblot, WB)显示, Tp47重组蛋白具有良好的抗原性.用Tp47重组蛋白建立EIA法, 检测11份梅毒血凝试验阳性和28份阴性血清, 灵敏度为100%(11/11), 特异性为96.4%(27/28)。
      结论   Tp47重组蛋白EIA可用于梅毒的诊断。

     

    Abstract:
      Objective   To express the recombinant Tp47 protein of Treponema pallidum(TP)in E.Coli, and to developenzyme immunoassay(EIA)for serological diagnosis of syphilis.
      Methods   The target gene Tp47 was amplified from the Tp complete genome by polymer ase chain reaction(PCR).The PCR products were cloned into the expression vector pET-30a to generate recombinant plasmid pET-30a-Tp47.The recombinant Tp47 protein was expressed in E.Coli, and purified with affinity chr omatog raphy columns.Then it was used for the development of EIA.
      Results   T he recombinant T p47 protein with the molecular weight of 39kDa was expressed in the supernatant of E.coli and contained about 12% of the total cellular protein.The antigenicity of the precombinant T p47 protein was confir med by both western immunoblot and EIA.11 THHA(Treponema pallidum hemag glutination assay)positive and 28 negative sera were tested by the EIA, with the sensitivity of 100% (11/11)and the specificity of 96.4% (27/28).
      Conclusion   The recombinant T p47 protein can be used for development of EIA for serological diagnosis of syphilis.

     

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