恶性疟原虫TRAP/CSP融合抗原的构建及表达

Chinese Journal of Parasitology and Parasitic Diseases(2002)

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Abstract
目的构建恶性疟原虫红前期融合蛋白4(PfCP-4).方法通过甘氨酸-脯氨酸-甘氨酸(GPG)接点将恶性疟原虫3D7株血凝素相关匿名蛋白(TRAP)膜外区序列(氨基酸26~330)和环子孢子蛋白(CSP)19个4肽重复区及其羧基末端序列(氨基酸199~383)连接,采用不对称PCR法人工合成1 577 bp PfCP-4基因.将PfCP-4基因克隆在pQE表达质粒上,转化大肠杆菌SG13009后进行诱导表达,用抗CSP的免疫血清进行免疫印迹检测.结果免疫印迹检测显示在57kDa处出现特异的表达条带,其大小与推算的PfCP-4分子量一致,表明PfCP-4合成基因能在大肠杆菌中表达分子量为57kDa的PfCP4重组蛋白.结论成功构建了PfCP-4.
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Key words
plasmodium falciparum,trap/csp chimeric protein
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