中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (6): 12-366.

• 论著 • 上一篇    下一篇

恶性疟原虫FCC1/HN株新抗原表达序列标记位(ESTs)的获得

阎宗合1;谢毅2;李明1;王萍1;王燕妮1;毕惠祥1;李英杰1
  

  1. 第一军医大学热带医学研究所热带病研究室,广州 510515;复旦大学遗传工程国家重点实验室,上海 200433
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-12-30 发布日期:1999-12-30

FINDING OF NEW FCC1/HN ANTIGENIC EXPRESSED SEQUENCE TAG(ESTs) OF PLASMODIUM FALCIPARUM

YAN Zhonghe1;XIE Yi2;LI Ming1;WANG Ping1;WANG Yanni1;BI Huixiang1;LI Yingjie1   

  1. 1 Department of Tropical Diseases;Institute of Tropical Medicine;The First Military Medical University;Guangzhou;510515 2 State Key Laboratory of Genetic Engineering,Fudan University,Shanghai,200433
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-12-30 Published:1999-12-30

摘要:   目的: 以筛选恶性疟原虫FCC1/HN 株λgt11 cDNA 表达文库所获得的强阳性克隆作基础, 对上述强阳性克隆的cDNA 插入片段进行DNA 序列测定, 阐明相对应的新表达序列标签 (ESTs), 作为发现新抗原基因的线索。方法:以cDNA 表达文库接头的较长链作PCR引物、扩增cDNA 插入片段,将扩增产物克隆入M13 m p18测序载体, 进行部分DNA 序列测定、编辑, 将之在GenBank 中进行DNA 序列同源性搜索比较和分析。结果: 获得1 个C03 序列为已知恶性疟原虫热休克蛋白70-2 基因片段, 发现5 个新的具有抗原意义的恶性疟原虫表达序列标记位 (ESTs)。结论: 这5 个新的恶性疟原虫表达序列标记位为发现新的恶性疟原虫抗原基因奠定了基础。

关键词: 恶性疟原虫, 抗原, cDNA, 表达序列标记位

Abstract:  AIM: To sequence the strong positive clones obtained by immuno-screening of Plasmodium falciparum FCC1/HN λgt11 cDNA expression library, and to elucidate the antigenic expressed sequence tags through sequencing the cDNA insert of these positive clones, and new antigenic ESTs could serve as a resource to pursue their corresponding antigen genes. METHODS: cDNA inserts of positive λgt11 phage clones were amplified by PCR. The PCR products, after purification, were cloned into the M13 mp18 sequencing vector. Single-stranded M13 DNA was prepared and sequenced. Then the acquired sequences were compared in homologies with EMBL/GenBank database on the PC/GENE software system and searched in NCBI (National Center for Biotechnology Information) GenBank using BLAST (Basic Local Alignment Search Tool) commond. RESULTS: Sequence C03 was part of the known P.falciparum antigenic heat shock protein 70 (Pfhsp70) gene, while the other 5 sequences were new P.falciparum antigenic expressed sequence tags (ESTs). CONCLUSION: The 5 new antigenic ESTs generated could serve as the breaking through points in our efforts to find out new P.falciparum antigen genes.

Key words: Plasmodium falciparum, antigen, cDNA, expressed sequence tags