中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (5): 9-287.

• 论著 • 上一篇    下一篇

恶性疟原虫cDNA克隆(CO111)的序列测定和分析

王燕妮;黄燕;李明;孙万邦;谢毅;李英杰
  

  1. 1 遵义医学院免疫学教研室 遵义 5630032 复旦大学遗传工程国家重点实验室 上海 2004333 第一军医大学热带医学研究所 广州 510515
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-10-30 发布日期:1999-10-30

SEQUENCING AND ANALYSIS OF A cDNA CLONE CO111 OF PLASMODIUM FALCIPARUM 

WANG Yanni 1;HUANG Yan 2;LI Ming 3;SUN Wanbang 1;XIE Yi 2;LI Yingjie 3
  

  1. 1 Department of Immunology;Zunyi Medical College;Zunyi 563003 2 State Key Laboratory of Genetic Engineering;Institute of Genetics;Fudan University;Shanghai 200433 3Department of Malaria Immunology,The First M ilitary Medical University, Guang zhou 510515
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-10-30 Published:1999-10-30

摘要:   目的: 测定和分析cDNA 克隆(CO111)与抗恶性疟原虫兔血清和1株单克隆抗体呈阳性反应的序列。方法:采用PCR扩增CO111 克隆的cDNA 片段,纯化后经Klenow 酶补平,与M13m p18 载体连接,转化到大肠杆菌(E.coli) JM109。PCR筛选和鉴定M13单链,PEABI373ADNA自动测序仪测序,PC/GENE和GenBank (EM-BL)等软件进行序列分析和比较。结果:CO111 cDNA克隆含有233对核苷酸对。与GenBank 数据库中恶性疟原虫DNA比较,未发现与该cDNA相同的序列。结论:分离出1 个新的与抗恶性疟原虫抗体呈阳性反应的抗原cDNA克隆

关键词: 恶性疟原虫, CO111, 抗原, 亲水性, 易曲性

Abstract:  AIM: To sequence and analyse a cDNA clone CO111 , reacting with immune sera obtained from rabbits immunized with Plasmodium falciparum and one McAb against P falciparum. METHODS: cDNA clone was amplified by PCR. The PCR product was purified and polished with Klenow enzyme and ligated into the M13mp18 vector (digestd by SamI) and then transformed into E coli JM109. The positive recombinant was screened out by PCR and sequenced by the PRISM Dye Primer Sequencing Kit(ABI).The sequence was analyzed by the program from Geneva University and was compared by GenBank of EMBL. RESULTS: The nucleotide sequence of this cDNA clone contains an open reading frame of 233 bp, which encodes a predicted polypeptide of 77 amino acid residues. The ratio between A+T and G+C is 3.16. The polypeptide is highly hydrophilic and flexible. Comparison among cDNA of P falciparum from GenBank of EMBL showed that no sequence identical to this cDNA was found. CONCLUSION: A novel cDNA clone reacted with the antibodies against P falciparum was isolated.

Key words: Plasmodium falciparum, CO111, antigen, hydrophilicity, flexibility