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胸膜肺炎放线杆菌 APXⅡA 基因的克隆及序列测定

赵卫平1,2, 逯忠新2, 陈振文1, 杨学山2, 赵 萍2, 高鹏程2, 储岳峰2

(1. 军事医学科学院 实验动物中心, 北京 100071;
2. 中国农业科学院 兰州兽医研究所, 甘肃 兰州 730046)

摘要: 用PCR法从胸膜肺炎放线杆菌(APP)7型的DNA提取物中扩增出大小为2873bp的APXⅡA基因片段;将PCR产物重组到质粒载体pMD18T中,并对重组质粒进行酶切分析及序列测定。结果表明,克隆片段为完整的目的基因,该片段的核苷酸序列与国外分离株M30602的同源性达99.7%。

关键词: 胸膜肺炎放线杆菌; 基因克隆; 序列测定

中图分类号:S 852.619  文献标识码:文章编号:1000-6419(2004)05-0013-03

Cloning and sequencing of APXⅡA gene of 〖WTHX〗Actinobacillus pleuropneumoniae

ZHAO Weiping1, LU Zhongxin2, CHEN Zhenwen1, 
YANG Xueshan2, ZHAO Ping2, GAO Pengcheng2, CHU Yuefeng2
(1. Center for Laboratory Animals, PLA Academy of Military Medical Sciences,Beijing 100071,China; 
2. Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences,Lanzhou 730046,China) 

Abstract: The APXⅡA gene of 2873bp, which was amplified from Actinobacillus pleuropneumoniae (APP) serotype 7 by PCR, was cloned into the plasmid vector pMD18T to construct the recombinantplasmid. The constructed recombinant plasmid was analyzedby restriction enzyme digestion and sequence analysis. The result showed that the cloned gene from APP serotype 7 by us is the fulllength target gene and shares 99.7% homology with that from the APP foreign isolate strain M30602.

Key words:Actinobacillus pleuropneumoniae ; gene cloning; sequencing

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