口蹄疫病毒WFL株基因组全长cDNA的克隆及序列分析  

Construction of the genomic full-length cDNA of foot-and-mouth disease virus WFL strain

作　　者：任林柱[1] 王兴龙[2] 李莉[1] 李晓艳[2] 段小宇[1] 梅英武[1] 刘锴[1] 王学理[1] 

机构地区：[1]吉林大学畜牧兽医学院,吉林长春130062 [2]中国人民解放军军事医学科学院军事兽医研究所,吉林长春130062

出　　处：《中国预防兽医学报》2007年第1期22-26,共5页Chinese Journal of Preventive Veterinary Medicine

基　　金：军事医学科学院科技创新基金资助项目;吉林省科技厅科技发展计划项目(20050549)

摘　　要：根据口蹄疫病毒基因组的结构特点以及GenBank上公布的全序列,用DNAMAN分别设计了涵盖整个基因组序列的3对引物,从接种口蹄疫病毒WFL株的细胞培养液中提取了病毒基因组RNA,采用RT-PCR方法和RACE法分别扩增了3条基因片段,并将扩增片段分别与T载体连接,在体外分别进行了5'半分子和3'半分子的构建。最后将5'半分子和3'半分子连接成基因组全长cDNA分子。经PCR鉴定、酶切鉴定及全长cDNA测序,证实成功构建了口蹄疫病毒WFL株基因组全长cDNA分子。序列分析结果表明,供试口蹄疫病毒基因组全长为8155nt,5'UTR长1059nt;具有一个大的读码框,其核苷酸长度为6969nt,包括201aa的前导蛋白基因和2122aa的聚合蛋白基因;3'UTR长127nt,包括34nt的poly(A)。In order to establish a reverse genetic system of foot-and-mouth disease virus（FMDV）, the full-length cDNA of FMDV WFL strain was constructed. Using the DNAMAN, three pairs of over-lapping primers, which cover the whole genome of FMDV WFL strain, were designed according to the nucleotide sequence reported. The total RNA extracted, three over-lapping fragments were amplified by the RT-PCR or the RACE method, and cloned into T-vector, respectively. The three fxagments were ligated into full-length cDNA molecule of WFL strain in vitro. It was showed that the full-length cDNA molecule of FMDV WFL strain has been constructed successfully, which was proved by PCR, restriction analysis and sequencing. The result of sequence analysis showed that the full-length cDNA of WFL strain was 8 155 nt, including l 059 nt of the 5＇UTR, 6 969 nt of the ORF and 127 nt of the 3＇UTR.

关 键 词：口蹄疫病毒 基因组 全长CDNA 

分 类 号：S852.65[农业科学—基础兽医学] Q78[农业科学—兽医学]