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牛朊蛋白27-30基因的克隆与表达
引用本文:路伟,张鹏,张杰,刘永生,卫广森,陈豪泰,姜海霞,朱小玲.牛朊蛋白27-30基因的克隆与表达[J].中国预防兽医学报,2007,29(4):277-281.
作者姓名:路伟  张鹏  张杰  刘永生  卫广森  陈豪泰  姜海霞  朱小玲
作者单位:1. 中国农业科学院兰州兽医研究所,家畜疫病病原生物学国家重点实验室/农业部畜禽病毒学重点开放实验室,甘肃,兰州,730046;沈阳农业大学,辽宁,沈阳,110161
2. 辽宁省动物疫病预防控制中心,辽宁,沈阳,110161
3. 中国农业科学院兰州兽医研究所,家畜疫病病原生物学国家重点实验室/农业部畜禽病毒学重点开放实验室,甘肃,兰州,730046
4. 甘肃农业大学,动物医学院,甘肃,兰州,730070
基金项目:甘肃省科技攻关项目;甘肃省自然科学基金;中国博士后科学基金
摘    要:利用PCR技术,从含有牛朊蛋白(Prion protein,PrP)基因Prnp的开放阅读框的克隆质粒BoPrnp—T中扩增出约420bp的目的基因(PrP猢基因)。将PrP^27-30基因和载体pPIC9K分别用限制性核酸内切酶EcoRⅠ和NotⅠ进行双酶切,T4DNA连接酶作用后,转化至E.coli JM109中,构建重组表达载体pPIC9K-boPrP^27-30。pPIC9K-boPrP^27-30经限制性核酸内切酶SalⅠ线性化后电转至毕赤酵母GS115中,经G418筛选后得到高拷贝的重组菌株GS115/pPIC9K-boPrP^27-30。GS115/pPIC9K-boPrP^27-30经1.0%甲醇诱导后,表达产物用SDS-PAGE和Western blot分析,结果表明牛PrP^27-30基因在毕赤酵母细胞中获得表达,表达产物的分子量约为27Ku,能够被单克隆抗体SAF-70识别。

关 键 词:牛PrP27-30基因  克隆  表达
文章编号:1008-0589(2007)04-0277-04
收稿时间:2006-06-20
修稿时间:2006年6月20日

Cloning and expression of bovine prion protein 27-30 gene
LU Wei,ZHANG Peng,ZHANG Jie,LIU Yong-sheng,WEI Guang-sen,CHEN Hao-tai,JIANG Hai-xia,ZHU Xiao-ling.Cloning and expression of bovine prion protein 27-30 gene[J].Chinese Journal of Preventive Veterinary Medicine,2007,29(4):277-281.
Authors:LU Wei  ZHANG Peng  ZHANG Jie  LIU Yong-sheng  WEI Guang-sen  CHEN Hao-tai  JIANG Hai-xia  ZHU Xiao-ling
Abstract:A 420 bp PrP^27-30 gene fragment of the bovine Prop gene was amplified by PCR from plasmid BoPmp-T containing the ORF of bovine Prop gene. The PCR product was cloned into pPIC9K vector to produce recombinant plasmid pPIC9K-boPrP^27-30 and transformed into E.coli JMI09. The pPIC9K-boPrP^27-30 was linearized with Sal I and then transfected into Pichia Pastoris GS115 by electroporation. A recombinant sWain GS115/pPIC9K-boPrP^27-30 was obtained by G418 selection. Expression of the recombinant PrP was induced with 1.0 % methanol and the expression products were identified by SDS-PAGE and Western blot analysis. The results demonstrated that bovine PrP^27-30 gene was successfully expressed in Pichia Pastoris as a 27 Ku protein that could be specifically recognized by monoclonal antibody SAF-70.
Keywords:bovine PrP^27-30 gene  cloning  expression
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