羊布鲁氏菌omp25基因原核表达载体的构建与鉴定 |
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引用本文: | 石艳春,韩堃,郑源强,吴岩,毕力夫.羊布鲁氏菌omp25基因原核表达载体的构建与鉴定[J].内蒙古医学院学报,2012,34(2):89-93. |
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作者姓名: | 石艳春 韩堃 郑源强 吴岩 毕力夫 |
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作者单位: | 1. 内蒙古医学院基础医学院,内蒙古呼和浩特,010059 2. 天津医科大学基础医学研究中心 |
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基金项目: | 教育部“春晖计划”项目,内蒙古自然科学基金,内蒙古自治区科技计划项目,内蒙古自治区人才开发基金 |
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摘 要: | 目的:利用PCR反应从羊布鲁氏菌基因组DNA中克隆omp25基因,并将其构建到原核表达载体pET-32a中。方法:试剂盒法提取羊布鲁氏菌基因组DNA,设计合适的引物,通过PCR反应从基因组中扩增外膜蛋白OMP25的编码基因(omp25)。将得到的基因片段连接到克隆载体pMD19-T的多克隆位点(MCS)中,将连接体pMD19-T-omp25转化感受态大肠杆菌DH5(并进行筛选和克隆扩增,提取质粒并进行酶切分析与序列测定。利用酶切与连接反应将目的基因(omp25)插入载体pET-32a的多克隆位点中,将连接体pET-32a-omp25转化感受态大肠杆菌DH5(并进行筛选和克隆扩增,提取质粒并进行酶切分析。结果:PCR扩增得到的基因片段与GenBank中已公布的羊布鲁氏菌omp25基因同源性为99%。酶切分析结果表明,omp25基因成功地插入载体pET-32a中。结论:成功地扩增得到了羊布鲁氏菌omp25基因并构建了携带该基因的重组原核表达载体pET-32a-omp25,为后续的研究提供了可靠的基础。
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关 键 词: | 羊布鲁氏菌 omp25 原核表达载体 克隆 鉴定 |
CONSTRUCTION OF OMP25 GENE IN PROKARYOTIC EXPRESSION VECTOR FROM B. MELITENSIS |
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Affiliation: | SHI Yan-chun,HAN Kun,ZHENG Yuan-qiang,et al.(School of Basic Medical Science,Inner Mongolia Medical College,Hohhot 010059 China) |
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Abstract: | Objective: To explore the function of outer membrane protein OMP25 in Brucella melitensis M5 strain,a prokaryotic expression vector containing omp25 was constructed.Methods: The genome DNA of B.melitensis was isolated with commercial available kit.The PCR product containing omp25 gene was inserted into vector pMD19-T.The recombinant plasmids pMD19-T-omp25 was transformed into competent E.coli DH5α.Then the omp25 gene fragment was cut out and cloned into the prokaryotic vector pET-32a which was transformed into E.coli DH5α.Results: An expected gene fragment was isolated from the bacterial genome by PCR amplification and confirmed with sequencing.Conclusions: The recombinant expression plasmid pET-32a-omp25 was correctly constructed,which could provide the materials for OMP25 function analysis. |
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Keywords: | Brucella melitensis omp25 gene Prokaryotic vector Clone Identification |
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