›› 2007, Vol. 34 ›› Issue (10): 49-52.

• 生物技术 • 上一篇    下一篇

广西巴马小型猪卵泡抑素的克隆及原核表达

莫毅1,郭亚芬1,梁方方2,兰干球1,蒋和生1,李柏1   

  1. 1.广西大学动物科学技术学院,南宁 530004;2.广西畜牧研究所,南宁 530001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-20

Cloning and Prokaryotic Expression of Follistatin Gene fromthe Guangxi Bama Mini-pig

MO Yi1,GUO Yafen1,LIANG Fangfang2,LAN Ganqiu
1,JIANG Hesheng1,LI Bai1
  

  1. 1.College of Animal Science and Technology,Guangxi University,Nanning 530004,China; 2.Guangxi Institute of Animal Science, Nanning 530001,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-20

摘要: 从广西大学巴马小型猪卵巢中提取总RNA,并以其为模板,应用逆转录-聚合酶链式反
应(RT-PCR),在合成的特异性引物引导下,扩增获得广西巴马小型猪卵泡抑素(follist
atin)cDNA的全序列,长度为1035 bp。将PCR产物克隆到pMD18-T载体后进行序列测定及分析,结果表明:广西巴马小型猪卵泡抑素cDNA序列与GenBank中已报道的家猪卵泡抑素同源性高达99.4%。同时,将目的基因插入到原核表达载体pET 32a+多克隆位点中,构建了follistatin的原核表达载体,并转化于大肠杆菌BL21。转化菌经异丙基硫代半乳糖苷(IPTG)诱导,变性聚丙烯酰胺凝胶电泳(SDS-PAGE)和蛋白质免疫印迹(Western blotting)分析,结果表明:试验已成功表达了follistatin的融合蛋白(约58.4 ku)。

关键词: 广西巴马小型猪; 卵泡抑素; 克隆; 原核表达

Abstract: In this study, the total RNA was isolated from Guangxi Bama mini-pig
ovary tissue with RNAwatson extraction. The complementary DNA (cDNA) encoding follistatin protein was ampilified by the reverse transcription polymerase chain reaction (RT-PCR) method and a pair of differential primers. The amplified cDNA fragment was inserted into pMD18-T vector. The recombined vectors were verified through the sequence survey. The results showed that the cloned follistatin cDNA was highly homologous with the reported nucleotide encoding swine follistatin in GenBank(99.4%). Meanwhile, the identified follistatin cDNA was inserted in the multiple cloning sites of plasmid pET 32a+ to construct prokaryotic expression vector, the latter was transformed into the E coli BL21 induced by IPTG. Then a fusion protein was obtained (about 58.4 ku) in SDSPAGE and Western blotting.These results showed that the follistatin cDNA was expressed in prokaryotic cells.

Key words: Guangxi Bama mini-pig; follistatin; cloning; prokaryotic expression

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