首都医科大学学报 ›› 2000, Vol. 21 ›› Issue (4): 277-280.

• 论著 • 上一篇    下一篇

人酪氨酸羟化酶全长及催化核心序列的克隆与表达

熊英1, 刘华1, 于培兰1, 张澄波1, 杨慧2, 徐群渊2   

  1. 1. 首都医科大学生化教研室;2. 北京市神经科学研究所
  • 收稿日期:2000-05-17 修回日期:1900-01-01 出版日期:2000-10-15 发布日期:2000-10-15

Clonging and Expression for DNA Fragment of Complete Sequence and Catalytic Domain of Human Tyrosine Hydroxylase

Xiong Ying1, Liu Hua1, Yu Peilan1, Zhang Chengbo1, Yang Hui2, Xu Qunyuan2   

  1. 1. Department of Biochem, Capital University of Medical Sciences;2. Beijing Institute for Neuroscience
  • Received:2000-05-17 Revised:1900-01-01 Online:2000-10-15 Published:2000-10-15

摘要: 设计合成含适当酶切位点的PCR引物,以人的全长THcDNA为模板,进行PCR扩增反应,得到人酪氨酸羟化酶(tyrosinehydroxylase,TH)全长及催化核心序列,将其分别插入谷胱甘肽巯基转移酶(GST)融合表达载体pGEX-4T-1,转化入大肠杆菌BL21,以IPTG诱导表达,SDSPAGE、westernblotting分析表达产物。结果获得了编码N-端缺失145个氨基酸的酪氨酸羟化酶催化结构域的cDNA片段及带一定内切酶识别位点的全长片段,表达载体构建正确。插入片段序列与人THmRNA相应序列完全一致。转入重组质粒的菌经诱导后,有相对分子质量约为8.3万及6.6万的外源融合蛋白表达,并得到较纯的酶蛋白.

关键词: 酪氨酸羟化酶, 表达, 催化核心, 全长序列

Abstract: In order to obtain complete sequence and catalytic core of human tyrosine hydroxylase(TH) cDNA,the full length of cDNA from human TH was used as template and the specific oligonucleotide primers were designed for PCR.The target fragments were cloned into vector pGEX-4T-1 respectively.The recombinant plasmids were transferred into E.coli BL21,and the expression of target protein was induced with IPTG.The expressed protein was analysed by SDS-PAGE and western-blotting.The result showed that the cDNA fragments of complete sequence and catalytic core of human TH were harvested.The sequencing for them showed that the cloned target gene fragments were correct.SDS-PAGE indicated that the proteins with Mr about 83000 and 66000 were expressed with the recombinant plamids pGEXTHa and pGEXTHc respectively.

Key words: tyrosine hydroxylase, expression, catalytic core, complete seque

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