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山东大学学报(医学版) ›› 2009, Vol. 47 ›› Issue (7): 32-36.

• 论文 • 上一篇    下一篇

NT4TAT6×HisVHLβ结构域肾癌抑制融合肽cDNA克隆的构建

陈杰 1,刘庆勇2,阮喜云3,张士宝1,张建军2,李宗武2,杨广笑4,王全颖4   

  1. 1. 山东大学临床医学院, 济南 250012; 2. 山东大学附属济南市中心医院泌尿外科, 济南 250013;
    3. 山东大学附属济南市中心医院神经内科, 济南 250013; 4. 西安华广生物工程公司, 西安 710025
  • 收稿日期:2009-03-06 发布日期:2009-07-16
  • 通讯作者: 刘庆勇(1962- ),男,副教授,主任医师,主要从事泌尿系肿瘤及肾脏移植研究。 Email:lqylbc@163.com
  • 作者简介:陈杰(1981- ),男,硕士研究生,主要从事泌尿系肿瘤方面研究。Email:drcj@yahoo.cn
  • 基金资助:

    山东省自然科学基金资助课题(Y2006C04)。

Construction and identification of recombinant plasmid expressing NT4TAT6×HisVHLβ fusion peptide

CHEN Jie 1, LIU Qingyong 2, RUAN Xiyun 3, ZHANG Shibao 1, ZHANG Jianjun 2,  LI Zongwu 2, YANG Guangxiao 4, WANG Quanying 4   

  1. 1. School of Clinical Medicine, Shandong University, Jinan 250012, China;
    2. Department of Urology, Jinan Central Hospital Affiliated to Shandong University, Jinan 250013, China;
    3. Department of Neurology, Jinan Central Hospital Affiliated to Shandong University, Jinan 250013, China;
    4. Xi′an Huaguang Biological Engineering Co.Ltd, Xi′an 710025, China
  • Received:2009-03-06 Published:2009-07-16

摘要:

目的构建VHL蛋白(von HippelLindau protein, pVHL)β结构域肾癌抑制融合肽cDNA,并将其应用于肾癌的微基因治疗。方法分别设计合成pVHLβ结构域104123短肽cDNA的正向和反向引物以及编码TAT6×His cDNA的正、反向引物,使用互为引物模板PCR方法,扩增获得具有NaeI/Eco72I酶识别位点的TAT6×His cDNA片段和具有Eco72I/BamH I酶识别位点的VHLβ抑制肽cDNA片段,将两个片段分别克隆到pGEMT easy中,使用双脱氧终止法测序,通过DNASIS软件分析同数据库资料一致性和编码的氨基酸序列。用Nae I和BamH I双酶切获取的TAT6×HisVHLβcDNA片段插入到具有NT4信号肽的pBV220载体中,构建了pBV220NT4TAT6×HisVHLβ质粒。结果经DNA测序证实,获得了编码TAT6×His cDNA片段和编码VHLβ抑制肽的cDNA片段,分析证实核酸序列和推导的氨基酸同数据库资料一致。重组质粒pBV220NT4TAT6×HisVHLβ酶切图谱证实已将NT4TAT6×HisVHLβ融合肽cDNA克隆到pBV220原核表达载体中。结论成功扩增了编码TAT膜渗透肽和6×His标签肽以及VHL抑癌基因β结构域肾癌抑制肽的cDNA片段,构建了具有NT4信号肽的TAT6×HisVHLβ融合肽cDNA。

关键词: VHLβ结构域肾癌抑制肽;融合肽;微基因;肾肿瘤

Abstract:

The specific amino acid sequence(104123) in βdomain of pVHL is sufficient to inhibit the growth and invasion of renal cell carcinoma(RCC). To express this peptide for a gene therapy of RCC by using minigene, we constructed and identified the recombinant plasmid expression box, including NT4 signal peptide, tag and cell penetrating peptides. MethodsBy means of asymmetrical primer/template, fragments encoding βdomain of pVHL(the VHL gene product) and TAT6×His were gained, which included Nae I/Eco72I and Eco72I/BamH I restriction enzyme sites. Then the fragments were cloned into vector pGEMT easy. The positive clone was identified by restriction enzymes, and then the cloned amplified fragments were sequenced by a dideoxymediated chaintermination method. The cloned TAT6×HisVHLβ cDNA was compared with the GeneBank sequence by DNASIS. After being digested by Nae I and BamH I, the TAT6×HisVHLβ cDNA fragment was cloned into recombinant vector pBV220NT4, which was also digested by Nae I and BamH I. The constructed recombinant plasmid pBV220NT4TAT6×HisVHLβ was obtained. ResultsThe sequences of TAT6×His and VHLβ cDNA artificially synthesized and analyzed by digestion were consistent with the published results. After analyzing ORF of the cloned TAT6×HisVHLβ cDNA by DNASIS, we found that amino acids encoded by the cloned TAT6×HisVHLβ cDNA were also identical to the published results. ConclusionThe recombinant plasmid expressing TAT cell penetrating peptides and βdomain of pVHL was constructed. Then prokaryotic expressive vector pBV220NT4TAT6×HisVHLβ was constructed by a routine molecular biological method. These results lay a foundation for further research of fusion gene to treat RCC.

Key words:  VHLβdomain RCC supressor peptide; Fusion peptide; Minigene; Kidney neoplasms

中图分类号: 

  • R737.11
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