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植物研究 ›› 2008, Vol. 28 ›› Issue (3): 310-314.doi: 10.7525/j.issn.1673-5102.2008.03.014

• 论文 • 上一篇    下一篇

TMV复制酶基因靶向的RNA干涉载体构建

律凤霞1,3;郭兆奎1,2;颜培强2;万秀清2;潘永明3   

  1. (1.黑龙江八一农垦大学植物科技学院,大庆 163000) (2.黑龙江省烟草科学研究所,牡丹江 157011) (3.牡丹江师范学院生物系,牡丹江 157012)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-05-20 发布日期:2008-05-20
  • 基金资助:
     

Construction of TMV-replicase Gene-targeted Vectoer for RNA Interference

LÜFeng-Xia;GUO Zhao-Kui;YAN Pei-Qiang;WAN Xiu-Qing;PAN Yong-Ming   

  1. (1.Heilongjiang August First Land reclamation university,Daqing 163000) (2.Heilongjiang Tobacco Research Institute,Mudanjiang 157011) (3.Mudanjiang Normal university College,Mudanjiang 157012)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-05-20 Published:2008-05-20
  • Supported by:
     

摘要: 以TMV复制酶基因作为RNAi的靶向序列,应用RT-PCR法获得目的DNA序列。依据RNAi机制,以酶切后连接的方法将目的DNA序列正向、反向锚定连接到pUCCRNAi载体质粒,构建含目的序列反向重复结构的RNA干涉中间载体;反向重复结构酶切后插入含超强启动子的pC2300-35s-OCS表达载体,重组的表达载体质粒经冻融法转化到只含辅助质粒的根癌农杆菌中,完成双元载体系统的构建。每步的重组子经特异引物PCR验证和酶切验证有相应的特异条带存在,且测序鉴定序列正确。确认成功构建了TMV复制酶基因靶向的RNAi双元载体,为RNAi技术在植物病毒病害防治中的应用奠定基础。

关键词: TMV复制酶基因, RNA干涉, 载体构建

Abstract: The TMV-replicase gene was regarded target-directed sequence for RNA interference in this paper. The target sequence was linked to pMD18-T Simple Vector and replicated in E.coli DH 5α. after obtained by RT-PCR reaction. The pMD18-T Simple vector (which contains target sequence) was digested restrictively by double-endonuclease, after purifying the digested product was inserted into pUCCRNAi vector by the counterrepeat way. Then the counterrepeated structure of target sequence was inserted into pC2300-35s-OCS expression vector after enzyme disgested. The recombination plamid was transferred into Agrobacterium tumefaciens which only contained assistant plasmid in order to construct double-plasmid expression vector. With PCR reaction and restriction endonuclease digestion, the target gene sequence was comfirmed in engineering-bacterium.

Key words: TMV-replicase gene, RNA interference, vectoer construction

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