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菜蛾盘绒茧蜂畸形细胞TATA结合蛋白基因的克隆与序列分析

潘璟, 谷启娟, 时敏, 陈学新   

  1. 浙江大学昆虫科学研究所/农业部农业昆虫学重点实验室, 杭州 310058
  • 收稿日期:2014-01-23 修回日期:1900-01-01 出版日期:2014-06-08 发布日期:2014-06-08
  • 通讯作者: 陈学新,博士,教授,E-mail:xxchen@zju.edu.cn。

Cloning and Sequence Analysis of TATA-binding Protein from the Teratocytes of Cotesia vestalis

PAN Jing, GU Qijuan, SHI Min, CHEN Xuexin   

  1. Key Laboratory of Agricultural Entomology, Ministry of Agriculture/Institute of Insect Sciences, ZhejiangUniversity, Hangzhou 310058, China
  • Received:2014-01-23 Revised:1900-01-01 Online:2014-06-08 Published:2014-06-08

摘要: TATA结合蛋白(TATA-binding protein,TBP)及其相关因子是转录起始复合物TFIID的重要组分,能识别TATA元件并与之特异性结合,进而指导RNA聚合酶和其它转录因子有序装配,形成稳定的转录起始复合物。本文采用RT-PCR和RACE技术克隆获得了菜蛾盘绒茧蜂Cotesia vestalis畸形细胞TATA结合蛋白(CvT-TBP)基因的cDNA序列(GenBank No. JX984954),序列全长6105 bp,开放阅读框5784 bp,编码1927个氨基酸,预测分子量213.8 kDa,理论等电点6.82。氨基酸序列分析表明,CvT-TBP与其他膜翅目昆虫的TBP有很高的同源性,其中与切叶蜂Megachile rotundata、小蜜蜂Apis florea和佛罗里达弓背蚁Camponotus floridanus的相似性均为72%。本研究克隆得到的畸形细胞TATA box结合蛋白cDNA序列,为进一步研究该基因功能以及畸形细胞的作用机理提供了基础数据。

Abstract: The TATA-binding protein (TBP) and other associated factors are the central elements of the transcription factor, TFIID. The TATA-binding protein recognizes the TATA sequence and specifically binds to it, which recruits RNA polymerase and other transcription factors to form a stable transcription initiation complex. Here we cloned a TATA binding protein gene of Cotesia vestalis teratocyte (CvT-TBP) (GenBank No. JX984954) using RT-PCR and RACE methods. The full length of this cDNA fragment is 6105 bp, containing an open reading frame of 5784 bp which encodes 1927 amino acid residues with a predicted molecular weight of 213.8 kDa and isoelectric point of 6.82. Homology analysis using BlastP showed that the amino acid sequence of CvT-TBP had a high similarity with those of TBPs from other insects, sharing 72% identity with those of Megachile rotundata, Apis florea and Camponotus floridanus. The results provide a basis for further study of the functional mechanism of teratocytes.

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