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Position: Home > Articles > Cloning and prokaryotic expression of Hsp70 from Meloidogyne enterolobii Acta Phytopathologica Sinica 2015,45 (1) 7-13

象耳豆根结线虫Hsp70基因的克隆与原核表达

作  者:
练冬梅;王会芳;赵志祥;陈绵才
单  位:
海南省农科院农业环境与植物保护研究所/海南省植物病虫害防控重点实验室;海南大学环境与植物保护学院
关键词:
象耳豆根结线虫;Hsp70;克隆;表达
摘  要:
采用RT-PCR、c DNA末端快速扩增法(RACE),克隆了象耳豆根结线虫Hsp70基因的全长c DNA(Me Hsp70)序列。Me Hsp70 c DNA全长2 203 bp,含有1 959 bp的开放阅读框,编码653个氨基酸,相对分子量为71.09 k Da,具有3段Hsp70家族的签名序列,Gen Bank登录号KF739434。同源性分析表明,氨基酸序列与其他真核生物的Hsp70序列具有很高的相似性。该Hsp70与其他物种中的Hsp70进行系统进化分析,结果显示,Hsp70的系统发育树不能体现物种间的亲缘关系,推测其反映的是不同物种间Hsp70生物学功能的相似性程度。构建了一个原核表达载体p EASY-E1-Me Hsp70,当IPTG终浓度为0.4~1.0 mmol/L时,能诱导表达融合蛋白。Me Hsp70基因的克隆和表达,将为象耳豆根结线虫的生态适应性机理研究提供依据。
译  名:
Cloning and prokaryotic expression of Hsp70 from Meloidogyne enterolobii
作  者:
LIAN Dong -mei;WANG Hui-fang;ZHAO Zhi-xiang;CHEN Mian-cai;Institute of Environment & Plant Protection,Hainan Academy of Agricultural Sciences,Hainan Key Laboratory for Control of Plant Diseases and Insect Pests;Environment and Plant Protection College,Hainan University;
关键词:
Meloidogyne enterolobii;;Hsp70;;cloning;;expression
摘  要:
The full length cDNA(MeHsp70) of Hsp70 from Meloidogyne enterolobii was cloned by using RT-PCR,rapid amplification of cDNA ends(RACE).The full-length cDNA of MeHsp70 was 2 203 bp containing an open reading frame(ORF) of 1 959 bp encoding a polypeptide of 653 amino acids with a predicted molecular mass of 71.09 kDa,which carried three important and intact Hsp70 signature sequences,which was registered in GenBank with accession No.KF739434.The result of sequence similarity-analysis revealed that the translated molecules showed high homology to other eukarya.The Hsp70 s phylogenetic analysis showed that the phylogenetic tree could not reflect the genetic relationship of the organisms,maybe similarity of biological functions was revealed.The complete ORF encoding MeHsp70 was inserted into pEASY-El and an expression vector pEASY-E1-MeHsp70 was constructed.The MeHsp70 protein was induced to express by 0.4-1.0mmol/L IPTG.This study provided theoretical basis supporting research on mechanisms of the ecological adaptability of M.enterolobii.

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