生物技术通报 ›› 2017, Vol. 33 ›› Issue (7): 89-95.doi: 10.13560/j.cnki.biotech.bull.1985.2016-1114

• 研究报告 • 上一篇    下一篇

小桐子类固醇还原酶基因Jc5β-StR的克隆和表达分析

黄尧瑶1,文锦芬2,邓明华3,龚明4,陈浩维1   

  1. 1. 昆明理工大学现代农业工程学院,昆明 650500;
    2. 昆明理工大学建筑与城市规划学院,昆明 650500;
    3. 云南农业大学园林园艺学院,昆明 650201;
    4. 云南师范大学生命科学院,昆明 650500
  • 收稿日期:2016-12-08 出版日期:2017-07-11 发布日期:2017-07-11
  • 作者简介:黄尧瑶,女,硕士研究生,研究方向:分子生物学;E-mail:358680047@qq.com
  • 基金资助:
    国家自然科学基金项目(31460355)

Cloning and Expression Analysis of Jc5β-StR Gene in Jatropha curcas

HUANG Yao-yao1, WEN Jin-fen2 ,DENG Ming-hua3, GONG Ming4 ,CHEN Hao-wei1   

  1. 1. Faculty of Modern Agricultural Engineering,Kunming University of Science and Technology,Kunming 650500;
    2. Faculty of Architecture and City Planning,Kunming University of Science and Technology,Kunming 650500;
    3. Faculty of Landscape and Horticulture,Yunnan Agricultural University,Kunming 650201;
    4. School of Life Sciences,Yunnan Normal University,Kunming 650500
  • Received:2016-12-08 Published:2017-07-11 Online:2017-07-11

摘要: 以小桐子(Jatropha curcas L.)cDNA为模版,克隆了Jc5β-StR基因的CDS序列,并对其序列进行了生物信息学分析。序列分析表明该基因包含1 173 bp开放阅读框(ORF),编码390个氨基酸。预测其编码蛋白质的相对分子量为44.23 kD,理论等电点为5.22。Blast搜索结果及进化分析结果表明,Jc5β-StR与蓖麻5β-StR蛋白序列一致性最高(87%)且亲缘关系最近。Jc5β-StR是一个短链还原酶,该蛋白编码有一个短链还原酶家族(SDRs)的黄体酮5β还原酶(5β-POR),还含有SDRs的6个保守结构域。组织表达结果显示Jc5β-StR在小桐子根、茎、叶、花、果皮和种子中都有表达,在种子中表达量最高,且随种子发育过程表达量逐渐上升,在种子生长发育的后期(50 d)达到最高值后下降。非生物胁迫(PEG、NaCl、低温和机械损伤)诱导下,Jc5β-StR的表达量都不同程度上调,推测其参与小桐子非生物胁迫响应。

关键词: 小桐子, Jc5β-StR, 克隆, 生物信息学分析, 表达分析

Abstract: The CDS sequence of Jc5β-StR gene was cloned with Jatropha curcas cDNA as template,and analyzed by bioinformatics analysis. The opening reading frame(ORF)of Jc5β-StR was 1 173 bp encoded 390 amino acids. The predicted molecular weight was 44.23 kD,and theoretical isoelectric point(pI)was 5.22. Blast searching and phylogenetic analysis showed that Jc5β-StR had highest identity(87%)and closest relationships with the 5β-StR of Ricinus communis. Jc5β-StR was a short-chain reductase,containing a progesterone 5β reductase(5β-POR)in a family of short chain reductase(SDRs),and also 6 conserved domains of SDRs. Jc5β-StR expressed in different tissues of root,stem,leave,flower,seed capsule,and seed,the 1highest in seed;moreover,the expression gradually rose with the development of seed,and declined after peak in the later stage of seed development(50 d). The abiotic stress such as NaCl,PEG,4℃,and mechanical damage resulted in the up-regulation of Jc5β-StR expression in varied level,indicating that Jc5β-StR involved in the response to abiotic stress.

Key words: Jatropha curcas L., Jc5β-StR, clone, bioinformatics analysis, expression analysis