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园艺学报 ›› 2012, Vol. 39 ›› Issue (12): 2421-2430.

• 观赏植物 • 上一篇    下一篇

月季乙烯受体基因的全长克隆及原核表达分析

唐红姝,刘道凤,薛璟祺,欧阳琳,孙翠慧,马男,高俊平   

  1. (1 中国农业大学观赏园艺与园林系,北京 100193;2 中国农业科学院蔬菜花卉研究所,北京 100081)
  • 出版日期:2012-12-25 发布日期:2012-12-25

The Full-length Cloning of Ethylene Receptor Genes and Prokaryotic Expression of RhETR3 in Roses

TANG  Hong-Shu, LIU  Dao-Feng, XUE  Jing-Qi, 欧Yang-Lin , SUN  Cui-Hui, MA  Nan, GAO  Jun-Ping   

  1. (1Department of Ornamental Horticulture and Landscape Architecture,China Agricultural University,Beijing 100193,China;2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
  • Online:2012-12-25 Published:2012-12-25

摘要: 利用已构建的月季花朵转录组数据库,筛选得到了22个与乙烯受体同源性较高的UniGene片段,并利用这些片段从月季花瓣中克隆得到了3个乙烯受体基因全长,分别为RhETR1RhETR3RhETR5。其中,RhETR1全长为2 814 bp,编码一个595 aa的肽链;RhETR3全长为2 468 bp,编码一个765 aa的肽链;RhETR5全长2740 bp,编码一个742 aa的肽链。这3个基因推定的编码蛋白分别与枣(Ziziphus jujuba)中的ZjETR1、杨树(Populus trichocarpa)中的PtETR2和砂梨(Pyrus pyrifolia)中的PpERS2同源性最高,依次为85.2%、75.8%和80.3%。蛋白同源性及结构分析表明,RhETR1和RhETR5分别与拟南芥中的ERS1和ETR1结构相似,属于第1亚家族成员,RhETR3与ERS2结构相似,属于第2亚家族成员。在花朵自然瓶插过程中,这3个基因分别表现为下调、上调和组成型表达。利用原核表达载体,选择和月季花朵开放最为相关的RhETR3,获得了和理论分子量一致的重组蛋白,表明克隆得到的RhETR3具有完整的读码框。

关键词: 月季, 乙烯, 乙烯受体, 基因克隆, 原核表达

Abstract: In this paper,twenty-two UniGene fragments that shared high homology with ethylene receptor genes were obtained from previous-constructed rose flower transcriptome database. Then the full length of three genes,RhETR1RhETR3,and RhETR5were cloned from rose petals. The full length and encoded peptide chain of RhETR1RhETR3,and RhETR5 were 2 814 bp and 595 aa,2 468 bp and 765 aa,and 2 740 bp and 742 aa,respectively. The predicted protein of the three genes shared the highest identity with ZjETR1 in Ziziphus jujuba(85.2%),PtETR2 in Populus trichocarpa(75.8%),andPpERS2 in Pyrus pyrifolia(80.3%),respectively. Further protein homologous and construction analysis indicated that RhETR1 andRhETR5were similar to ERS1andETR1in Arabidopsis,belonging to subfamily Ⅰ;RhETR3 was similar to ERS2,belonging to subfamily Ⅱ. During natural vasing life,RhETR1RhETR3,and RhETR5 showed down-regulated,up-regulated and constitutive expression,respectively. Through a prokaryotic expression system,the recombinant protein of RhETR3 was obtained,whose molecular weight was similar to that of the theoretical ones,indicating that the cloned full-length of RhETR3 has a complete open reading frame.

Key words: rose, Rosa hybrida, ethylene, ethylene receptor, gene clone, prokaryotic expression

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