›› 2009, Vol. 11 ›› Issue (1): 86-91.

• 研究报告与简报 • 上一篇    下一篇

水稻C端结合蛋白家族基因OsCtBP-A的克隆及表达分析

李磊,吴茂森,李广旭,何晨阳   

  1. (中国农业科学院植物保护研究所, 植物病虫害生物学国家重点实验室, 北京 100193)
  • 收稿日期:2008-09-02 修回日期:2008-12-01 出版日期:2009-02-15 发布日期:2009-07-29
  • 通讯作者: 何晨阳,研究员,博士,研究方向为分子植物病理学。Tel: 010-62894147; E-mail: cyhe@caas.net.cn
  • 作者简介:李磊,硕士研究生,从事水稻抗/感病功能基因的研究。E-mail: settling1984@126.com。
  • 基金资助:

    中央财政国家重点实验室自主研究课题专项(SKL2007SR06)资助。

Analysis on Cloning and Expression of OsCtBP-A, a C Terminal
Binding Protein (CtBPs) Family Gene of Rice

LI Lei, WU Mao-sen, LI Guang-xu, HE Chen-yang   


  1. (State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection,
    Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Received:2008-09-02 Revised:2008-12-01 Online:2009-02-15 Published:2009-07-29

摘要:

利用5′-RACE方法克隆了在水稻与白叶枯病菌(Xanthomonas oryzae pv. oryzae,简称Xoo)互作过程中下调表达的水稻C端结合蛋白家族基因OsCtBP-A的全长序列。通过生物信息学方法分析了该基因及编码蛋白质的结构特征,OsCtBP-A由424氨基酸组成,N端具有2-Hacid_dh_C保守结构域,C端具有植物CtBPs家族特有的NLS和PEST基序,氨基酸序列与拟南芥和牵牛花CtBPs同源物的同源性为63%;基因启动子区推测具有ABA和SA应答调控元件。OsCtBP-A基因对不同信号分子应答的RTQ-PCR分析表明,水杨酸(SA)、茉莉酸甲酯(MeJA)、乙烯(ETH)和脱落酸(ABA)处理水稻后均能诱导该基因的转录表达,但诱导能力有所差异,其中ABA诱导活性最强。

关键词: 水稻;C端结合蛋白;基因表达;信号分子;实时定量PCR

Abstract:

A full-length cDNA encoding the C terminal binding protein gene OsCtBP-A, which is down-

regulated during interaction between rice and Xanthomonas oryzae pv. oryzae (Xoo), was

cloned by 5′-RACE. Bioinformatics was employed to elucidate the structure of this gene

and its encoded protein. OsCtBP-A consists of 424 amino acids, with a 2-Hacid_dh_C domain

in N terminal and NLS, PEST motif which are peculiar for plant CtBPs family in C

terminal. Sequence alignment showed OsCtBP-A protein shares a 63% identity with

homologues of Arabidopsis and Ipomoea nil. Furthermore, ABA and SA response elements were

identified within the promoter of OsCtBP-A gene. Real-time quantitative PCR (RTQ-PCR)

showed that OsCtBP-A was induced by salicylic acid (SA), ethane (ETH), methyl jasmonate

(MeJA) and abscisic acid (ABA) treatments with various expression levels respectively.

OsCtBP-A transcript increased drastically with ABA treatment.

Key words: rice, CtBPs, gene expression, signal molecule, real-time quantitative PCR(RTQ-PCR)

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