LeWRKY1 基因的克隆及分析

于涌鲲1, 王丽芳1,2, 杜希华2, 赵福宽1, 孙清鹏1,*
1北京农学院生物技术学院, 北京102206; 2山东师范大学生命科学学院, 济南250014

通信作者:孙清鹏;E-mail: sunqp@bac.edu.cn;Tel: 010-86075292

摘 要:

采用 RT-PCR 和 RACE 技术克隆了番茄 LeWRKY1 cDNA (Genbank 登录号为 FJ654265)全长, 用生物信息学的方法对 其进行分析, 预测其编码的蛋白的定位和功能。同时利用 Northern 杂交技术分析了 JA (jasmonic acid)或 SA (salicylic acid) 刺激时 LeWRKY1 在野生型番茄和番茄 JA 不敏感突变体 jai1 (JASMONATE-INSENSITIVE1)及番茄 JA 生物合成突变体 spr2 (prosystemin-mediated responses2)中的表达情况。LeWRKY1 cDNA 序列全长 1 740 bp, 阅读框 1 083 bp。生物信息学分析表 明 LeWRKY1 含有 1 个 WRKY 结构域和 1 个 C2H2 型锌指结构。LeWRKY1 可能是一种定位于细胞核的 DNA 结合蛋白, 并 可能具有转录调控、信号传导功能。表达分析推测 LeWRKY1 的表达是 JA 依赖而非 SA 依赖性的, 且 LeWRKY1 的表达不依 赖于生物体内 JA 的从头合成。

关键词:番茄; LeWRKY1 ; 茉莉酸; 水杨酸

收稿:2010-09-02   修定:2010-09-26

资助:北京市自然科学基金(5102015)。

Isolation and Analysis of LeWRKY1

YU Yong-Kun1, WANG Li-Fang1,2, DU Xi-Hua2, ZHAO Fu-Kuan1, SUN Qing-Peng1,*
1College of Biotechnology, Beijing University of Agriculture, Beijing 102206, China;2College of Life Science, Shandong Normal University, Jinan 250014, China

Corresponding author: SUN Qing-Peng; E-mail: sunqp@bac.edu.cn; Tel: 010-86075292

Abstract:

The full length of LeWRKY1 cDNA (GenBank no. FJ654265) was cloned by RT-PCR and RACE approaches, and its cellular localization and function was deduced by bioinformatics methods. Using Northern blotting, LeWRKY1 expression in wild type tomato, JA insensitive tomato mutation jai1, and JA biosynthesis mutation spr2 were analyzed. The cloned LeWRKY1 cDNA was 1 740 bp with a 1 083-bp ORF. Bioinformatics analysis showed that LeWRKY1 might be a DNA binding protein located in the nucleus contained a WRKY domain and a C2H2 zinc finger motif, which might have the function of transcription, transcriptional regulation and signal transduction. Expression analysis indicated LeWRKY1 in tomato was JA dependent but SA independent, and LeWRKY1 was induced by JA, but it is independent on the de novo synthesis of JA.

Key words: tomato; LeWRKY1; jasmonic acid; salicylic acid

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