数字农科院2.0

海岛棉转录因子EREB5基因的克隆及特征研究

文献类型: 中文期刊

作者: 单国芳;李付广;刘传亮;张朝军;张雪妍;武芝侠

作者机构:

关键词: 海岛棉;ERF;黄萎病;EREB5;基因克隆

期刊名称:棉花学报

ISSN: 1002-7807

年卷期: 2011 年 23 卷 03 期

页码: 205-211

收录情况: 北大核心 ; CSCD

摘要: 近年来,ERF(Ethylene-responsive element binding factor)家族转录因子已成为植物抗逆、抗病的分子机制和作物分子育种研究的热点。本研究以电子克隆、同源扩增和RACE(Rapid-amplification of cDNA ends)技术相结合的方法从海岛棉中分离出了一条新的ERF族转录因子基因,命名为EREB5。该基因包含一个573 bp长的开放阅读框,预期编码190 aa长的蛋白质分子。序列分析表明该蛋白除含有一个ERF保守域外,还含有一段核定位信号序列、一段富丝氨酸的激活域、多种磷酸化位点和一个土豆抑制子Ⅰ型家族基序等。构建系统发育树分析表明该因子属于ERF亚家族B3亚组。瞬时表达实验证明该因子定位于细胞核内,同时,凝胶阻滞实验结果说明EREB5蛋白和GCC盒具有较强的结合能力。再者,荧光定量PCR结果表明乙烯和黄萎病菌处理可以诱导该基因的表达。这些结果暗示EREB5蛋白很可能在黄萎病抗性机制中扮演者重要角色。

分类号: S562

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