苜蓿根瘤菌(Sinorhizobium meliloti)nodD3P1启动子下游序列的缺失和互补分析

被引：2

作者：

陈迪

刘彦杰

朱家璧

沈善炯

俞冠翘

机构：

[1] 中国科学院上海生命科学研究院植物生理生态研究所分子遗传研究室

来源：

中国科学(C辑:生命科学) | 2002年 / 06期

关键词：

苜蓿根瘤菌; nodD3基因; 下游序列; 自我调节作用;

D O I：

暂无

中图分类号：

Q933 [微生物遗传学];

学科分类号：

071007 ;

摘要：

在苜蓿根瘤菌中,nodD3基因的转录由两个彼此分离的启动子P1和P2控制.在P1下游是一段由660 bp组成的序列,接着是nodD3的编码区.由P1下游序列3’末端开始缺失得到的一系列缺失突变体的遗传分析指出,P1下游+1～+125 nt序列对P1的表达是必须的.互补分析和结瘤试验指出,ORF2自我抑制P1的表达,而+1～+125nt序列可对抗ORF2对P1的抑制作用.

引用

页码：512 / 518

页数：7

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