ANALYSIS OF AN ANAEROBICALLY INDUCED PROMOTER FOR THE COBALAMIN BIOSYNTHETIC GENES IN SALMONELLA-TYPHIMURIUM

被引:11
作者
RICHTERDAHLFORS, AA [1 ]
ANDERSSON, DI [1 ]
机构
[1] UNIV UPPSALA, CTR BIOMED, DEPT MICROBIOL, BOX 581, S-75123 UPPSALA, SWEDEN
关键词
D O I
10.1111/j.1365-2958.1991.tb00780.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We have identified an anaerobically induced promoter for the cobalamin biosynthetic (cob) genes. In a plasmid the Cob promoter showed two of the three types of control of the intact chromosomal Cob operon: anaerobic induction and cAMP stimulation. Cobalamin repression was observed only in promoter fragments which included sequences far downstream of the transcription start site, suggesting that this control is post-transcriptional. One anaerobically induced transcript was identified and its 5' end was determined. Deletion mapping showed that 60 nucleotides upstream of the start site were sufficient for anaerobic synthesis of this transcript. Upstream of the transcription start site a putative sigma-70-dependent -10 recognition sequence was identified; however, no consensus -35 region was observed.
引用
收藏
页码:1337 / 1345
页数:9
相关论文
共 47 条