Søgaard-Andersen L, Rokeach L A, Molin S
EMBO J. 1984 Feb;3(2):257-62. doi: 10.1002/j.1460-2075.1984.tb01794.x.
Fusions between the gene encoding the E protein of the IncFI plasmid F and the lac genes were constructed. Analysis of the expression of beta-galactosidase from these fusions shows that the promoter for the E protein gene is located between the incB region and the structural gene for the E protein. Near this promoter is a regulatory site on which a negative control element acts. Most likely the E protein itself acts as a repressor of E gene expression and thus autoregulates its own expression. No other gene products seem to affect the expression of the E protein gene.
构建了编码IncFI质粒F的E蛋白的基因与lac基因之间的融合体。对这些融合体中β-半乳糖苷酶表达的分析表明,E蛋白基因的启动子位于incB区域和E蛋白的结构基因之间。在该启动子附近有一个调控位点,一个负调控元件作用于其上。很可能E蛋白本身作为E基因表达的阻遏物,从而对其自身表达进行自动调节。似乎没有其他基因产物影响E蛋白基因的表达。