Promoter from E. coli that controls the Fes gene, involved in iron uptake.
This promoter sequence contains a RBS and a FUR binding site, although it is not clearly possible to identify them precisely. It has been shown to downregulate the expression of sfGFP or any gene down-stream in the presence of iron in the range: 10-7 to 10-4 mol.L-1
FUR (Ferric Uptake Regulation) is a transcriptional repressor of genes involved in iron homeostasis. In presence of iron FUR will be linked to the iron. This modification of conformation will induce a dimerization of FUR. Then the dimeric FUR will bind to the DNA in a Fur Binding Site and inhibit the mRNA transcription.
To realize our project we want to use this Fur binding site merged with an inhibitor (here LacI) to create an inverter system.
Fes regulatory promoter will decrease the expression of the LacI-LVA gene (LacI protein with a LVA degredation tag) when the FUR protein is dimerized in the presence of iron. This part should be used to express a gene of interest that is under control of a Lac operator (LacO). This way, the gene will be positively regulated in the presence of iron.
Sequence and Features
- 10COMPATIBLE WITH RFC
- 12COMPATIBLE WITH RFC
- 21COMPATIBLE WITH RFC
- 23COMPATIBLE WITH RFC
- 25COMPATIBLE WITH RFC
- 1000Illegal SapI.rc site found at 317