Terminator

Part:BBa_K3814040:Design

Designed by: Simon Tang   Group: iGEM21_Sydney_Australia   (2021-10-01)


Terminator from ECK120033736.


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


Design Notes

We have designed an inducible promoter that combines the work of two researchers (Schell & Poser, 1989; Meyer et al., 2018). It uses the nahR gene and sal promoters to activate transcription in response to the inducer salicylate, and can with a few base changes in the promoter, can provide different promoter effects. See below a diagram of the design and the base changes that induce varying transcription level effects:

Caption

Figure 1. Inducible promoter design. According to Cebolla et al. (1997), nahR produces a transcription factor that controls the expression of genes regulated by sal promoters. In the presence of salicylate, expression of those genes is facilitated.

Caption

Figure 2. Sequences that generate different expression levels of a gene (RHS). Combined with the addition of TTC (Schell & Poser, 1989), this should generate a system that is tightly repressed and highly expressed in the absence and presence of salicylate.

This terminator stops the transcription past the gene, and also controls the effect of the promoter on neighbouring genes.

Source

Pseudomonas putida genome

References

Meyer, A. J., Segall-Shapiro, T. H., Glassey, E., Zhang, J., & Voigt, C. A. (2018). Escherichia coli “Marionette” strains with 12 highly optimized small-molecule sensors. Nature Chemical Biology, 15(2), 196–204. https://doi.org/10.1038/s41589-018-0168-3


Schell, M. A., & Poser, E. F. (1989). Demonstration, characterization, and mutational analysis of NahR protein binding to nah and sal promoters. Journal of Bacteriology, 171(2), 837–846. https://doi.org/10.1128/jb.171.2.837-846.1989