Difference between revisions of "Part:BBa K1824000"

Revision as of 12:43, 17 September 2015

Constitutive Promoter J23119 + RNA Thermometer A1

This is a composite regulatory part that consisting of constitutive promoter BBa_J23119 and RNA Thermometer A1 BBa_K1824556 for temperature induced gene expression at 42 degrees. The possible secondary structure of A1 was simulated by RNAstructure (Fig.1). This combination is compatible with the assembly method that XJTLU-CHINA promoted.

Figure 1: Possible secondary structure of RNAT A1.

Characterization

Figure 2: The fluorescence of J23119+A1 with different dilution ratio at 30℃ and 37℃.


eGFP protein was used as report protein to show the function of ribothermometer. The bacteria were centrifuged and observed under UV light by eyes directly. Then the bacteria were sonicated and plate reader was used to measure the fluorescence of eGFP.
As Figure 2 shows, the fluorescence of the sample at 37℃ is 12 times higher than the fluorescence of the sample at 30℃, which means the amount of protein express at 37℃ is 12 times bigger than at 30℃.

References

1. Nocker, A. et al. mRNA-based thermosensor controls expression of rhizobial heat shock genes. Nucleic Acids Res. 29, 4800–4807 (2001).

Sequence and Features