Part:BBa_K2066550:Experience
Sequence confirmed
Applications of BBa_K2066550
To test our ability to shift our example circuit, a pTet GFP and constitutive tetR, we obtained a plasmid containing 85x TetO repeats off of Addgene from Finney-Manchester et al. (2013) (“Harnessing mutagenic homologous recombination for targeted mutagenesis in vivo by TaGTEAM). We moved the segment containing the repeats to the Biobrick Backbone, and then transformed a reporter circuit containing pTet GFP and TetR (Bba_K2066053) on the high copy plasmid 1A3 either with or without the repeat array on the high copy 1C3 backbone. We induced both circuits with varying concentrations of aTC and then measured fluorescence using flow cytometry, which allowed us to get single cell level resolution.
Figure 2: Population level FACs data comparing the relative fluorescence of a pTet GFP and TetR reporter with and without a tetO binding array. While the data is noisy, it is clear that the inflection point of the circuit with the binding array has shifted to the left as expected. Additionally, both circuits experienced a decrease in fluorescence at higher aTC concentrations, this is likely due to the toxicity of aTC in high concentrations.
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