Part:BBa_K1493200
Ferric regulator Pfri
Pfri was obtained from Pseudomonas putida KT2440, it functions as a transcription regulator that initiates transcription of genes involved in pyoverdine synthesis. Pyoverdine is a flourescent compound that is produced by P.putida that binds to iron (III). This gene was used in order to try to increase pyoverdine production P.putida. More information can be found on our wiki.
Cloning
Primers used for cloning:
Fw: 5'-GTTTCTTCGAATTCGCGGCCGCTTCTAGATGGCGGAACAACTATCCACAAGTAAG-3'
Rev: 5-'GTTTCTTCCTGCAGCGGCCGCTACTAGTATTATTATCAGGCCTGGCGACTGGC-3'
Note: These primers already include the biobrick preffix and suffix
Characterization
The biobrick was tested in a shuttle plasmid (pSEVA258, xylS-Pm was replaced by lacIq-Ptrc from pSEVA434) and was coupled behind an IPTG inducible promoter. Plasmid was transformed in P.putida KT2440. And grown in 10ml M9 minimal medium containing iron and were incubated in 30°C while shaken overnight(done in duplo's). The next morning it was noted that transformants were slightly greener than P.putida containing an empty plasmid. Pyoverdine was measured using a spectrometer with wavelengths ranging from 350-450nm (Boukhalfa, Reilly et al. 2006).
In figure 1 it can be seen that the peak (400nm) of Pfri transforamant is higher than the peak from a P.putida containing an empty plasmid.
When looking only at the aborbance at 400nm (figure2), it can be seen that there is a 4 fold increase of pyoverdine production when Pfri is overexpressed in P.putida.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
References
- Boukhalfa, H., S. D. Reilly, R. Michalczyk, S. Iyer and M. P. Neu (2006). "Iron (III) coordination properties of a pyoverdin siderophore produced by Pseudomonas putida ATCC 33015." Inorganic chemistry 45(14): 5607-5616.
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