Part:BBa_K1173501
CcaS, CcaR, PcpcG2, cI(lambda), magenta
This is a composite part which is responsive to green light and controls the production of a magenta pigment. CcaS is a trans-membrane protein which responds to green light by phosphorylating CcaR when green light is present. CcaR-P then binds to a specific promoter (BBa_K592003), which allows the transcription of the cI protein. This in turn binds to a specific promoter, which prevents the transcription of a gene coding for a magenta pigment (BBa_K592012). Overall, this means that exposure of the cells to green light will halt the synthesis of magenta pigment. Inversely, lack of exposure to green light will allow the synthesis of magenta pigment.
Usage and Biology
The plate on the left was put in a static incubator containing a light box and was left to grow overnight. The plate on the right was grown overnight in an incubator which was blacked out. You can see the difference in colour, given by different expression of the eforred protein which is controlled by the CcaS and CcaR light sensitive system.
The image to the left shows liquid cultures of bacteria with the green light pathway integrated into the DNA. The light each of the liquid cultures received was varied so that the far left vial had no light and the far right vial had a high intensity of light, with the amount of light exposed to the vial increases incrementally from left to right. Here you can see that there is an intensity of light to which there is a drastic change in the amount of colour seen.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 7
Illegal NheI site found at 30
Illegal NheI site found at 667
Illegal NheI site found at 2478
Illegal NheI site found at 2501 - 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 2934
Illegal XhoI site found at 2313 - 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 1331
- 1000COMPATIBLE WITH RFC[1000]
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