Difference between revisions of "Part:BBa K1017101"
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In general, the red light sensing promoter, OmpC promoter, turns on in the dark and turns off under red light with the present of Cph8. | In general, the red light sensing promoter, OmpC promoter, turns on in the dark and turns off under red light with the present of Cph8. | ||
| − | [[File:Nctu_formosa_cph8mechnism.jpg| | + | [[File:Nctu_formosa_cph8mechnism.jpg|thumb|600px|center|Figure 1.'''The light receptor cph8 is composed of cph1(pink) and envZ-ompR(maroon).''']] |
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===Quantitative data showing the Part or Device function=== | ===Quantitative data showing the Part or Device function=== | ||
To test whether red light can regulate P<sub>red</sub> or not, we measured the florescence expression of E. coli that were exposed to red light under 37 °C. The figure shows that red light can in fact activate P<sub>red</sub>. Colony 5 displays a high normalized expression under red light, suggesting that the biobrick was successfully activated by red light. On the other hand, colony 3 might be mutated, as it shows only little expression. | To test whether red light can regulate P<sub>red</sub> or not, we measured the florescence expression of E. coli that were exposed to red light under 37 °C. The figure shows that red light can in fact activate P<sub>red</sub>. Colony 5 displays a high normalized expression under red light, suggesting that the biobrick was successfully activated by red light. On the other hand, colony 3 might be mutated, as it shows only little expression. | ||
| − | [[File:600px-NCTU result Activation Efficiency of light regulated system.png|600px|center|Colony 5 shows a higher expression as it is activated by red light. Colony might be mutated, since it didn’t seem to be activated.]] | + | |
| + | [[File:600px-NCTU result Activation Efficiency of light regulated system.png|thumb|600px|center|Figure 2.'''Colony 5 shows a higher expression as it is activated by red light. Colony might be mutated, since it didn’t seem to be activated.''']] | ||
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<p>Positive control: Pcons+mGFP. Negative control:tet 30. Pred is activated by red | <p>Positive control: Pcons+mGFP. Negative control:tet 30. Pred is activated by red | ||
light and shows strong GFP expression that is close to the expression of the positive | light and shows strong GFP expression that is close to the expression of the positive | ||
control.</p> | control.</p> | ||
| − | [[File:NCTU_result_Pred_fluo.png|center|600px]] | + | [[File:NCTU_result_Pred_fluo.png|thumb|600px|center|Figure 3.'''Positive control: Pcons + mGFP. Negative control: tet 30. Pred is activated by red light and shows strong GFP expression that is close to the expression of the positive control.''']] |
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| + | <p>Exposing '''P<sub>red</sub> + mGFP''' under red light, we measured its fluorecence and compared with the counterpart in the dark.</p> | ||
| + | [[file:NCTU_result_Activation_Efficiency_of_light_regulated_system_2.png|thumb|600px|center|Figure 4. '''Comparing the efficiency of P<sub>red</sub> under red light and dark. The data indicates that our P<sub>red</sub> do actually work''']] | ||
<!-- Add more about the biology of this part here | <!-- Add more about the biology of this part here | ||
===Usage and Biology=== | ===Usage and Biology=== | ||
Latest revision as of 16:24, 2 October 2013
Pred ( PompC + B0032 + LacI + J61048 + Plac)
In general, the red light sensing promoter, OmpC promoter, turns on in the dark and turns off under red light with the present of Cph8.
But we want to construct a more intuitive light regulating th system at can turn on under red light and turn off in the dark. So we created a new biobrick named red promoter by adding a lac operon to inverse the function of OmpC promoter.
Pred, including PompC,RBS(B0032), LacI, ter(J61048), and Plac, can be activated when exposed to red light. OmpR, the transcription factor of PompC, is active when being phosphorylated in dark and inactive under red light. In the presence of red light, the non phosphorylated OmpR cannot turn on PompC. Thus, Plac won't be repressed by the negative regulator, LacI. So the whole Pred can express genes downstream Plac. On the other hand, if there is no red light, the phosphorylated OmpR then turn on PompC, causing LacI to be expressed and repress Plac to translate the genes downstream.
Quantitative data showing the Part or Device function
To test whether red light can regulate Pred or not, we measured the florescence expression of E. coli that were exposed to red light under 37 °C. The figure shows that red light can in fact activate Pred. Colony 5 displays a high normalized expression under red light, suggesting that the biobrick was successfully activated by red light. On the other hand, colony 3 might be mutated, as it shows only little expression.
Positive control: Pcons+mGFP. Negative control:tet 30. Pred is activated by red light and shows strong GFP expression that is close to the expression of the positive control.
Exposing Pred + mGFP under red light, we measured its fluorecence and compared with the counterpart in the dark.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BglII site found at 1282
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal NgoMIV site found at 1296
- 1000COMPATIBLE WITH RFC[1000]