Difference between revisions of "Part:BBa E0422"

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<partinfo>BBa_E0422 parameters</partinfo>
 
<partinfo>BBa_E0422 parameters</partinfo>
 
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===Team: Tianjin 2019 characterization===
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2019 Team:Tianjin have tested the fluorescence intensity and detailed fluorescence excitation curve by connecting it to the combined promoters J23110 and J23115. However, our final results are not optimistic. Most of the samples we tested have very low fluorescence excitation intensity.
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[[File:T--Tianjin--04221.png|500px|thumb|none|Figure 1. Characterization scheme used by Team Tianjin]]
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We linked the constructed fragment to the plasmid pRS415 and transformed it into Match 1 strain. Under normal culture conditions (LB+amp solid medium, 37℃), the Match 1 strain was cultured overnight. After about 8 hours, the colony was visible to the naked eye, with no obvious difference in appearance from ordinary e. coli (ECFP was not visible to the naked eye).
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[[File:T--Tianjin--04222.jpg|500px|thumb|none|Figure 2. E. coli bacteria with ECFP fluorescent protein]]
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<br>
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The experiment design<br>
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1.PCR validation<br>
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Because ECFP was not visible with the naked eye, we performed colony PCR validation to confirm whether the transformation was successful.<br><br>
 +
2.Determination by fluorescence microplate reader<br>
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The bacteria verified in the previous step were cultured separately overnight, then a small number of bacteria were selected and suspended in 200μL ddH2O, and the fluorescence intensity of the same bacteria was measured under emission/excitation of 439/476nm (reference value).
 +
[[File:T--Tianjin--04223.png|500px|thumb|none|Figure 3. The fluorescence intensity of ECFP compared with the blank control]]
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We did not detect the fluorescence excitation corresponding to this part, which may be due to incorrect culture conditions or some problems of this part itself. We have sent this part to be sequenced for analysis, but until the final freezing, we haven't got the relevant results yet.

Revision as of 19:28, 21 October 2019

ECFP (RBS+ LVA+ TERM) (B0034.E0022.B0015)

Cyan fluorescent protein with ribosome binding site and terminator


Usage and Biology

This part can be used to test promoter strength or the proper functioning of a regulator device. The LVA tail is particularly useful when testing a regulatory device, for example to assess the efficiency of repressor.

In this experiment, the E0422 part was associated with a cI regulated promoter (part R0051), resulting in K1707028.

Figure 1: Fluorescence microscopy of E. coli DH5alpha bearing K170728

Paris Saclay K1707028 w1POL.png Differential interference contrast

Paris Saclay K1707028 w2Lumencor CFP 434-17.png Excitation with led 437 nm/17nm (CFP), 100 ms of exposure Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


Team: Tianjin 2019 characterization

2019 Team:Tianjin have tested the fluorescence intensity and detailed fluorescence excitation curve by connecting it to the combined promoters J23110 and J23115. However, our final results are not optimistic. Most of the samples we tested have very low fluorescence excitation intensity.

Figure 1. Characterization scheme used by Team Tianjin

We linked the constructed fragment to the plasmid pRS415 and transformed it into Match 1 strain. Under normal culture conditions (LB+amp solid medium, 37℃), the Match 1 strain was cultured overnight. After about 8 hours, the colony was visible to the naked eye, with no obvious difference in appearance from ordinary e. coli (ECFP was not visible to the naked eye).

Figure 2. E. coli bacteria with ECFP fluorescent protein


The experiment design
1.PCR validation
Because ECFP was not visible with the naked eye, we performed colony PCR validation to confirm whether the transformation was successful.

2.Determination by fluorescence microplate reader
The bacteria verified in the previous step were cultured separately overnight, then a small number of bacteria were selected and suspended in 200μL ddH2O, and the fluorescence intensity of the same bacteria was measured under emission/excitation of 439/476nm (reference value).

Figure 3. The fluorescence intensity of ECFP compared with the blank control

We did not detect the fluorescence excitation corresponding to this part, which may be due to incorrect culture conditions or some problems of this part itself. We have sent this part to be sequenced for analysis, but until the final freezing, we haven't got the relevant results yet.