Part:BBa_K117002:Experience

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Applications of BBa_K117002

This promoter is activated indirectly by AI-2 to promote whatever downstream gene ligated behind it.

The 2015 Genspace iGEM Team replaced this part with a working version of pLsrA by submitting part BBa_K1799000. We have shown that it works in the device BBa_K1799022.

Characterisation:

For information on characterisation of this new part, please visit Part K117010 Experience and Part K117008 Experience

For information on the characterization of the new Genspace 2015 version of this part visit BBa_K1799000

User Reviews

UNIQa839e41b9482d24b-partinfo-00000000-QINU UNIQa839e41b9482d24b-partinfo-00000001-QINU

• Tokyo Tech 2011

Fluorescence intensity of promoter lsrA-gfp((BBa_K117002)-gfp) was almost the same as promoterless-gfp(negative control). Strain used in this assay lacks lsrR. This work is done by Takuya Tsubaki. This part(BBa_K117002) does not work properly. To confirm this, we introduced a gfp gene(BBa_J54103) downstream of the promoter. As a consequence, fluorescence intensity of lsrA promoter-gfp((BBa_K117002)-gfp) was almost the same as promoterless-gfp(negative control), showing that lsrA promoter(BBa_K117002) does not work properly. In spite of no LsrR repression, gene transcription does not take place sufficiently. We improved this part.Our new lsrA promoter(BBa_K649100) works. If you want to know why our part works, click [http://2011.igem.org/Team:Tokyo_Tech/Projects/RPS-game/assay#5. here] and visit our team's wiki. [sample] Ptet-gfp on pSB1A2(JD22597) Promoterless-gfp on pSB6A1(JD22597) PlsrA-gfp on pSB1A2(BBa_K649104)(JD22597) PlsrA-gfp on pSB1A2(BBa_K117002-gfp)(JD22597) JD22597 is a strain lacking lsrR. [Method] 1.Overnight cultures of reporter strains grown at 37 °C in LB medium containing appropriate antibiotics were diluted 1:100 into 3 ml of LB medium and were incubated at 37 °C as fresh cultures. 2. After their OD590 reached 0.15, the fresh cultures were diluted 1:100. 3. After 4-hour incubation at 37 °C, 1 ml of each culture was moved to 1.6ml tube and its fluorescence intensity was measured with a flow cytometer.

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