Difference between revisions of "Part:BBa K117002:Experience"

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[[Image:lsrA_promoter_activity.png|thumb|center|700px|Fluorescence intensity of promoter lsrA-gfp((BBa_K117002)-gfp) was almost the same as promoterless-gfp(negative control).<br>Strain used in this assay lacks lsrR.<br>This work is done by Takuya Tsubaki.]]
 
[[Image:lsrA_promoter_activity.png|thumb|center|700px|Fluorescence intensity of promoter lsrA-gfp((BBa_K117002)-gfp) was almost the same as promoterless-gfp(negative control).<br>Strain used in this assay lacks lsrR.<br>This work is done by Takuya Tsubaki.]]
  
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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.  
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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 LsR repression, gene transcription does not take place suffuciently.
  
  

Revision as of 19:47, 5 October 2011

This experience page is provided so that any user may enter their experience using this part.
Please enter how you used this part and how it worked out.

Applications of BBa_K117002

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

Characterisation:

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

User Reviews

UNIQbb998bce3a54d57f-partinfo-00000000-QINU UNIQbb998bce3a54d57f-partinfo-00000001-QINU

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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 LsR repression, gene transcription does not take place suffuciently.


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_K11702-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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