Difference between revisions of "Part:BBa K649001:Experience"

(→‎Applications of BBa_K649001)
(→‎User Reviews)
 
(11 intermediate revisions by 3 users not shown)
Line 1: Line 1:
−
__NOTOC__
 
−
This experience page is provided so that any user may enter their experience using this part.<BR>Please enter
 
−
how you used this part and how it worked out.
 
−
 
 
===Applications of BBa_K649001===
 
===Applications of BBa_K649001===
  
−
Fluorescence intensity of BBa_K649001 was increased by 3OC12-HSL induction.  
+
Fluorescence intensity of BBa_K649001 was increased by 3OC12-HSL induction. GFP expression after induction of 3OC12-HSL is 170 times as high as before.
  
  
Line 11: Line 7:
  
  
−
Generally, in the presence of 3OC12-HSL, lasR activates lasI promoter and the transcription level of downstream gene increases, but in the absence of 3OC12-HSL, lasR can't activate lasI promoter. To characterize BBa_K649000, we used Ptrc-rbs-lasR-TT as regulator part. Because lasR is constitutively expressed, the difference of fluorescence intensity by 3OC12-HSL induction indicates that BBa_K649000 is successfully regulated by 3OC12-HSL.
+
Generally, in the presence of 3OC12-HSL, LasR activates lasI promoter and the transcription level of downstream gene increases, but in the absence of 3OC12-HSL, LasR can't activate lasI promoter. To characterize BBa_K649000, we used Ptrc-rbs-lasR-TT as regulator part. Because LasR is constitutively expressed, the difference of fluorescence intensity by 3OC12-HSL induction indicates that BBa_K649000 is successfully regulated by 3OC12-HSL.
  
  
Line 18: Line 14:
 
Ptrc-rbs-lasR-TT / PlasI(BBa_I649000)-rbs-gfp-TT
 
Ptrc-rbs-lasR-TT / PlasI(BBa_I649000)-rbs-gfp-TT
  
−
Ptrc-rbs-lasR-TT / promoterless-rbs-gfp-TT (negative control)
+
Ptrc-rbs-lasR-TT / Promoterless-rbs-gfp-TT (negative control)
  
  
 
'''[Method]'''
 
'''[Method]'''
 +
<ol>
 +
<li>Overnight cultures of sample strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:100 in the medium, and overnight cultures of promoterless negative control strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:200 in the medium , and then they were incubated at 37 °C as fresh cultures.
 +
</li>
 +
<li>After their OD600 reached 0.2, we added 3 µL of 500 µM 3OC12-HSL (3OC12-HSL+) or 3 µL of DMSO (3OC12-HSL-) into the fresh cultures.
 +
</li>
 +
<li>After 3-hour incubation at 37 °C (OD reached approximately 1.80.), 0.25 mL of each culture was harvested by centrifugalization and suspended by adding 1 mL of PBS (phosphate-buffered saline).
 +
</li>
 +
<li>We dispensed 500 µL of each suspension into a disposable tube through a cell strainer, and its fluorescence intensity was measured with a flow cytometer of Becton, Dickinson and Company.
 +
</li>
 +
</ol>
  
−
①Overnight cultures of sample strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:100 in the medium, and overnight cultures of promoterless negative control strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:200 in the medium , and then they were incubated at 37 °C as fresh cultures.
+
We improved previous las promoters.<br>
 +
<ol>
 +
<li>
 +
[https://parts.igem.org/Part:BBa_J64010:Experience our assay of BBa_J64010]
 +
</li>
 +
<li>
 +
[https://parts.igem.org/Part:BBa_K091117 BBa_K091117]
 +
</li>
 +
<li>
 +
[https://parts.igem.org/Part:BBa_R0079 BBa_R0079]
 +
</li>
 +
<li>
 +
[https://parts.igem.org/Part:BBa_K195616 BBa_K195616]
 +
</li>
 +
<li>
 +
[https://parts.igem.org/Part:BBa_J69551 BBa_J69551]
 +
</li>
 +
</ol>
  
−
②After their OD600 reached 0.2, we added 3 µL of 500 µM 3O-C12-HSL (3OC12-HSL+) or 3µL of DMSO (3OC12-HSL-) into the fresh cultures.
 
  
−
③After 3-hour incubation at 37 °C (OD reached approximately 1.80.), 0.25 mL of each culture was harvested by centrifugalization and suspended by adding 1 mL of PBS (phosphate-buffered saline).
+
To prove that the LasR regulator used in our lasI prmoter assay works, we did another assay. Details about this assay can be found [http://2011.igem.org/Team:Tokyo_Tech/Projects/RPS-game/assay#1. here].
−
 
+
−
④We dispensed 500 µL of each suspension into a disposable tube through a cell strainer, and its fluorescence intensity was measured with a flow cytometer of Becton, Dickinson and Company.
+
−
 
+
−
 
+
−
We improved previous lasI promoter(BBa_J64010).[https://parts.igem.org/Part:BBa_J64010:Experience our assay of BBa_J64010]
+
  
 
===User Reviews===
 
===User Reviews===
Line 46: Line 63:
 
|};
 
|};
 
<!-- End of the user review template -->
 
<!-- End of the user review template -->
 +
 +
 
<!-- DON'T DELETE --><partinfo>BBa_K649001 EndReviews</partinfo>
 
<!-- DON'T DELETE --><partinfo>BBa_K649001 EndReviews</partinfo>

Latest revision as of 15:52, 27 September 2013

Applications of BBa_K649001

Fluorescence intensity of BBa_K649001 was increased by 3OC12-HSL induction. GFP expression after induction of 3OC12-HSL is 170 times as high as before.


Effect of 3OC12-HSL induction on fluorescence intensity
This work is done by Takuya Tsubaki.


Generally, in the presence of 3OC12-HSL, LasR activates lasI promoter and the transcription level of downstream gene increases, but in the absence of 3OC12-HSL, LasR can't activate lasI promoter. To characterize BBa_K649000, we used Ptrc-rbs-lasR-TT as regulator part. Because LasR is constitutively expressed, the difference of fluorescence intensity by 3OC12-HSL induction indicates that BBa_K649000 is successfully regulated by 3OC12-HSL.


[Sample]

Ptrc-rbs-lasR-TT / PlasI(BBa_I649000)-rbs-gfp-TT

Ptrc-rbs-lasR-TT / Promoterless-rbs-gfp-TT (negative control)


[Method]

  1. Overnight cultures of sample strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:100 in the medium, and overnight cultures of promoterless negative control strain grown at 37 °C in LB medium containing carbenicillin and kanamycin were diluted 1:200 in the medium , and then they were incubated at 37 °C as fresh cultures.
  2. After their OD600 reached 0.2, we added 3 µL of 500 µM 3OC12-HSL (3OC12-HSL+) or 3 µL of DMSO (3OC12-HSL-) into the fresh cultures.
  3. After 3-hour incubation at 37 °C (OD reached approximately 1.80.), 0.25 mL of each culture was harvested by centrifugalization and suspended by adding 1 mL of PBS (phosphate-buffered saline).
  4. We dispensed 500 µL of each suspension into a disposable tube through a cell strainer, and its fluorescence intensity was measured with a flow cytometer of Becton, Dickinson and Company.

We improved previous las promoters.

  1. our assay of BBa_J64010
  2. BBa_K091117
  3. BBa_R0079
  4. BBa_K195616
  5. BBa_J69551


To prove that the LasR regulator used in our lasI prmoter assay works, we did another assay. Details about this assay can be found [http://2011.igem.org/Team:Tokyo_Tech/Projects/RPS-game/assay#1. here].

User Reviews

UNIQ6e68cf40f73e5b65-partinfo-00000000-QINU


UNIQ6e68cf40f73e5b65-partinfo-00000001-QINU