Team:Chiba/Sender experiments/Senders(XL10Gold) T9002(JW1908)

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Results

Reaction temparature:37°C

Sender culture：500μL,Receiver：500μL

Fig.1　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C
Fig.2　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C
Fig.3　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C


  • Fig. 1
  • results

Cultures containing cells transformed with LuxI gene([http://partsregistry.org/Part:BBa_K084012 BBa_K084012])and cells transformed with RhlI gene([http://partsregistry.org/Part:BBa_K084008 BBa_K084008]) express gfp and fluorescence intensity was reached to 500.Cultures containing cells transformed with LasI gene([http://partsregistry.org/Part:BBa_K084007 BBa_K084007]) weakly expressed gfp,and fluorescence intensity was not reached to a significant level.

  • Discussion:Maximum fluorescence intensity was vary,however,time before gfp expression doesn't differ.
  • We concluded that LasI gene([http://partsregistry.org/Part:BBa_K084007 BBa_K084007]) was not work well at this condition.
  • Fig. 2
  • Results

Fluorescence intensity of the culture containing cells transformed with LuxI gene([http://partsregistry.org/Part:BBa_K084012 BBa_K084012]) was lower than that of the cultures containing the cells transformed with LVA LuxI-LVA gene([http://partsregistry.org/Part:BBa_K084014 BBa_K084014]).The difference of maximum fluorescence intesity between the two cultures was 200.

  • Discussion
  • The rate of AHL synthesis decreased by the degradation of autoinducer synthase,however,the length of time before gfp expression is same.


  • Fig. 3
  • Results

Cultures containing cells transformed with RhlI gene([http://partsregistry.org/Part:BBa_K084008 BBa_K084008]) and RhlI+LVA([http://partsregistry.org/Part:BBa_K084009 BBa_K084009]) draw the same transfer curve.

  • Discussion
  • We concluded that there was no effect of LVA-tag on time before gfp expression.



Fig.4　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C
Fig.5　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C



Sender culture：100μL,Receiver：1000μL

Fig. 6　　
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,37°C


Sender culture：10μL,Receiver：1000μL

Reaction temparature:30°C

  • Sender culture：500μL, Receiver culture：500μL
Fig.7　　
E.coli strain,BBa_K084007:XL10Gold,BBa_T9002:JW1908,30°C
Fig.8　　
E.coli strain,BBa_K084007:XL10Gold,BBa_T9002:JW1908,30°C


  • Fig. 7
  • Result 　
  1. The highest maximum fluorescence intensity was caused by RhlI gene,followed by LuxI(with LVA) and LasI gene.
  2. Fluorescence intensity of the two culture containing cells transformed with LuxI gene and RhlI gene　amount to 200 for 2 hour as fast as LasI gene.
  • Discussion
  1. Maximum fluorescence intensity caused by RhlI gene was higher than that caused by LuxI gene.There are two reasons:
  2. RhlI was more active at this experimental condition.
  3. LuxI was well degraded by protease.
  4. We concluded that LVA-tag effective in this condition.


  • Fig. 8
  • Result
  1. Comparing RhlI with Rhl+LVAtag, fluoroscence intensity were almost same.
  • Discussion
  1. In this condition, production efficiency of LuxI protein higher than of LVAtag.

Reaction temparature:25°C

Sender culture：500μL,Receiver culture：500μL

Fig.9
E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,25°C
Fig.10
　E.coli strain,Senders:XL10Gold,BBa_T9002:JW1908,25&ded;C


  • Fig.9
    • result
      • The value of fluoroscence intensity by LuxI, RhlI, LasI gene at 25°c were almost the same as negative control at 30 and 37°c.
      • The last value of fluoroscence intensity by LasI gene was a half of LuxI and RhlI.
    • Discussion
      • Low temperature of 25°c caused decrease of production efficiency of AHL synthase.
      • Static culture keep sender and receiver from shaking, in the end , expression of GFP decreased.
  • Fig.10
    • Result
      • The fluoroscence intensity by RhlI with LVAtag is less than RhlI without LVAtag.
    • Discussion
      • LVAtag is effective in this condition.


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