Difference between revisions of "Part:BBa R0040:Experience"
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===Transcriptional control of wintergreen odor generator=== | ===Transcriptional control of wintergreen odor generator=== | ||
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Revision as of 00:32, 8 March 2008
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_R0040
Used this part to create constituitively on GFP and constituitively on OriTf, OriTr. This was one of our most-often used and reliable parts. Have not tried to de-activate it using TetR yet. Worked very well with our parts. [smelissali 6/7/06]
User Reviews
UNIQ0b90dcdf6904c7ff-partinfo-00000000-QINU
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Antiquity |
This review comes from the old result system and indicates that this part worked in some test. |
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smelissali |
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BBa_R0040, when used to regulate transcription of GFP in BBa_I7100, demonstrated the expected behavior. BBa_R0040 also worked well in the constitutive wintergreen odor generator (BBa_J45120) and banana odor generator (BBa_J45200). |
UNIQ0b90dcdf6904c7ff-partinfo-00000009-QINU
Characterization
Transcriptional control of GFP generator
Growth phase dependent transcriptional control devices
We successfully designed, constructed and tested transcriptional control devices for constitutive, stationary phase dependent and exponential phase dependent protein production (A-C). To test and verify function of our three transcriptional control devices, we assembled each control device with the GFP protein generator BBa_E0840 and monitored the fluorescence of E. coli cultures with each device over time. For each device, we plot the change in fluorescence per unit time (normalized GFP synthesis rate) versus the cell density (OD600nm) (D). The constitutive transcriptional control device produced a high GFP synthesis rate irrespective of cell density. The stationary phase transcriptional control device produced a low initial GFP synthesis rate which increased with culture cell density. The exponential phase transcriptional control device produced an initially high GFP synthesis rate which dropped off as cell density increased. Data shown are averages of triplicate measurements of cultures grown from three individual colonies of each device. Error bars are the standard deviation of the three individual cultures.
We successfully designed, constructed and tested transcriptional control devices for constitutive, stationary phase dependent and exponential phase dependent protein production (A-C). To test and verify function of our three transcriptional control devices, we assembled each control device with the GFP protein generator BBa_E0840 and monitored the fluorescence of E. coli cultures with each device over time. For each device, we plot the change in fluorescence per unit time (normalized GFP synthesis rate) versus the cell density (OD600nm) (D). The constitutive transcriptional control device produced a high GFP synthesis rate irrespective of cell density. The stationary phase transcriptional control device produced a low initial GFP synthesis rate which increased with culture cell density. The exponential phase transcriptional control device produced an initially high GFP synthesis rate which dropped off as cell density increased. Data shown are averages of triplicate measurements of cultures grown from three individual colonies of each device. Error bars are the standard deviation of the three individual cultures.
Transcriptional control of banana odor enzyme generator
Growth dependent banana odor production
To demonstrate growth phase dependent banana odor production, we compared the behavior of constitutive and stationary phase dependent banana odor generators (A and B, respectively). We measured isoamyl acetate concentrations of cultures of the constitutive and stationary phase banana odor generators at different culture cell densities (OD600nm) (C). As expected, the stationary phase banana odor generator produced very little isoamyl acetate at low cell densities but its isoamyl acetate production increased with cell density. By comparison, the constitutive banana odor generator produced more isoamyl acetate at lower cell densities than the stationary phase banana odor generator. To visually aid comparison of the two odor generators, an empirical fit to the data for each device is shown.
To demonstrate growth phase dependent banana odor production, we compared the behavior of constitutive and stationary phase dependent banana odor generators (A and B, respectively). We measured isoamyl acetate concentrations of cultures of the constitutive and stationary phase banana odor generators at different culture cell densities (OD600nm) (C). As expected, the stationary phase banana odor generator produced very little isoamyl acetate at low cell densities but its isoamyl acetate production increased with cell density. By comparison, the constitutive banana odor generator produced more isoamyl acetate at lower cell densities than the stationary phase banana odor generator. To visually aid comparison of the two odor generators, an empirical fit to the data for each device is shown.
Transcriptional control of wintergreen odor generator
Growth phase dependent wintergreen odor production
To demonstrate growth phase dependent wintergreen odor production, we compared the behavior of constitutive and exponential phase dependent wintergreen odor generators (A and B, respectively). We measured methyl salicylate concentration (relative to the pentachloronitrobenzene internal standard) of cultures of the constitutive and exponential phase wintergreen odor generators at different culture cell densities (OD600nm) (C). The constitutive and exponential phase wintergreen odor generators produced similar levels of methyl salicylate at all cell densities examined. Thus, the exponential phase wintergreen odor generator does not work as intended.
To demonstrate growth phase dependent wintergreen odor production, we compared the behavior of constitutive and exponential phase dependent wintergreen odor generators (A and B, respectively). We measured methyl salicylate concentration (relative to the pentachloronitrobenzene internal standard) of cultures of the constitutive and exponential phase wintergreen odor generators at different culture cell densities (OD600nm) (C). The constitutive and exponential phase wintergreen odor generators produced similar levels of methyl salicylate at all cell densities examined. Thus, the exponential phase wintergreen odor generator does not work as intended.