This page describes characterisation for part [http://partsregistry.org/Part:BBa_K325909 BBa K325909], the lux operon from Vibrio fischeri.

• Description
• Arabinose to light
• H-NS mutants

Description

E.Coli (Invitrogen TOP 10) cells transformed with [http://partsregistry.org/Part:BBa_K325909 BBa K325909] (blue light bulb) and [http://partsregistry.org/Part:BBa_K325219 BBa 325219] (red light bulb)

This page described the lux operon from Vibrio fischeri. To relieve LuxR control we placed Lux C, D, A, B, E under the pBad promoter.

Figure 1 - E.coli cells (Invitrogen TOP 10) transformed with [http://partsregistry.org/Part:BBa_K325909 BBa K325909] in a 96 well plate.

Arabinose to light

This page describes the relationship between Arabinose concentration in the medium with light output. We used a [http://www.bmglabtech.com/products/microplate-reader/instruments.cfm?product_id=2 FLUOstar OPTIMA] microplate reader to quantify the light output. Protocol and plate reader settings used are given below.

Data

Figure 1 - Light output of <partinfo>K325909</partinfo> as a function of Arabinose concentration in the media. The values correspond to the peak intensity within 5 hours of adding Arabinose to the media. Data points and error bars correspond to the mean and the standard deviation of 3 time repeats.

Figure 2 - Evolution of luminescence with time at different Arabinose concentrations for <partinfo>K325909</partinfo>. Measurements were taken every 30 minutes. Data points and error bars correspond to the mean and standard deviation of 3 time repeats.

H-NS mutants

It has been shown that the expression of the Vibrio fischeri lux operon when cloned into E. coli was repressed. This repression was linked to the nucleoid protein H-NS. To investigate this effect we cloned the operon into mutant E.coli cells in which the expression of the H-NS protein had been modified. We used a [http://www.bmglabtech.com/products/microplate-reader/instruments.cfm?product_id=2 FLUOstar OPTIMA] microplate reader to quantify the light output. Protocols and plate reader settings used are given below.

Data

Figure 1 - Peak light output from <partinfo>K325909</partinfo> cloned into H-NS mutant JM 230 H-NS -205::tn10. The data points and the error bar are the mean and standard deviation obtained by 3 tim repeats.

Figure 2 - Evolution of light output from <partinfo>K325909</partinfo> cloned into H-NS mutant JM 230 H-NS -205::tn10 with time at different Arabinose concentrations. The data points and the error bar are the mean and standard deviation obtained by 3 time repeats. Measurements were taken every 30 minutes.

Figure 3 - Figure 3 - Peak light output from <partinfo>K325909</partinfo> cloned into H-NS mutant [http://www.ecoliwiki.net/colipedia/index.php/BW25113 BW25113 DELTA H-NS::kan]. The data points and the error bar are the mean and standard deviation obtained by 3 tim repeats.

Figure 4 - Evolution of light output from <partinfo>K325909</partinfo> cloned into H-NS mutant [http://www.ecoliwiki.net/colipedia/index.php/BW25113 BW25113 DELTA H-NS::kan] with time at different Arabinose concentrations. The data points and the error bar are the mean and standard deviation obtained by 3 time repeats. Measurements were taken every 30 minutes.

Compatibility

[http://partsregistry.org/cgi/partsdb/pgroup.cgi?pgroup=cell Chassis:] Device has been shown to work in Top 10 (Invitrogen) Plasmids: Device has been shown to work on <partinfo>pSB1C3</partinfo>

References

[http://www.ncbi.nlm.nih.gov/pubmed/18949818 [1]:] S.M. Marques and J.C.G. Esteves da Silva, (2009) Firefly Bioluminescence: A Mechanistic Approach of Luciferase Catalyzed Reactions,Life 61, 6-17.

[http://www.nature.com/nature/journal/v440/n7082/abs/nature04542.html [2]:] T. Nakatsu et al. (2006) Structural Basis for the spectral difference in luciferase bioluminescence, Nature 440(16), 372-376.

[http://www.ncbi.nlm.nih.gov/pubmed/11457857 [3]:] K. Gomi and N. Kajiyama, (2001) Oxyluciferin, a Luminescence Product of Firefly Luciferase, Is Enzymatically Regenerated into Luciferin, The Journal of Biological Chemistry, 276(39), 36508-36513.