Cell-free chassis/Commercial E. coli S30

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Cell-Free Systems (back to Intro) Introduction
Chassis description
The Commercial E. coli S30 extract was purchased from Promega. It was prepared by modifications of the method described by Zubay et al (1980). E. coli strain B deficient in OmpT endoproteinase and lon protease activity was used.

The simple constitutive gene expression device BBa_I13522 has been used to characterize this cell-free chassis
In addition the BBa_F2620 device was characterised and compared to the in vivo characterisation click here for comparison

Temperature dependence
S30 Optimum Temp.JPG
Graph 1. Graph of GFPmut3b synthesized (pmol) against time (minutes) at 8oC (dark blue), 15oC (pink), 20oC (yellow) and 30oC (light blue). The simple constitutive gene expression device BBa_I13522 has been used. Each of the four coloured lines show average measurements based on three replicates of the experiment. The error bars represent the standard deviation of the measurements.
DNA quantity dependence
S30 Optimum DNA.JPG
Graph 2. Graph of GFPmut3b synthesized(pmol per min) against time (minutes) using 0ug (dark blue), 1ug (pink), 2ug (yellow), 4ug (light blue) and 6ug (purple). The simple constitutive gene expression device BBa_I13522 has been used. Each of the four coloured lines show average measurements based on two replicates of the experiment. The error bars represent the standard deviation of the measurements.
Product stability
S30 Product Stability.JPG
Graph 3. Graph of % fluorescence against time (minutes) for [GFPmut3b] of 0.62uM (pink), 1.23uM (yellow) and 1.85uM (light blue). Purified GFPmut3b was used. Please click here for the protocol for purification of GFPmut3b. Each of the three coloured lines show average measurements based on two replicates of the experiment. The error bars represent the standard deviation of the measurements.
Peak time
S30 Peak Time.JPG
Graph 4. Graph of rate of GFPmut3b synthesis (pmol per min) against time (minutes) at 8oC (dark blue), 15oC (pink), 20oC (yellow) and 30oC (light blue). The simple constitutive gene expression device BBa_I13522 has been used. Each of the four coloured lines show average measurements based on three replicates of the experiment. The error bars represent the standard deviation of the measurements.
Expression lifespan
S30 Expression Lifespan.JPG
Graph 5. Graph of rate of GFPmut3b synthesis (pmol per min) against time (minutes) at 8oC (dark blue), 15oC (pink), 20oC (yellow) and 30oC (light blue). The simple constitutive gene expression device BBa_I13522 has been used. Each of the four coloured lines show average measurements based on three replicates of the experiment. The error bars represent the standard deviation of the measurements.
Expression capacity
S30 Expression Capacity.JPG
Graph 6. Bar chart showing total GFPmut3b synthesized in 6 hours (pmol) at 8oC (dark blue), 15oC (pink), 20oC (yellow) and 30oC (light blue). The simple constitutive gene expression device BBa_I13522 has been used. Each of the four coloured bars show average measurements based on three replicates of the experiment. The error bars represent the standard deviation of the measurements.


References

Please refer to the Promega cell extract user guide for detailed information about the Commercial E. coli S30 extract.