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Team:Imperial College London/M3/Modelling
From 2009.igem.org
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<!--Dam methylase works by transferring a methyl group to the N6 position of the adenine residues in the sequence GATC[[http://www.neb.com/nebecomm/tech_reference/restriction_enzymes/dam_dcm_cpg_methylation.asp 3]]. As a result, restriction enzymes cannot recognise their intended cleavage site. This means that DNA will not be cleaved in the presence of Dam methylase and E. coli cells will not die. As it competes with restriction enzymes for DNA, at low restriction enzymes concentrations, Dam methylase will be able to methylate DNA and protect it. However, as the concentration of restriction enzymes increase at higher temperatures, the amount of constitutively produced Dam methylase will no longer be sufficient to protect against cell death, and cell killing occurs.--> | <!--Dam methylase works by transferring a methyl group to the N6 position of the adenine residues in the sequence GATC[[http://www.neb.com/nebecomm/tech_reference/restriction_enzymes/dam_dcm_cpg_methylation.asp 3]]. As a result, restriction enzymes cannot recognise their intended cleavage site. This means that DNA will not be cleaved in the presence of Dam methylase and E. coli cells will not die. As it competes with restriction enzymes for DNA, at low restriction enzymes concentrations, Dam methylase will be able to methylate DNA and protect it. However, as the concentration of restriction enzymes increase at higher temperatures, the amount of constitutively produced Dam methylase will no longer be sufficient to protect against cell death, and cell killing occurs.--> | ||
| - | = | + | =Model for cell death= |
| + | ==Our goals== | ||
We aim to: | We aim to: | ||
Revision as of 00:36, 15 September 2009
Background
This module is concerned with killing the E. coli bacteria after successful drug protein production and encapsulation. Killing will be activated by an increase in temperatures from 28°C to 42°C.
Model for cell death
Our goals
We aim to:
- Explore how temperature correlates to restriction enzyme concentration, and see how it affects the population of live cells, so as to characterise the effects of temperature on cell death.
- Develop a model of the number of dead cells as this correlates to our live and dead cells assay. (hyperlink to assay). From this, we can monitor the rate of killing and perform data analysis to obtain the necessary parameters.
In summary, our model will allow us to characterise the effects of temperature on the parallel production of restriction enzymes DpnII and TaqI, that are required to kill E. coli. We can also characterise the extent Dam methylase can protect E. coli against cell death. (not yet done)
<biblio>
- 1 pmid=15652426
- 2 pmid=10235623
</biblio>
