Team:TUDelft/Color testing

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The ultimate proof of principle would obviously be a colored E.coli colony. However, we are looking into ways to obtain evidence for individual working enzymes. This would be convenient for us in case of a negative result, as we would like to know where along the pathway it goes wrong. Furthermore, some enzymatic assays could yield parameters for the modeling guys.  
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=Color pathway testing=
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===Correct genes testing===
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The first indication of whether obtaining of the genes was a succes, is the correct size of DNA product on a gel. DNA sequencing will provide final certainty of the correct genes.  
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What kind of enzymatic assays could be used is now a topic of investigation.
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===Correct activity testing===
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The ultimate proof of activity of the pathway would obviously be a colored ''Escherichia coli'' colony. However, to identify individual working enzymes, we'd need specific enzymatic assays. Furthermore this is useful, as some enzymatic assays could yield parameters for the modeling guys. Due to a lack of time, we've not looked any further into these assays.
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==Results==
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The first gradient PCR have been performed on the genes, the ''E. coli'' genes all worked correctly (see lab notebook entry of [https://2008.igem.org/TUDelft/19_August_2008 August 19th]), while still some work has to be done on the ''S. cerevisiae'' primers ([https://2008.igem.org/TUDelft/20_August_2008 August 20th]). The next step will be to PCR the ''E. coli'' genes again, with the ideal annealing temperature, using ''Pfx'' polymerase instead of ''Taq''. The ''Pfx'' enzyme has proofreading and so is less likely to make a mistake within the genes. The gradient PCR on ''S. cerevisiae'' cDNA will be repeated and optimized.
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Revision as of 14:48, 29 October 2008

Contents

Color pathway testing

Correct genes testing

The first indication of whether obtaining of the genes was a succes, is the correct size of DNA product on a gel. DNA sequencing will provide final certainty of the correct genes.

Correct activity testing

The ultimate proof of activity of the pathway would obviously be a colored Escherichia coli colony. However, to identify individual working enzymes, we'd need specific enzymatic assays. Furthermore this is useful, as some enzymatic assays could yield parameters for the modeling guys. Due to a lack of time, we've not looked any further into these assays.

Results

The first gradient PCR have been performed on the genes, the E. coli genes all worked correctly (see lab notebook entry of August 19th), while still some work has to be done on the S. cerevisiae primers (August 20th). The next step will be to PCR the E. coli genes again, with the ideal annealing temperature, using Pfx polymerase instead of Taq. The Pfx enzyme has proofreading and so is less likely to make a mistake within the genes. The gradient PCR on S. cerevisiae cDNA will be repeated and optimized.