Tetrodotoxin Production in E.coli Using FLP Genes from Pufferfish By: Brett Fuller Chase Meusel Holly Tjaden.

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Tetrodotoxin Production in E.coli Using FLP Genes from Pufferfish By: Brett Fuller Chase Meusel Holly Tjaden

Goals 1. To Isolate tetrodotoxin genes (FLP) from the pufferfish. 2. Isolate an orange fluorescence gene from biobrick BBa_K Combine the FLP gene with the biobrick gene using the biobrick restriction sites. 4. Insert the combine FLP gene into a plasmid and replicate the gene- containing plasmid in E. coli. 5. Test whether the genes were successfully replicated by exposing the bacteria to UV radiation.

Back-up Plans  FLP is a conglomerate of three different FLP genes.  If the larger of the three genes does not work, we can isolate the other two and test them as well.

Procedure  1. Obtain live puffer fish specimen and extract the total genomic DNA from fin tissue using a kit from Dr. Berendzen.  2. Design primers to amplify the three FLP genes identified as well as a gene for orange fluorescence to confirm that the FLP genes should be getting expressed. These primers should also contain the restriction site ends that are required for biobrick usage.  3. Amplify all three FLP genes using PCR from the total genomic DNA isolated from the puffer fish tissue.  4. Amplify the orange fluorescence gene (BBa_K152005) from the biobrick plasmid using the provided procedure.  5. Ligate the orange fluorescence gene and one or more of the FLP genes.  6. Ligate the combined genes into a plasmid and transfer the plasmid into the bacteria, E. coli.  7. Allow the bacteria to grow up and plate them on selective LB media with ampicillin.  8. Test bacterial colonies for fluorescence using UV radiation.

Part and Sequence Details  Primer details:  FLP1-F = E-X-ATTCGACACCCAGCAGGGAAG  FLP1-R = CACGAGTATTTATTAGATCA-S-P  FLP2,3-F = E-X-GGAAGATGGAGCGAGTGACT  FLP2-R = ACGGTGCCATATCTGATAGG-S-P  FLP3-R = GGGAGTCTTTAGTGTTTATT-S-P

How will we test it?  In order to ensure that our plasmid is in the bacteria, we will plate it on media with ampicillin (or whatever the plasmid carries a resistance to).  If the bacteria grows, we will expose the bacteria to UV radiation. If it glows, we know that the plasmid is in the bacteria.  Or eat it?! Puffer Fish Dining Video from National Geographic