Team:NYC Wetware/Notebook/Week12

From 2011.igem.org

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Verified successful E. coli biobrick transformants and prepared them for Sanger sequencing. New colonies were inoculated from the unsuccessful transformations.
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8/8/2011<br/>
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Inoculated T. cruzi and pSB1A10 with RBSs transformations.<br/>
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Looking to clone RBS into plasmid pSB1A10 which contain RFP. Transformed pSB1A10 from initial distribution. <br/>
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8/9/2011<br/>
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Ran PCR with newly extracted D. rad DNA. Hopeful for success.<br/>
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Successful transformation with multiple red colonies. Inoculated pSB1A10. <br/>
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8/10/2011<br/>
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Sent successful E. coli biobrick samples for Sanger sequencing. <br/>
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Miniprepped pSB1A10. Digested and ligated RBS's B0030 and B0034 into pSB1A10. Looking to transform tomorrow.<br/>
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8/12/2011<br/>
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Mini-prepped second inoculations from unsuccessful transformations.
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Transformed new screening plasmid, pSB1A10, with the RBSs ligated.
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Attempted new DNA extraction technique on D. rad to obtain enough DNA to run successful PCRs. Nanodrop results to follow.
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Transformed two T. cruzi radioresistance genes. Hopefully, the same radioresistance that the plant enjoys can be conferred on E. coli through biobricks. <br/>
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Ran PCR with new D. rad DNA. Continues to be unsuccessful. We will attempt a new method of extracting D. rad DNA.  
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Received Sanger sequencing results back for our transformed E. coli biobrick samples. Multiple successful gene insertions! Transformed the unsuccessful one again in hopes of obtaining a colony with our inserted radioresistant gene.
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Looking to verify that RBS's successfully ligated into pSB1A10 before we add in our successful biobricks. Digested plasmids with EcoR1 and Pst1. Will run a 2% gel and low voltage to attempt to see the 15bp RBS's with their overhangs on the gel.  
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Identification of RBS on the 2% gel unsuccessful.  
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Ran PCR and gel to verify E. coli biobrick transformants. Verification primers amplify gene insertion plus ~100 bp in either direction. Samples whose lengths match expected sizes are sent for Sager sequencing.<br/>
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Preparing glycerol stocks of all strains that were successfully transformed with verified biobricks. <br/>
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Growing up large quantities of plasmid containing RBS so we can insert a promoter upstream and our gene of interest downstream. <br/>
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Also trying to use primers that amplify only the biobrick region of the plasmid, to try to avoid the need to grow up large colonies for every part - if we can amplify just the biobrick region we will be able to ligate the pieces we need directly into the plasmid (containing RBS and and promoter). <br/>
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We will also be biobricking a promoter + RBS part; a brick we think will be of major use for future iGEM teams. Hard to believe the parts catalog doesn't already offer one. Anyway, having this part will enable teams to test genes as soon as they the can successfully amplify them and add the biobrick prefix and suffix. Using the promoter + RBS plasmid as the screening plasmid will mean that transformants will be expressing the gene of interest right away.<br/>

Latest revision as of 03:24, 28 September 2011