Part:BBa_K644001:Experience
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UNIQ4ca17f7842755ed9-partinfo-00000000-QINU UNIQ4ca17f7842755ed9-partinfo-00000001-QINU
UCSF iGEM 2015
Eleanor Amidei
Our project this year included a clustering element, so we looked at Mgfp-5, Hwp1, and E. Cadherin. We began by testing them by using the parameters UCSF 2011 laid out. What we found was that everything clustered after 24 hours, indicating that maybe it was more about population density than actual clustering. We tested the clustering protein at different population densities to test this theory. Higher densities clustered more easily than lower density cultures. We then transformed them into our own strain of yeast, CB008BD, a knockout strain without Bar 1. We again followed similar parameters to UCSF 2011 but included a CB008DB strain as a control. Again, we found that after 24 hours, everything began to cluster, including CB008DB without a clustering gene.
We placed this gene downstream of a transcription factor inducible promoter, which yielded increased cluster size
HWP1 did not need an additional inducer according to the UCSF 2011 team, only galactose because of the galactose inducible promoter.
Base Procedure: 1. Grow strains in 1% S-Raffinose 2. Transfer to 2% S-Galactose (Used 1% before like UCSF 2011, but after doing some research, discovered 2% was more effective.) 2.5 Dilute to desired OD (LD - .001 HD - .1, our project experiment - 0.015) 4. Take time points (they vary 0,2,4,6,8,24 or 0,1.5, 3, 6, 8, 24) 5. Microscopy!
- We followed the guidelines set by UCSF 2011 but altered them to be more optimized for our specific project. The concentrations/procedure listed above are what we used generally throughout our preliminary testing phase, but it varied a bit from experiment to experiment.
