Team:CityU HK/notebook/lablog 3
From 2014.igem.org
Desaturase Module's Lablog
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Late JulyOpen or Close
Week 3 (13/7~19/7)
- Miniprep: extracted plasmids containing Δ9, Δ12 and Δ15 genes
- Restriction cut at XbaI and PstI sites of each type of extracted plasmids
Week 5 (27/7~31/7)
- Restriction cut at XbaI and SpeI for promoter R0010 from plasmid pSB1C3
->no band with matching size of promoter showed after running gel- Restriction cut at XbaI and PstI forΔ9, Δ12 andΔ15 genes
- Restriction cut at XbaI and PstI on plasmid pSB1C3
- Ligation of each gene into each pSB1C3 plasmid
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August - Week 1 & 2(3/8~16/8)Open or Close
- Transformation of suspected-to-be modified plasmids into E.coli (DH5αK12 strain)
- Check clone by colony PCR and gel electrophoresis
-> Three times of gel electrophoreses were carried
-> The results were not desired, either no band in gel photo or incorrect sizes of band- Primer design for colony PCR & sequencing
-> The first designed primers were based on the original iGEM primers, i.e. VF2 and VR, but with extended annealing sequences. They were used for sequencing
-> The second designed primers included more annealing sequences and also RBS sequence. They would be used as the other approach if the processing transformed plasmids did not really have inserts- Extraction of plasmids containing RBS B0030 and Δ9, Δ12 andΔ15 genes with RBS sequences
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August - Week 3 (17/8~23/8)Open or Close
- Repeated restriction cut at XbaI and PstI sites of gene carrying plasmids
- ligation of genes to PSB1C3 with XbaI and PstI sites cut and transformation with newly extracted genes
- Colonies picked for further clone check with three types of primers, including the original iGEM primers and two newly designed primers
-> The transformed bacteria seemed to have target inserts after running gel- Sequencing of the transformed bacteria
-> all sequences matched as expected- Miniprep of the extracted plasmids with Δ9, Δ12 andΔ15 genes in pSB1C3 plasmids
- Restriction digestion at SpeI and PstI sites ofΔ9 gene containing plasmids, XbaI and PstU sites ofΔ12, Δ15 gene containing plasmids
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August - Week 4 (24/8~30/8)Open or Close
- Gel electrophoresis in order to collectΔ9 gene containing plasmids, Δ12 and Δ15 genes
- Gel purification of the collected products
- Ligation of Δ9 gene containing plasmids andΔ12 gene insert
- Transformation of suspected-to-be modified plasmids into E.coli (DH5αK12 strain)
- Clone check by PCR and gel electrophoresis to see if grown bacteria contained Δ9 and Δ12 genes or not
-> Result matched, transformation was sucessful