Protocol
1:miniprep
- ・We took plasmid out of Escherichia coli which have a gene of IL-10 α and IL-10 β and STAT3 in miniprep to use it by a following experiment (the Escherichia coli which I really used in an experiment of 2013).
DNA of HlyA and the GFP are IGEM 2014 kit plate1 21G and IGEM 2014 kit plate 13L, so we didn't miniplep
- 1) We cultured bacterial strain with the LB medium which I added ampicillin to so that density becomes 100ug/ml overnight.(We made a nutrient medium of around 5 ml in 50 ml falcons)(Against 5 ml of nutrient mediums, Amp used 5ul)
- 2) Aliquot 1ml culture into a 1.5 ml microcentrifuge tube,and Made it spin at 10000rpm (4℃) for 1 min to harvest the bacteria.
- 3) Removed supernatant and performed 2)operation again, Removed supernatant .
- 4) Resuspended bacterial pellet by complete vortexing in 100ul SolutionⅠ{D-glucose:9g(50mM),1M Tris-HCl(pH 8.0):25ml(25mM),0.5M EDTA:20ml(10mM),H2O:955ml /1L}.
- 5) Inverted bacterial pellet by complete fall mixtureing in 200ul SolutionⅡ{NaOH:8g,SDS:10g[1%(w/v)],H2O:960ml /1L},and confirmed that it became transparent.
- 6) Cooled for three minutes in ice.
- 7) Inverted bacterial pellet by complete fall mixtureing in 150ul SolutionⅢ{CH3COOH:294.5g(3M),CH3COOH:120ml(2M),H2O:diluting in measuring cylinder to 1L total},and confirmed that it became Cloudiness.
- 8) Cooled for 3 minutes in ice.
- 9) Harvested the DNA by spinning at 10000rpm (4℃) for 10 min.
- 10) Gathered only supernatant and moved it in a new microcentrifuge tube.
- 11) Added 0.8ul Rnase(10mg/ml) and incubate the solution(37℃,1min)
- 12) Added 200ul phenol:chloroform(1:1) and inverted
- 13) Harvested by spinning at 10000rpm (4℃) for 5 min.
- 14) Removed only supernatant and moved it in a new microcentrifuge tube, after that tapped in 200ul chloroform.
- 15) Harvested by spinning at 10000rpm (4℃) for 1 min.
- 16) Moved its supernatant to a new microcentrifuge tube and add 15ul 3M CH3COONa.(Don't gather underlayer)(The ratio of the 3M sodium acetate and supernatant is made to be 10:1)
- 17) Added 400ul 100%CH3CH2OH and made it stirred well.
- 18) Harvested by spinning at 10000rpm (4℃) for 20 min.
- 19) Removed only supernatant and added 400ul 70%CH3CH2OH(pour a liquid from the other side for white thing not to drain a white.[white thing is plasmid])
- 20) Harvested by spinning at 10000rpm (4℃) for 20 min.
- 21) Removed only supernatant and opened the cover of the tube for 10min to dry CH3CH2OH.
- 22) Added 50ul TE to dissolve DNA
- 23) We stored low temperature
2:PCR
- ・We performed PCR to confirm whether DNA which we need.
- 1)We diluted the primer.(D2W:primer=4:1)
- 2)Made PCR preparation liquid {buffer×10:2.5ul,dNTP:2ul,PrimerF:1ul,PrimerR:1ul,Taq Polumerase:0.1ul,D2W:17.39ul /1 microcentrifuge tube(0.2ml)}
- 3)Added sample(there are Plasmid made with miniprep)to the microcentrifuge tube and do PCR(The PCR conditions are as follows).
- 4)We did Electrophoresis to confirm Objective band.
3:Restriction enzyme processing
- ・We did restriction enzyme processing to plasmid to incorporate inserts in a plasmid vector.
- Figure②:Used Restriction enzyme
-
- HlyA・・・We removed the stop codon
- F chain ・・・This has EcoR1 recognition sequence.We added CG and A to this to prevent flame out.
- ・5'-CGGAATTCATTAGCCTATGGAAGTCAGGG-3'
- ((Tm before adding a restriction enzyme site =60℃
- ((GC before adding a restriction enzyme site =50.0%
- R chain ・・・This has HindⅢ recognition sequence.We added CCC to this.
- ・5'-CCCAAGCTTTGCTGATGTGGTCAGGGTTA-3'
- ((Tm before adding a restriction enzyme site =60℃
- ((GC before adding a restriction enzyme site =50.0%
- GFP
- F chain ・・・This has HindⅢ recognition sequence.We added CCC and A to this to prevent flame out.
- ・5'-CCCAAGCTTAATGCGTAAAGGAGAAGAACT-3'
- ((Tm before adding a restriction enzyme site =56℃
- ((GC before adding a restriction enzyme site =40.0%
- R chain ・・・This has Pst1 recognition sequence.We added AA to this.
- ・5'-AACTGCAGTTATTATTTGTATAGTTCATCC-3'
- ((Tm before adding a restriction enzyme site =54℃
- ((GC before adding a restriction enzyme site =22.7%
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- Figure③:Rough plan
- 1)We set a heat block(37℃).
- 2)prepare one microtube.
- 3)added 1ul restriction enzyme buffer(×10) to microtube
- 4)added 1ul DNA sample liquid to the microtube
- 5)added 1ul each restriction enzyme to the microtube
- 6)added D2W until it became 10ul
- 7)set microtube to a heat block (37℃)
- 8)left the microtue more than one hour to push forward a reaction
4:Ligation
- 1)set the temperature of the heat block.
- 2)prepared one microtube.
- 3)added 2ul PCR product (insert DNA) to the microtube.
- 4)added 1ul Plasmid vector (did with restriction enzyme) to the microtube.
- 5)added 5ul DNA ligase to the microtube.
- 6)added 5ul Sterilization water to the microtube and closed the cap
- 7)set the microtube to heat block.
- 8)put it for several hours.
- 9)after 8),saved it in -20℃.
5:Transformation
- 1)We set a water bus(42℃) and a heat block(37℃).
- 2)added 280ul LB media to empty microtube and set to heat block.
- 3)added plasmid(1ul or 2ul) to microtube which has 10ul competent cell.
- 4)Did tap.
- 5)left this microtube on ice for 15 minutes.
- 6)did heat shock with a water bus for 45 seconds.
- 7)brought it to ice quickly and left on ice for 2 min.
- 8)added 250ul LB media to this.
- 9)cultured it at 37 ℃ for one hour
- 10)applied to LB agar nutrient medium about 20ul arabinose (200 mg/ml) and 20ul ampicillin (100 mg/ml) While I culture it.
- 11)After 9),we added 125ul Bacteria liquid (we cultured in 9)) to LB agar nutrient medium (we made in 10)).
6:DNA purification
- 1)From the gel which did electrophoresis, I cut and bring down an objective DNA band.
- 2)moved the gel which I cut and brought down to microtube.
- 3)added 500ul buffer QG to the microtube.
- 4)incubated it for 10min.(50℃)
- 5)moved liquid of 4) to QIA quick colum.
- 6)Centrifugal separation(10000rpm, 2 min)
- 7)discarded the liquid which collected at the bottom of QIA quick colum.
- 8)Centrifugal separation(10000rpm, 1 min)
- 9)added 750ul buffer PE to the QIA quick colum and put this about 2 min.
- 10)Centrifugal separation(10000rpm, 2 min)
- 11)repeated 9)~10) 2~3 times.
- 12)discarded the liquid which collected at the bottom of QIA quick colum.
- 13)Centrifugal separation(10000rpm, 4 min)
- 14)discarded the liquid which collected at the bottom of QIA quick colum.
- 15)put the QIA quick colum which disintegrated on the new microtube.
- 16)added 50ul buffer EB to the QIA quick colum and put about 5 min.
- 17)Centrifugal separation(10000rpm, 2 min)
- 18)Objective DNA is in the bottom of the microtube.
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