Team:HokkaidoU Japan/Notebook/aggregation Week 7

ligation

We ligated pBad-RBS on pSB1A3 (digested Spe1) as vector and Ag43-dT (digested Spe1 and Xba1 and HindIII) as insert.

Ligation reaction time was written below.

Transformation

Transformation of plasmid DNA ligation product (pT7-RBS-Ag43-dT on pSB1K3) into DH5α.

1. Added 2 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
2. Incubated on ice for 30min.
3. Added 350 ul of LB.
4. Prepared and Labeled two petri dishes with LBA.
5. Plate 300 ul of the transformation onto first dish and spread.
6. Added 450 ul of LB to 50 ul of the transformation and plated 300 ul of it onto second dish and spread.
7. Incubated the plates at 37C for hours.

Digestion

Ag43-dT on pSB1AK3 digestion with SpeI and XbaI.
Ag43-dT, SpeI and XbaI

pBad-RBS on pSB1A3 electrophoresis result

digestion result

Gel extraction

Gel extraction for digestion product. We used FastGene Gel&PCR extraction kit(NipponGenetics)and got 50 ul of DNA solution.

Colony PCR

Colony PCR to confirm that whether the Ag43-dT was successfully ligated with pBAD-RBS on pSB1A3 or not.

Cycle:2~4 x 35

We used N1 (DW only) and N2 (Ag43-dt on pSB1K3) as controls. Desired product is about 800~1000bp.

Colony PCR result

From this result, N2 has about 500bp band. We use to liquid culture, No. 7,10,12.
We cultured these DNA in E. coli solution, after added 200 ul LB, at 37C for 3 hrs. Next step, we resuspended these 5 colonies and cultured (add 1800 ul LB and 2 ul Amp) for hours at 37C.

Transformation

Transformation of BBa_I13453 (pBAD on pSB1A3) into DH5α.

1. Added 1 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
2. Incubated on ice for 30 min.
3. Added 350 ul of LB.
4. Prepared and Labeled two petri dishes with LBK.
5. Plate 300 ul of the transformation onto first dish and spread.
6. Added 450 ul of LB to 50 ul of the transformation and plated 300 ul of it onto second dish and spread.
7. Incubated the plates at 37C for 19 hours.

Digestion

From sequencing results, we found that we failed to make pT7-RBS on pSB1K3.
So, we tried to make it again.
When the restriction enzyme digest the DNA, it is important for 3A assembry to be digested the target plasmid completely. So, we activated the restriction enzymes for 10 hours.

pT7 (BBa_I719005) EcoRI/SpeI

RBS (BBa_B0034) XbaI/PstI

pSB1C3 EcoRI/PstI

Ethanol precipitation

Ethanol precipitation for three digestion products.

1. Added 2 ul of NaoAc, 1.5 ul of glycogen and 50 ul of 100% ethanol.
2. Centrifuged at 14000 rpm, 30 min at 4C.
3. Removed supernatant and added 220 ul of 70% ethanol.
4. Centrifuged at 15000 rpm, 15 min at 4C.
5. Removed supernatant and dried out at room temperature, after that added 10 ul of DW.

Gel extraction

Before digestion of pBAD-RBS on pSB1A3 and Ag43-dT on pSB1AK3, it is necessary to refine these two DNA. We used FastGene Gel&PCR extraction kit(NipponGenetics)and got 20 ul of DNA solution from 10 ul of plasmid extraction products.

Digestion

Digested pBAD-RBS on pSB1A3 as insert and Ag43-dT on pSB1AK3 as vector with EcoRI and SpeI to make a constract, pBAD-RBS-Ag43-dT on pSB1AK3.

pBAD-RBS
EcoRI/SpeI

Ag43-dT on pSB1AK3
EcoRI/XbaI

Digestion result

Gel extraction

Gel extraction for digestion product. We used FastGene Gel&PCR extraction kit(NipponGenetics)and got 50 ul of DNA solution.

Ethanol precipitation

Ethanol precipitation for digestion products.

1. Added 5 ul of NaoAc, 1.5 ul of glycogen and 125 ul of 100% ethanol.
2. Centrifuged at 15000 rpm, 10 min at 4C.
3. Removed supernatant and added 220 ul of 70% ethanol.
4. Centrifuged at 15000 rpm, 5 min at 4C.
5. Removed supernatant and dried out at room temperature, after that added 10 ul of DW.

Plasmid extraction

Plasmid extraction for colony number of No. 10 and 12 of pBAD-RBS-Ag43-dT. We used FastGene Plasmid Mini Kit(Nippon Genetics) and got 50 ul of DNA solutions.

plasmid extraction result

Ligation

Ligation for pT7 and RBS as inserts and pSB1C3 as vector.

Transformation

Transformation of ligation product (two construct ligated at August 18) into DH5α.
pT7-RBS on pSB1C3

1. Added 2 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
2. Incubated on ice for 30min.
3. Added 350 ul of LB.
4. Incubated at 37C for 2 hours.
5. Prepared and Labeled two petri dishes with LBC.
6. Plate 300 ul of the transformation onto first dish and spread.
7. Added 450 ul of LB to 50 ul of the transformation and plated 300 ul of it onto second dish and spread.
8. Incubated the plates at 37C for 18 hours.

pBAD-RBS-Ag43-dT on pSB1AK3

1. Added 2 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
2. Incubated on ice for 30min.
3. Added 350 ul of LBK.
4. Incubated at 37C for 2 hours.
5. Prepared and Labeled two petri dishes with LBK.
6. Plate 300 ul of the transformation onto first dish and spread.
7. Added 450 ul of LB to 50 ul of the transformation and plated 300 ul of it onto second dish and spread.
8. Incubated the plates at 37C for 16 hours and 30 minutes.

PCR

PCR for pT7-RBS on pSB1K3. By sequencing reaction, we found the No. 10 plasmid is not pT7-RBS on pSB1K3. We checked the other plasmid is the same or not.

Cycle:2~3 x 45

PCR result

No. 4 plasmid has independent bands. However, if it is pT7-RBS on pSB1K3, it has about 60~70bp band.