Team:HokkaidoU Japan/Notebook/aggregation Week 5

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Contents

July 30th

digestion

I tried to digest the mini-prep products again, and after Ethanol precipitation, we did electrophoresis.

digestion result

transformation

I think that the E. coli which we use transformation is BL21(DE3)pLysS. So, the E. coli could multiplication increase on LBC plate.
I'm going to do transformation , use DH5α. Transformation of plasmid DNA ligated in 25th (pT7-RBS-Ag43-dT on pSB1K3) in E. coli(DH5α).

  1. Added 2 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
  2. Incubated on ice for 30 min.
  3. Added 200 ul of LB then incubated the cells for 2 hours at 37C.
  4. Prepared and Labeled two petri dishes with LBK.
  5. Plate 200 ul of the transformation onto first dish and spread.
  6. Added 450 ul of LB to 50 ul of the transformation and plated 200ul of it onto second dish and spread.
  7. Incubated the plates at 37C for 14 hours.


July 31th

liquid culture

Liquid culture for pT7-RBS-Ag43-dT on pSB1K3.

  1. Added 2 ml of LBK into culture tubes.
  2. Resuspended colonies.
  3. Incubated the tubes at 37C for


August 1st

mini-prep

mini-prep of pT7-RBS-Ag43-dT which had been cultivated from yesterday. We used FastGene Plasmid Mini Kit(Nippon Genetics) and got 50 ul of DNA solutions.

mini-prep result

Digestion

pT7-RBS(20 ng/ul) =⑨ SpeI 10xH

DNA solution 4.5 ul
SpeI 1 ul
10xH buffer 1 ul
DW 3.5 ul
Total 10 ul

SpeI 10xM

DNA solution 4.5 ul
SpeI 1 ul
10xM buffer 1 ul
DW 3.5 ul
Total 10 ul


pT7-RBS(30 ng/ul) =⑩

SpeI 10xH

DNA solution 3 ul
SpeI 1 ul
10xH buffer 1 ul
DW 5 ul
Total 10 ul

SpeI 10xM

DNA solution 3 ul
SpeI 1 ul
10xM buffer 1 ul
DW 5 ul
Total 10 ul
digestion result

We couldn't cut them exactry so we cut once more time.

pT7-RBS(20 ng/ul) =⑨ SpeI 10xH

DNA solution 4.5 ul
SpeI 1 ul
10xM buffer 2 ul
DW 12.5 ul
Total 20 ul

Liquid culture

Liquid culture for pBAD-RBS on pSB1K3.

  1. Added 2 ml of LBK into culture tube.
  2. Scraped the surface of glycerol stock of construct.
  3. Incubated the tube at 33C.


August 2nd

Preparing chemical competent cell

Preparing chemical competent cell of BL21, JM109 and DH5α. Chemical competent cell made in each E. coli strains.

Our competent cell Protocol

  1. Single colony isolation on LB plate
  2. incubated the plate for 15-19 hours at 37℃
  3. lift colony of E. coli into 2 ml LB
  4. cultured cells at 37℃ for 12-16 hours at 180-200 rpm
  5. transfered 30 ul, 100 ul, 300 ul of the culture into 100 ml of LB , respectively
  6. cultured cells at 20℃ (for 24 hours over) at 140 rpm
  7. selected culture by measuring OD 600
  8. left the 300 ml flask for 10 min on ice
  9. transfered the culture into two 50 ml Falcon tube
  10. centrifuged 3000 rpm at 4℃ for 20 min (TOMY LX-120 rotor), and discard sup
  11. suspended the pellet in ice-cold 15 ml of TB (Transformation Buffer)(7.5 ml/tube)
  12. collected them in one tube
  13. centrifuged 3000 rpm at 4℃ for 20 min (TOMY LX-120 rotor), and discard sup
  14. suspended the pellet in ice-cold 3.2 ml of TB
  15. Instiled 0.24 ml of DMSO in precipitant
  16. left the 50 ml Falcon tube for 10 min on ice
  17. divide 50ul of solutions in each 0.5 ml tubes
  18. Freezed the suspension in liquid nitrogen
  19. stored at –80℃


Electrophoresis

Electrophoresis of digestion result of yesterday(pT7-RBS on pSB1K3 cut with SpeI)

Electrophoresis result

There were low concentration band in above of thin band. This thin band was same as digestion minus band.

Digestion

Digestion of pT7-RBS on pSB1K3(more fresh one)

DNA solution 4 ul
SpeI 1 ul
10xM buffer 2 ul
DW 13 ul
Total 20 ul


August 3rd

Electrophoresis

Electrophoresis for the result of digestion(see the yesterday notebook).

Electrophoresis result

Gel extraction

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

Ethanol precipitation

Ethanol precipitation for digestion and gel extraction product.

  1. Added 5ul of NaoAc, 1.5 ul of glycogen and 125ul of 100% ethanol.
  2. Centrifuged in 15000 rpm, 10 min at 4C.
  3. Remove supernatant and added 220ul of 70% ethanol.
  4. Centrifuged in 15000 rpm, 5 min at 4C.
  5. Remove supernatant and air drying in room temperature then added 10 ul of DW.

Ligation

We ligated pT7-RBS on pSB1K3 (digested Spe1) as vector and Ag43-dT (digested Spe1 and Xba1 and HindIII) as insert.

pT7-RBS 2 ul
Ag43-dT 4 ul
Ligation Mighty Mix(TAKARA) 6 ul
Total 12 ul


Ligation reaction time was written below.

Degree Minute
16 30
65 10
4 Hold

Transformation

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

  1. Added 1ul of plasmid DNA to 50ul of thawed competent cells on ice.
  2. Incubated on ice for 30min.
  3. Added 600ul of LB then incubated the cells for 2 hrs at 37C.
  4. Prepared and Labeled two petri dishes with LBK.
  5. Plate 300ul of the transformation onto first dish and spread.
  6. Added 900ul of LB to 100ul of the transformation and plated 300ul of it onto second dish and spread.
  7. Incubated the plates at 37C for OOhrs.

PCR

PCR to confirm Ag43-f4 primer.

DNA solution 1ul
KOD-Plus-NEO(Taq polymerase) 1ul
dNTP 5ul
MgSO4 3ul
KOD-Plus-NEO Buffer 5ul
Forward Primer(Ag43-f4 primer) 1ul
Reverse Primer(PS-R primer) 1ul
DW 33ul
Total 50ul


Number Degree Second
1 94 120
2 98 10
3 58 30
4 68 60
5 4 HOLD

Cycle:2~4 x 45


PCR result

In this result, we could see that the ag43-f4 primer had worked and DNA of last 500~600 bp of ag43 to BioBrick suffix were amplified.



August 4th

Colony PCR

Colony PCR to confirm that whether the Ag43-dT was successfully ligated with pT7-RBS on pSB1K3 or not.

DNA solution 4ul
Kapa-Taq(Taq polymerase) 5ul
Forward Primer(Ag43-f4 primer) 0.5ul
Reverse Primer(PS-R primer) 0.5ul
Total 10ul


Number Degree Second
1 95 120
2 95 30
3 58 30
4 72 60
5 72 60
6 4 HOLD

Cycle:2~4 x 35