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Week 01: 3th - 9th June
Monday 3th June
Tuesday 4th June
Wednesday 5th June
Thursday 6th June
Friday 7th June
Week 02: 10th - 16th June
Monday 10th June
Tuesday 11th June
Wednesday 12th June
Thursday 13th June
Friday 14th June
Week 03: 17th - 23th June
Monday 17th June
Tuesday 18th June
Wednesday 19th June
Thursday 20th June
Friday 21th June
Week 04: 24th - 30th June
Monday 24th June
Trojan Horse
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Starting bacterial culture of MG1655-6300 (Chantal’s glycerol).
Streaking 2 Agar plate with it.
Tuesday 25th June
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Choosing a nice colony and launching overnight culture 37° in LB.
Wednesday 26th June
Thursday 27th June
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Making MG1655-6300 competent (edit 28/06: failure).
Friday 28th June
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sRNA design
PICTURE OF THE DESIGN
Red sequences:
pACYCDuet-1 (CmR) : ATATCCAGTGATTTTTTTCTCCAT
pCOLADuet-1 (KanR) : CGTTTCCCGTTGAATATGGCTCAT
We decided that targeting only two different antibiotic resistance will be enough for a proof of concept. We give up AmpR because otherwise they might be experimental issues with AmpR that is also on phagemid litmus28i.
Week 05: 1st - 7th July
Monday 01st July
Drug Screening
Media was made, Strains sD001-sD004 were received, inoculated, and put into stock and catalog.
4 strains were received from Jake:
E. coli: BL21 (DE3) ko20 ΔcysI, Δfpr, ΔydbK
E. coli: NEBTurbo zmSIR Chloramphenicol
E. coli: NEBTurbo zmFNR Spectinomycin
E. coli: NEBTurbo soFD, zmSIR Chloramphenicol
Media and Glycerol stock were prepared:
Media Preparation
3 500ml bottles of LB broth and LB agar were prepared by standard methods. 12.5g/500ml powder/water for broth and 20g/500ml powder/water for agar. Bottles were autoclaved. Additionally 1 flask of 500ml of LB broth was made in the same fashion.
Glycerol Stocks
Single colonies from agar plates were picked and used to innoculate 5ml LB broth overnight. 750ml of overnight culture was added to 250ml of 60% glycerol in a cryotube. Two sets of Glycerol stocks were used for each of sD001, sD002, sD003, sD004; one set was frozen at -20ºC and the other set was frozen at -80ºC.
Phage Sensor
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Tuesday 02st July
Drug Screening
Plasmids were extracted from strains sD002, sD003, sD004
Plasmid Extraction
Plasmids pD004 (pCDF.ew12 zmFNR Spectinomycin), pD005 (pACYC.ew13 soFD, zmSIR Chloramphenicol), pD006 (pACYC.ew17 zmSIR Chloramphenicol) were extracted from NEBTurbo cells using a Thermo Scientific GeneJet Plasmid mini prep kit as described in the protocol (available on google drive). Lacking Resuspention solution we used some from a different mini prep upstairs. Plasmids were eluted in 100ul of nanopure water and frozen at -20ºC. Plasmids were included in catalog.
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Trojan Horse
Glycerol stock was made and cells were transformed.
Glycerol stock
From overnight culture of MG1655-6300 O/N : T001
Centrifuge 4000rpm, 10 minutes,
Take out liquid
Resuspend cells in 1mL glycerol, 2mL LB
Separate in two cryotubes, one for the -80°C, one for the -20°C
Electroporation
Making MG1655-6300 competent using Electroporation protocol
Test of the competent cells (negative
Transforming with pCOLADuet-1
Transforming with pACYCDuet-1
Plating 3 different quantity of cells (20ul, 50uL, 100uL) respectively on Cm and Kan plates (dilution 1000x for the antibiotics)
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Wednesday 03st July
Drug Screening
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Competent Cells : BL21 (DE3) dCysI dFpr dydbk
We grew 5ml of sD001 cells overnight from a single colony.
This 5ml was used to innoculate 500ml of LB broth.
Broth was incubated for 1.5h and optical density was read at 0.62 OD600.
Cells were alloquoted into 10 falcon tubes (50ml each) and centrifuged at 4000xg for 20 minutes at 4C.
Supernatant was removed and cells were resuspended in 200ml of Buffer 1 (4x 50ml) and left on ice for 20 minutes. Cells were centrifuged again for 20 minutes at 4000xg.
Supernatant was removed and cells were resuspended in 12ml Buffer 2.
Cells were alloquoted at 500ul into microcentifuge tubes and frozen at -80C.
Buffer 1: 50mM CaCl2
Buffer 2: 0.53ml 2M CaCl2
2.8ml 60% Glycerol
8.67ml sterile H2O
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Transformation results
Negative controls are negative.
Transformed cells grew on plates.
In the evening launch of 5mL Lb cultures from clones on the plates.
Igem Buffer for chemical competent cells.
Igem protocol for chemical competent cells.
Launch overnight culture of NEB turbo.
5mL LB inoculated with a clone from plate of drug team.
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Thursday 04st July
Drug Screening
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Glycerols of the overnight cultures of the transformation.
sT002 : MG1655 pCOLADuet-1
sT003 : MG1655 pACYCDuet-1
Making stocks of electro competent NEB turbo
Prepare 10% glycerol solution
Put on Ice 1L of Sterile water, 10% glycerol solution and 10 falcon tubes
Cool down centrifuge to 4°C
Prepare a rack with 50 microtubes at -80°C
Making electroconpetent cells stock
Dilute in 500 mL LB (in a 1000mL flask) 500 ul of NEB turbo pre cultured
Check the OD until it reached 0,5
Put 500mL cultures in 10 50mL falcon tubes in ice
Wait for 20 minutes for the culture to cool down
Centrifuge at 3400 rpm 4°C for 10 minutes
Take out liquid and resuspend in 50 mL ice cold water (resuspend content of two tubes in one tube)
Centrifuge 10 minutes, 4°C , 3400 rpm
Take out liquid and resuspend in 25 mL ice cold water
Centrifuge 10 minutes, 4°C, 3400 rpm
Resuspend all the content of the tubes in 20mL ice cold glycerol
Centrifuge 10 minutes, 4°C, 3400rpm
Resuspend in 5mL ice cold 10°C glycerol solution
Aliquot in 50 tubes (100uL per microtubes)
Store at -80°C
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Friday 04st July
Drug Screening
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Week 06: 8th - 14th July
Monday 8th July
Drug Screening
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Trojan Horse
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Attempting to the SB6.
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Tuesday 9th July
Drug Screening
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Attempting to the SB6.
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Wednesday 10th July
Drug Screening
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Attempting to the SB6.
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Thursday 11th July
Drug Screening
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Attempting to NightScience.
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Friday 12th July
Drug Screening
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Week 07: 15th - 21th July
Monday 15th July
Drug Screening
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Primer Design
Design primers to PCR KanR out of Duet and LacZalpha out of pUC18 to then clone them into the DUET containing Chloramphenicol.
Geneious files in the dropbox: LacZ primers, KanR primers.
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Tuesday 16th July
Drug Screening
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Transformation of pUC18 (NEB, NEB CC, BL21)
Thaw competent cells on ice.
Place 20 ul of cells in a pre-chilled Eppendorf tube.
add o.5ul of plasmid to the cells
Mix gently by flicking the tube.
Chill on ice for 10 minutes.
Heat shock at 42 °C for 30 seconds.
Return to ice for 2 minutes.
Add 200 ul LB medium and recover the cells by shaking at 37 °C for 30 min (AmpR)
Plate out the cells (10 ul) on Amp LB plates as well as a control (untransformed cells)
Incubate at 37 °C. Transformants should appear within 12 hrs.
Result: Colonies (around 10)
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Wednesday 17th July
Drug Screening
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Thursday 18th July
Drug Screening
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Friday 19th July
Drug Screening
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Week 08: 22th - 28th July
Monday 22th July
Drug Screening
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Tuesday 23th July
Drug Screening
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Wednesday 24th July
Drug Screening
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Thursday 25th July
Drug Screening
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Friday 26th July
Drug Screening
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Week 09: 29th July - 4th August
Week 10: 5th - 11th August
Week 11: 12th - 18th August
Week 12: 19th - 25th August
Week 13: 26th August - 1st September
Week 14: 2nd - 8th September
Week 15: 9th - 15th September
Week 16: 16th - 22th September
Week 17: 23th - 29th September
Week 18: 30th September - 6th October
Week 19: 7th - 13th October
Week 20: 14th - 20th October
Week 21: 21th - 27th October
Week 22: 28th October - 3th November