Team:TorontoMaRSDiscovery/Notebook
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April 27, 2009
- Received from Rosa (SPiT):
- TM0785
- Plasmid containing encapsulin
- Recommend transfect into bacteria and re-sequence
- See email note regarding sequence error
- 0.5 microliters TMG DNA 100 microgram/microliter
- Use 0.4 microliter for 50 microliter PCR reaction =August 1, 2009=
- TM0785
- Overnight encapsulin cultures 1 and 6 (randomly selected) and the negative control were miniprepped
- The rest of the encapsulin cultures were stocked with 20% glycerol
- 6 digestions were done: Enc1, Enc6, Enc -ve, BB5, BB7, and C
- 16ul of BB5 plasmid was used
- 500ng of plasmid were used for the others
- The digestions were run on a 1.3% agarose gel in TAE (from here on, unless otherwise specified, all gels were 1.3% agarose)
- BB5 was confirmed and all other parts were correct as well
- Overnight ligation of 7+Enc in the PCR machine
May 15, 2009
- pH buffers received from VWR Mississauga
- pH 4 buffer (red) 500 ml
- pH 7 buffer (yellow) 500 ml
- pH 10 buffer (blue) 500 ml
Above are used for pH/mV Meter calibration
- pH/mV meter calibrated according to manual – recorded in index
- Ethanol solution (70%) made from 85% ethanol
May 19, 2009
- 2L of TE buffer made (10X TE)
- Recipe for 2L from stock solution (10X TE)
- a) 10 ml 1M Tris-HCl pH 7.5-80.0 x 2 = 20 ml
- b) 2 ml 0.5 M EDTA pH 8.0 x 2 = 4 ml
- c) 988 ml ddH20 x 2 = 1976 ml
- To make Tris-HCl, Tris base is used and adjusted to desired pH using HCl
- 1 M Tris base is required of which 20 ml is required – thereby 2.4228 g Tris base (due to scale limitations, 2.42g of Tris Base was used
- Recipe for 2L from stock solution (10X TE)
- 500 ml of 1 M Tris Base made
- mass of Tris used = 1M/1000 ml x 500 ml x 121.14 g/mol = 60.57 g
- volume of water used = 500 ml
- 250 ml of 0.5 M EDTA solution was made
- mass of EDTA used = 36.53 g
- observations: EDTA did not dissolve in ddH2O on heat and being stirred
May 21, 2009
- Retrieved autoclaved ddH20, glycerol solution
- Gel Electrophoresis (test run)
- 1% gel: 0.5 g agar mixed with 50 ml of 1X TBE
- 10X TBE diluted with 5 ml TBE + 45 ml ddH20 – did not use all 50 ml for 1 gel (gel will be too thick – make 2 instead)
- Loading Dye: add glycerol solution to 25 mg bromophenol blue then add dH20 to 10 ml (to make 6X)
- Running gel: match wells to black side, run at 120 mA
- Visualize Gel in UV
- Turn power on
- Gel in machine face up
- Close door securely
- Turn white light on
- Adjust zoom, contrast, focus from black dial on top of machine
- Turn white light off (turns on UV)
- Press ‘live’ toggle – acq. Should be 0.4 sec.
- Print if desired or save on floppy disk
- Turn power off
- Dispose of gel in proper container
- Close door
May 25, 2009
- Made overnight bacteria culture (200 ml LB: 20 microliters DB3.1)
May 26, 2009
- Took overnight cultures from incubator
- Inoculated 2 500 ml flasks with 25 ml of overnight culture (1 flask/culture)
- Placed 500 ml flasks into incubator at 37 degrees Celcius
- Grew overnights of DB3.1 from Waterloo (thanks :))
June 3, 2009
- Plasmid transformed = pSB1AC3 (TEST)
- Note: team members were of mixed opinion as to whether the transform was likely due to low availability of DNA - DNA was split between a number of transformation reactions for at least 2 different DB3.1 strains. Plates incubated at 30 degrees Celsius overnight, temp. raised to 37 degrees approx. 10:30 a.m.
June 5, 2009
- Tet plates made
- Recipe for 200 ml (approx. 10 plates):
- 2.2 g agar in 200 ml fresh LB
- Note: do not re-autoclave LB, it will caramelize!
- Recipe for 200 ml LB:
- a) 1 g yeast extract
- b) 2 g peptotryptone
- c) 2 g NaCl
- d) 200 ml water
- Recipe for 200 ml (approx. 10 plates):
- Autoclaved at 11:20 a.m., picked up at 1:15 p.m. and cooled in water bath at 37 degrees Celsius
- Added 200 microlitres tetracycline stock (from -20 freezer) to final concentration of 20 microgram/ml
- Swirl and poured into prepared, labeled plates
- Note: label on plates reads June 3, 2009 but should be June 5, 2009 (8 plates in total - either I overpoured or these plates are a bit larger than I was used to)
- Inverted and put in 37 degree incubator to dry
June 8, 2009
- Bacteria grown to log phase using sterile inoculating loop to inoculate approx. 200 ml of LB media with bacteria from 2 plates (approx. 3 colonies)
- Bacterial liquid culture placed in shaker at 10:51 a.m.
June 9, 2009
- Digested miniprepped gel with EcoRI and SpeI
- Running gel to see if correct plasmid was purified - should expect to see bands at ~3200 bp
- DNA Ladder made - 6 microlitres of stock used
June 10, 2009
- Poured 10 Tet plates following procedure on June 5, 2009
- Due to problems with DNA ladder and restriction enzyme digest yesterday, procedures were followed again today with the following adjustments
- DNA was diluted and run on lanes 1-5 of gel:
- Lane 1 - 1X
- Lane 2 - 1/6X
- Lane 3 - 1/36X
- Lane 4 - 1/10X
- Lane 5 - 1/100X
- Restriction enzyme digest was repeated with an incubation time of 4 h at 37 degrees Celsius and heat shock at 80 degrees Celsius was done in hot water bath
- Results: Dilution did not work well (ladder could not be visualized). Digest appeared to work as 3 bands could be seen in last 2 lanes
- Adjustments for tomorrow:
- Spin down enzymes before using
- Overnight digest
- DNA was diluted and run on lanes 1-5 of gel:
June 11, 2009
- We did not have enough isolated plasmid DNA to justify doing another gel so we decided to perform another gel so we decided to perform another miniprep to get some more
- Used DB3.1 transformed bacteria from shaker(measured spec 0.794)
- Miniprep
- potential issue our microcentrifuge only spins @ 10,000 not required 12,000
- Binding DNA
- did both optional steps preheated TE + washed w/ W10
- measured UV absorbance = 4.2ng/ul
- in all there is ~ 74 ul of TE should indicated ~370 ng of plasmid.
- Digest
- NOTE: plasmid length w/e biobric is 3189 bp biobrick length is 3255bp this can explain lack of 2 clear bands on gel after ligation.
- nevertheless, we will perform another Gel to make sure we can properly run ladder to determine fragment sizes
- digest measurements: 250ng plasmid all else half except BSA
June 12, 2009
- Ran Gel
- Ladder and other bands were able to be visualized however were still a little wonky
- Suggests for improvement
- increase the glycerol [] in loading dye as there have been problems with diffusion when loading samples as the solution is not falling into the wells
June 15, 2009
- made 1ml and 200ul aliquotes of Kanamycin 10mg/ml stock and stored at -20C
- Recipe: 250ug Kanamycin + 25ml sterile water
- USE : 2x200ul for final working concentration of 20ug/ml
Trouble shooting ladder
- it was noted that the 1x TBE buffer recipe was off. The
August 1, 2009
- Overnight encapsulin cultures 1 and 6 (randomly selected) and the negative control were miniprepped
- The rest of the encapsulin cultures were stocked with 20% glycerol
- 6 digestions were done: Enc1, Enc6, Enc -ve, BB5, BB7, and C
- 16ul of BB5 plasmid was used
- 500ng of plasmid were used for the others
- The digestions were run on a 1.3% agarose gel in TAE
- BB5 was confirmed and all other parts were correct as well
- Overnight ligation of 7+Enc in the PCR machine
August 2, 2009
- Miniprepped overnight cultures of 1+2 (Sample 3 and 5) and 3+2 (Sample 1 and 2)
- Digested these plasmid samples and ran on gel with negative control (straight from fridge)
- The 3kbp in the digest of 1+2 Sample 5 was not expected
- Comparing the 2 samples of 3+2, the digest of sample 1 did not have a 700bp band, and the undigested sample 1 was about 500bp shorter than the undigested sample 2. We suspect the plasmid in sample 1 did not take up the 3+2 part and somehow recircularized.
- Transfected overnight ligations of 7+Enc into DH-5alpha cells and plated onto C plates
August 3, 2009
- No colonies were found on 7+Enc plates
August 4, 2009
- Started overnight cultures of BB1+2 sample 1,2, 4 and K stocks
- Digested BB4, BB5 and C plasmid, and ran them on a gel
- All bands were of expected sizes.
- Started overnight ligation of 4+5 into C plasmid
August 5, 2009
- Transfected overnight ligation and plated them on C plates
- Plated new C plates (probably meant poured)
- Miniprepped overnight cultures of BB1+2 and K plasmid
August 6, 2009
- Digested BB1+2 Samples 1,2,4 and K plasmid with restriction enzymes EcoR1 and Pst1
- The digests along with negative controls were ran on a gel
- The 1+2 insert was not seen on the gel, probably because it is too small
- The ccdb gene (~600bp) was not seen on the gel
August 7, 2009
- Started overnight cultures of 1+2 sample 1,2,4
- Retransformed BB1 using the iGEM 2007 Toronto team's protocol (heat shock for 90s) and plated on Amp plates
- Plated DH5alpha cells as a control on plain LB plates
- This is thumotoga maritime genomic DNA for purpose of re-cloning
- This is thumotoga maritime genomic DNA for purpose of re-cloning
- Microcentrifuge tubes 1 and 2 placed in -20 freezer
August 8, 2009
- BB1 transformants showed many colonies
- plates (a plate full of colonies)
- -> increasing heat shock to 90s increased efficiency (Note: 3x DNA used in this transformation)
- Calvin mentioned he does heat shock for 120s
- Calvin also suggested to increase tranformation time, ie. after adding DNA, hold on ice for an hour
- DH-5alpha replates all grew on the plates, demonstrating LB can be re-autoclaved and poured as plates
- there was no difference between transformants directly plated after adding LB+glucose or incubating for an hour
- Miniprepped overnights (1+2) samle 1,2,4, and K
August 10, 2009
- Digested plasmid samples miniprepped on Sat (1,2,4,K) and Enc, C plasmid with EcoR1 and Pst1
- Ran a gel for the digests
- (1+2) Sample 1 appeared to have a ~100bp band
- K plasmid digest did not show the ccdb gene (~700bp) - will start another culture with antibiotics
- Started overnight cultures of (1+2) Sample 1
August 11, 2009
- Digested 4, 5, Enc, C(E+P), C(X+S)
- BB4 did not digest
- 5, C is stored in fridge
- Calvin suggested increasing the concentration of enzyme and increase time of digestion due to thawing enzymes over weekend in fridge
- Miniprepped 1+2(1) with new kit, got great yield ~100ng/ul
- Gel extracted C (X+S) after it was CIPed
- Overnight ligation of Enc+C in PCR machine
- Calvin gave us 2 vials of RbCl cells in -80C
- one time use only
- thaw and add DNA
August 12, 2009
- Transformed Enc+C ligations
- Digested BB4 again
- Started overnight ligation of 4+5
- started overnight culture of BB7
- Problem was found in C plates: too soft
- not enough agar?
August 14, 2009
- Miniprepped 5, 7, C with normal protocol of BioBasics Kit
- Results were low ~30ng/ul
- Digested C and CIPed it
- Ran 4 digest and plasmid samples of 5, 7, C and the CIPed C plasmid samples of 5, 7, C and the CIPed C plasmid
- Gel extracted CIPed C plasmid
- Ligated 4+5 and Enc into C plasmid and plated
August 16, 2009
- Started overnight culture for BB5, 7, C
August 17, 2009
- Miniprepped overnight cultures of 5, 7, C
- 7 sample had a very low yield
- started another overnight for & and will miniprep again tomorrow
- Digested (1+2) Sample 1, (3+2) Sample 2, 4, 5 and K plasmid
- Started an overnight ligation for (1+2)+(3+2) and 4+5 in K plasmid
- Ran digests on a gel
August 18, 2009
- Tranfected ligation products into DH-5alpha cells and plated on old plates
- Miniprepped overnight culture of 7
- Digested Enc6, C (E,P)
- ran a gel with digests
- Digested Enc 6, C (X,S)
- Ran a gel with digests
- Gel extracted C (CIPed)
- Started overnight cultures for Tet, K plasmid
- Started overnight digest for Enc6
August 19, 2009
- Miniprepped overnight cultures of Tet, K
- Ran a gel of the ligations and the overnight digest
- Started overnight culture of 4+5 colonies
- Ligated Enc into CIPed C backbone
- Started overnight K and Tet digestion
- Poured Tet plates
August 20, 2009
- Digested C plasmid
- Ran gel of C, K, Tet digests
- Miniprepped 4+5 overnight cultures -> 4+5?
- Started overnight cultures of Tet and a negative control
August 21, 2009
- No growth of negative Tet overnight culture
- Tet overnights were miniprepped
- Digested 4+5?, Tet, and TetX with (EcoR1 and Pst1)
- The digests were run on a gel with negative controls
- None of the samples were confirmed
- Started overnights for Tet plasmid, 2 with tetracyclin and 1 with ampicillin
August 22, 2009
- Miniprepped overnights:
- Tet1: Did 2 minipreps, one with normal protocol, one with low copy plasmid protocol
- Normal protocol gave a higher yield
- Tet with ampicillin: used low copy plasmid protocol, but cell pellet was much bigger therefore got the same yield as Tet1 normal protocol
- Tet1: Did 2 minipreps, one with normal protocol, one with low copy plasmid protocol
- Digested the 2 samples with higher yields (500ng)
- Ran digests on gel, but still couldn't see ccdb gene
- Started to doubt restriction enzyme function, therefore redigested Tet H (1ug) and C plasmid (500ng)
- (1.5h digests for all digests today)
- Ran Tet H and C digests on a gel
- A faint ~700bp band was observed in the Tet lane
- More plasmid should be used for plasmid digests
- Started overnight ligation of 4+5 in Tet backbone
August 23, 2009
- Transfected 4+5, Enc+C (x2) ligations into 1 tube of Calvin's cells (aliquots of 33ul of cells)
- plated Enc transformants onto C plates
- Since there were no Tet plates, 400ul of tetracyclin was spread onto a plain LB plate and dried, before plating 4+5 transformants
- Started overnight cultures of 1+2 and 3+2 in 5ml of LB
August 24, 2009
- Replated left over cells
- Miniprepped 1+2 overnights, yielded ~40ng/ul
- 3+2(2) showed no growth
- Plates in the incubator showed no colonies
August 25, 2009
- Enc replate showed 3 colonies
- Started a log phase growth of 3+2(2), but it showed not growth again
- Started overnight cultures:
- Enc A, B, C
- 3+2 (2), (3), (4), (5), and a 3+2 (2) positive control (in LB only)
- BB3 and BB4
August 26, 2009
- 4+5 plates showed 2 big colonies and 1 small colony
- Started log phase for 4+5 (1), (2) (did not stock)
- 3+2 overnights did not grow
- They are not C-resistant?
- We have to redo the 3+2 ligations
- Miniprepped Enc A, B, C, BB3 and BB4
- Digested miniprepped samples and also BB2, 1+2 plasmid for 2 hours
- Ran digests on a gel
- 1ug of plasmid was digested for Enc A, B, C, BB2, BB3, BB4; and 1/5 was loaded on to gel (10ul of digest)
- 30x37.4=1122ng of plasmid was digested for 1+2; and 16.5ul was loaded (1122x16.5/50=370.26ng)
- Miniprepped log phase of 4+5 (1), (2)
August 27, 2009
- Digested 4+5 (1), (2), BB7 with E+P
- Ran digstes on gel
- wall between lane 5 and 6 was broken upon loading
- religated BB3 digest and 3+2 into C plasmid for 2 hours at room temperature
- plated ligations: 2ul of ligation in 25ul of cells
August 28, 2009
- Transfected 50ul of DH5 cells with 4+5(1) plasmid (2ul)
- added 100ul of LB+glucose and plated all on a Tet plate
- Mixed up LB+agar for pouring C plates on Monday (Aug 31)
- Picked colonies growing on 4+5 plate and Enc plate and started overnight cultures
August 29, 2009
- Stocked Enc, 4+5 overnights and stored remaining culture in the fridge (4C)
- 4+5 retransfection plate did not show colonies
August 30, 2009
- 4+5 retransfection plate had full plate of colonies
- Overnight cultures of 4+5 and BB7 were started
August 31, 2009
- Stocked 4+5R culture (retransfection)
- Miniprepped overnight cultures of 4+5 (3,4,5,R), BB7, and EncX,Y,Z
- Digested EncC with E,S; 5 with X,P; Tet, 7, EncX,Y,Z with E,P
- Ran digests on a gel
- EncY shows Enc insert
- 5 digest lane shows a thick band the same size of the linear isoform in the control
- Poured C plates
- 3+2 tranformation from Aug 27 showed a few colonies
- 3 largest colonies were picked to start overnight culture
- Started overnight ligation of Enc+5/Tet with negative control
September 1, 2009
- only 3+2a overnight showed growth
- Miniprepped 3+2a
- digested 3+2a, 4+5R, 3, 4, 5 with E,P
- Transfected EncC+5 and negative control into DH-5 cells, plated on Tet plates
- mistakenly tranfected T, K plasmid into DH-5 cells (ccdb gene)
- Ran digests on a gel
- 3+2 still not confirmed, but all 4+5 samples showed expected band
September 2, 2009
- Transfected Tet, K (RFP) backbone plasmids and Amp, C (ccdb) plasmids into DH-5alpha cells and DB3.1 cells respectively and plated on appropriate antibiotic plates
- Enc+5 showed larger colony -> started overnight
September 3, 2009
- only 1+2 (1), (4) showed growth in C
- Miniprepped Enc+5, 1+2 (1), (4)
- Digested Enc+5 with E,P, 1+2 (1), (4) with E,S, 3+2a with X,P for 1.5h
- Ran digests and old Tet digest from Monday on a gel
- Forgot to add plasmid to controls
- Tet digest still good
- Enc+5 digest doesn't have ~900bp band -> not confirmed
- Started overnight ligation of 1+2+3+2/Tet
- Started overnight cultures: Ampx1, Kx2 Enc+5 x3, Tet, BB7
September 4, 2009
- Miniprepped overnight cultures
- stocked Amp, K1, K2, and Enc+5 (2), (3), (4)
- Digested Enc+5 (1)-(4), K1,2, BB7
- Transfected 1+2+3+2 into DH-5 cells (50ul)
- left on ice for 2.5h after adding ligation product
- incubated on shaker for about 2h
- Started overnight of C plasmid (ccdb)
September 5, 2009
- Ran a gel of digests from yesterday with controls
- Miniprepped C overnight culture
- Tet plate (Tet with RFP) showed 2 red colonies
September 7, 2009
- Digested C plasmid and redigested Enc+5 (1), (3), K1, K2
- Started Tet1, Tet2 overnight culture
September 8, 2009
- Ran a gel of the digests
- Enc+5 band still not showing may have to religate
- K and C plasmids digests showed inserts
- Started log phase culture for Tet1, Tet2
- 1+2+3+2 plate still hasn't shown any colonies#Ran digests on a gel
- Started overnight ligation of 1+2+Enc, 1+2+3+2 in K1
September 9, 2009
- Transfected cells with overnight ligations
- 2 samples per ligation
- Plated and grew overnight at 37C
September 10, 2009
- Saw lots of growth on plates (no red colonies yet)
- Prepared 10 overnight growth placed in incubator at 30C in K antibiotics
- put plates back in incubator at 37C
September 11, 2009
- Overnight cultures (x5) were miniprepped
September 12, 2009
- Started 20h digest of miniprepped samples
September 13, 2009
- Ran digests and negative controls on gel, but no bands at all were seen.
September 14, 2009
- Started overnight cultures of same 5 samples
September 15, 2009
- only 1232 (3) showed growth, miniprepped
- started overnight cultures of for 1232 (2), (4), 12E (2) and EncY
September 16, 2009
- Only EncY showed growth, miniprepped
- picked streaks of cells from 12E plates and 1232 plates (2 streaks per plate) and started overnights along with controls
- Target cells: 1232 mix1, 1232 mix2, 12E mix1, 12E mix2
- Controls:
- positive control: no antibiotics
- negative control: Kanamycin and LB
- control control: LB only
September 17, 2009
- 1232 mix1, 2 and 12E mix2 showed growth
- PCRed EncY plasmid and ran on gel
- a huge ~700bp band was seen
- Prepared EncY for sequencing
September 18, 2009
- Digested 1232 (3), 1+2, 7, EncY, K
- Ran digests on gel
- 7 did not show up on gel
- Enc band was faint/did not show up
September 19, 2009
- 12E replates showed some colonies -> started overnights: 12E a,b,c,d,e
- started overnight culture for EncY
- 1232 replates showed many colonies:
- 1232 (1) had all pink colonies (does NOT contain insert)
- 1232 (2) had no pink colonies (contains insert
- These plates were stored in the fridge
September 20, 2009
- Miniprepped overnights except 12E (which did not show any growth in LB with antibiotics)
- Digested 7,K, EncY, 12E a,b,d,e
- Ran digests on gel
- only Enc was confirmed on this gel
- Started K1 overnight
September 24, 2009
- Made a new batch of chemically competent cells
- poured cells into 50ml falcon tubes
- 350ul aliquots + 350ul 40% glycerol
- Started 12E overnights from transfections done yesterday
- Named: 1-5, a-e, but these have been used already, hence 1-5 were renamed 6-10, a-e renamed f-j
- Transformed ligation from Monday and negative control into new cells and plated on new K plates
September 25, 2009
- Miniprepped 12E 6-10, f-j
- overnights from 9,10,g,i had almost no growth (confirmed after 1st centriugation step: did not miniprep)
- Digested miniprepes and ran on gel -> no bands
- Started overnights again
September 26, 2009
- Only 12E (6),f,j,h
- Digested minipreps
- Ran a gel
September 28, 2009
- Started 5ml overnight cultures of 6,f,j,h with kanamycin
- added 5ul in 25ml LB then separated into 4 aliquots (1 aliquot left over)
September 29, 2009
- took 400ul aliquots of the 4 samples for storage as stocks
- Miniprepped the rest of the samples
- Ran gel saw no colonies
- Rechecked plates: lack of red colonies is suspicious
- DH5 may be somewhat resistant to K (suggested by Calvin)
- May need to gel extract backbone and parts before ligation
- We are out of K plates; need to make more
October 1, 2009
- Miniprepped Tet, 5, EncY, C
- Ran minipreps and K plasmid on a gel
- Besides Tet, all samples looked fine
- Poured K plates
October 2, 2009
- Digested K, EncY and ran on gel
October 3, 2009
- Digested EncY and old Tet plasmid -> ran on gel
- EncY looked fine, but Tet did not show up on gel
- Started overnight culture of Tet
October 4, 2009
- Miniprepped, digested Tet and ran on gel
- Tet was confirmed
- gel extracted EncY, Tet and got low yields
- Started overnight ligations
- 1: Digested Tet + EncY + 5
- 2: Gel extraced Tet + Digested EncY + 5
- negative controls were Tet plasmid alone
October 8, 2009
October 9, 2009
- Miniprepped EncY overnight and digested with E,P
- Ran digest on a gel
- Enc part confirmed
- Transfected Enc+5 ligations from Sunday/Monday into competent cells from Invitrogen
- Used NEB Hight Efficiency Transformation Protocol C2987
- did one 10-fold dilution
- transformed 5ul of DNA
- spread 100ul of cells on plate
- shaker/incubator speed 232rpm
- Used NEB Hight Efficiency Transformation Protocol C2987
October 11, 2009
- Checked plates, no colonies yet
- Picked colonies and started overnights from an old 12E plate that wasn't checked: 12E i,ii,iii
October 13, 2009
- 12E i and iii showed growth -> miniprepped
- Digested and ran on 1% agarose gel
- Stained gel for 1 hour in EtBr+buffer
- A faint ~700 band was observed! This could possibly be the 1+2+Enc insert that we want.
- To confirm the insert, we decided to sequence it
October 15, 2009
- Primers for sequencing 12E insert was designed and ordered
October 16, 2009
- EncY prepped and ready to ship down to MIT to submit part to registry