Team:Gothenburg-Sweden/Lab Note

From 2010.igem.org

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<tr><td> <strong>2010-07-22</strong><br>
 +
Karl, Lokesh and Kemal<br><br>
 +
A new mastermix was prepared using a different enzyme. Then the experiments from yesterday was redone using regular PCR settings: <br>
 +
A, 5, 2, I<br>
 +
Then some more experiments of IV was redone: <br>
 +
2a, 2b and 2c<br>
 +
The new primer 14 had arrived so PCR reaction 4 was also redone. <br><br>
 +
All the PCR products were run on a 0.7 % agarose gel with GeneRuler 1 kb DNA ladder. The results were inconclusive. None of the expected bands were received.  At this point we are not sure what to do since none of the PCR reactions worked. <br><br>
 +
<strong>2010-07-21</strong><br>
 +
Malin, Julia, Karl and Lokesh<br><br>
 +
<strong>Verification of the PCR products </strong>&alpha;1, &alpha;2, &alpha;3, &alpha;4, &alpha;5 and &alpha;K by running on a thin 0.7 % agarose gel (8 &micro;l sample+ 2 &micro;l loading buffer, GeneRuler 1 kb DNA ladder). <br><br>
 +
The gel didn’t show the expected band lengths. A band around 700 bp could be seen, most strongly for &alpha;4 and &alpha;5.  We suspect that there is something wrong with the ladder because we get inconclusive results. Since none of the PCR reactions for the last couple of days have worked we will redo the templates of &alpha; and IV: I, 2, 5 and A. These PCR reactions have worked before. <br><br>
 +
<strong>Expected fragment length: </strong><br>
 +
A.2: 1938 bp<br>
 +
5.2: 757 bp<br>
 +
2.2: 762 bp<br>
 +
I.2: 768 bp<br><br>
 +
The PCR products were run on a thin 0.7 % agarose gel. We used both the FastRuler High Range Ladder and the GeneRuler 1 kb DNA ladder. 5.2 and 2.2 showed the expected bands around 750 bp. I.2 and A.2 did not work at all, nothing visible on the gel.  We also run some of the old PCR products to see what the result would be using a new ladder. We run &alpha;2, &alpha;5, 4c (IV) and 4c*(IV). Here some template amplifications were visible but sadly none of the expected fragment lengths. Both ladders showed the same result so there is probably nothing wrong with the GeneRuler ladder except that it is not showing strong color. <br><br>
 +
<strong>2010-07-20</strong><br>
 +
Malin, Julia, Lokesh and Karl<br><br>
 +
<strong>Verification of yesterdays PCR reactions </strong>by running on a 0.7 % agarose gel (8 &micro;l sample+ 2 &micro;l loading buffer, GeneRuler 1 kb DNA ladder) <br><br>
 +
None of the reactions worked. <br><br>
 +
Gel 1 (Block A): Nothing visible on gel, ladders only very light so these samples were run on a new 0.7 % agarose gel but this time thinner to get better resulotion (0.58 g agarose + 80 ml TBE). This time no expected fragments were seen, but bands corresponding to primer dimers were clearly seen. <br>
 +
Gel 2 (Block B): A few small bands were seen but no bands of expected length. <br><br>
 +
We decided to stop working on IV until proper feedback on the experimental setup was received. Instead we continued with &alpha;.<br><br>
 +
<strong>Doing another PCR round of &alpha; (SAMS peptide): </strong> <br>
 +
<strong>&alpha;: PCR fusion of cfp-SAMS and yfp: </strong>Adds BamHI on N-terminus of cfp and HindIII on C-terminus of yfp and keeps the stop codons. Expected fragment length: 1502 bp. <br><br>
 +
 
 +
&alpha;1: regular protocol. <br>
 +
&alpha;2: regular protocol. <br>
 +
&alpha;3: 1.25 &micro;l extra primer 9.<br>
 +
&alpha;4: 1.25 &micro;l extra primer 12. <br>
 +
&alpha;5: 1.25 &micro;l extra primer 9 and 1.25 &micro;l primer 12. <br>
 +
&alpha;K: Control<br>
 +
Regular PCR-settings<br><br>
 +
<strong>2010-07-19</strong><br>
 +
Karl, Peidi and Kemal<br><br>
 +
<strong>Doing a new experimental setup for IV: </strong><br>
 +
<strong>IV. PCR fusion of cfp and Snf1: </strong>Adds SpeI on N-terminus of cfp and PacI on C-terminus of Snf1 and keeps the stop codon. Expected fragment length: 2643 bp. <br><br>
 +
13 different tubes were prepared and run at two different PCR-settings. Block A: Regular settings except double annealing time (1 min). Block B:  Regular settings except 58&deg; C annealing temperature. <br><br>
 +
C : Control<br>
 +
1a: same as 2* (template 5 5 x diluted) <br>
 +
1b. same as 3* (template 5 10 x diluted) <br>
 +
1c: same as 4* (template 5 100x diluted) <br>
 +
2a: increased product A concentration to 5 ng/&micro;l. <br>
 +
2b: increased product A concentration to 10 ng/&micro;l. <br>
 +
3a: same as 5* (2x primer 7) <br>
 +
3b: same as 6* (template 5 diluted 5x, 2x primer 7) <br>
 +
3c: same as 7* (template 5 diluted 10x, 2x primer 7) <br>
 +
3d same as 8* (template 5 diluted 100x, 2x primer 7) <br>
 +
4a: 2x primer 7. <br>
 +
4b: 2x primer 7, 5x template A. <br>
 +
4c: 2x primer 7, 10 x template A. <br><br>
 +
<strong>2010-07-16</strong><br>
 +
Lokesh, Kemal, Katarina and Peidi<br><br>
 +
<strong>Verification of PCR </strong>reactions IV* (8 tubes) and &alpha; on a 0.7 % agarose gel (5 &micro;l sample+ 2&micro;l loading buffer, GeneRuler 1 kb DNA ladder). <br><br>
 +
No bands visible. None of the PCR reactions worked, just small bands visible corresponding to primers. The &alpha; PCR reaction messed the tubes up. That might be an explanation why there were no bands on the gel for &alpha;.  A new experimental setup must be made tomorrow. <br><br>
 +
PCR products I and 2 were run with a low range ladder to see that those products are ok. That gel was satisfactory. <br><br>
 +
<strong>2010-07-15</strong><br>
 +
Malin, Julia, Kemal and Karl<br><br>
 +
<strong>Concentrations of PCR products: </strong><br>
 +
4.2. 356.2 ng/&micro;l<br>
 +
I. 338.3 ng/&micro;l<br>
 +
II. 303.6 ng/&micro;l<br>
 +
III. 337.5 ng/&micro;l<br>
 +
IV. 280.9 ng/&micro;l<br><br>
 +
All PCR-products were diluted to 1 ng/&micro;l. <br><br>
 +
<strong>Verified PCR products</strong> I-IV and 4.2 on a 0.7 % Agarose Gel (8 &micro;l sample + 2&micro;l loading buffer, GeneRuler 1 kb DNA ladder) <br>
 +
PCR products I, II and III were good but 4.2 showed no bands at all. After primer design control we found a problem with primer 14, which then was ordered again. IV had only a band around 700 bp instead of 2600.  This might be template 5, which then has been amplified. If the settings are changed maybe it will work. Firstly the template 5 will be diluted 0x, 5x, 10x and 100x (4 tubes: 1*, 2*, 3* and 4*) and these dilutions will also be run with higher primer concentration 7 (4 tubes: 5*, 6*, 7* and 8*).  2.5 &micro;l primer 7 will be added instead of 1.25 &micro;l primer 7. <br><br>
 +
New PCR reactions were run: <br>
 +
<strong>&alpha;: PCR fusion of cfp-SAMS and yfp: </strong> Adds BamHI on N-terminus of cfp and HindIII on C-terminus of yfp and keeps the stop codons. Expected fragment length: 1502 bp. <br>
 +
K4. Control. <br><br>
 +
<strong>IV *: PCR fusion of cfp and Snf1: </strong>Adds SpeI on N-terminus of cfp and PacI on C-terminus of Snf1 and keeps the stop codon. Expected fragment length: 2643 bp. <br>
 +
Half volume 25 &micro;l. Regular PCR settings except 56 &deg;C annealing temperature. <br>
 +
1*;- 8*<br>
 +
K1*. Control for 1-4*.<br>
 +
K2*. Control for 5-8*.<br><br>
 +
</td></tr> <tr>
<tr><td><p><strong>2010-07-14</strong><br>
<tr><td><p><strong>2010-07-14</strong><br>
-
Julia and Katarina<br>
+
Julia and Katarina <br>
<strong>Ran PCR 1-5.</strong><br>
<strong>Ran PCR 1-5.</strong><br>
1. Amplification of cfp-sams compatible: Add restriction enzyme site BamHI on N-terminus +SAMS on C-terminus.<br> Expected fragment length: 748 bp.<br>
1. Amplification of cfp-sams compatible: Add restriction enzyme site BamHI on N-terminus +SAMS on C-terminus.<br> Expected fragment length: 748 bp.<br>

Revision as of 13:48, 23 July 2010

Chalmers University of Technology

preliminary work & lab notes
 
 
preliminary
 
 

Fluorescent Proteins:

Green Fluorescent Proteins (read more)

Plasmid backbone:

pSP-GM1 (read more)

SNF1 (modified subunits):

Snf1 (alfa), Snf4 (gamma) (read more)

FP positions:

N-terminal alfa with N-terminal gamma, N-terminal gamma with C-terminal gamma (read more)

Primer design:

Fusion primers with restiriction enzyme sites included at very ends, each annealing part was desinged with an melting temperature of around 60 C (read more)

 
 
lab work by date
 
 
2010-07-22
Karl, Lokesh and Kemal

A new mastermix was prepared using a different enzyme. Then the experiments from yesterday was redone using regular PCR settings:
A, 5, 2, I
Then some more experiments of IV was redone:
2a, 2b and 2c
The new primer 14 had arrived so PCR reaction 4 was also redone.

All the PCR products were run on a 0.7 % agarose gel with GeneRuler 1 kb DNA ladder. The results were inconclusive. None of the expected bands were received. At this point we are not sure what to do since none of the PCR reactions worked.

2010-07-21
Malin, Julia, Karl and Lokesh

Verification of the PCR products α1, α2, α3, α4, α5 and αK by running on a thin 0.7 % agarose gel (8 µl sample+ 2 µl loading buffer, GeneRuler 1 kb DNA ladder).

The gel didn’t show the expected band lengths. A band around 700 bp could be seen, most strongly for α4 and α5. We suspect that there is something wrong with the ladder because we get inconclusive results. Since none of the PCR reactions for the last couple of days have worked we will redo the templates of α and IV: I, 2, 5 and A. These PCR reactions have worked before.

Expected fragment length:
A.2: 1938 bp
5.2: 757 bp
2.2: 762 bp
I.2: 768 bp

The PCR products were run on a thin 0.7 % agarose gel. We used both the FastRuler High Range Ladder and the GeneRuler 1 kb DNA ladder. 5.2 and 2.2 showed the expected bands around 750 bp. I.2 and A.2 did not work at all, nothing visible on the gel. We also run some of the old PCR products to see what the result would be using a new ladder. We run α2, α5, 4c (IV) and 4c*(IV). Here some template amplifications were visible but sadly none of the expected fragment lengths. Both ladders showed the same result so there is probably nothing wrong with the GeneRuler ladder except that it is not showing strong color.

2010-07-20
Malin, Julia, Lokesh and Karl

Verification of yesterdays PCR reactions by running on a 0.7 % agarose gel (8 µl sample+ 2 µl loading buffer, GeneRuler 1 kb DNA ladder)

None of the reactions worked.

Gel 1 (Block A): Nothing visible on gel, ladders only very light so these samples were run on a new 0.7 % agarose gel but this time thinner to get better resulotion (0.58 g agarose + 80 ml TBE). This time no expected fragments were seen, but bands corresponding to primer dimers were clearly seen.
Gel 2 (Block B): A few small bands were seen but no bands of expected length.

We decided to stop working on IV until proper feedback on the experimental setup was received. Instead we continued with α.

Doing another PCR round of α (SAMS peptide):
α: PCR fusion of cfp-SAMS and yfp: Adds BamHI on N-terminus of cfp and HindIII on C-terminus of yfp and keeps the stop codons. Expected fragment length: 1502 bp.

α1: regular protocol.
α2: regular protocol.
α3: 1.25 µl extra primer 9.
α4: 1.25 µl extra primer 12.
α5: 1.25 µl extra primer 9 and 1.25 µl primer 12.
αK: Control
Regular PCR-settings

2010-07-19
Karl, Peidi and Kemal

Doing a new experimental setup for IV:
IV. PCR fusion of cfp and Snf1: Adds SpeI on N-terminus of cfp and PacI on C-terminus of Snf1 and keeps the stop codon. Expected fragment length: 2643 bp.

13 different tubes were prepared and run at two different PCR-settings. Block A: Regular settings except double annealing time (1 min). Block B: Regular settings except 58° C annealing temperature.

C : Control
1a: same as 2* (template 5 5 x diluted)
1b. same as 3* (template 5 10 x diluted)
1c: same as 4* (template 5 100x diluted)
2a: increased product A concentration to 5 ng/µl.
2b: increased product A concentration to 10 ng/µl.
3a: same as 5* (2x primer 7)
3b: same as 6* (template 5 diluted 5x, 2x primer 7)
3c: same as 7* (template 5 diluted 10x, 2x primer 7)
3d same as 8* (template 5 diluted 100x, 2x primer 7)
4a: 2x primer 7.
4b: 2x primer 7, 5x template A.
4c: 2x primer 7, 10 x template A.

2010-07-16
Lokesh, Kemal, Katarina and Peidi

Verification of PCR reactions IV* (8 tubes) and α on a 0.7 % agarose gel (5 µl sample+ 2µl loading buffer, GeneRuler 1 kb DNA ladder).

No bands visible. None of the PCR reactions worked, just small bands visible corresponding to primers. The α PCR reaction messed the tubes up. That might be an explanation why there were no bands on the gel for α. A new experimental setup must be made tomorrow.

PCR products I and 2 were run with a low range ladder to see that those products are ok. That gel was satisfactory.

2010-07-15
Malin, Julia, Kemal and Karl

Concentrations of PCR products:
4.2. 356.2 ng/µl
I. 338.3 ng/µl
II. 303.6 ng/µl
III. 337.5 ng/µl
IV. 280.9 ng/µl

All PCR-products were diluted to 1 ng/µl.

Verified PCR products I-IV and 4.2 on a 0.7 % Agarose Gel (8 µl sample + 2µl loading buffer, GeneRuler 1 kb DNA ladder)
PCR products I, II and III were good but 4.2 showed no bands at all. After primer design control we found a problem with primer 14, which then was ordered again. IV had only a band around 700 bp instead of 2600. This might be template 5, which then has been amplified. If the settings are changed maybe it will work. Firstly the template 5 will be diluted 0x, 5x, 10x and 100x (4 tubes: 1*, 2*, 3* and 4*) and these dilutions will also be run with higher primer concentration 7 (4 tubes: 5*, 6*, 7* and 8*). 2.5 µl primer 7 will be added instead of 1.25 µl primer 7.

New PCR reactions were run:
α: PCR fusion of cfp-SAMS and yfp: Adds BamHI on N-terminus of cfp and HindIII on C-terminus of yfp and keeps the stop codons. Expected fragment length: 1502 bp.
K4. Control.

IV *: PCR fusion of cfp and Snf1: Adds SpeI on N-terminus of cfp and PacI on C-terminus of Snf1 and keeps the stop codon. Expected fragment length: 2643 bp.
Half volume 25 µl. Regular PCR settings except 56 °C annealing temperature.
1*;- 8*
K1*. Control for 1-4*.
K2*. Control for 5-8*.

2010-07-14
Julia and Katarina
Ran PCR 1-5.
1. Amplification of cfp-sams compatible: Add restriction enzyme site BamHI on N-terminus +SAMS on C-terminus.
Expected fragment length: 748 bp.
2. Amplification of yfp-SAMS competible: Adds restriction enzyme site for HindIII on C-terminus and SAMS tail on N-terminus.
Expected fragment length: 762 bp.
3. Amplification of yfp-snf4 compatible: Adds restriction enzyme site BamHI on N-terminus and Snf4 tail on C-terminus.
Expected fragment length: 755 bp.
4. Amplification of cfp-Snf4 compatible: Adds restriction enzyme site HindIII on C-terminus and Snf4 tail on N-terminus.
Expected fragment length: 769 bp.
5. Amplification of cfp-snf1 compatible: Adds restriction enzyme site SpeI on N-terminus and Snf1 tail on C-terminus.
Expected fragment length: 757 bp.
K2. Control K2.

Julia, Katarina and Malin
Verified PCR 1-5: measured concentration by nanodrop and checked if the fragments were the correct length by running on a 2 % agarose gel (8 µl sample+2 µl loading buffer, Fermentas FastRuler Low Range).
PCR product 1, 2, 3 and 5 worked and gave expected fragment lengths. Number 4 however did not work. Only a fragment around 80 bp was visible, probably a primer dimer.

Concentrations:
1. 443.9 ng/µl
2. 371.0 ng/µl
3. 361.7 ng/µl
4. --
5. 377.6 ng/µl
A. 451.1 ng/µl (snf1)
B. 438.7 ng/µl (snf4)
C. 408.9 ng/µl (SAMS)
1-5 and A-C were diluted to 1 ng/µl.

Ran PCR of I, II, III, IV and 4.
4.2. Amplification of cfp-Snf4 compatible: Adds restriction enzyme site HindIII on C-terminus and Snf4 tail on N-terminus. Expected fragment length: 769 bp. (second try)
I. PCR fusion of cfp and SAMS: Adds BamHI on N-terminus of cfp and gives a SAMS C-terminus. Expected fragment length: 768 bp.
II. PCR fusion of yfp and Snf4 1: Adds BamHI on N-terminus of yfp and removes stop codon. Expected fragment length: 1694 bp.
III. PCR fusion of yfp and Snf4 2: Adds BamHI on N-terminus of yfp and adds HindIII on C-terminus of Snf4 plus adds stop codon. Expected fragment length: 1708 bp. Final Product!
IV. PCR fusion of cfp and Snf1: Adds SpeI on N-terminus of cfp and PacI on C-terminus of Snf1 and keeps the stop codon. Expected fragment length: 2643 bp.
K3. Control

Karl and Malin
Transferred diploid cells of snf1Δ mutants to two sporulation plates and incubated in 30° C. (For 2-7 days)

2010-07-13
Julia and Lokesh
Ran the gel with products of our first three PCRs along with the templates we made for the two fluorescent proteins. We also prepared the sample solutions of DNA templates with appropriate concentration (1ng/µl) for the next PCR reactions.
Verified the PCR products and the digested miniprepped EYFP and ECFP by running an agarose gel which showed good results. Expected fragment lengths were received. The SAMS-peptide however was too short to be visible on the gel (67 bp).
Prepared for PCR 1-5. The miniprepped ECFP and EYFP were diluted to a stock concentration of 1 ng/ ml to use for the PCR.  The concentrations of the first PCR product were measured using nanodrop and then diluted to 1 ng/ml.
snf1: 20.5 ng/ml
snf4: 122.6 ng/ml
SAMS: 114.9 ng/ml

Karl and Adnan
We made duplicates of the haploid Snf4∆ and wildtype strains on new plates in case the original plate would be contaminated. Prepared a sporulation medium that was autoclaved and poured into empty growth plates to stay in room temperature over night.


2010-07-12
Katarina and Julia
Amplification of genomic SNF1 DNA by PCR. All primers were resuspended in mq-water according to the volume on the lable, the final concentration 100 pg/ml. The primers were then diluted 10x and the SAMS-peptide templates were diluted 1000x. PCR reactions were run amplifying subunits Snf1 and Snf4 and also the SAMS-peptide. YPD medium and agar plates were prepared (yeast).

Adnan and Kemal
Miniprep purification of EYFP and ECFP plasmides from overnight culture. The concentrations were measured using Nanodrop:
ECFP1: 99 ng/ml
ECFP2: 89.9
EYFP1: 104, 7
EYFP2: 172,5
The concentrations were verified with electrophoresis. The plasmids were cut with restriction enzymes EcoRI and Pst1.
ECFP, plasmid pSB1AK3, fragment sizes 750 bp and 3200 bp.
EYFP, plasmid pSB1A2, fragment sizes 750 bp and 2050 bp.


2010-07-11
Katarina
Made overnight cultures with colony 3 and 4 plasmid (not single cultures) and twp each of EYFP and ECFP.


2010-07-10
Julia
Moved plated bacteria from incubator to refrigerator.

2010-07-09
Malin and Julia
The SOC medium was autoclaved. Competent E.coli cells were transformed with our FPs through heat shock and plated on petri dishes. 20 new LB-amp plates were made.

Adnan and Katarina
Picked up primers at Chalmers and checked if they were ok. The concentration of the genomic DNA (SNF1 gene) were measured. Prepared a master mix so that the PCR-reactions could be started Monday morning.

2010-07-08
Malin, Julia and Peidi
The two BioBricks EYFP and ECFP were extracted from the kit plates and stored in the freezer. A SOC-medium was prepared.

2010-07-07
Adnan, Katarina and Julia
As the gels from Tuesday showed ambigous results we decided to redo the miniprep of the plamids. We used the overnight preparations of the two unused colonies (3 & 4). The miniprep went smoothly except for major difficulties regarding untrustworthy pipettes. The pipettes marked with green tape are the ones to use from now on together with the tips with the same markings! A gel was molded and this time we decided to use a full gel to get a better resolution.  The results on the gel were very good.  The plasmids had clearly been cut in one or two places and the fragment sizes seem to correspond to the expected sizes.

2010-07-06
Malin, Adnan and Peidi
Colony 1 and 2 were picked to do a miniprep. The plasmids were extracted and a plasmid integrity check was performed. By cutting with BamHI, one cut were made to get the size of the plasmid. Then we cut with ClaI which is a two-cutter that gives a fragment that is 600 bp and one that is 6800. The gel which should confirm this was not satisfactory since the 600 band was missing.

2010-07-05
Malin and Katarina
An overnight culture were made from 4 different colonies of E.coli containing the plasmid pSB-GM1.

 
pictures
 
 

gel_plasmid

PIC 1: Gel of plasmid (cut)
 
 
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