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Team:Colombia Uniandes/NickoJournal
From 2013.igem.org
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Revision as of 04:36, 25 September 2013
Contents
Dear Journal! :)
Here we will place all the information about the work we have been doing during this time, it will be named by date.
We hope you enjoy our work and thoughts as much as we do!
Our Notebook
18-Jun-2013
Hello! Hello! Hola! Hola!
After we went over the project, we proceed to design our primers so we could place our order, taking into account that we are going to use Fusion PCR as our main protocol. Our primers take around 2 weeks to arrive… sooo meanwhilee all the team started making our E.coli babies electrocompetent, so we can work with them later on.
25-Jun-2013
So today we took our bacterial cells (Top 10) onto an LB medium (no antibiotics). We let it ON at 37 °C on the shaker. Also we prepared all the material we need for tomorrow: ddwater, 10 % glycerol, LB medium and microfuge tubes.
26-Jun-2013
Today we are going to start preparing our cells, we inoculated in the morning and placed all our material that needs to be cold in the fridge 4 °C(ddWater and glycerol), also the centifuge rotor needs to be chilled.
Then we just waited for the perfect OD and made our cells around 4:00pm. We made a lot!
We placed them in the -80, ready to start our work!!!
2-Jul-2013
Our primers are FINALLY here and we are anxious to start working!!!
So we made our plan(in theory)on big steps for the next weeks!:
1. DNA extraction from E.coli and Cupriavidus metallidurans CH34
2. PCR
2.1 PrcnR, RBS, rcnR, stop (Amplified as one piece)
2.2 PrcnA,RBS
2.3 hoxN, stop
3. Fusion PCR
3.1 PrcnA/hoxN
3.2 PrcnR,RBS,rcnR/PrcnA/hoxN
On each PCR add 30 steps more of making gels for confirmation, again and again and again.
3-Jul-2013
Fortunately our team member Silvia Cañas already had a DNA extraction from E.coli so she donated it to us so we could start working! Thank you Silvia! :)
We asked for Cupriavidus metallidurans to our teacher Jenny Dussan at her lab here in the university. She is giving us the strain tomorrow morning! Thank you Jenny!
This done, did the extraction of C.metallidurans and store it in the -30 °C.
4-Jul-2013
Today we started with the 2-step PCR of PrcnR, RBS, rcnR, stop (Fragment that will be called "R" from now on).
Results were negative :(
5-Jul-2013
Today we repeated "R" PCR and also did hoxN with the Cupriavidus metallidurans genome. The quantities used for the reaction of hoxN are shown in the table below.
Results were negative :( as we could see in our sad, SAD gel.
PCR reagents and amounts for one 50 ul reaction
Reagent
Amount
C.metallidurans DNA
3,0 ul
Primer FW
2,5 ul
Primer RV
2,5 ul
DMSO
2,0 ul
Master Mix
25 ul
dH2O
15 ul
9-Jul-2013
So, our PCRs are NOT working....We think our problem is the length of the primers and their constitution that could form secondary structures very VERY easily.
That's why we tried a new procotol of PCR for "R" with a temperature gradient, and we tried new buffers for hoxN. Reagents and quantities are shown in the table below.
PCR reagents and amounts for one 50 ul reaction
Reagent
Amount
Escherichia coli DNA
2,0 ul
Primer FW
2,5 ul
Primer RV
2,5 ul
DMSO
2,0 ul
Master Mix
25 ul
dH2O
16 ul
We got a POSITIVE result on hoxN, and POSITIVE with "R" at "low" temperatures of annealing. Here is our BEAUTIFULLL gel.
GoodNewsGEL
On 5,7,8,9 we can see "R" fragment of 359bp.
On 12 we can see hoxN fragment of 837bp.
11-Jul-2013
Today we did the PrcnA PCR and it didn't work out.
15-Jul-2013
We started hoxN PCR with the fusion primers, over the C. metallidurans genome, using 2-step PCR protocol.
Results are negative.
17-Jul-2013
We repeated hoxN PCR with the fusion primers over the genome and PrcnA PCR with E.coli genome.
Nothing worked OUT :( !!!
We are going to try to do the PCR of hoxN with the phusion primers over the fragment already amplified and see, as fas as PrcnA goes...we will try a temperature ramp with a 3-step PCR protocol.
End for today :(
04-Sept-2013
Primers are here! Today we are going to do pRcnA PCR. Besides iGEM kit, we used Phusion High Fidelity PCR kit and tested its two buffers: Phusion HF reaction Buffer and Phusion GC Reaction Buffer. We used a 2-step PCR protocol. Reagents and quantities of iGEM kit are the same we have been using until now, but reagents and quantities used for Phusion High Fidelity PCR kit are shown in the table below.
PCR reagents and amounts for one 50 ul reaction
Reagent
Amount
Escherichia coli DNA
4,0 ul
Primer FW
2,5 ul
Primer RV
2,5 ul
Buffer
10 ul
dNTPs
1,0 ul
DMSO
1,5 ul
Pol
0,5 ul
dH2O
28,3 ul
05-Sept-2013
We did hoxN PCR by using the same kits than yesterday and 2-steps protocol. However, results are negative :'(.
06-Sept-2013
Due to we have been had troubles with PCRs, we decided to do genome extraction of our bacteria again. For this purpose we used Easy DNA Isolation Kit, Invitrogen. We followed manufacturer's instructions (File:Easy-DNA Kit.pdf)We confirmed the extraction by gel electrophoresis. Genomes Extracted :D
09-Sept-2013
Today we did PCR of hoxN from the new C. metallidurans genome exracted and guess what? We got hoxN a beatiful band around 600 pb :D :D.
10-Sept-2013
We did PCR of rcnR using the E. coli genome extracted last Friday and Phusion High Fidelity PCR kit. On the gel we got a diffuse band around 400 pb, so we could not conclude anything.
12-Sept-2013
We did PCR of pRcnA and rcnR again using a annealing temperature gradient between 45°C and 60° and using the two buffers: Phusion HF reaction Buffer and Phusion GC Reaction Buffer. On the gel we saw a band that corresponded to pRcnA when the annealing temperature had been around 53°C and GC buffer had been used. On the other hand, in rcnR reactions we got a band when buffer HF had been used and when annealing temperature was around 58°C.
13-Sept-2013
Today we did hoxN-rfp phusion. We used Phusion High Fidelity PCR kit, Phusion HF reaction Buffer and the amounts of other reagents described below.
PCR reagents and amounts for one 50 ul reaction
Reagent
Amount
rfp DNA
2,0 ul
hoxN DNA
2,0 ul
Primer FW
1,0 ul
Primer RV
1,0 ul
Buffer
4 ul
dNTPs
0,4 ul
DMSO
1,0 ul
Pol
0,2 ul
dH2O
8,4 ul
Contents |
Dear Journal! :)
Here we will place all the information about the work we have been doing during this time, it will be named by date. We hope you enjoy our work and thoughts as much as we do!
18-Jun-2013
Hello! Hello! Hola! Hola! After we went over the project, we proceed to design our primers so we could place our order, taking into account that we are going to use Fusion PCR as our main protocol. Our primers take around 2 weeks to arrive… sooo meanwhilee all the team started making our E.coli babies electrocompetent, so we can work with them later on.
25-Jun-2013
So today we took our bacterial cells (Top 10) onto an LB medium (no antibiotics). We let it ON at 37 °C on the shaker. Also we prepared all the material we need for tomorrow: ddwater, 10 % glycerol, LB medium and microfuge tubes.
26-Jun-2013
Today we are going to start preparing our cells, we inoculated in the morning and placed all our material that needs to be cold in the fridge 4 °C(ddWater and glycerol), also the centifuge rotor needs to be chilled. Then we just waited for the perfect OD and made our cells around 4:00pm. We made a lot!
We placed them in the -80, ready to start our work!!!
2-Jul-2013
Our primers are FINALLY here and we are anxious to start working!!! So we made our plan(in theory)on big steps for the next weeks!:
1. DNA extraction from E.coli and Cupriavidus metallidurans CH34
2. PCR
2.1 PrcnR, RBS, rcnR, stop (Amplified as one piece) 2.2 PrcnA,RBS 2.3 hoxN, stop
3. Fusion PCR
3.1 PrcnA/hoxN 3.2 PrcnR,RBS,rcnR/PrcnA/hoxN
On each PCR add 30 steps more of making gels for confirmation, again and again and again.
3-Jul-2013
Fortunately our team member Silvia Cañas already had a DNA extraction from E.coli so she donated it to us so we could start working! Thank you Silvia! :)
We asked for Cupriavidus metallidurans to our teacher Jenny Dussan at her lab here in the university. She is giving us the strain tomorrow morning! Thank you Jenny!
This done, did the extraction of C.metallidurans and store it in the -30 °C.
4-Jul-2013
Today we started with the 2-step PCR of PrcnR, RBS, rcnR, stop (Fragment that will be called "R" from now on). Results were negative :(
5-Jul-2013
Today we repeated "R" PCR and also did hoxN with the Cupriavidus metallidurans genome. The quantities used for the reaction of hoxN are shown in the table below. Results were negative :( as we could see in our sad, SAD gel.
| Reagent | Amount |
| C.metallidurans DNA | 3,0 ul |
| Primer FW | 2,5 ul |
| Primer RV | 2,5 ul |
| DMSO | 2,0 ul |
| Master Mix | 25 ul |
| dH2O | 15 ul |
9-Jul-2013
So, our PCRs are NOT working....We think our problem is the length of the primers and their constitution that could form secondary structures very VERY easily.
That's why we tried a new procotol of PCR for "R" with a temperature gradient, and we tried new buffers for hoxN. Reagents and quantities are shown in the table below.
| Reagent | Amount |
| Escherichia coli DNA | 2,0 ul |
| Primer FW | 2,5 ul |
| Primer RV | 2,5 ul |
| DMSO | 2,0 ul |
| Master Mix | 25 ul |
| dH2O | 16 ul |
We got a POSITIVE result on hoxN, and POSITIVE with "R" at "low" temperatures of annealing. Here is our BEAUTIFULLL gel.
 |  |
On 5,7,8,9 we can see "R" fragment of 359bp. On 12 we can see hoxN fragment of 837bp.
11-Jul-2013
Today we did the PrcnA PCR and it didn't work out.
15-Jul-2013
We started hoxN PCR with the fusion primers, over the C. metallidurans genome, using 2-step PCR protocol.
Results are negative.
17-Jul-2013
We repeated hoxN PCR with the fusion primers over the genome and PrcnA PCR with E.coli genome.
Nothing worked OUT :( !!!
We are going to try to do the PCR of hoxN with the phusion primers over the fragment already amplified and see, as fas as PrcnA goes...we will try a temperature ramp with a 3-step PCR protocol.
End for today :(
04-Sept-2013
Primers are here! Today we are going to do pRcnA PCR. Besides iGEM kit, we used Phusion High Fidelity PCR kit and tested its two buffers: Phusion HF reaction Buffer and Phusion GC Reaction Buffer. We used a 2-step PCR protocol. Reagents and quantities of iGEM kit are the same we have been using until now, but reagents and quantities used for Phusion High Fidelity PCR kit are shown in the table below.
| Reagent | Amount |
| Escherichia coli DNA | 4,0 ul |
| Primer FW | 2,5 ul |
| Primer RV | 2,5 ul |
| Buffer | 10 ul |
| dNTPs | 1,0 ul |
| DMSO | 1,5 ul |
| Pol | 0,5 ul |
| dH2O | 28,3 ul |
05-Sept-2013
We did hoxN PCR by using the same kits than yesterday and 2-steps protocol. However, results are negative :'(.
06-Sept-2013
Due to we have been had troubles with PCRs, we decided to do genome extraction of our bacteria again. For this purpose we used Easy DNA Isolation Kit, Invitrogen. We followed manufacturer's instructions (File:Easy-DNA Kit.pdf)We confirmed the extraction by gel electrophoresis. Genomes Extracted :D
09-Sept-2013
Today we did PCR of hoxN from the new C. metallidurans genome exracted and guess what? We got hoxN a beatiful band around 600 pb :D :D.
10-Sept-2013
We did PCR of rcnR using the E. coli genome extracted last Friday and Phusion High Fidelity PCR kit. On the gel we got a diffuse band around 400 pb, so we could not conclude anything.
12-Sept-2013
We did PCR of pRcnA and rcnR again using a annealing temperature gradient between 45°C and 60° and using the two buffers: Phusion HF reaction Buffer and Phusion GC Reaction Buffer. On the gel we saw a band that corresponded to pRcnA when the annealing temperature had been around 53°C and GC buffer had been used. On the other hand, in rcnR reactions we got a band when buffer HF had been used and when annealing temperature was around 58°C.
13-Sept-2013
Today we did hoxN-rfp phusion. We used Phusion High Fidelity PCR kit, Phusion HF reaction Buffer and the amounts of other reagents described below.
| Reagent | Amount |
| rfp DNA | 2,0 ul |
| hoxN DNA | 2,0 ul |
| Primer FW | 1,0 ul |
| Primer RV | 1,0 ul |
| Buffer | 4 ul |
| dNTPs | 0,4 ul |
| DMSO | 1,0 ul |
| Pol | 0,2 ul |
| dH2O | 8,4 ul |
