Team:Valencia UPV/Project/notebook

From 2014.igem.org

(Difference between revisions)
Line 6,347: Line 6,347:
-
<img class="img_notebook" width="550px"src= http://2014.igem.org/wiki/images/8/86/20140922_Ruta_KanRes_Omega_Barnase.png>
+
<img class="img_notebook" width="550px" src= http://2014.igem.org/wiki/images/8/86/20140922_Ruta_KanRes_Omega_Barnase.png>
-
<img class="img_notebook" src= http://2014.igem.org/wiki/images/6/69/20140922_Blue_Ruta_KanRes_Bar.png>
+
<img class="img_notebook" width="550px" src= http://2014.igem.org/wiki/images/6/69/20140922_Blue_Ruta_KanRes_Bar.png>

Revision as of 16:39, 17 October 2014

Project > Notebook


Notebook




Biosynthesis under constitutive promoter


06/09/2014

The enzymes involved in the biosynthesis pathways are AtrΔ11, HarFAR, FAO1, EaDAcT.



The design of the GBlocks was performed taking into account the following considerations:

  • Codon optimization
  • Inner restriction sites eliminations by finding synonymous mutations
  • Addition of GB endings

06/10/2014

Codes for IDT known. MEGAGEM2014 - 25% off one order, up to 800 USD

GBlocks designed to be compatible with BioBricks and GoldenBraid (GB).


06/11/2014

We ordered the following gBlocks and primers.

  • EaDAcT: Eunymus alatus (adapted for GB) 1127 bp
  • HarFAR: Helicoverpa armigera (adapted for GB) 1400 bp
  • AtrΔ11: Amyelois transitella (order primers for GB) 1000 bp
    • I14Jun03 AtrΔ11 F1
    • I14Jun04 AtrΔ11 R1
  • FAO1: N. benthamiana primers
    • I14Jun01 FAO1 F1
    • I14Jun02 FAO1 R1
NameSequenceLenghtTm (NTI)Tm (Phusion)
I14Jun01_FAO1_F1cgccgtctcgctcgaatggagaaaaagagccatcc3549.962.4
I14Jun02_FAO1_R1cgccgtctcgctcgaagcttatcttgagaatttgccttcttttatc4654.563.7
I14Jun03Atr_D11_F1gcgccgtctcgctcgaatggttcctaataag3154.565.3
I14Jun04Atr_D11_R1gcgccgtctcgctcgaagctcaacgtttc295769.1

06/24/2014

We thought which parts of the GB collection could we use.

Strategy 1:

  • pP35S, pT35s (x2)
  • pAtUbq10, pTAtHSP18.2

Strategy 2:

  • pP35S, pT35s
  • pP35s, pTAtHSP18.2
  • pAtUbq10, pTAtHSP18.2

Strategy 3:

  • pP35S, pT35s
  • pP35s, pTTctp
  • pAtUbq10, pTAtHSP18.2

Pieces to take from GB2.0 colection:

pDGB2α1GB0483Kan
pDGB2α2GB0484Kan
pP35sGB0030Amp
pT35sGB0036Amp
pAtUbq10GB0223Amp
pTAtHSP18.2GB0035Amp
pTTctpGB0081Amp
pUPDGB0317Amp

Later we will need:

pDGB2Ω1GB0487Smp
pDGB2Ω2GB0488Smp

Prepare plaques with antibiotics Kan, Spm, Amp


06/25/2014

Grow the selected pieces from the GB collection in liquid medium (performed in laminar air flow cabinet).


06/26/2014

Culture in agar Petri dish. 2 plaques: Amp and Kan.

Minipreps with EZNA Plasmid DNA MiniKit I.

Expected digestions:

pP35s GB0030NotIBuffer: Orange2981, 1105
pT35s GB0036NotIBuffer: Orange2981, 304
pAtUbq10 GB0223NotIBuffer: Orange2981, 714
pTAtHSP18.2 GB0035NotIBuffer: Orange2981, 328
pTTctp GB0081NotIBuffer: Orange2981, 487

Electrophoresis analysis.

We got the expected bands in all cases.


07/01/2014

AtrΔ11 amplification by PCR with primers that contain extra nucleotides to introduce them in the sequence.

We made a PCR amplification using the AtrΔ11 gene as a template and the oligos: R +F

Reagents needed:

  • 32.5 μL of H2O miliQ
  • 10 μL HF buffer
  • 2 μL dNTPs
  • 2.5 μL Reverse primer
  • 2.5 μL Forward primer
  • 1 μL template (AtrΔ11 gene)
  • 0.5 μL phusion (polimerase)

PCR parameters: The annealing temperature was 60°C and the extension temperature was 65°C.

Electrophoresis performed to check the PCR product, which was expected to be around 1 kb.

pUPD ligation of EaDAcT, HarFar and AtrΔ11.

Reagents needed for the reaction of ligation:

  • 1 μL pUPD
  • 1 μL PCR product/gblock product
  • 1.2 μL buffer 10x
  • 1 μL BsmBI
  • 1 μL T4 ligase
  • 6.8 μL H2O miliQ

Vfinal= 12 μL

Termocycler parameters: The ligase temperature was 16°C and the BsmBI temperature was 37°C.

As a result, there are obtained three different pUPD plasmids containing the genes EaDAcT, HarFAR and AtrΔ11.


07/02/2014

E. coli transformation. This step is performed in a laminar air flow cabinet (LAF). We have used an electrocompetent E. coli strain (DH5α) and a sample from each product of ligation made in the previous step (three pUPD plasmids, each of them containing one of the three genes), so transformation is made three times.

Reagents needed:

  • E. coli aliquot
  • 1.5 μL of ligation in pUPD (for each gene: EaDAcT, HarFAR, AtrΔ11)

Each mix is introduced in a electroporation vial and electroporated at 1500 V, then 300 μL of SOC are added to each vial. All of them were incubated at 37°C for 1 hour.

After incubation, culture in Petri plates (always in a LAF).

2 cell-culture dishes per transformation (with Ampicillin), one with 50 μL and the other with the remaining volume.

Petri plates are incubated at 37°C for 16 h.


07/03/2014

Transformed colonies selection. The white ones are recultured in liquid medium. One colony of each transformation is picked and cultured in 3.5 mL LB and 7 μL Amp. This step is repeated three times:

  • 3x 1 colony of EaDAcT in pUPD + LB + Amp
  • 3x 1 colony of HarFAR in pUPD + LB + Amp
  • 3x 1 colony of AtrΔ11 in pUPD + LB + Amp

All tubes are incubated at 37°C overnight in agitation.


07/04/2014

Digestions in silico using Vector NTI to check after minipreps if ligations are correct.

EaDAcTNotI2981, 1167
RsaI1876, 1343, 532, 306, 91
HarFARNotI2981, 1440
PvuII2564, 1394, 463
AtrΔ11NotI2981, 1056
BanII2570, 803, 351, 314

Digestion reagents:

  • 0.5 μL restriction enzyme
  • 2.5 μL buffer
  • 21 μL H20 (miliQ)
  • 1 μL sample

Preparation of master mixes

  • Master mix for NotI
    • 5 μL NotI
    • 25 μL Orange
    • 210 μL H20
  • Master mix for RsaI
    • 1.5 μL RsaI
    • 7.5 μL Tango
    • 63 μL H20
  • Master mix for PvuII
    • 1.5 μL PvuII
    • 7.5 μL Green
    • 63 μL H20
  • Master mix for BanII
    • 1.5 μL BanII
    • 7.5 μL Tango
    • 63 μL H20

Perform electrophoresis to check if the size of the fragments from the digestions is correct.

Comments:

  • We picked blue colonies instead of white by mistake. We need to pick colonies again but this time make sure we pick white colonies.
  • For the repetition we must find another enzyme instead of BanII as we found out that it doesn't cut very well.

07/06/2014

We picked again 3 colonies for each construction, and we made sure that we picked the WHITE ones. We cultivated them in a "double check" (name invented by us) liquid medium. Those tubes contain:

  • 3.5 mL LB
  • 7 μL Amp
  • 7 μL X-Gal
  • 3.5 μL IPTG (turns the tube blue if the colonies picked were blue)

07/07/2014

We made minipreps of yesterday's culture. Thanks to our "double check" medium we found which colonies were well picked. Finally we had minipreps of tubes HarFAR 1, 2, 3; EaDAcT 3 and AtrΔ11 2, 3.

Once we had the minipreps, we perform the digestions to check which were correct and send them to sequencing. This time we selected RsaI instead of BanII. The in silico digestions were as follows.

EaDAcTNotI2981, 1167
RsaI1876, 1343, 532, 306, 91
HarFARNotI2981, 1440
PvuII2564, 1394, 463
AtrΔ11NotI2981, 1056
RsaI1879, 1310, 467, 327, 54

Preparation of master mixes

  • Master mix for NotI
    • 3.5 μL NotI
    • 17.5 μL Orange
    • 147 μL H20
  • Master mix for RsaI
    • 2 μL RsaI
    • 10 μL Tango
    • 84 μL H20
  • Master mix for PvuII
    • 2 μL PvuII
    • 10 μL Green
    • 84 μL H20

We run the electrophoresis gel to check if this time we have done it correctly.

Everything was OK. We sent AtrΔ11 (3), HarFAR (3) and EaDAcT (3) to sequence.


07/08/2014

Now, while we wait for sequencing results, we go on as they were going to be correct in order to save time.

The next step is to build a transciptional unit (TU) with our sequences. A transcriptional unit is a structure composed by promoter, coding sequence (CDS) and terminator in an α or Ω vector.

Reagents needed for ligation:

  • 1 μL promoter 75 ng/μL
  • 1 μL terminator 75 ng/μL
  • 1 μL CDS 75 ng/μL
  • 1 μL vector α
  • 1.2 μL ligase buffer 10x
  • 1 μL T4
  • 1 μL BsaI
  • 4.2 μL H20

Total: 12 μL

Take into account that if we want to make binary constructions later (merge 2 TU in a same vector), we need to clone each TU in a different α vector.

Strategy Promoter-Terminator:

AtrΔ11P35sT35s40.41
HarFARP35sTatHSP39.68
EaDAcTPAtUbqTatHSP32.27

Adjust concentrations to 75 ng/μL for ligation reaction

Initial concentrations (nanodrop):

PieceConcentrationsVolumeVolume of H20 to add
PAtUpb442.6 ng/μL34 μL166.6 μL
pTatHSP235.4 ng/μL36 μL77 μL
T35s194.9 ng/μL37.5 μL60 μL
P35s454.7 ng/μL36 μL182 μL
2α157.1 ng/μL-We will need to put 1.5 μL of this one
2α2104.0 ng/μL38 μL14.7 μL
AtrΔ11359.3 ng/μL20 μL75.8 μL
HarFAR404.4 ng/μL15 μL65.9 μL
EaDAcT155.6 ng/μL10 μL10.7 μL

Ligation reaction

  • P35s:AtrΔ11:T35s in 2α1
    • 1 μL P35s
    • 1 μL T35s
    • 1 μL AtrΔ11
    • 1.5 μL 2α1
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 3.7 μL H20
  • P35s:HarFAR:TatHSP in 2α2
    • 1 μL P35s
    • 1 μL TatHSP
    • 1 μL HarFAR
    • 1 μL 2α2
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 4.2 μL H20
  • PAtUbq:EaDAcT:TatHSP in 2α2
    • 1 μL PAtUbq
    • 1 μL TatHSP
    • 1 μL EaDAcT
    • 1 μL 2α2
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 4.2 μL H20

07/09/2014

Transformation of constructions in E. coli

We finally got the sequencing results from 07/07/2014.

  • Mutation in AtrΔ11 -> We threw away the colonies and transformed cells. We picked again white colonies.
  • HarFAR -> Sequencing correct
  • EaDAcT -> Synonim mutation in 601 (A -> T). This is a gBlock!

We took vectors 2Ω1 (GB0487) and 2Ω2 (GB0488) parts from the GB colection.

  • Worked in the LAF
  • Cultivated in a Petri dish with Spm
  • Let them grow for one day

Cultivate transformated cells in two Kan plaques (Kan matches vector α)

  • 50 mL transformation in one plaque
  • Rest of the culture in another (250 μL aprox)
  • Let them grow for one day

07/10/2014

Pick colonies and grow them in liquid medium.

  • 6 from AtrΔ11 (repetition because of mutation)
    • 3.5 mL LB
    • 7 μL Amp
    • 7 μL X-gal
    • 3.5 μL IPTG
  • 1 colony from 2Ω1
    • 3.5 mL LB
    • 7 μL Spm
  • 1 colony from 2Ω2
    • 3.5 mL LB
    • 7 μL Spm
  • 3 colonies from P35s:HarFAR:TatHSP
    • 3.5 mL LB
    • 7 μL Kan
  • 3 colonies from PAtUbq:EaDAcT:TatHSP
    • 3.5 mL LB
    • 7 μL Kan

Grow at 37°C in agitation overnight.

We have checked the promoters and terminators are both compatible with GB and BioBricks.

Only P35s and T35s work for both. pPnos could also work.

Pick 3 colonies of P35s:HarFAR:THsp and PAtUbq:EaDAcT:THsp. Culture in liquid medium with Kan.


07/11/2014

We made minipreps of yesterday's liquid culture. Thanks to our "double check" medium we found which colonies were well picked. Finally we had minipreps of tubes AtrΔ11 3 and 6; 2Ω1; 2Ω2; constructions P35s:HarFAR:TatHSP 1, 2, 3 and PAtUbq:EaDAcT:TatHSP 1, 2, 3.

Additionally, we have cultured each of the colonies named above to store them.


07/14/2014

We tested the minipreps made last friday by digestion. Once they were checked, we send the correct ones to sequencing. The in silico digestions were as follows.

PartsRetriction enzymeExpected Bands
PAtUbq:EaDAcT:TatHSP in 2α2HindIII6322, 1722, 736, 221
P35s:HarFAR:TatHSP in 2 α2HindIII6322, 1794, 221
AtrΔ11NotI2961, 1056
2Ω1BamHI6652, 382, 239
2Ω2EcoRV6652, 621

Preparation of master mixes

  • Master mix for HindIII
    • 3.5 μL HindIII
    • 17.5 μL Red
    • 147 μL H20
  • Master mix for NotI
    • 1.5 μL NotI
    • 7.5 μL Orange
    • 63 μL H20
  • Mix for EcoRV
    • 0.5 μL EcoRV
    • 2.5 μL Red
    • 21 μL H20
  • Mix for BamHI
    • 0.5 μL PvuII
    • 2.5 μL Green
    • 21 μL H20

We run the electrophoresis gel to check if this time we have done it correctly.

Everything was OK except the AtrΔ11 (3), which had some partial digestion. It was the reason we sent AtrΔ11 (6) to sequence.


07/15/2014

We got the sequencing results from yesterday and everything was OK, so we made the transcriptional units ligation.

Reagents needed for the reaction of ligation (Total volume = 12 μL):

  • P35s:AtrΔ11:T35s in 2α1
    • 1 μL P35s
    • 1 μL T35s
    • 1 μL AtrΔ11
    • 1.5 μL 2α1
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 3.7 μL H20
  • P35s:HarFAR:T35s in 2α2
    • 1 μL P35s
    • 1 μL T35s
    • 1 μL HarFAR
    • 1 μL 2α2
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 4.2 μL H20
  • P35s:EaDAcT:T35s in 2α2
    • 1 μL P35s
    • 1 μL T35s
    • 1 μL EaDAcT
    • 1 μL 2α2
    • 1.2 μL ligase buffer 10x
    • 1 μL T4
    • 1 μL BsaI
    • 4.2 μL H20

Note: Concentrations were previously adjusted to 75 ng/μL. Only the AtrΔ11 was adjusted from 250.2 ng/μL.

Finally, we prepared liquid cultures in order to store in glicerol. The tubes we used and their respective antibiotics were:

  • Amp
    • pAtrΔ11 (6)
    • pEaDAcT (3)
    • pHarFAR (3)
  • Kan
    • P35:HarFAR:TatHSP in 2α2 (3)
    • PPAtUbq:EaDAcT:TatHSP in 2apha2 (3)

07/16/2014

Storage in glycerol of the HarFAR (GB1018), AtrΔ11 (GB1019), EaDAcT (GB1020), P35s:HarFAR:TatHSP in 2α2 (GB1021) and PAtUbq:EaDAcT:TatHSP in 2α2 (GB1022). We made 3 tubes: one for us, one for the GB collenction and one for reserve.

The procedure is to mix 700 μL of culture with 300 μL of glycerol 50%, spin it and store it in the -80°C.


07/17/2014

Pick 3 colonies of P35s:AtrΔ11:T35s, P35s:HarFAR:T35s and P35s:EaDAcT:T35s. Culture in liquid medium with Kan.

Digestions in silico.

Transcriptional unitsRestriction enzymesExpected bands
P35s:AtrΔ11:T35sEcoRI6323, 2269
NcoI390, 8202
P35s:HarFAR:T35sHindIII933, 6322, 1722
NcoI8587, 390
P35s:EaDAcT:T35sHindIII6322, 2366
EcoRV683, 8021

Preparation of reagents needed for genomic extraction of Candida tropicalis for FAO1.


07/18/2014

Mistake in P35s:AtrΔ11:T35s, P35s:HarFAR:T35s and P35s:EaDAcT:T35s minipreps. Repeat tomorrow.


07/19/2014

Minipreps of P35s:AtrΔ11:T35s, P35s:HarFAR:T35s and P35s:EaDAcT:T35s. Concentration measuments with nanodrop.

Transcriptional unit DNA concentration
P35s:AtrΔ11:T35s (1)164 ng/μL
P35s:AtrΔ11:T35s (2)168 ng/μL
P35s:AtrΔ11:T35s (3)147.4 ng/μL
P35s:HarFAR:T35s (1)125.3 ng/μL
P35s:HarFAR:T35s (2)114.5 ng/μL
P35s:HarFAR:T35s (3)140.3 ng/μL
P35s:EaDAcT:T35s (1)144.2 ng/μL
P35s:EaDAcT:T35s (2)137.9 ng/μL
P35s:EaDAcT:T35s (3)128.5 ng/μL
Stuffer fragment135.5 ng/μL
2Ω1196.8 ng/μL
2Ω2175.4 ng/μL

Digestions of P35s:AtrΔ11:T35s, P35s:HarFAR:T35s and P35s:EaDAcT:T35s and gel electrophoresis to check if transciptional units have been assembled OK.

All digestions were correct except P35s:EaDAcT:T35s (2).

Ligation in Ω vectors.

  • P35s:AtrΔ11:T35s + P35s:HarFAR:T35s in 2Ω1
    • 1 μL P35s:AtrΔ11:T35s (75 ng/μL)
    • 1 μL P35s:HarFAR:T35s (75 ng/μL)
    • 1 μL 2Ω1 (75 ng/μL)
    • 1 μL BsmBI (5-10 ud)
    • 1 μL T4 ligase (5-10 ud)
    • 1 μL buffer ligase (3 ud)
    • 4 μL H20
  • P35s:EaDAcT:T35s in 2Ω2
    • 1 μL stuffer fragment (75 ng/μL)
    • 1 μL P35s:EaDAcT:T35s (75 ng/μL)
    • 1 μL 2Ω2 (75 ng/μL)
    • 1 μL BsmBI (5-10 ud)
    • 1 μL T4 ligase (5-10 ud)
    • 1 μL buffer ligase (3 ud)
    • 4 μL H20

Set the reaction: 25 cycles x (37°C 2 min, 16°C 5 min).

Omega vectors include a resistance to spectinomycin.


07/20/2014

Transform and grow in Petri dishes yesterday's ligations: P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω1 and P35S:EaDAcT:T35S in 2Ω2.


07/21/2014

Pick colonies of P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω1 (3) and P35S:EaDAcT:T35S in 2Ω2 (2).


07/22/2014

We made minipreps of yesterday's liquid culture. Selected tubes:

  • P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω1(Tubes 1, 2 and 3)
  • P35S:EaDAcT:T35S in 2Ω2 (Tubes 1 and 2)

Digestions in silico made to check the transcriptional units:

Transcriptional unitsRestriction enzymeExpected bands
P35S:AtrΔ11:T35S+P35S:HarFAR:T35S in 2Ω1EcoRV9307, 2251
BamHI6652, 4906
P35S:EaDAcT:T35S in 2Ω2EcoRV6652, 1044, 817, 683
NcoI8806, 390

Digestion master mixes:

  • Master mix for NotI
    • 1.5 μL NotI
    • 7.5 μL Orange buffer
    • 63 μL H20
  • Master mix for NcoI
    • 1.5 μL NcoI
    • 7.5 μL Tango buffer
    • 63 μL H20
  • Master mix for BamHI
    • 2 μL BamHI
    • 10 μL Green buffer
    • 84 μL H20
  • Master mix for EcoRV
    • 4 μL EcoRV
    • 20 μL Red buffer
    • 168 μL H20

Note: Trichome promoter digestion preparation included.

All digestions were correct except the transcriptional unit of EaDAcT in 2Ω2 (P35s:EaDAcT:T35S).

Miniprep quantification:

PieceTubeConcentration (ng/μL)Volume (μL)
P35S:EaDAcT:T35S in 2Ω21350.733
P35S:EaDAcT:T35S in 2Ω22271.133
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω11306.331
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω12296.628
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω13246.033

All of the pieces named above were adjusted at 75 ng/μL.

Piece Tube numberFinal Volume (μL)Volume to be added (μL)
P35S:EaDAcT:T35S in 2Ω21154.30121.3
P35S:EaDAcT:T35S in 2Ω22119.3086.30
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω11126.6095.60
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω12110.7082.70
P35S:AtrΔ11:T35S + P35S:HarFAR:T35S in 2Ω13108.2475.20

As the digestions of the transcriptional unit (TU) of EaDAcT were incorrect, we repeated the process from the ligation step.

We transformed the same TU in a E. coli competent strain (DH5α). Then, the transformants were cultured in LB media and Spm and stored at 37°C overnight.

Finally, in order to obtain the FAO1 gene, we want to extract the Candida tropicalis genome, so we have picked a colony of C. tropicalis. To check the extraction protocol, we used a yeast previously tested, Saccharomyces cerevisiae. We have cultured C. tropicalis in YPD media and S. cerevisiae in YPDA media at 28 °C (5 mL).


07/23/2014

Candida genome extraction

Saccharomyces cerevisiae is used as a control in order to see if we followed the protocol correctly. We aren't really sure if this protocol is going to work in Candida.

Cultures measured at 600 nm:

  • S. cerevisiae Abs = 1.07
  • C. tropicalis Abs = 0.39

S. cerevisiae is recultured with new media (1:2) because the previous media was saturated. 2.25 mL of YPD media were mixed with 2.25 mL of S. cerevisiae culture. The mix has to grow at 28 °C until the exponential phase is reached.

The absorbance was measured again:

  • S. cerevisiae Abs = 0.52
  • C. tropicalis Abs = 0.40

Buffers needed for the genome extraction were prepared freshly.The genome of both strains of yeast were extracted following the protocol:

  • Grow yeast in 2 or 5 mL YPD to exponential phase.
  • Collect cells in 1.5 mL eppendorf-cup (centrifugation 20 s, 6000 rpm).
  • Wash once with 1 mL sterile water.
  • Resuspend cells in 200 μL protoplast-buffer (100 mM Tris-HCl, pH 7.5, 10 mM EDTA, 1000 units Zymolyase/mL, 10 μL beta-mercaptoethanol/mL; prepare freshly!). Incubate at 37°C for 1-2 h and finally resuspend by turning the cups.
  • Add 200 μL of Lysis-Mix (0.2 M NaOH, 1% SDS) an mix carefully (Don't vortex!).
  • Incubate at 65 °C for 20 min and cool inmediately on ice.
  • Add 200 μL of 5 M KAc (pH 5.4) and mix carefully (Don't vortex!) and incubate 15 min on ice.
  • Centrifuge (13,000 rpm, 3 min) and transfer supernatant in a fresh cup.
  • Add 2 μL RNase A (10 mg/mL) and incubate at 37 °C for 30 min.
  • Add 600 μL isopropanol and mix carefully (Don't vortex!). Incubate at room temperature for 5 min ad centrifuge (13,000 rpm, 30 s).
  • Remove the supernatant and wash with 70% ethanol (10 min at room temperature).
  • Centrifuge (13,000 rpm, 30 s) and remove the supernatant.
  • Dry DNA pellet in a speed-vacuum (not longer than 3 min!) and resuspend in 50 μL TE-buffer.
  • Store chromosomal DNA at 4 °C (Don't freeze!). Concentration and quality can be checked in an agarose gel (loading 1/10 of the volume).

Genomic quantification:

OrganismConcentration
S. cerevisiae72.2 ng/μL
C. tropicalis1397.1 ng/μL

Electrophoresis made to check the extraction quality was correct.

We did not observe genomic from Candida because we used a very diluted sample. We will repeat the gel tomorrow.

We picked EaDAcT colonies.


07/24/2014

The genomic quality of both organisms (C. tropicalis and S. cerevisiae) was checked in an agarose gel again.

We got the Candida genome band, however, the Saccharomyces genome band was not present.

Additionally, minipreps of the liquid culture made yesterday were made and also recultured in solid agar plate.

Miniprep digestions are going to be done tomorrow.


07/25/2014

Digestions in silico made for checking yesterday's minipreps:

Pieces/TURestriction enzymeExpected bands
P35S:EaDAcT:T35S in 2Ω2EcoRV6652, 1044, 817, 683
NcoI8806, 390

Digestion master mixes:

  • Master mix for NotI
    • 2 μL NotI
    • 10 μL Orange buffer
    • 84 μL H20
  • Master mix for NcoI
    • 2 μL NcoI
    • 10 μL Tango buffer
    • 84 μL H20
  • Master mix for BglII
    • 2 μL BglII
    • 10 μL Orange buffer
    • 84 μL H20
  • Master mix for EcoRV
    • 1.5 μL EcoRV
    • 7.5 μL Red buffer
    • 63 μL H20

An agarose gel was made to check the transcriptional unit and the other pieces:

All pieces were correct except the TU corresponding to P35:EaDAcT:T35S.


07/28/2014

Once the Candida tropicalis genome DNA is obtained, the FAO1 gene can be amplified by PCR.

PCR reaction reagents:

  • FAO1-PCR1
    • Genomic 0.5 μL
    • Buffer HF (5X) 10.0 μL
    • dNTPs 2.0 μL
    • Oligo R (JUL06) 2.5 μL
    • Oligo F (JUL05) 2.5 μL
    • Phusion polymerase 0.5 μL
    • H2O 32.0 μL
  • FAO1-PCR2
    • Genomic 0.5 μL
    • Buffer HF (5X) 10.0 μL
    • dNTPs 2.0 μL
    • Oligo R (JUL08) 2.5 μL
    • Oligo F (JUL07) 2.5 μL
    • Phusion polymerase 0.5 μL
    • H2O 32.0 μL

Annealing temperatures

  • FAO1-PCR1: 59 °C
  • FAO1-PCR2: 64 °C

PCR products were checked using an electrophoresis. Expected bands:

  • FAO1-PCR1: 1157 bp
  • FAO1-PCR2: 1015 bp

Both FAO1 PCR products were not correct.

As the EaDAcT TU was not correct, ligation reaction was done again. The following table shows ligation details:

ReagentVolume
Trichome promoter1 μL
GFP1 μL
TNos1 μL
BsaI1 μL
p2α21 μL
T4 ligase1 μL
Ligase buffer1 μL
H2O3 μL
Total Volume10 μL

07/29/2014

As the FAO1 PCR was not correct, we repeated the reaction. Below is a table showing the details:

ReagentFAO1-PCR1FAO1-PCR2
C. tropicalis genome2.5 μL2.5 μL
HF Buffer30 μL30 μL
dNTPs10 μL10 μL
Oligo R12.5 μL12.5 μL
Oligo F12.5 μL12.5 μL
Phusion polymerase1.5 μL1.5 μL
H2O181 μL181 μL

PCR temperatures, 25 cycles:

StepTemperature (°C)Time
Initialization982 min
Denaturation9820 s
Annealing50, 55, 60, 65??
Extension7245 s
Final elongation727 min

We made a mistake preparing the FAO1-PCR1 adding the wrong template, so we do not expect the correct FAO11-PCR1 product.

EaDAcT Transcriptional Unit (TU) transformation

Using an electrocompetent E. coli strain (DH5α) and 1.5 ul ligation (P35s:EaDAcT:T35s in 2Ω2), the mix is electroporated at 1500 V. Then, 300 μL of SOC are added and stored at 37°C with agitation.


07/30/2014

Transform P35s:AtrΔ11:T35+P35s:HarFAR:T35 and P35s:EaDAcT:T35s (in 2α2) in Agrobacterium tumefaciens strain C58. Introduce 1 μL of construction in a C58 aliquot. Electroporate at 1440V. Add 500 μL of LB in the LAF. Keep 2 hours in agitation at 28°C. Grow 20 μL and 200 μL in solid medium containing kanamicin and rifampicin. Incubate overnight at 28°C.

Pick colonies of P35s:EaDAcT:T35s in 2Ω2.


08/01/2014

Pick colonies from Agrobacterium tumefaciens and grow them in liquid medium for two days at 28°C. Liquid medium is composed by 5 mL LB, Rif (1:1000) and Kan (1:1000) for α vectors and 5 mL LB, Rif (1:1000) and Spm (1:1000) for Ω vectors.


07/31/2014

Minipreps of yesterday's culture were made, obtaining the transcripional unit: P35S:EaDAcT:T35S in 2Ω2

Additionally, we recultured in petri dish with its respective antibiotic (Spm).

Digestions in silico made for checking minipreps:

Pieces/TURestriction enzymeExpected bands
P35S:EaDAcT:T35S in 2Ω2NcoI8806, 390
EcoRV6652, 1044, 817, 683

Digestion mixes:

  • Master mix for EcoRV:
    • 3 μL EcoRV
    • 15 μL Red buffer
    • 126 μL H20
  • Master mix for NcoI:
    • 1.5 μL NcoI
    • 7.5 μL Tango buffer
    • 63 μL H2O

Note: We made master mixes because digestions were made simultaneously with the trichome promoter part.

An agarose gel was made to check the transcriptional unit.

Minipreps of P35s:EaDAcT:T35s in 2Ω2 (1) went correctly.

Miniprep results were quantified and then adjusted at 75 ng/μL:

Pieces/TUTubeConcentration (ug/μL)Initial volume (μL)Final Volume (μL)
P35S:EaDAcT:T35S in 2Ω2(1)141.43531
P35S:EaDAcT:T35S in 2Ω22)3.933(Discarded)

Ligation of P35s:EaDAcT:T35s in 2Ω2 with P35s:AtrΔ11:T35+P35s:HarFAR:T35 in 2Ω1.

  • 1 μL P35s:AtrΔ11:T35+P35s:HarFAR:T35 in 2Ω1
  • 1 μL P35s:EaDAcT:T35s in 2Ω2
  • 1 μL 2α1
  • 1 μL BsaI
  • 1 μL T4 ligase
  • 1 μL ligase buffer
  • 4 μL H20

08/04/2014

Transformation of P35s:EaDAcT:T35s in 2Ω2 P35s:AtrΔ11:T35+P35s:HarFAR:T35 in E. coli.

Agrobacterium liquid cultures (5 mL LB)

  • P35s:GFP:p19:Tnos (Spm, Tet, Rif)
  • Empty C58 Agrobacterium tumefaciens (Rif)
  • 2x P35s:EaDAcT:T35s in 2α2 (Rif, Kan)
  • 2x P35s:AtrΔ11:T35+P35s:HarFAR:T35 in 2Ω1 (Rif, Spm)

08/05/2014

Pick colonies from P35s:AtrΔ11:T35+P35s:HarFAR:T35+P35s:EaDAcT:T35s in 2α1.

Repeat PCR of FAO1.

  • FAO1-PCR1: 3 reactions at different temperatures (54, 59, 64°C)
    • 1.75 μL Candida tropicalis genomic
    • 35 μL HF buffer (5x)
    • 7 μL dNTPs
    • 8.75 μL oligo forward (Jul07)
    • 8.75 μL oligo reverse (Jul08)
    • 1.05 μL Phusion polymerase
    • 112.7 H20

PCR temperatures, 35 cycles:

StepTemperature (°C)Time
Initialization982 min
Denaturation9810 s
Annealing54, 59, 6455 s
Extension7255 s
Final elongation727 min
  • FAO1-PCR2: touchdown PCR
    • 0.5 μL Candida tropicalis genomic
    • 10 μL HF buffer (5x)
    • 2 μL dNTPs
    • 2.5 μL oligo forward (Jul09)
    • 2.5 μL oligo reverse (Jul10)
    • 0.5 μL Phusion polymerase
    • 32 μL H20

PCR temperatures, 35 cycles:

StepTemperature (°C)Time
Initialization985 min
Denaturation9810 s
Annealing69.5 (descending 0.5 per cycle) 20 s
Extension7255 s
Final elongation727 min

It is not working yet. For the next time we are going to repeat the dilutions in case they weren't correctly done.


08/06/14

Minipreps of yesterday's culture were made:

  • TU AtrΔ11 + TU HarFAR + TU EaDAcT

Additionally, we made Agrobacterium' culture minipreps using a different kit (We used the QIAgen Miniprep kit 250, 27106)

  • TU AtrΔ11 + TU HarFAR in 2Ω1
  • P35S:EaDAcT:T35S in 2Ω2

FAO1 PCR was repeated (this time using a different primers aliquot).

  • FAO1-PCR1:
    • 0.5 μL Candida tropicalis genomic
    • 10 μL HF buffer (5x)
    • 2 μL dNTPs
    • 2.5 μL oligo forward (Jul07)
    • 2.5 μL oligo reverse (Jul08)
    • 0.5 μL Phusion polymerase
    • 32 μL H20
  • FAO2-PCR1:
    • 0.5 μL Candida tropicalis genomic
    • 10 μL HF buffer (5x)
    • 2 μL dNTPs
    • 2.5 μL oligo forward (Jul09)
    • 2.5 μL oligo reverse (Jul10)
    • 0.5 μL Phusion polymerase
    • 32 μL H20

PCR temperatures, 35 cycles:

StepTemperature (°C)Time
Initialization982 min
Denaturation9810 s
Annealing59 (PCR1)/ 64 (PCR2) (descending 0.5 per cycle) 20 s
Extension7255 s
Final elongation727 min

Digestions made in silico to check minipreps:

E. coli

Pieces/TUResriction enzymesBufferExpected Bands
TU AtrΔ11+ TU HarFAR + TU EaDAcT in 2α1EcoRIOrange7428, 6323
TU AtrΔ11+ TU HarFAR + TU EaDAcT in 2α1BglIIOrange11175, 2576

A. tumefaciens

Pieces/TUResriction enzymesBufferExpected Bands
TU AtrΔ11 + TU HarFAR in 2Ω1EcoRVRed9307, 2251
TU AtrΔ11 + TU HarFAR in 2Ω1BamHIGreen6652, 4906
TU EaDAcT in 2α2EcoRVRed8021, 683
TU EaDAcT in 2α2HindIIIRed6322, 2382

Digestion master mixes:

  • Master mix for NotI:
    • 2.5 μL NotI
    • 12.5 μL Orange buffer
    • 105 μL H20
  • Master mix for RsaI:
    • 2 μL NcoI
    • 10 μL Tango buffer
    • 84 μL H2O

Note: We made master mixes because digestions were made simultaneously with the switch part.

We made different mixes for Agrobacterium samples because we think that minipreps are not as good as it is expected.

  • Agrobacterium sample mix:
    • 0.5 μL Restriction enzyme
    • 2.5 μL Buffer
    • 5 μL Miniprep sample
    • 17 μL H2O

Digestions in A. tumefaciens.

FAO1 PCR product.

All digestions and TU AtrΔ11+ TU HarFAR + TU EaDAcT in 2α1 were correct. PCR products were not correct or absent again.

As digestions were correct, we recultured Agrobacterium in new media (LB) in order to have cultures in exponential phase for tomorrow. We mix in each tube 5 mL of LB with 40 μL of inoculum, XGal (2:1000), IPTG (1:1000)and the corresponding antibiotic (1:1000).

CultureAntibiotic
P35:GFP:P19:TNosSpm, Tet, Rif
Agrobacterium (as a control)Rif
P35S:EaDAcT:T35S Rif, Kan
P35S:AtrΔ11:T35S + P35S:HarFAR:T35SRif, Spm

Recultured media was grown at 28 °C overnight (around 16 h).


08/07/2014

Agroinfiltration in Nicotiana benthamiana.

  • Agrobacterium control culture and P35s:GFP:P19:Tnos (x2 forth true leaves)
  • TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos (x2 forth true leaves)
  • TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos (x2 forth true leaves)

Agroinfiltration protocol consists of:

  • Centrifuge the cultures 15 min 3000 rpm and discard supernatant.
  • 5 mL of agroinfiltration solution per culture. 100 mL of agroinfiltration solution were composed of 10 mL MES 100mM (pH 5.6), 1 mL MgCl2 1M and 100 μL acetosyringone solution 200 mM (19.62 mg, DMSO 500 μL; prepare freshly). Mix it with the vortex. If the culture is still turbid, add a bit more of agroinfiltration sollution. Put it in the (rodillos) for two hours.
  • Measure the OD. The optimum OD for agroinfiltration is 0.2. If it is too high adjust the concentration with more agroinfiltration solution.
  • Mix the cultures, keeping all of them in the same proportions.
  • Proceed to agroinfiltration.

08/08/2014

In order to have a control for the FAO1 PCR, which hasn't been very successful, Jesus Munoz provided us with 4 primers and 2 clones of Candida tropicalis (C981 ng/μL and pYEP C98 28.2 ng/μL). These primers amplify for the gene HSR1.

Name Sequence Tm
HSR1 RTRv+1149TTTGTCTTGCAACAGGTCCA56°C
HSR1 clone Fw+1 ATGAGTAAGAAAAGCAACAGTACC54°C
HSR1 fw-BamHI+480GCTGGATCCTTAGTAGTAGTGGATCAAGGAAT49°C (annealing)
HSR1 clone RV+stopCTAATTTTCTTCTTTTTCAATAGTAACTATCC51°C

Possibility of primer combinations:

AHSR1 fw-BamHI+480HSR1 RTRv+114968749°C
CHSR1 clone Fw+1HSR1 clone RV+stop2187-
BHSR1 RTRv+1149HSR1 clone Fw+1 116854°C

We amplified the genomic of C. tropicalis and the two clones (C98 and C98 pYep)with the primer combinations A and B with Taq polymerase at 2 different temperatures (49 and 52°C). C primer combination was not used due to the length of the spected band.

PCR parameters

  • 94°C, 3 min
  • 35 cycles
    • 94°C, 30 s
    • 49 or 52°C, 15 s
    • 72°C, 90 s
  • 72°C, 7 min

PCR products were not present. It probably did not work because we added to much buffer.


08/11/2014

We obtained a different plasmid (pUbiquitina HSRI-CDS col.6) as a positive control of PCR to check the quality of our Candida genome. We diluted them to obtain a final concentration of 30 ng/μL.

PCRs wih Taq polimerase:

  • 1 μL Template
  • 1.5 μL dNTPs
  • 1 μL Forward primer
  • 1 μL Reverse primer
  • 1 μL Taq pol.
  • 5 Buffer 10X
  • 39.5 μL H2O
PCRTemplateF primerR primer
1pUbiquitina HSRI-CDS col.6HSR1 BamHI + 480HSR1 RTRev + 1149
2pUbiquitina HSRI-CDS col.6HSR1 RTRv + 1149HSR1 Fw + 1
3C. tropicalis genomeHSRI-CDS col.6HSR1 BamHI + 480HSR1 Rtrev + 1149
4C. tropicalis genomeHSR1 RTRv + 1149HSR1 Fw + 1

PCR conditions:

  • 94°C 3 min
  • 35 cycles
    • 94°C 30 s
    • 49°C 15 s
    • 72°C 90 s
  • 72°C 7 min

We had amplification in our positive controls. Our C. tropicalis genome may be wrong. Therefore Jesús Muñoz provided us with a new Candida tropicalis (NCYC 2512) culture and also a culture from a Candida tropicales genoteque made in E. coli.


08/12/2014

PHEROMONE ANALYSIS


PONER ENLACE DE LA WIKI

To begin with samples were obtained from the agroinfiltrated plants after 5 days. We collected 9 samples:

  • 2 leaves from P35s:GFP:P19:Tnos
  • 2 leaves from TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos
  • 2 leaves from TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos
  • 1 leaf from a wild type plant

Each sample was stored in a vial and kept in liquid nitrogen. Leaves were mashed using a mortar and liquid nitrogen until powder from each leaf is obtained and stored in a vial .Samples must be always kept in liquid nitrogen or in a -80°C freezer . Afterwards the leaf powder was weighted and introduced in a 10 mL screwcap headspace vial.

  • 94,6 mg of P35s:GFP:P19:Tnos leaf (replica 1)
  • 97,0 mg of TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos leaf (replica 2)
  • 118,7 mg of TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos leaf (replica 1)
  • 100,0 mg of wild type leaf

Then 150 μL of EDTA 500mM and 1 mL of a saturated solution of CaCl2 (5,7M) were added to each vial.

EDTA 500mM preparation:

Stock of solid EDTA Di-Sodium 372,24 Mw and a final solution of 50 mL, 500mM. 372,24*0,5*0,05=9,306 g in 50 mL.

After the addition of EDTA and CaCl2 the samples were sonicated dutring 5 minutes to disgregate the tissue and release the volatile compounds. Afterwards the samples were analysed by GC-MC following this procedure.


PONER LOS PASOS QUE SIGUE EL PARATO, provided by JOSE LUIS MAS ADELANTE: el protocolo entero est\E1 en la carpeta de protocolos como volatile analysis protocol

Analysis was performed overnight.


08/13/2014

First results of the analysis were obtained. The analysis proved that our plant was successfuly producing the desired pheromones in high concentration. As expected z-11-hexadecen-1-ol and z-11-hexadecen-1-ol acetate were being produced and also unexpectedly the z-11-hexadecenal.

As shown in the figure, the leaf agroinfiltrated with TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos (represented in black) shows a successful production of (Z)-11-hexadecen-1-ol compared with the negative control that only has P35s:GFP:P19:Tnos (represented in blue) and shows no expression.

In this figure, expression of (z)-11-hexadecen-1-ol and (z)-11-hexadecen-1-ol acetate is proved. The expression in the leaf infiltrated with TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos is represented in black, and the negative control with P35s:GFP:P19:Tnos is represented in blue.

In this figure, an unexprected peak present in the leaf infiltrated with TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos (black) can be observed. Comparing its spectrum with the one provided from the database seems to be (z)-11-hexadecenal, a desired pheromone, which is being produced by the plant itself using an endogenous alcohol oxidase. Nevertheless as it is produced with a low yield, the FAO1 of C. tropicalis search is still in progress.

The rest of the samples were prepared for the GC-MS analysis.

The samples were weighted, introduced in the vial and added with EDTA and CaCl2.

  • 94,0 mg of P35s:GFP:P19:Tnos leaf (replica 2)
  • 102,4 mg of TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos leaf (replica 1)
  • 92,0 mg of TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos leaf(replica 2)

Results of the replicae analysis are shown below:

In this replica, the sample with the TU AtrΔ11+TU HarFAR and P35s:GFP:P19:Tnos construction shows a huge production of (z)-11-hexadecen-1-ol.

In this replica, the sample with the TU AtrΔ11+TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos shows a higher abundance of (z)-11-hexadecen-1-ol and z-11-hexadecen-1-ol acetate.

In order to verify that the analysed compounds are the desired pheromones, we acquired standards for (z)-11-hexadecen-1-ol and (z)-11-hexadecen-1-ol acetate and (z)-11-hexadecenal, and indeed, the analysed compunds were the right ones.

Our happiness reached a peak!! A PEAK!


08/14/2014

We had problems to amplify the FAO1 gene, so in order to obtain it we performed a colony PCR. Using this method, it is possible to amplify a fragment directly from a colony rather than a DNA sample.

We made two different PCRs, one of them as a positive control and the other one to amplify our disered DNA fragment.

Colony PCR protocol (Taq Polimerase):

  • 1 colony (C. tropicalis)
  • 1.5 μL dNTPs
  • 1 μL Forward Primer
  • 1 μL Reverse Primer
  • 1 μL Taq Polimerase
  • 5 μL Buffer 10X
  • 39.5 μL H2O miliQ

Primers used as a control: HSR1 + 480 and RTRv + 1149.

Primers used to amplify FAO1 gene: iGEMJUL07_FAO1_1F and iGEMJUL08_FAO1_1R.

Thermocycler conditions, 35 cycles:

StepTemperature (°C)Time
Initialization943 min
Denaturation9430 s
Annealing4915 s
Extension721 min
Final elongation727 min

Starting from an agar plate containing a Candida genomic library, we add 1 mL of LB medium and we mix it. Then, the mix was transferred into a tube. We stored part of the culture in glycerine and another part (200 μL) was mixed with 5 mL of LB media and Amp (2:1000).

The tube containing the genomic library was grown at 28°C for 1 hour. Then, we made minipreps.

The electrophoresis gel shows that the colony PCR failed, even the control did not work. Additionally, we test the BbsI restriction enzyme and we found that it does not cut well.


08/15/2014

We transformed the whole pathway (P35S:AtrΔ11:T35S, P35S:HarFAR:T35S, P35S:EaDAcT:T35S in 2α1) into Agrobacterium tumefaciens (C58) and we cultured it in solid media with Kan (1:1000) and Rif (1:1000) during 2 days at 28°C.


08/18/2014

We repeated the colony PCR to obtain FAO1 gene and also control PCRs (using the genomic library minipreps made on 08/14/2014).

PCR conditions:

  • Colony PCR 1 (control):
    • 1 colony (C. tropicalis)
    • 1 μL dNTPs
    • 1 μL HSR1 BamHI + 480
    • 1 μL HSR1 RTRv + 1149
    • 1 μL Tap pol.
    • 5 μL Buffer 10x
    • 39 μL H2O miliQ
  • Colony PCR 2:
    • 1 colony (C. tropicalis)
    • 1 μL dNTPs
    • 1 μL iGEMJul09
    • 1 μL iGEMJul10
    • 1 μL Tap pol.
    • 5 μL Buffer 10x
    • 39 μL H2O miliQ
  • genomic library PCR 3 (control):
    • 1 μL C. tropicallis genomic library miniprep
    • 1 μL dNTPs
    • 1 μL HSR1 BamHI + 480
    • 1 μL HSR1 RTRv + 1149
    • 1 μL Tap pol.
    • 5 μL Buffer 10x
    • 39 μL H2O miliQ
  • genomic library PCR 4:
    • 1 μL C. tropicallis genomic library miniprep
    • 1 μL dNTPs
    • 1 μL iGEMJul09
    • 1 μL iGEMJul10
    • 1 μL Tap pol.
    • 5 μL Buffer 10x
    • 39 μL H2O miliQ

PCR conditions were the same as those used on 08/14/2014


08/20/2014

We were trying to obtain the FAO1 gene. We did a yeast colony PCR. Using an sterile tip, we picked one C. tropicalis colony and we introduced them into a vial containing 30 μL SDS 0.2 %. The vial was vortexed 15 seconds and then heated 4 minutes at 90°C. Next, it was centrifuged during 1 minute ans the supernatant was transferred to a new 1.5 μL vial. That was our PCR template.

We performed a control PCR employing control primers (HSRI Rtrv + 1149 and HSRI BamHI + 480)and the another PCR using FAO1 primers as previously done (iGEMJul09 and iGEMJul10).

PCR conditions using Phusion polimerase (35 cycles):

StepTemperature (°C)Time
Initialization983 min
Denaturation985 s
Annealing4910 s
Extension7220 s
Final elongation727 min

We did not close the PCR tube properly so we found our PCR product evaporated (named as FAO in the gel). The other PCR product (the control) was loaded and as it is shown in the gel electrophoresis, it didn't work.


08/22/2014

We did again a yeast genomic extraction (C. tropicalis), but this time we changed the protocol:

  • Pick 8 colonies of C. tropicalis growth in YPD media and resuspend them with 100 μL of solution (200 mM LiOAc and SDS 1%).
  • Incubate 15 min at 70°C.
  • Add 300 μL of ethanol 96%. Then, vortex the solution.
  • Centrifuge 3 min at 15000 xg.
  • Discard the superatant and resuspend the pellet (precipitated DNA) with 100 μL TE.
  • Centrifuge 1 min at 15000 xg.
  • Recover 1 μL of supernatant.

Using this genomic DNA as a template, we run a PCR (using Taq polimerase) with our primers and another one as a control.

  • Control PCR:
    • 1 μL template
    • 1 μL dNTPs
    • 1 μL HSR1 clone Fw+1
    • 1 μL HSR1 Rtrv + 1149
    • μL Taq polimerase
    • 5 μL Buffer 10X
    • 40 μL H2O
  • FAO1 PCR
  • 1 μL template
    • 1 μL dNTPs
    • 1 μL iGEMJul09_FAO1_PCR2F
    • 1 μL iGEMJul10_FAO1_PCR2R
    • μL Taq polimerase
    • 5 μL Buffer 10X
    • 40 μL H2O

PCR parameters (35 cycles):

StepTemperature (°C)Time
Initialization943 min
Denaturation9430 s
Annealing4915 s
Extension7290 s
Final elongation727 min

08/25/2014

We repeated the FAO1 colony PCR using a C. tropicalis genomic library in E. coli. We made 3 PCRs employing HSR1 primers and other 3 PCRs using our iGEM primers as follows:

  • PCR 1 (Annealing temperature 49°C)
    • HSR1 Fw_BamHI+480
    • HSR1 RTRv+1149
  • PCR 2 and 3 (Annealing temperature 54°C)
    • HSR1 clone Fw+1
    • HSR1 RTRv+1149
  • PCR 4 and 5 (Annealing temperature 50°C)
    • iGEMJul07
    • iGEMJul08
  • PCR 6 (Annealing temperature 56°C)
    • iGEMJul09
    • iGEMJul10

PCR conditions with Taq polimerase (35 cycles):

StepTemperature (°C)Time
Initialization943 min
Denaturation9430 s
Annealing491:30 min
Extension721:30 min
Final elongation727 min

The electrophoresis gel shows that PCRs have not yielded any product.

We grown pieces from the GB collection in liquid medium:

  • GB0490 2Ω2R
  • GB0160 P35S:Renilla:TNos_P35S:P19:TNos
  • GB0486 2α2R

08/27/2014

We picked colonies of GB parts and we recultured them in liquid media.

We cultured C. tropicalis in liquid media in order to make a genomic extraction to finally obtain FAO1 gene and we made YPD media.


08/28/2014

We made minipreps of yesterday's liquid culture:

  • GB parts:
    • GB0490 2Ω2R
    • GB0160 P35S:Renilla:TNos_P35S:P19:TNos
    • GB0486 2α2R

Digestions in silico to check the minipreps:

PieceRestriction enzymeExpected bands
GB0490 NotI4453, 1532, 1290
GB0160HindIII4090, 2579, 788
EcoRV4601, 2475, 381
GB0486NotI4124, 1532, 1290

GB parts were correct except GB0160, which has to be repeated since we digest low DNA concentration.

We repeated again a genomic extraction (C. tropicalis) following the same protocols.

We picked colonies and recultured them in liquid media in order to preservate them with glycerol.

  • P35S:AtrΔ11:T35S in 2α1
  • SF_P35S:EaDAcT:T35S in 2Ω2
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S in 2Ω1
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S in 2α1

08/29/2014

We repeated GB0160 digestions and we found that the piece is correct.

We observed agroinfiltered leaves and we took samples of them.


08/30/2014

We stored liquid media cultured on 08/28/2014 in glycerol.


09/01/2014

We picked colonies in order to store them in glycerol:

  • SF_P35S:EaDAcT:T35S in 2Ω2

09/02/2014

We stored in glycerol at -80°C cultures grown yesterday.

  • Add 300 μL glycerol (50%) and 700 μL of liquid culture.
  • Mix it well.
  • Store at -80°C.

09/04/2014

We did minipreps again to check our strikes, since we suspect that we have contamination in SF_P35S:EaDAcT:T35(2Ω2) agar plates and we want to store it in glycerol correctly.

Digestions in silico:

PieceRestriction enzymeExpected bands
SF_P35S:EaDAcT:T35EcoRV6652, 1044, 817 683
NotI8806, 390

We did not obtain the expected bands, we will try again picking another colony.


09/05/2014

We did minipreps and the expected digestion's result was:

PieceRestriction enzymeExpected bands
P35:EaDacT:T35SEcoRV6600, 1000, 800, 700
NcoI8800, 400

They were not correct. We will keep trying.


09/08/2014

We picked A. tumefaciens colonies containing the following TU:

  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S in 2α1
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S in 2Ω1
  • P35S:EaDAcT:T35S in 2α2
  • P35S:P19:GFP:TNos

Cultures were grown at 28°C during 2 days.


09/10/2014

To store our construction SF_P35S:EaDAcT:T35S in 2Ω2 in glycerol, we picked some colonies and cultured them in liquid media. We repeated the miniprep again to be sure that we are storing it correctly.


09/11/2014

We picked colonies once again to store the cultures in glycerol, since we did a mistake and minipreps were thrown away.


09/12/2014

We made minipreps of yesterday's culture:

  • SF_P35S:EaDAcT:T35S (2Ω2)

Note: Go to 09/16/2014

Additionally, we agroinfiltrated the following constructions:

  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S coinfiltrated with P35S:EaDAcT:T35S and P35S:P19:GFP:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S coinfiltrated with P35S:P19:GFP:TNos
  • P35S:P19:GFP:TNos (in this case without vaccum pump, it was agroinfiltrated with syringe)

The protocol followed was the same as usually, but this time using a vacuum pump and a desiccator instead of a syringe.


09/13/2014

We recultured A. tumefacies with P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S in new liquid media.


09/15/2014

We stored in glycerol:

  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S in 2α1

09/16/2014

Additional digestions that were still pending from 09/12:

PieceRestriction enzymeExpected bands
SF_P35SEaDAcTEcoRV6600, 1000, 800, 700
NcoI8800, 400

09/18/2014

Following the protocol we agroinfiltrated the following mixtures:

  • P35S:P19:GFP:TNos (control)
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S with P35S:P19:GFP:TNos

We collected agroinfiltered N. benthamiana leaf samples.

  • P35S:P19:GFP:TNos (as a control)
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S (all enzymes in one construct)
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S and P35S:EaDAcT:T35S (coinfiltrated enzyme constucts)

They did not present necrosis as the previous time, but chlorosis was seen in both agorinfiltered plants.


09/23/2014

We collected agroinfiltered N. benthamiana leaf samples.

  • P35S:P19:GFP:TNos (control)
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S with P35S:P19:GFP:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S with P35S:P19:GFP:TNos

Samples were freezed with liquid nitrogen and grinded. Then, there were stored at -80°C. Some of the samples were analyzed by CEQA.

We picked A. tumefaciens colonies containing the TU to agroinfilter.


09/24/2014

We refreshed A. tumefaciens cultures to agroinfilter N. benthamiana leaves.


09/25/2014

Collected samples of previos experiments were injected to GC-MS, following the same procedure as usually:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S with P35S:EaDAcT:T35S

09/26/2014

We analysed new samples of agroinfiltrated leaves in GC-MS (samples were prepared following the same protocol as previously):

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

We obtained similar results.

Following the same protocol as usually, we agroinfiltred the following cultures:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S with P35S:P19:TNos

Additionally, we recultured the same cultures and grown them at 28°C.

We performed an EAG. Antennae responded to the pheromone.


09/29/2014

We recultured in new media:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

We agroinfiltred N. benthamiana plants following the protocol:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S coinfiltred with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S coinfiltred with P35S:P19:TNos

09/30/2014

We test the extracts with moths, but unfortunatelly the insects were not active, so they did not react to any stimulus.

We analysed our plants using the method called Volatile Organic Compounds (VOCs).


10/02/2014

Following the agroinfiltration protocol we agroinfiltrated:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S coinfiltred with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S coinfiltred with P35S:P19:TNos

We coleected agroinfiltred samples from the previou days following the protocol.


10/06/2014

We collected agroinfiltred leaf samples.


10/10/2014

We repeated the EAG with other Sesamia individuals. We saw a peak corresponding to the alcohol pheromone (Z11-16:OH) and the acetate pheromone (Z11-16:OAc).



Expression in trichomes


07/03/2014

Genomic DNA extraction from Nicotiana tabacum. We need the genome of this organism because we want to obtain the trichome promoter from the NtCPS2 gene.

  • Obtain 100 mg of the tobacco leaves (5 disks made with a 1.5 mL vial). Made it twice.
  • Introduce the disks inside the tube.
  • Introduce the two tubes in liquid nitrogen.
  • Remove them from the liquid nitrogen and store at -80°C until use.
  • Remove one tube from -80°C and re-introduce them in liquid nitrogen.
  • Grind the disks.
  • Add 600 μL of CTAB (2%) buffer (pre-heat at 65°C.)
  • Grind the mixture.
  • Add RNAse (1.6 μL at M = 100 ug/μL for each mL of CTAB buffer).
  • Vortex it and maintain at 65°C for 45 min. Mix it by inversion 5-15 min.
  • Add 600 μL cloroform:isoamilic alcohol. Vortex it.
  • Centrifuge 15 min at 13000 rpm (or 10 min at 14500 rpm.
  • Recover the supernatant by aspiration (with a 200 μL pipet).
  • Repeat the last three steps.
  • Add one volume o isopropanol and mix well by inversion (10 times).
  • To precipitate, maintain 20 min on ice or at -80°C during 5 min.
  • Centrifuge 10 min at 13000 rpm (4°C).
  • Discard the supernatant by decantation (be carefull with the pellet).
  • Wash with 600 μL ethanol (80%).
  • Centrifuge 5 min at 13000 rpm.
  • Discard the ethanol by pipeting and let it dry a few minutes.
  • Resuspend it in 50-100 μL H2O miliQ or with TE buffer.
  • Store at -20°C.

Measurement of genomic concentration with nanodrop.

  • Tabacco 1: 182 ng/μL (Thrown away)
  • Tabacco 2: 620 ng/μL (Stored at -20°C)

Electrophoresis performed to check the genomic size of tobacco (to see if it is degradated).

It is correct.


07/10/2014

PCR of genomic extraction of tobacco in order to amplify the trichome promoter CPS2.

Ordered primers

  • IGEMJULO1
  • IGEMJULO2

Ajust primers to a 100 uM concentration:

  • IGEMJUL01 + 566 μL miliQ H2O
  • IGEMJUL02 + 691 μL miliQ H2O

Use a 1:10 alicuot for PCR (10 uM).

Reagents needed for PCR:

  • 0.5 μL template
  • 10 μL buffer HF 5x
  • 2 μL dNTPs
  • 2.5 μL oligo R
  • 2.5 μL oligo F
  • 0.5 μL Pfu
  • 32 μL miliQ H2O

Final volume: 50 μL

Parameters:

  • 98 °C (2 min)
  • 35 cycles
    • 98 °C (10 sec)
    • 59 °C (15 sec)
    • 72 °C (45 sec)
  • 72 °C (7 min)

We didn't get PCR product.


07/11/2014

Repeat PCR with different parameters.

1 2 3 4 5
Template0.5 μL0.5 μL0.5 μL0.5 μL0.5 μL
Buffer (5x)0.5 μL0.5 μL0.5 μL0.5 μL0.5 μL
dNTPs2 μL2 μL2 μL2 μL2 μL
Oligo R2.5 μL2.5 μL2.5 μL2.5 μL2.5 μL
Oligo F2.5 μL2.5 μL2.5 μL2.5 μL2.5 μL
Phu0.5 μL0.5 μL0.5 μL0.5 μL0.5 μL
Buffer32 μL32 μL32 μL32 μL32 μL

1, 2 and 5 contain buffer F; 3 and 4 contain buffer GC.

PCR parameters

  • 98 °C (2 min)
  • 35 cycles
    • 98 °C (10 sec)
    • 1, 3, 5 -> 59 °C (15 sec). 2, 4 -> 55 °C (15 sec)
    • 72 °C (45 sec)
  • 72 °C (7 min)

No PCR products again.

Repeat PCR again with other parameters.

Buffer HF Buffer GC
Template2 μL2 μL
Buffer (5x)40 μL40 μL
dNTPs8 μL8 μL
Oligo R10 μL10 μL
Oligo F10 μL10 μL
Phu22 μL μL
Buffer128 μL128 μL

Set 4 tubes with each buffer at different temperatures: 49, 52, 55, 60.

  • 98 °C (2 min)
  • 35 cycles
    • 98 °C (10 sec)
    • 49, 52, 55, 60 °C (15 sec)
    • 72 °C (45 sec)
  • 72 °C (7 min)

No PCR products again.


07/14/2014

Repeat PCR again with more genomic.

Buffer HF Buffer GC
Template5 μL5 μL
Buffer (5x)50 μL50 μL
dNTPs10 μL10 μL
Oligo R12.5 μL12.5 μL
Oligo F12.5 μL12.5 μL
Phu2.5 μL2.5 μL
Buffer107.5 μL107.5 μL

Same parameters as before except annealing temperatures which are: 50, 53, 57, 59 °C.

We still without having any amplification.


07/18/2014

Repeat the PCR with other enzyme.

  • 12.5 μL Q5 Master mix (2x).
  • 1.25 μL forward primer 10 uM
  • 1.25 μL reverse primer 10 uM
  • 0.5 μL template 620 ng/μL
  • 9.5 μL H2O

Set 4 reactions at 50, 53, 55, 59 °C.

  • 98 °C (30 sec)
  • 35 cycles
    • 98 °C (10 sec)
    • 50, 53, 55, 59 °C (15 sec)
    • 72 °C (45 sec)
  • 72 °C (2 min)

The DNA fragment of interest is around 1.5 kb so we see we finally obtained amplification at 55 and 59 °C reactions.


07/19/2014

Trichome promoter PCR product ligation in pUPD.

  • 1 μL pUPD
  • 1 μL PCR product
  • 1 μL BsmBI (5-10 ud)
  • 1 μL T4 ligase (5-10 ud)
  • 1.2 μL buffer ligase (3 ud)
  • 6.8 μL H20

Set the reaction: 25 cycles x (37°C 2 min, 16°C 5 min).


07/20/2014

Transform and grow in Petri dishes yesterday's ligation of the trichome promoter in pUPD.


07/21/2014

We picked colonies of the trichome promoter in pUPD and grown it in liquid culture.


07/22/2014

We made minipreps of yesterday's liquid culture. Additionally, we have recultured them in solid growth media.

Miniprep quantification:

PieceTubeConcentration (ng/μL)Volume (μL)
Trichome promoter in pUPD1317.126
Trichome promoter in pUPD3354.832

Both minipreps were adjusted to 75 ng/μL.

Digestions in silico performed to check the insertion:

PieceRestriction enzymeExpected bands
Trichome Promoter in pUPDNotI2981, 1523
EcoRV3942, 562

Note: To see further details of digestion master mixes, go to the biosynthesis part, date 07/22/2014.

Pieces taken from the GoldenBraid 2.0 collection were cultured in solid growth media:

  • pTnos (GB0037)
  • pGFP (GB0059)
  • pLuciferase (GB0096)

07/23/2014

Yesterday's digestions were correct, so the trichome promoter in pUPD was send to sequencing.

We picked colonies from pTnos, pGFP and pLuciferase.


07/24/2014

Results of sequencing the promoter were obtained:

MutationPosition
T insertion??
T insertion??

Minipreps of pTnos, pGFP and pLuciferase.


07/28/2014

PieceConcentration (ng/μL)Initial Volume (μL)Final Volume (μL)
GFP318.835148.8
Tnos400.835186.5
pLuciferaseNotI2981, 1731

See master mix and gel digestion in Biosynthesis part. Pieces were obtained correctly and adjusted to 75 ng/μL.

The following table shows ligation details of the trichome promoter:

ReagentVolume
CPS21 μL
GFP1 μL
TNos1 μL
BsaI1 μL
p2α21 μL
T4 ligase1 μL
Ligase buffer1 μL
H2O3 μL
Total Volume10 μL

07/29/2014

Trichome Promoter transformation in E. coli.

Using an electrocompetent E. coli strain (DH5α) and 1.5 ul ligation (CPS2:GFP:TNos in 2α2), the mix is electroporated at 1500 V. Then, 300 μL of SOC are added and stored at 37 °C with agitation.


07/30/2014

Pick colonies of CPS2:GFP:TNos in 2α2.


07/31/2014

Minipreps of yesterday's culture were made, obtaining the transcripional unit: PCPS2:GFP:TNos in 2 α2

Additionally, we recultured in petri dish with its respective antibiotic (Kan).

Digestions in silico made for checking minipreps:

Pieces/TURestriction enzymeExpected bands
CPS2:GFP:TNos in 2α2HindIII6322, 2694
EcoRV8454, 562

Digestion mixes:

  • Master mix for EcoRV:
    • 3 μL EcoRV
    • 15 μL Red buffer
    • 126 μL H20
  • Master mix for HindIII:
    • 2 μL HindIII
    • 10 μL Red buffer
    • 84 μL H2O

Note: We made master mixes because digestions were made simultaneously with the biosynthesis part.

An agarose gel was made to check the transcriptional unit:

Minipreps of CPS2:GFP:TNos in 2α2 (1) went correctly.

Miniprep results were quantified and then adjusted at 75 ng/μL:

Pieces/TUTubeConcentration (ug/μL)Initial volume (μL)Final Volume (μL)
PCPS2:GFP:TNos in 2α21128.53356.5
PCPS2:GFP:TNos in 2α22135.93461.6
PCPS2:GFP:TNos in 2α23126.23558.9

08/05/2014

Transcriptional Unit (TU) PCPS2:GFP:TNos in 2α2 was transformed in Agrobacterium tumefaciens (C58) and cultured in liquid media with Kan and Rif at 1:1000 (2 days at 28°C).

Note: The scientific name has been updated to Rhizobium radiobacter.


08/08/2014

The TU (PCPS2:GFP:TNos) was recultured in liquid media. Additionally, P35S:GFP:p19:TNos TU was recultured in liquid media, using Spm and Rif as antibiotics.


08/11/2014

Agrobacterium cultures were refreshed in new liquid media. Additionally, we cultured them in solid media.

Minipreps of the TU PCPS2:GFP:TNos in Agrobacterium were made. and digestions were performed to check they were correct.

Digestions in silico performed to check the insertion:

Restriction enzymeExpected bands
HindIII6322, 2694
EcoRV8454, 562

PCPS2:GFP:TNos (1) digestion was correct.


08/12/2014

A part containing P35S:P19:TNos construction was taken from the GoldenBraid collection (GB108) and cultured in solid media with Kanamycin 50 mg/mL. This part is not going to be used as a control but as a silencing supressor.


08/13/2014

One clony (P35S:P19:TNos) was recultured in liquid media.


08/14/2014

Minipreps and streaks of yesterday's culture were made.

The piece was checked by running a gel containing the digested fragment.

Digestions made in silico:

PieceRestriction enzymeExpected bands
P35S:P19:TNosBanI4256, 392
HindIII788, 1287, 2563

The GB108 piece (P35S:P19:TNos) is digested as expected in silico.


08/15/2014

We transformed the piece (P35S:P19:T35S) into Agrobacterium tumefaciens (C58) and we cultured it in solid media with Kan (1:1000) and Rif (1:1000) at 28°C during 2 days.


08/17/2014

Agrobacterium containing the piece has not growm well, so we transformed the piece again and we cultured it in an agar plate following the same protocol as previously. In the mean time, we made agar plates.

We made ligations of the three enzymes that form the (Z)11-16:OAc (Z11-hexadecenyl acetate) pheromone but this time each TU will contain the trichome promoter.

Note: For further information about the PCPS2 promoter, please check the trichome promoter section.

Ligation reagents:

  • PCPS2:AtrΔ11:T35S
    • 1 μL PCPS2
    • 1 μL T35S
    • 1 ul AtrΔ11
    • 1.5 μL 2α1
    • 1 μL Buffer ligase 10X
    • 1 μL T4
    • 1 μL BsaI
    • 2.5 μL H2O
  • PCPS2:HarFAR:T35S and PCPS2:EaDAcT:T35S
    • 1 μL PCPS2
    • 1 μL T35S
    • 1 ul AtrΔ11/EaDAcT
    • 1 μL 2α2
    • 1 μL Buffer ligase 10X
    • 1 μL T4
    • 1 μL BsaI
    • 3 μL H2O

08/18/2014

TU containing the trichome promoter were transformed into E. coli.

  • PCPS2:AtrΔ11:T35S
  • PCPS2:HarFAR:T35S
  • PCPS2:EaDAcT:T35S

08/19/2014

Agrobacterium has not grown in agarose plates, so we made a transformation again.

E. coli colonies containing the TUs were recultured in liquid media:

  • PCPS2:AtrΔ11:T35S in 2α1
  • PCPS2:HarFAR:T35S in 2α2
  • PCPS2:EaDAcT:T35S in 2α2

08/20/2014

We made minipreps of yesterday's culture and to check them we made digestions in silico:

PieceEnzymeExpected bands
PCPS2:AtrΔ11:T35SEcoRV562, 8448
EcoRI2687, 6323
PCPS2:HarFAR:T35SHindIII933, 2140, 6322
EcoRV562, 8833
PCPS2:EaDAcT:T35SHindIII2800, 6322
EcoRV7363, 1197, 562

Digestions were correct, but the PCPS2:HarFAR:T35S digestion 1 with HindIII resulted in more bands than expected, so we discarded that miniprep product and we used the other one.

We adjusted checked products to 75 ng/μL in order to use them in ligations.

We ligated the TUs containing the trichome promoter in Ω vectors as follows:

  • Ligation 1 (Vt = 10 μL):
    • 1 μL PCPS2:AtrΔ11:T35S
    • 1 μL PCPS2:HarFAR:T35S
    • 1 μL 2Ω1
    • 1 μL BsmBI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 4 μL H2O miliQ
  • Ligation 2 (Vt = 10 μL):
    • 1 μL SF (Stuffer fragment)
    • 1 μL PCPS2:EaDAcT:T35S
    • 1 μL 2Ω2
    • 1 μL BsmBI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 4 μL H2O miliQ

Reaction conditions: 25 cycles x (37°C 2 min, 16°C 5 min).

Then, we recultured E. coli in solid media.

TUs ligated previously were transformed in E. coli following the same protocol as it is usually used.

Finally, we obtained the control (Z)11-16Hexadecenl Acetate that will be used to check the peack in the GC-MS analysis.


08/21/2014

Agrobacterium cells containing P35S:P19:TNos did not grow, so we ask Marta for the glycerinated Agrobacterium culture.

The vector containing the TU was pGreen and we cultured them with Tetracycline, Rifampicin and Kanamycin.

We have confirmed our peak because the control sample has the same retention time and distribution pattern.

Additionally, we have recultured in liquid media TUs ligated yesterday.


08/22/2014

We made minipreps of yesterday's culture:

  • PCPS2:EaDAcT:T35S in 2Ω2
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1

Digestions in silico made to check minipreps:

PieceEnzymeExpected bands
PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35SBamHI6652, 5742
NotI9572, 1532, 1290
PCPS2:EaDAcT:T35SNotI6792, 1532, 1290
NdeI7125, 2419

All digestions were not correct.


08/24/2014

We transformed in Agrobacterium the following TUs:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1
  • PCPS2:EaDAcT:T35S in 2Ω2

We made minipreps of Agrobacterium culture: P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_P35S:EaDAcT:T35S in 2α1.

Additionally, we refreshed Agrobacterium cultures with their corresponding antibiotic:

  • T35S:P19:TNos (Rif, Kan, Tet)
  • PCPS2:GFP:TNos (Rif, Kan)
  • T35S:P19:GFP:TNos (Rif, Smp, Tet)
  • TUs: P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_P35S:EaDAcT:T35S in 2α1 (Rif, Kan)

08/25/2014

Digestions in silico made to check yesterday's minipreps:

PieceEnzymeExpected bands
P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_P35S:EaDAcT:T35SEcoRI7428, 6323
BglII2576, 11175

We repeated the Agroinfiltration protocol, but this time we infiltrated the following A. tumefaciens cultures:

  • T35S:P19:TNos
  • PCPS2:GFP:TNos + T35S:P19:TNos
  • T35S:P19:GFP:TNos
  • T35S:P19:GFP:TNos + P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_P35S:EaDAcT:T35S

We picked colonies which were transformed yesterday and we recultured them in liquid media with Spm, IPTG and X-Gal.

Finally, we have trasplanted N. benthamiana into new flowerpots to have plants ready to infiltrate in the future.


08/26/2014

We made minipreps of yesterday's culture, but only for the TU PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1 since the other tubes were blue colored.

Digestions in silico the check the minipreps:

PieceEnzymeExpected bands
PCPS2:AtrΔ11:T35S_PCPSS:HarFAR:T35SBamHI6652, 5742
BglII8131, 2669, 1594

Digestions were not correct, that is why we repeated TU ligations:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S 2Ω1
  • PCPS2:EaDAcT:T35S 2Ω2

We transformed into E. coli the previous ligations.


08/27/2014

We picked colonies of yesterday's agar plates containing the transformants and we recutured them in liquid media with Spm (1:1000).


08/28/2014

We made minipreps of yesterday's liquid culture:

  • TUs with trichome promoter:
    • PCPS2:EaDAcT:T35S (2Ω2)
    • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S (2Ω1)

Digestions in silico to check the minipreps:

PieceRestriction enzymeExpected bands
PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35SBamHI6652, 5742
BglII8131, 2669, 1594
PCPS2:EaDAcT:T35SEcoRV6652, 1197, 817, 562, 386
BglII8241, 1373

PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S was correct and PCPS2:EaDAcT:T35S tubes 1 and 3 were also correct.

We picked PCPS2 in pUPD colonies and recultured them in liquid media in order to preservate them with glycerol.


08/29/2014

We made a ligation as follows:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1 (Total Volume = 10 μL)
  • 1 μL PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1
  • 1 μL SF_PCPS2:EaDAcT:T35S in 2Ω2
  • 1.5 μL 2α1
  • 1 μL BsaI
  • 1 μL T4 ligase
  • 1 μL Buffer ligase
  • 3.5 μL H2O

Protocol followed was the same as previously done.

We transformed into E. coli the previous ligation and we recultured cells in an agar plate.

Additionally, we transformed into Agrobacterium:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1
  • SF_PCPS2:EaDAcT:T35S in 2Ω2

On the other hand, we observed the leaves agroinfiltred this week and we took pictures showing that the trichome promoter works.

We obtained trichome selective expression of GFP!


08/30/2014

We picked colonies:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S:SF_P35S:EaDAcT:T35S in 2α1

We stored PCPS2 in pUPD liquid media with glycerol.


09/01/2014

We made minipreps of PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S:SF_P35S:EaDAcT:T35S liquid media.

Digestions made in silico:

PieceRestriction enzymeExpected bands
PCPS2 AtrΔ11 + HarFAR + EaDAcTXhoI9121, 3215, 2669
EcoRI8682, 6323

Digestions were not correct, we have to repeat the ligation. We repeated it following the same protocol.

We collected agroinfiltrated samples and we prepared them to the analysis following the same protocol as we did the last time.

We picked Agrobacterium colonies:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1
  • SF_PCPS2:EaDAcT:T35S in 2Ω2
  • P35S:P19:GFP:TNos

Additionally, we picked colonies and recultured them in liquid media in order to store them in glicerol.

  • PCPS2:AtrΔ11:T35S in 2α1
  • PCPS2:HarFAR:T35S in 2α2
  • PCPS2:EaDAcT:T35S in 2α2
  • PCPS2:GFP:Tnos in 2α2

09/02/2014

We stored in glycerol at -80°C cultures grown yesterday:

  • Add 300 μL glycerol (50%) and 700 μL of liquid culture.
  • Mix it well using vortex.
  • Store at -80°C.

We transformed into E. coli ligation made yesterday and we cultured cells in agar plates.


09/03/2014

Ligation was repeated since we did not found any white colony in the agar plates. Ligation Conditions were the same as we did previously. We transformed it in E. coli and we recultured the cells in agar plates. We followed the same protocol again.

We made minipreps of yesterday's Agrobacterium colonies:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2Ω1
  • SF_PCPS2:EaDAcT:T35S in 2Ω2
  • TNos:P19:GFP:TNos

Digestions in silico to check the minipreps:

PieceRestriction enzymeExpected bands
PCPS2 AtrΔ11 + HarFARBamHI6652, 5742
NotI9572, 1532, 1290
PCPS2 EaDAcTNotI6792, 1532, 1290
NdeI7125, 2419

All digestions were correct except digestions from one miniprep (SF_PCPS2:EaDAcT:T35S). We had two replicates and only one of them was incorrect, so we could refresh the cultures with liquid media in order to follow the agroinfiltration protocol.


09/04/2014

Following the previously explained agroinfiltration protocol, we agroinfiltrated N. benthamiana with:

  • Agrobacterium control culture P35s:GFP:P19:Tnos
  • TU AtrΔ11 + TU HarFAR and P35s:GFP:P19:Tnos
  • TU AtrΔ11 + TU HarFAR and TU EaDAcT and P35s:GFP:P19:Tnos

We picked colonies of colonies transformated yesterday with TU AtrΔ11 + TU HarFar + TU EaDAcT.

We picked colonies to store them in glycerol:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S in 2mega1
  • SF_PCPS2:EaDAcT:T35S in 2Ω2

Result analysis:

Samples were checked by GC-MS and we found low pheromone signal. I may be due to agroinfiltered leaves showed necrosis. We have to repeat the experiment to confirm that our construction is not well tolerated by plants.

Additionally, we found that the alcohol precursor did not appear in the chromatogram. Nevertheless, the acetate product was present in higher quantities than the previous time, suggesting that higher yields can be obtained when the three gens are placed in the same construction.


09/05/2014

Colonies picked yesterday were not correct since resulting cultures were blue. We repeated the ligation, but this time we added 1 μL of BsaI enzyme after the inactivation step. It was incubated at 37°C during 1 hour. Then we transformed the ligation and cultured it in agar plates.

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1

09/06/2014

We picked colonies of yesterday's agar plates in order to do minipreps.


09/08/2014

We did minipreps of cultures containing the TU (PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1)

Digestions in silico:

PieceRestriction enzymeExpected bands
TU AtrΔ11 + HarFAR + EaDacTXhoI9121, 3215, 2069
EcoRI8682, 6323

Both digestions were correct.

We trasformed the previous plasmid to A. tumefaciens following the same protocol as usually.


10/09/2014

Agroinfiltered samples were collected following the usual procedure:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S coinfiltered with P35S:P19:GFP:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S coinfiltered with P35S:P19:GFP:TNos and PCPS2:EaDAcT
  • P35S:P19:GFP:TNos

They were grinded up with liquid nitrogen and then stored at -80°C.

To store our constructions in glycerol, we picked some colonies and cultured them in liquid media:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1

We are going to do the miniprep again to be sure that we are storing it correctly.

We picked colonies of A. tumefaciens containing the pheromone pathway with trichome promoter (PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_P35S:EaDAcT:T35S).


09/11/2014

We have recultured A. tumefaciens containing:

  • P35S:P19:GFP:TNos

We picked colonies once again to store the cultures in glycerol, since we did a mistake and minipreps were thrown away:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1

09/12/2014

We prepared samples to inject them in GC-MS following the same protocol as previously carried out, that is to say, grinding samples with liquid nitrogen, adding saturated CaCl2 and EDTA and sonicating.

We have digested A. tumefaciens minipreps (PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_P35S:EaDAcT:T35S in 2α1)

We made minipreps of yesterday's E. coli culture:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S (2α1)

Digetions were correct.


09/15/2014

We recultured in liquid media A. tumefaciens with PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S.


09/16/2014

Digestions that were still pending from 09/12.

PieceRestriction enzymeExpected bands
PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35SXhoI9122, 3215, 2669
EcoRI8682, 6323

Digestions were not correct, so we picked again to repeat minipreps.


09/17/2014

Minipreps of yesterday's culture were made:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

Digestions in silico were the same as previouly done.

We did not obtined the expected bands in case of the pathway regulated by the PCPS2 promoter.

We repeated again the ligation in 2α1 employing the same conditions. Then, we inactivated the enzyme by incubation at 80°C uring 30 min. After that, we added BsaI in order to prevent the growth of blue colonies in the agar plates.

In parallel, we used the miniprep to transform the construction into E. coli.

We recultured A. tumefaciens cutures to agroinfiltrate.


09/18/2014

Following the protocol we agroinfiltrated the following mixtures:

  • P35S:P19:GFP:TNos (control)
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S with PCPS2:P19:GFP:TNos

We picked colonies of transformants containing the pathway with the trichome promoter and they seem correct since they are white.


09/19/2014

We did minipreps of yesterday's culture (PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S in 2α1)

Digestions in silico:

PieceRestriction enzymeExpected bands
PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35SXhoI9122, 3215, 2669
EcoRI8682, 6323

Digestions were correct.

We have transformed on E. coli ligation made yesterday.


09/21/2014

We picked colonies to store them in glycerol:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S (2α1)

09/23/2014

We collected agroinfiltered N. benthamiana leaf samples.

  • P35S:P19:GFP:TNos (control)
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S with P35S:P19:GFP:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S with P35S:P19:GFP:TNos

Samples were freezed with liquid nitrogen and grinded. Then, there were stored at -80°C. Some of the samples were analyzed by CEQA.

We picked A. tumefaciens colonies containing the TU to agroinfilter.


09/25/2014

Following the same protocol as usually, we agroinfiltered N. benthamiana leaves.

Collected samples of previos experiments were analysed GC-MS, following the same procedure as usually:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

We obtained a peak corresponding to the ester compound (Z11-16:OAc.) when the P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S construct was expressed in the leaf. We also obtained a big peak of the alcohol (Z11-16:OH).


09/26/2014

We analysed new samples of agroinfiltrated leaves in GC-MS (samples were prepared following the same protocol as previously):

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

We obtained similar results.

Following the same protocol as usually, we agroinfiltred the following cultures:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S with P35S:P19:TNos

Additionally, we recultured the same cultures and grown them at 28°C.

We repeated A. digestions because we did not make streakes:

  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S
  • PCPS2:EaDAcT:T35S

Digestions were correct.


09/29/2014

We recultured in new media:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S

09/30/2014

We agroinfiltred following the protocol:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S coinfiltred with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S coinfiltred with P35S:P19:TNos

09/30/2014

We test the extracts with moths, but unfortunatelly the insects were not active, so they did not react to any stimulus.

We analysed our plants using the method called Volatile Organic Compounds (VOCs).


10/02/2014

Following the agroinfiltration protocol we agroinfiltrated:

  • P35S:P19:TNos
  • P35S:AtrΔ11:T35S_P35S:HarFAR:T35S_SF_P35S:EaDAcT:T35S coinfiltred with P35S:P19:TNos
  • PCPS2:AtrΔ11:T35S_PCPS2:HarFAR:T35S_SF_PCPS2:EaDAcT:T35S coinfiltred with P35S:P19:TNos

We coleected agroinfiltred samples from the previou days following the protocol.


10/06/2014

We collected agroinfiltred leaf samples.



Biosafety module


07/22/2014

Pieces taken from the GoldenBraid 2.0 collection were cultured in solid growth media:

  • P35S:Rosea:TNos
  • TA29:Barnase:TNos (from GoldenBraid 1.0 collection)

We were told by our advisor that Rosea produces necrosis in N. benthamiana, so we must think of an alternative.


07/23/2014

We picked colonies from P35S:Rosea:TNos and TA29:Barnase:TNos.


07/24/2014

Minipreps of P35S:Rosea:TNos and TA29:Barnase:TNos.


07/25/2014

Digestions in silico made for checking yesterday's minipreps:

PiecesRestriction enzymeExpected bands
P35S:Rosea:TnosBglII2495, 2302
NcoI4407, 390
TA29:Barnase:TnosBglII2825, 2245

07/28/2014

See master mix and gel digestion in Biosynthesis part. Pieces were obtained correctly and adjusted to 75 ng/μL.


07/31/2014

We talked with the NRP-UEA-Norwich team. We stablished a possible collaboration in developing the biosafety module together. They could send us their chromoproteins and we could send them our barnase and TA29 promoter.


08/05/2014

Order primers for TA29 and barnase:

NameSequenceT annealing
I14Ago01_TA29_F1CGCCGTCTCGCTCGGGAGTAGCGAATGCAATTAATTTAGACAT61.8°C
I14Ago02_TA29_R1CGCCGTCTCGCTCGCATTTTTAGCTAATTTCTTTAAGTAAAAACTTTG60.8°C
I14Ago03_barnase_F1CGCCGTCTCGCTCGAATGGCACAGGTTATCAACACG65.0°C
I14Ago04_barnase_R1CGCCGTCTCGCTCGAAGCTTATCTGATTTTTGTAAAGGTCTGATAATG63.4°C

08/07/2014

Primers received. PCR for barnase and TA29 performed.

  • TA29 PCR parameters
    • 98°C, 2 min
    • 35 cycles
    • 98°C, 10 s
    • 60°C, 18 s
    • 72°C, 40 s
    • 72°C, 7 min
  • Barnase PCR parameters
    • 98°C, 2 min
    • 35 cycles
    • 98°C, 10 s
    • 63°C, 18 s
    • 72°C, 40 s
    • 72°C, 7 min

We didn't obtain PCR product. There is a band for the barnase, but it should be around 330 bp.


08/08/2014

We repeat yesterday's PCR with 2 degrees less in the annealing step.

Results obtained are the same of yesterday's. We should think about charging something else.


08/11/2014

The previous PCR was repeated changing the annealing temperature to 61°C.

We still do not get PCR product.


08/12/2014

We forgot to adjust the TA29:Barnase:Tnos from GB 1.0 to 5 ng/μL. Maybe that's why PCRs don't work. We repeated again with the appropiate temperatures (60°C for TA29 and 63°C for barnase), but it still doesn't work!


08/18/2014

We transformed in E. coli the iGEM Barnase part (BBa_1716211), placed in Plate 3, 11o.

A PCR using Nicotiana tobacum genome as a template was made to obtain the Ta29 fragment. Primers used and also PCR conditions were the same as previous PCRs.


08/19/2014

E. coli colonies containing the iGEM Barnase part (BBa_I716.211) were recultured in liquid media.


08/20/2014

We made minipreps of yesterday's culture and to check them we made digestions in silico:

PieceEnzymeExpected bands
BarnaseNotI2046, 357
BamHI1558, 845

Digestions were correct, so we adjusted the product to 5 ng/μL in order to use them as a PCR template.

Adittionally, we made a ligation to obtain the TA29 piece in pUPD vector as follows:

  • 1 μL pUPD
  • 1 μL TA29
  • 1 μL BsmBI
  • 1.2 μL Buffer ligase
  • 1 μL T4 ligase
  • 6.8 μL H2O miliQ

Reaction conditions: 25 cycles x (37°C 2 min, 16°C 5 min).

We made a mistake predicting digetions in silico, so we repeated them, this time with the appropriate vector (pSB1C3).

PieceEnzymeExpected bands
BarnaseEcoRI and PstI2029, 374

This double digestion was checked with an agarose gel showing that the resulting bands were the expected ones.

Additionally, TA29 in pUPD vector was transformed in E. coli. The protocol followed was the same as previously done.


08/21/2014

We did a PCR to obtain the Barnase as a product using the primers Bar_F1 and Bar_R1 and the template obtained yesterday.

PCR conditions (35 cycles):

StepTemperature (°C)Time
Initialization981:30 min
Denaturation9810 s
Annealing6320 s
Extension7220 s
Final elongation727 min

The agarose gel shows that the PCR product was correct, but we purified the band to get a better quality product using a QUIAGEN purification kit (QIAEXII Gel Extraction Kit 150, Cat. No: 20021).

We recultured in liquid media yesterday's TA29 culture.


08/22/2014

We made minipreps of yesterday's culture.

PieceRestriction enzymeExpected bands
TA29 in pUPDEcoRI2997, 817
PvuI2818, 1096

Digestions were not correct. We picked again TA29 in pUPD colonies and recultured them in liquid media.


08/24/2014

We made minipreps of TA29 culture.


08/25/2014

In silico digestions made to check yesterday's minipreps.

PieceRestriction enzymeExpected bands
TA29 in pUPDEcoRI2997, 817
PvuI2818, 1096

Resulting bands were as expected in silico, the piece is correct.


08/26/2014

We ligated the Barnase PCR product into pUPD as follows (Total volume = 12 μL):

  • 1 μL pUPD
  • 1 μL Barnase product
  • 1.2 μL Buffer Ligase
  • 1 μL T4 ligase
  • 1 μL BsmBI
  • 6.8 μL H2O

Ligation conditions were the same as previous ligations.

Then, we transformed it into E. coli and we cultured them in agar plates with Amp.

We recultured TA29 piece in liquid media with Kan.


08/27/2014

We made minipreps of yesterday's culture.

Digestions made in silico:

PieceRestriction enzymeExpected bands
TA29 in pUPDEcoRI2997, 817
PvuI2818, 1096

We repeated these digestions because our water tube was contaminated.

Digestions were correct.

We picked some colonies of yesterday's agar plates containing cells with Barnase in pUPD.


08/28/2014

Yesterday's cultures were blue, but we made minipreps and checked them with digestions.

Digestions made in silico:

PieceRestriction enzymeExpected bands
Barnase in pUPDNotI2981, 411
AatII2993, 196

Barnase digestion number 1 was correct. We send the resulting miniprep product to sequencing.


09/01/2014

We picked E. coli colonies containing Barnase in pUPD again since we have a point mutation in the previous sequence. Mutation seems to be in the primer, but we are going to try another colony.


09/02/2014

We made minipreps of yesterday's culture.

We made digestions using the same restriction enzymes as previously used.

Digestions were not correct. We have to repeat again the protocol, so we picked more Barnase in pUPD colonies.

We made a screening PCR as a fast way to screen Barnase colonies.

Master Mix (12 reactions)

  • 12 μL dNTPs
  • 12 μL primer R
  • 12 μL primer F
  • 12 μL Taq Polymerase
  • 24 μL Buffer 10X
  • 48 μL H2O

Termocycler conditions (35 cycles):

StepTemperature (°C)Time
Initialization943:00 min
Denaturation940:30 min
Annealing630:20 min
Extension720:30 min
Final elongation727:00 min

Both positive and negative control were correct. Additionally, we have barnase in wells 1, 2, 3, 4, 5, 7, 8 and 9. Wells 6 and 10 were not correct.


09/04/2014

Barnase in pUPD. We made minipreps and digestioins to check them.

bands were not correct, so we picked another colony.


09/05/2014

We did minipreps of barnase's culture.

Digestions in silico:

PieceRestriction enzymeExpected bands
BarnaseNotI300

Digestions were not correct. We picked more colonies, tomorrow we have to do minipreps again.


09/06/2014

We did again Barnase minipreps.

All digestions were not correct except one of them.


09/16/2014

We repeated a Barnase PCR using the primers Ago03 and Ago04. Annealing temperature was 63°C. We expect a PCR product around 300bp. We used the HF buffer of phusion polymerase.

We repeated the barnase ligation in pUPD:

  • 1 μL pUPD
  • 1 μL Barnase
  • 1.2 μL Buffer ligase 10X
  • 1 ul T4 ligase
  • 1 μL BsmBI
  • 6.8 μL H2O

The gel shows that the PCR product is correct.


09/17/2014

We transformed into E. coli the following constructions:

  • Barnase in pUPD

We ligated the insert with vector pSB1A3 using primers named Sept02 y Sept03.


09/18/2014

We did a screening PCR in order to obtian the Barnase again. We used Taq polymerase and the following termocycler conditions (35 cycles):

StepTemperature (°C)Time
Initialization943:00 min
Denaturation940:30 min
Annealing630:20 min
Extension720:30 min
Final elongation727:00 min

We probably had a product in PCR number 7, 8 and 10.

We addded 1.2 μL of buffer CutSmart and 0.8 μL of BsaI enzyme in the ligation made yesterday. It was incubated for 1 h at 37°C. Then, it was transformated as usually.


09/19/2014

We did minipreps of yesterday's culture (Barnase in pUPD.)

Digestions in silico:

PieceRestriction enzymeExpected bands
BarnaseNotI2981, 411

Digestions were not correct. We have to repeat them.

Additionally, colony PCR made the previous day has also been checked, but even the positive control (checked Barnase) was not present.

We tried to digest Barnase ligation with XbaI (the enzyme cuts LacZ region) and then transform it on E. coli, but the electroporation cuvette sparked.

Finally, we have received the chromoproteins from Norwich team (safety module collaboration).

We made ligations of:

  • Chromoproteins in 2α1 (both yellow and blue)
  • Barnase PCR product in pUPD

09/20/2014

We digested Barnase ligation with XbaI.

We did minipreps of yesterday's culture:

  • MoFlippers constructions
  • Mutated Barnase in pUPD

Transformation into E.coli:

  • P35S:Yellow:T35S in 2α1
  • P35S:Blue:T35S in 2α1
  • Barnase (XbaI digested) in pUPD

09/21/2014

We picked colonies:

  • P35S:Blue:T35S in 2α1
  • P35S:Yellow:T35S in 2α1
  • Barnase digested with XbaI

09/22/2014

We did minipreps of yesterday's culture:

  • Barnase in pUPD
  • P35S:Blue:T35S in 2α1
PieceRestriction enzymeExpected bands
P35S:Blue:T35SEcoRV7891, 386
EcoRI6323, 1954
Barnase in pUPDEagI2969, 411, (12)

We repeated again chromoproteins ligation:

  • 1 μL 2α2
  • 1 μL P35S
  • 1 μL T35S
  • 1 μL Blue/Yellow
  • 1 μL T4 ligase
  • 1 μL Ligase buffer
  • 1 μL BsaI
  • 3 μL H2O

Digestions were run in two different gels

Barnase digestions were not correct.

Blue digestions were correct


09/23/2014

We transformed on E. coli ligations made yesterday:

  • P35S:Blue:T35S iin 2α2
  • P35S:Yellow:T35S iin 2α2

We spread the cells in LB plates and we incubate them overnight at 37°C.


09/24/2014

We did minipreps of yesterday's cultures containing Barnase in pUPD.

We addded mutated Barnase as a control. The other ones were not correct. We are going to use mutated barnase.

We picked colonies to store them in glycerol:

  • Moflippers containing Ta29, AtrΔ11, HarFAR and EaDAcT.
  • P35S:Blue:T35S in 2α1 (in A. tumefaciens)
  • P35S:Blue:T35S in 2α1 (in E. coli)

We ligated Barase in 2α1:

  • 1.5 μL 2α1
  • 1 μL Barnase in pUPD (Mutated)
  • 1 μL TA29
  • 1 μL T35S
  • 1 μL ligase buffer
  • 1 μL BsaI
  • 1 μL T4 Ligase
  • 2.5 μL H2O

We transformed the ligation into E. coli.

Additionally, we picked colonies to store the Barnase in glycerol.


09/25/2014

We did minipreps of yesterday's culture:

  • P35S:Blue:T35S in 2α2
  • P35S:Blue:T35S in 2α2

Digestions in silico:

PieceRestriction enzymeExpected bands
P35S:Blue:T35S (2α2)HindIII6322, 1169, 424, 363
NdeI5789, 2489
P35S:Yellow:T35S (2α2)HindIII6322, 1339, 355, 292
NdeI5819, 2489

Blue chromoprotein digestions are correct, but only one of the yellow chromoprotein miniprep was correct.


09/26/2014

We did minipreps of yesterday's culture:

  • TA29:Barnase:T35S in 2α1

Digestion in silico:

PieceRestriction enzymeExpected bands
Ta29:Barnase:T35S (2α1)EcoRI6323, 1452

Digestions were correct.


09/27/2014

We did minipreps of the following A. tumefaciens culture:

  • P35S:Blue:T35S (2α1)

Digestions in silico:

PieceRestriction enzymeExpected bands
P35S:Blue:T35S (2α1)EcoRI6323, 1954
EcoRV7891, 386

Minipreps were correct. We picked cells and recultured it in liquid media to agroinfiltrate them.

We picked colonies (E.coli):

  • P35S:Blue:T35S (2α2)
  • P35S:Yellow:T35S (2α2)

09/28/2014

We did minipreps of yesterday's culture.

PieceRestriction enzymeExpected bands
P35S:Blue:T35S (2α2HindIII6322, 1169, 424, 363
NdeI5789, 2489
P35S:Yellow:T35S (2α2HindIII6322, 1339, 355, 292
NdeI5819, 2489

They were correct.

We ligated both chromoproteins with Barnase TU (Amp resistance) into pSB1A3 vector.


09/29/2014

We did minipreps of yesterday's culture:

  • TA29:Barnase:T35S_P35S:Blue:T35S (2α2)
  • TA29:Barnase:T35S_P35S:Yellow:T35S (2α2)

Digestions in silico:

PieceRestriction enzymeExpected bands
Barnase + BlueNotI3388, 2131
Barnase + YellowNotI3418, 2131

Both digestions were correct.

We digested them with PstI and EcoRI, incubating at 37°C (40 min) and inactivating the enzymes at 80°C (20 min).

After that, we ligated the insert with pSB1C3 vector, incubaating at 16°C (40 min) and inactivating the ligase at 80°C (20 min).

We transformed it into E. coli and we grown the resultant cells in LB plates with chloramphenicol.

We send the Biosafety module to Norwich.


09/30/2014

We agroinfiltred following the protocol:

  • P35S:P19:TNos
  • P35S:Blue:T35S coinfiltred with P35S:P19:TNos

10/03/2014

We repeated digestion and ligation into pSB1C3 as previously done. This time we changed the digested vector sample and we used a different T4 ligase. In addition, ligation was incubated 25 min at room temperature instead of 40 min at 25°C.

Then, we trasformed the result and we cultured it in LB plates.


10/05/2014

We did minipreps of A. tumefaciens:

  • P35S:Blue:T35S (2α2)
  • P35S:Yellow:T35S (2α2)
PieceRestriction enzymeExpected bands
P35S:Blue:T35S (2α2HindIII6322, 1169, 424, 363
NdeI5789, 2489
P35S:Yellow:T35S (2α2HindIII6322, 1339, 355, 292
NdeI5819, 2489

They were correct.

Colonies containing Biosafety Module did not grown, so we repeated digestion and ligation. Then, we transformed it and we cultured them in chloramphenicol.


10/06/2014

Agroinfiltred plants with Blue chromoprotein did not show any colour. We leave it one day more.


10/07/2014

Agroinfiltred plants with Blue chromoprotein did not show any colour, even in the magnifier view.

We repeated again digestion and ligation of the biosafety module (Blue and yellow chromoproteins with Barnase)in pSB1C3.


10/08/2014

We transformed ligation made yesterday using a TOP10 E. coli strain.

We agroinfiltred orthologous genes of Rosea and Delila in Tomato. We want to test other approaches that could be used in place of Blue and Yellow chromoproteins.

  • P35S:Ant1:TNos_P35S:JFA13:TNos

10/09/2014

Yesterday's culture did not grow.


10/10/2014

We repeated digestion and ligation to pSB1C3 (for Blue and Yellow modules). Then, we transformed it.


10/16/2014

Plant leaves changed its usual green colour. As a result of anthocyanin accumulation, agroinfiltred leaves were purple coloured. We took photos of transient transformation of the two modules.



Measurement Interlab Study


08/20/2014

We transformed BBa_J23101, BBa_E0240 and BBa_J23115. All of the pieces share the vector pSB1C3, so we have cultured them in solid LB medium supplemented with chloramphenicol.


08/21/2014

Pick colonies and grow them in agitation at 37°C in liquid media supplemented with chloramphenicol.


08/22/2014

We made minipreps of yesterday's culture, except from BBa_E0240 culture, which has not grown.

Digestions in silico:

PartEnzymeExpected bands
BBa_J23101RsaI1567, 538
XhoI1213, 892
BBa_23115RsaI1199, 538, 368
XhoI1213, 892

All digestions were correct except BBa_23101 (1).


08/24/2014

BBa_E0240 and BBa_I20260 parts were transformed in E. coli DH5-α. BBa_E0240 is resistant to kanamycin and BBa_I20260 to chloramphenicol.


08/25/2014

Colonies did not grow so plates were left one more day at 37ºC.


08/26/2014

Pick colonies of BBa_E0240 and grow them in agitation at 37°C in liquid media supplemented with kanamycin.

Colonies of BBa_I20260 were not grown, so we performed transformation again.


08/27/2014

Pick colonies of BBa_I2026 grow them in agitation at 37°C in liquid media supplemented with kanamycin.

Minipreps and digestions of BBa_E0240.

PartEnzymeExpected bands
BBa_E0240NcoI1991, 955

Assembly protocol for BBa_J23101+BBa_E0240 and BBa_J23115+BBa_E0240:

Double digestions

  • 250 ng of plasmid in 16 μL H20
  • 2.5 μL NEBuffer
  • 0.5 μL BSA
  • 0.5 μL enzyme 1
  • 0.5 μL enzyme 2

Final volume: 20 μL

PartEnzymesSize
BBa_J23101SpeI, PstI2.1 kb
BBa_J23115SpeI, PstI2.1 kb
BBa_E0240XbaI, PstI800 bp

Incubate 30 min at 37°C and 20 min more at 80°C.

Run digestions in an agarose gel and purify band using QIAEX II Gel Extraction Kit.

BioBricks ligations

  • 2 μL part 1 (25 ng)
  • 2 μL part 2 (25 ng)
  • 1 μL T4 buffer 10X
  • 0.5 μL T4
  • 4 μL H20
Part 1Part2
BBa_J23101BBa_E0240
BBa_J23115BBa_E0240

Incubate 30 min at 16°C and 20 min more at 80°C.

Transform both ligations (BBa_J23101+BBa_E0240 and BBa_J23115+BBa_E0240) and grow in solid plates supplemented with chloramphenicol.


08/28/2014

Colonies did not grow so plates were left one more day at 37°C.

Minipreps and digestions of BBa_I2026.

DeviceEnzymeExpected bands
BBa_I20620NotI2726, 943
NcoI3296, 373

There was some kind of trouble with the gel and bands where not clear. We repeat the digestion again other day.


08/29/2014

Pick colonies of BBa_J23101+BBa_E0240 and BBa_J23115+BBa_E0240 grow them in agitation at 37°C in liquid media supplemented with chloramphenicol.


08/30/2014

Minipreps of BBa_J23101+BBa_E0240 and BBa_J23115+BBa_E0240 and digestions. Repeat digestions of BBa_I20620.

DeviceEnzymeExpected bands
BBa_J23101+BBa_E0240NotI2046, 943
NcoI1991, 998
BBa_J23115+BBa_E0240NotI2046, 943
NcoI1991, 998

None of the digestions of BBa_J23101+BBa_E0240. Digestions BBa_J23115+BBa_E0240 (1) and (4) were correct and all of the colonies of BBa_I20620 were correct.


08/31/2014

Pick 5 more colonies of BBa_J23101+BBa_E0240.


09/01/2014

Minipreps and digestions of 5 more cultures of BBa_J23101+BBa_E0240.

BBa_J23101+BBa_E0240 (4) ligation is correct.

We noticed that, for some reason, the stry of BBa_J23115+BBa_E0240 was contaminated, so we picked 6 more colonies.


09/02/2014

Minipreps of BBa_J23115+BBa_E0240 and digestions.

All digestions are correct except BBa_J23115+BBa_E0240 (1).

We found out that the stry of BBa_J23101+BBa_E0240 was contaminated as well, so due to the low efficiency of this ligation (1/9) we decided to transform again with the correct miniprep.


09/03/2014

Pick one colony of BBa_J23101+BBa_E0240.


09/04/2014

Miniprep of BBa_J23101+BBa_E0240.

The digestion was correct. We have scheduled the GFP for next Wednesday.


09/09/2014

Pick colonies for Measurement Interlab Study. Three technical samples for each device and the negative control (untransformed E.coli DH5-α) were picked. E. coli DH5-α cells were grown in 3.5 ml Luria-Bertani broth supplied with the corresponding antibiotic at 37°C with shaking at 250 rpm for 16 hours.


09/10/2014

Today we measured GFP for the Measurement Interlab Study.

Cells were centrifuged at 4500 rpm for 5 minutes and resuspended in ten folds the culture volume with a phosphate buffered saline (58 mM Na2HPO4, 17 mM NaH2PO4, 68 mM NaCl), as performed by Scholz et al., 2000. Na2HPO4 and NaH2PO4 were purchased from Panreac. NaCl was purchased from Fisher Bioreagents.

A GloMax-Multi Detection System form Promega fluorometer configured with the Blue optical kit (&Lamda;ex=490 nm, &Lamda;em=510-575 nm) was used to measure fluorescence. For measuring fluorescence 250 μl of each sample were placed in a black 96-well plate. Each sample was measured three times and an average was displayed on the screen.

A Biowave CO 8000 from Biochrom spectophotometer was used to measure absorbance at 600 nm. For measuring absorbance 700 μl were placed in a cubet and measured one by one in the spectrophotometer.

SampleFluorescence*Optical densityFluorescence / Optical density
Negative control(1)1.0850.382.854
(2)1.0360.352.959
(3)1.0760.392.759
BBa_I20260(1)4.9070.3613.632
(2)4.7540.3413.981
(3)3.4940.2613.439
BBa_J23101 + BBa_E0240(1)57.3930.43133.471
(2)61.6220.47131.110
(3)63.9990.47136.167
BBa_J23115 + BBa_E0240(1)1.3890.373.754
(2)1.3530.373.656
(3)1.3700.334.151

*Fluorescence measurements were calculated subtracting the average value of fluorescence of three samples of phosphate buffer (286.1) to the value given for each sample by the fluorometer.

SampleFluorescenceOptical densityFluorescence / Optical density
Negative control1.065±0.0260.373±0.0212.857±0.100
BBa_I202604.385±0.7750.320±0.05313.684±0.275
BBa_J23101 + BBa_E024061.004±3.3460.457±0.023133.583±2.530
Bba_J23115 + BBa_E02401.370±0.0180.357±0.0233.854±0.262


Translator to BioBricks and omega undercover vector


08/07/2014

Ale's primers labeled A11Dic32 and M11Nov12 found.

Run PCR with the following templates and primers:

TemplateForwardReverseExpected lenght
P35siGEMJul11 A11Dic321086 bp
T35sM11Nov12iGEM12Jul284 bp

P35s PCR parameters

  • 98°C, 2 min
  • 35 cycles
    • 98°C, 10 s
    • 67°C, 18 s
    • 72°C, 40 s
  • 98°C, 7 min

T35s PCR parameters

  • 98°C, 2 min
  • 35 cycles
    • 98°C, 10 s
    • 65°C, 18 s
    • 72°C, 40 s
  • 98°C, 7 min

We didn't obtain PCR product.


08/08/2014

We repeat yesterday's PCR with 2 degrees less in the annealing step.

Now there is a band for P35s but it should not be there.


08/11/2014

The previous PCR was repeated changing the annealing temperature to 61°C.

We still do not get PCR product.


08/12/2014

We repeated the PCR once more, this time setting the annealing temperatures at (59°C for T35s and 61°C for P35s).


08/18/2014

We repeated the PCR setting the annealing temperature at 67°C.


08/19/2014

We are trying another PCR strategy to obtain the PCR product.

  • PCR1: P35S template (as previously done)
  • PCR2: P35S:AtrΔ11:T35S template
PCRPrimersTm (°C)
1iGEMJul11 and A11Dic3262
2M11Nov12 and iGEMJul1265

We checked PCR products and only the T35S product was amplified correctly (the expected band was around 300 bp).


08/20/2014

As the PCR product was correct, we made a ligation to obtain the T35S piece in pUPD vector as follows:

  • 1 μL pUPD
  • 1 μL T35S_BB
  • 1.2 μL Buffer ligase
  • 1 μL BsmBI
  • 1 μL T4 ligase
  • 6.8 μL H20 miliQ

Reaction conditions: 25 cycles x (37°C 2 min, 16°C 5 min).

We repeated a PCR to obtain the P35S using the same template as previously and the following conditions (35 cycles):

StepTemperature (°C)Time
Initialization981:30 min
Denaturation9810 s
Annealing57/62/6720 s
Extension7225 s
Final elongation727 min

We checked the PCR product running a gel electrophoresis, but the PCR did not work again and the agarose gel did not show any band.

T35S in pUPD vector was transformed in E. coli and cultured in agar plates. The protocol followed was the same as it is usually done.


08/21/2014

We picked E. coli colonies and recultured them in liquid media with the apprpriate antibiotic, Amp (2:1000).


08/22/2014

We made minipreps of yesterday's culture and we made digestions to check them.

In silico digestions:

PieceRestriction enzymeExpected bands
T35S in pUPDEcoRI2997, 309
PvuI2210, 1096

Digestions were correct.

We run a PCR with the TUs as templates (adjusted to 5 ng/μL) and using Jul11 and Jul12 as primers.

  • EaDAcT (2α2)
  • HarFAR (2α2)
  • AtrΔ11 (2α1)

Conditions for 35 cycles:

StepTemperature (°C)Time
Initialization982 min
Denaturation9815 s
Annealing6520 s
Extension7245 s
Final elongation727 min

We made another PCR to obtain P35S as a product. This time, we used Q5 High Fidelity polimerase.

Conditions for 35 cycles:

StepTemperature (°C)Time
Initialization981:30 min
Denaturation9810 s
Annealing5520 s
Extension7225 s
Final elongation727 min

The gel shows that the template is not there.


08/25/2014

We repeated the PCR made the previous day using TUs as a template and primers Jul11 and Jul12, but this time we changed the extension time to 1:30 min.

The gel showed that the PCR products were correct.


09/06/2014

We did a PCR in order to obtain a TU ready to send:

PCR P35S_BB was performed using primers labelled Jul11 (forward) and Ago09(reverse). The annealing temperature was 62°C and the extension time selected was 50s. Other parameters were the same as previously used.

We did not obtain any product.


09/07/2014

We repeated yesterday's PCR, but this time we changed the annealing temperatures, trying 65°C and 72°C. Other parameters were maintained.

We did not obtain any product.


09/08/2014

We repeated the P35S_BB PCR, but this time we changed the annealing temperature to 65°C.

We did not obtain any PCR product.


09/17/2014

We digested BBa_E0040 with XbaI and PstI:

  • 250 ng E0040
  • 2.5 μL NEB2
  • 0.5 μL BSA
  • 0.5 μL XbaI
  • 0.5 μL PstI

We purified the band in order to obtain vector pSB1A3.

We transformed into E. coli the following constructions:

  • E0040 + insert (Ω undercover)
  • MoFlipper + AtrΔ11
  • MoFlipper + HarFAR
  • MoFlipper + EaDAcT
  • MoFlipper + TA29

09/19/2014

We did minipreps of yesterday's culture:

  • Omega undercover - GB conversor to BB

Digestions in silico:

PieceRestriction enzymeExpected bands
Omega undercoverDraI906, 692, 558, 19

Digestions were not correct. We have to repeat them, so we picked other colonies.

MoFlipper cultures did not grow.


09/22/2014

We did minipreps of yesterday's culture:

  • Omega undercover
PieceRestriction enzymeExpected bands
Omega undercoverDraI906, 692, 558, 19

DraI does not cut well, but Ω undercover seems to be okay. Nevertheless we repeated the digestions.


09/23/2014

We repeated digestions with PstI and EcoRI:

  • Omega undercover with TA29
  • MoFlipper with AtrΔ11
  • MoFlipper with HarFAR
  • MoFlipper with EaDAcT

09/26/2014

We digested BBa_J23115 with EcoRI and PstI to obtain pSB1C3 vector. Then, we purified the band.

We ligated Yellow and Blue TUs to the Ω undercover vector. We transformed them into E. coli and we grown the culture in LB agar plates.



Switch


07/04/2014

Adquisition of S. cerevisiae genomic DNA. (5 μL, stored in the fridge)


07/28/2014

We had the genome of S. cerevisiae, needed to extract the target genes that are going to be used to build the switch. However we finally used our genome extraction (see Biosynthesis part, date 07/23/2014 for further details).

Previously we have designed a cupple of primers to amplify the CUP1 and CUP2 genes present in the yeast.

PCR reaction reagents:

ReagentCUP1-PCR1CUP2-PCR2
Template0.5 μL0.5 μL
Buffer HF (5X)10.0 μL10.0 μL
dNTPs2.0 μL2.0 μL
Oligo R (JUL06)2.5 μL2.5 μL
Oligo F (JUL05)2.5 μL2.5 μL
Phusion polymerase0.5 μL0.5 μL
H2O32.0 μL32.0 μL

Annealing temperature: both 61 °C

PCR products were checked using an electrophoresis. Expected bands:

  • CUP1-PCR1: 386 bp
  • CUP2-PCR2: 348 bp

Both PCR products were correct.


07/30/2014

We repeated the PCR because we had to purify the bands CUP1-PCR1 and CUP2-PCR2.For this purpose we used the kit "QIAEX II Gel Extraction Kit".

Ligation of both parts of CUP2.

  • 1 μL CUP1-PCR1
  • 1 μL CUP1-PCR1
  • 1 μL pUPD
  • 1 μL BsmBI
  • 1 μL T4 ligase
  • 1 μL ligase buffer
  • 4 μL H20

07/31/2014

CUP2 was transformed in pUPD and cultured in solid media (37°C).


08/04/2014

Grow the piece corresponding to Gal4 Activation Domain (GB0095) from the GB collection in solid medium.


08/05/2014

Pick colonies from CUP2 (3 colonies) and Gal4AD (1 colony).


08/06/14

Minipreps of yesterday's culture were made:

  • Gal4AD
  • CUP2

Digestions made in silico in order to check transcriptional units:

Pieces/TUResriction enzymesBufferExpected Bands
CUP2 in pUPDNot1Orange2981, 752
CUP2 in pUPDRsaITango2457, 1276
Gal4AD in pUPDNot1Orange2981, 330
Gal4ADPuuIRed2215, 1096

CUP2 in pUPD is correct. RsaI restriction enzyme does not cut properly, as a result we obtained different bands from those ones expected.

Gal4AD piece is correct.


08/11/2014

Sequencing results of CUP2 piece were finally received and they were correct.

As the sequence was correct, we could continue with ligations.

Quantification

  • CUP2: 110.3 ng/μL
  • Gal4: 221.4 ng/μL

Samples were diluted to 75 ng/μL.

The following ligations were made:

  • P35S:CUP2:Gal4AD:T35S
    • 1 μL P35S
    • 1 μL CUP2
    • 1 μL Gal4AD
    • 1 μL T35S
    • 1 μL BsaI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 1 μL 2α2 vector
    • 2 μL H2O
  • PCPS2:CUP2:Gal4AD:T35S
    • 1 μL PCPS2
    • 1 μL CUP2
    • 1 μL Gal4AD
    • 1 μL T35S
    • 1 μL BsaI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 1 μL 2α2 vector
    • 2 μL H2O

08/12/2014

E. Coli transformation with the previous ligations and culture in solid medium (LB-agar with Kanamycin and X-Gal + IPTG) overnight.


08/13/2014

We recultured yesterday's colonies in liquid media with the same antibiotic (Kan) and X-Gal.

  • P35S:CUP2:Gal4AD:T35S in 2α2 (3 colonies)
  • PCPS2:CUP2:Gal4AD:T35S in 2α2 (3 colonies)

08/14/2014

Minipreps of yesterday's culture and streakes were made.

Digestions made in sililco to chceck the TU:

Pieces/TUResriction enzymesBufferExpected Bands
PCPS2:CUP2:Gal4AD:T35SHindIIIRed6322, 2641
EcoRVRed562, 8401
P35S:CUP2:Gal4AD:T35SHindIIIRed6322, 2223
BclIGreen476, 7137, 932

The agarose gel shows that P35S:CUP2:Gal4AD:T35S piece is not well build. Nevertheless, PCPS2:CUP2:Gal4AD:T35S piece is OK.


08/15/2014

P35S:CUP2:Gal4AD:T35S digestions made yesterday were repeated as follows:

Pieces/TUResriction enzymesBufferExpected Bands
P35S:CUP2:Gal4AD:T35SHindIIIRed6322, 2223
NotIGreen5723, 1290, 1532

After running the electrophoresis, the resulting bands show that there is something more than expected in the plasmid. Furthermore, we check that the extra part has been added in the part region. Ligation step has to be repeated.


08/17/2014

We repeated the P35S:CUP2:Gal4AD:T35S ligation.

Ligation reagents:

  • P35S:CUP2:Gal4AD:T35S:
    • 1 μL PCPS2
    • 1 μL T35S
    • 1 ul Gal4AD
    • 1 μL 2α2
    • 1 μL CUP2
    • 1 μL Buffer ligase 10X
    • 1 μL T4
    • 1 μL BsaI
    • 2 μL H2O

08/18/2014

TU piece was transformed in E. coli (P35S:CUP2:Gal4AD:T35S) and cultured in solid media.


08/19/2014

E. coli colonies containing the TU (P35S:CUP2:Gal4AD:T35S in 2α2) were recultured in liquid media.


08/20/2014

Digestions in silico to check the minipreps:

PieceEnzymeExpected bands
P35S:CUP2:Gal4AD:T35SHindIII6322, 2223
NcoI8155, 390

Digestions were correct.


08/27/2014

We made ligations as follows:

  • P35S:CUP2:Gal4AD:T35S in 2Ω1:
    • 1 μL P35S:CUP2:Gal4AD:T35S in 2α2
    • 1 μL SF in 1α1
    • 1 μL 2Ω1
    • 1 μL BsmBI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 4 μL H2O
  • PCPS2:CUP2:Gal4AD:T35S in 2α1:
    • 1 μL PCPS2
    • 1 μL CUP2
    • 1 μL Gal4AD
    • 1 μL T35S
    • 1 μL 2α1
    • 1 μL BsaI
    • 1 μL T4 ligase
    • 1 μL Buffer ligase
    • 4 μL H2O

Protocol was the same as previously folowed.


08/28/2014

We transformed into E. coli yesterday's ligations and cultured them in agar plates:

  • P35S:CUP2:Gal4AD:T35S in 2Ω1
  • PCPS2:CUP2:Gal4AD:T35S in 2α1

We picked CUP2 in pUPD colonies and recultured them in liquid media in order to preservate them with glycerol.


08/29/2014

We picked colonies:

  • PCPS2:CUP2:Gal4AD:T35S in 2α1

The other TU has not grown, that is why we repeated the transformation as yesterday was done.


08/30/2014

We picked colonies:

  • P35S:CUP2:Gal4AD:T35S in 2Ω1

We stored CUP2 in pUPD liquid media with glycerol.

We made minipreps of PCPS2:CUP2:Gal4AD:T35S in 2α1.

Digestions in silico to check the minipreps:

PieceEnzymeExpected bands
PCPS2:CUP2:Gal4AD:T35SEcoRV8401, 562
HindIII6322, 2641

We have to repeat digestions.


09/01/2014

We repeated P35S:CUP2:Gal4AD:T35S in 2Ω1 ligation since previous cultures were blue colored.


09/02/2014

We transformed into E. coli ligation made yesterday and cells were cultured in agar plates.


09/03/2014

P35S:CUP2:Gal4AD:T35S in 2Ω1 ligation was repeated, since we did not found any white colony in the agar plates. Conditions were the same as we did previously. We transformed it in E. coli and we recultured the cells in agar plates.

We repeated the following digestions:

  • PCPS2:CUP2:Gal4AD:T35S (2α1)

Digestions made in silico:

PieceRestriction enzymeExpected bands
PCPS2:CUP2:Gal4AD:T35SNotI6140, 1532, 1290
BglII8103, 859

We consider to use the miniprep number 2.


09/05/2014

We did minipreps of yesterday's culture:

  • P35S:CUP2:Gal4AD:T35S in 2Ω1

Digestions in silico:

PieceRestriction enzymeExpected bands
RenillaHindIII4000, 2500, 800
EcoRV4600, 2500, 400

09/09/2014

We digested minipreps made the previous days:

  • P35S:CUP2:Gal4AD:T35S in 2Ω1

Digestions in silico:

PieceRestriction enzymeExpected bands
P35S:CUP2:Gal4AD:T35SBamHI6652, 2385
NcoI8647, 390

Digestions were not correct, we made a mistake and we have to repeat them tomorrow. We picked colonies again.


10/09/2014

To store our construction in glycerol, we picked some colonies (containing the plasmid P35S:CUP2:Gal4AD:T35 in 2α2)and cultured them in liquid media

We did minipreps of yesterday's culture and we repeated digestions.

CUP2 digestions were correct.


09/11/2014

We obtained from GB collection the following piece:

  • GB253 (UTR from TMV to use it as the switch promoter)

We stored in glycerol:

  • P35S:CUP2:Gal4AD:T35S (2α2)

09/15/2014

We picked E. coli colonies containing:

  • GB0253 UTR Ω (Amp Resistance)

We transformed the SF_P35S:CUP2:Gal4AD:T35S in 2Ω2 into A. tumefaciens. LB agar plates were stored at 28°C during 2 days.


09/16/2014

We did minipreps and streakes of yesterday's culture:

  • GB0253

Digestions in silico to check the minipreps:

PieceRestriction enzymeExpected bands
GB0253EcoRI2997, 130
PvuI2031, 1096

We had very low DNA content in GB253 miniprep so we recultured it in new liquid media to repeat the miniprep again.


09/17/2014

Minipreps of yesterday's culture were made:

  • GB0256

Digestions in silico were the same as previouly done.

We obtained low DNA content in GB0253 miniprep, but it was correct.


09/22/2014

We finally received the GBlock containing the chimerical promoter: UAS sequence + (-60)mini35S.

We ligate it in pUPD vector:

  • 2 μL GBlock
  • 1 μL pUPD
  • 1 μL BsmBI
  • 1 μL T4 ligase
  • 1 μL Ligase buffer
  • 4 μL H2O

09/23/2014

We transformed on E. coli ligations made yesterday:

  • GBlock in pUPD

We spread the cells in LB plates and we incubate them overnight at 37°C.


09/24/2014

We picked clonies containing GBlock in pUPD in order to store them in glycerol.


09/25/2014

We did minipreps of yesterday's culture containing the GBlock in pUPD.

Digestions in silico:

PieceEnzymeExpected bands
GBlock in pUPDPvuII2564, 590

Digestions have to be repeated.

Minipreps were correct.


09/29/2014

We did a screening PCR of the gBlock (Vt=50 μL/well):

  • 1 μL colony
  • 1 μL primer F
  • 1 ul primer R
  • 1 μL dNTPs
  • 1 μL Taq Polymerase
  • 5 μL Buffer 10X
  • 40 μL H20

PCR conditions (35 cycles):

StepTemperature (°C)Time (min)
Initialization943:00
Denaturation940:20
Annealing50.40:20
Extension721:00
Final elongation727:00

We run a gel with PCR products:

  • Correct expected band size: 371 bp
  • Incorrect possible band: 270 bp

We picked colonies 3 and 12 to make the miniprep.


09/30/2014

We did minipreps of yesterday's culture.

Digestions in silico:

PieceEnzymeExpected bands
GBlock in pUPDPvuII2564, 590
EcoRI2997, 157

They were correct.


10/01/2014

We ligated the GBlock into 2α1 vector:

  • 0.75 μL mini35S (75 ng/μL)
  • 3.75 μL UTR Ω (15 ng/μL)
  • 0.75 ul Luciferase (75 ng/μL
  • 0.75 T35S (75 ng/μL)
  • 1 μL 2α1 (58 ng/μL)
  • 1 μL Bsa1
  • 1 μL T4 Ligase
  • 1 μL Buffer ligase

Tomorrow we will transform the result.


10/02/2014

We transformed yesterday's ligation in 2α1 into E. coli DH5α cells and the result was cultured in LB Kan-IPTG-XGal plates.

Addtionally, we ligated the binary assembly: CUP2 with Renilla into the 2α2 vector.

  • P35S:CUP2:T35S_P35S:Renilla:TNos_P35S:P19:TNos:
  • 1 µl pEGB2?1 35s:CUP2:T35s
  • 2 µl pEGB1?2 35s:Ren:Tnos-35s:p19:Tnos
  • 1 µl pDGB2?2
  • 1 µl BsaI
  • 1 µl T4 ligasa
  • 1.2 µl T10x
  • 4.8 µl water

10/03/2014

We picked two colonies of each construct:

  • CBSmini35s:UTRΩ:Luciferase:T35s in 2α1
  • P35s:CUP2:T35s_P35s:Renilla:TNos_P35s:P19:Tnos in 2α2

10/04/2014

We made minipreps of yesterday's culture:

  • CBSmini35s:UTRΩ:Luciferase:T35s in 2α1
  • P35s:CUP2:T35s_P35s:Renilla:TNos_P35s:P19:Tnos in 2α2
PieceEnzymeExpected bands
CBSmini35s:UTRΩ:Luc:T35sEcoRI6323, 2084

CBSmini35s:UTRΩ:Luc:T35s digestions were correct.

P35s:CUP2:T35s_P35s:Ren:TNos_P35s:P19:Tnos digestions were not correct. If we look at the band size, colony number 1 could be P35S:Ren_P35S:P19 without CUP2 TU.

We changed the strategy, we have the Luciferase TU and another Renilla + P19 in 2α2, so we made the following ligation.


10/06/2014

We made the following binary assembly.

  • CBSmini35s:UTR?:Luc:T35s-35s:Ren:Tnos-35s:p19:Tnos (2Ω2):
    • 1 µl CBSmini35s:UTRΩ:Luc:T35s 2α1
    • 1 µl P35s:Ren:Tnos_P35s:P19:Tnos 1α1
    • 1 µl 2Ω2
    • 1 µl BsmBI
    • 1 µl T4 ligasa
    • 1.2 µl Buffer T10x
    • 5.8 µl H2O

We transformed on A. tumefaciens:

  • P35S:CUP2:T35S in 2Ω1

  • 10/07/2014

    We picked two colonies of:

    • CBSmini35S:UTRΩ:Luc:T35s_P35s:Ren:Tnos_P35s:P19:TNos

    10/08/2014

    We made minipreps of yesterday's culture:

    • CBSmini35S:UTRΩ:Luc:T35s_P35s:Ren:Tnos_P35s:P19:TNos

    Restriction analysis:

    PieceEnzymeExpected bands
    CBSmini35s:Luc_35s:Ren_35s:P19EcoRV6652, 3276, 2475, 812, 381
    PvuI5946, 5595, 2055

    We transformated colony 1 on A. tumefaciens.

    We picked A. tumefaciens colonies with P35S:CUP2:T35S in 2Ω1.


    10/10/2014

    We picked A. tumefaciens colonies transformated the previous day.


    11/10/2014

    We did minipreps of yesterday' culture:

    • SF_P35S:CUP2:T35S in 2Ω1

    Digestions in silico:

    PieceEnzymeExpected bands
    P35S:CUP2:T35SBamHI6652, 2385
    NcoI8647, 390

    They were correct.


    13/10/2014

    We did minipreps of yesterday's culture:

    • CBSmini35S:Luciferase_P35S:Renilla_P35S:P19:Tnos
    PieceEnzymeExpected bands
    CBSmini35S Luciferase RenillaEcoRV6652, 3276, 2475, 812, 381
    NcoI5946, 5595, 2055

    They were correct.








    Great Days!

    Here is our biggest days in the Laboratory

    Day 1.

    Day 2.

    Day 3.