Team:Freiburg/Notebook Suicide Gene

labor:cell_culture - iGEM 2017

Lab Notebook Suicide Gene

10.08.17

Transformation of pIG17_83 (Suicide Gene) with Xl 10 Gold

  1. Thaw Xl10 competent cells from -80 ° Freezer on 30 Minutes on Ice.
  2. Add Plasmid DNA [2 µl, dependent on concentration] and let stand on Ice for 30 Minutes.
  3. Heat shock on 42 ° for 45 Seconds and let stand for 2 minutes on Ice.
  4. Add LB-Medium [450 µl] without antibiotics and incubate for 37 ° for 60 minutes and 300 rounds per minute.
  5. Plate Culture with antiobiotic resistence on LB-plate with corresponding antibiotics.
  6. (If overgrown, dilute streak bacteria colonies on another plate.)

11.08.2017

Occulation of Overnight cultures

Pick four single colonies and oculate four overnight cultures with LB-AMP [6 ml each] in glas reaction tubes.

12.08.17

Plasmid Isolation of four Overnight Cultures of pIG17_83 (Suicide Gene) with Promega Miniprep Kit

  1. Elution in pre-warmed (50°) Elution Buffer [30 µl].
SampleConcentration [ng/µl]
Suicide Gene 1521
Suicide Gene 3549
Suicide Gene 3804
Suicide Gene 4600

14.08.2017

Test Digest of pIG17_83 with XbaI and KpnI

All Controls were performed with autoclaved water [18 µl] and of Plasmid-Solution [2 µl].

Top Band XbaI with Suicide Gene 1-4 with Controls in between

ComponentsVolumes [ng/µl]
Water14,5 (15,5 for SG3)
DNA2 (1 for SG3)
Cutsmart2
XbaI1,5

Expected Fragments: 4617 bp, 3495 bp & 1712 bp

Lower Band KpnI with Suicide Gene 1-4 with Controls in between

ComponentsVolumes [ng/µl]
Water14,5 (15,5 for SG3)
DNA2 (1 for SG3)
Cutsmart2
KpnI1,5

Expected Fragments: 4926 bp, 3867 bp & 1031 bp

Incubate for 60 minutes at 37 °. 4 µl 6X Orange Dye was added to each Sample. DNA-Ladder: 5 µl 1kb GeneRuler plus

Gel Preparation

  1. Heat up 85 ml (small) or 120 ml (big) 1 x TAE-Buffer with 1 mass percent Agarose in the microwave until the Agarose has dissolved completely.
  2. Add 5 µl (small) or 7 µl (big) Midori-Green DNA Stain to the heated TAE-Agarose mix and pour into respective gel-chamber with desired comb.
  3. Let it cool for >45 minutes until it has complete solidificated.
  4. Remove comb carefully to reveal the gel slots.
  5. Pour 1 x TAE-Buffer over the cooled down gel until it is completely covered in liquid.

Gel run of test digests

  1. Put 5µl (small gel) or 8 µl (big gel) DNA ladder (1kb GeneRuler plus) into slot for use as reference.
  2. Mix DNA Sample with Loading Dye for desired Dilution (6x Purple or Orange Loading Dye)
  3. Load Gel Slot with Dna Sample
  4. Run the Gel with following settings: 120 Volt, 3 Watte, 15 Ampere for 45 Minutes.
  5. Visualize in the Gelbox with Exposure Time of 64 seconds and UV-Light.

Gel-Image

15.08.2017

Test digest with Nde1 and PvuII in CF and Fast digest

First four Slots of Top Band (Cutsmart) and Lower Band (Fast Digest): NdeI with Suicide Gene 1 & 2 with Controls in between.

Last four Slots of Top Band (Cutsmart) and Lower Band (Fast Digest): PvuII with Suicide Gene 3 & 4 with Controls in between.

NdeI with SG 1 & 2 Expected fragements: 7071 bp & 2753 bp

ComponentsVolumes [µl]
Water15,25 (CS) or 14,5 (FD)
DNA2
CS (Top) or FD (Lower)2
NdeI 0,75 (CS) or (1,5 FD)

PvuII with SG 3 & 4. Expected Fragements: 7311 bp & 2513 bp

ComponentsVolumes [µl]
Water15,25 (CS) or 14,5 (FD)
DNA2
CS (Top) or FD (Lower)2
NdeI 0,75 (CS) or (1,5 FD)

Gel Run of Test Digest

Ladder: 5µl 1KB GeneRuler PLus

Samples 3 & and 4 have been confirmed as correct fragments.

A glycerolstock of Sample 3 has been made and put into the -80° Freezer

21.08.2017

Occulation of four overnight cultures with pIG17_82 (p526) lentiviral transfer plasmid

4 Colonies have been picked from an LB-Plate.

22.08.2017

Miniprep of four O/N Cultures with p526 with Promega Miniprep Kit

Elution in 30 µl prewarmed (50°) Elution Buffer

SampleConcentration
1625
2494
3607
4731

Digest of p526

ComponentConcentrationVolume (µl]
Water-18
DNA125 [ng/µl]16
Cutsmart10x4
SpeI-HF20 U/µg1
SalI-HF20 U/µg]1

Gel Run

Third slot: Digest of p526, Top fragment (Backbone)

Gelextraction of lentiviral Backbone p526 (5839 bp)

Elution in 12 µl milliq Water Yield: 15 ng/µl

21.09.17

Extension PCR with CMV of pIG17_37 and Primers oIG17_280 & and oIG17_281

Forward Extension binds into Lentiviral Backbone (pIG17_83) upstream of restriction site with SpeI.

Reverse Extention binds downstream into e-GFP Sequence of Suicide Gene (pIG17_83).

Sequence:

oIG17_280: Extension: 5`-ATTCAAAATTTTATCGATACTAGCGT-3` Binding Site: 5'- TAGTTATTAATAGTAATCAATTACGGGG - 3'

oIG17_281: Extension: 5`-GCTCCTCGCCCTTGCTCACCAT-3` Binding Site: 5'- TGATACACTTGATGTACTGCCAAG - 3'

Annealing Temperature of 60° was calculated by NEB-Tm-Calculator using Q5-Polymerase.

PCR-Components

ComponentsConcentrationsVolumes [µl]
H2O-29
Template (plG17_34)20 ng/µl5
10 mM FW primer - 2.5
10 mM RW primer-2.5
10mM dNTPs - 0,5
5x Q5 Buffer-10
Q5 Polymerase -0.5
Total-50

PCR-Cycles Expected Fragmens Size: 282 bp

StepDenaturationAnnealingExtensionFinal Elongation Chill
Temperature [°]986072724
Length30 s 20 s30s2 MinutesPause
Cycles 30 x 1Pause

Extension PCR with e-GFP-Hygromycin-Thimidinekinase Cassette

oIG17_282 binds to eGFP Sequence of Suicide Gene.

oIG237 binds to 3'End of Thimidine Kinase, Extension binds downstream of SalI - Restriction site into WPRE-enhancer element of transfer-Plasmid p526 (pIG17_82).

oIG17_282: Binding: 5' - ATGGTGAGCAAGGGCGAGGAGCTGTTC - 3'

oIG17_237: Extension: 5'- GTAATCCAGAGGTTGATTGTCGA - 3' Binding Site: 5'- TCAGTTAGCCTCCCCCATC -3'

Annealing Temperature of 67° was calculated by NEB-Tm-Calculator using Q5-Polymerase

PCR

ComponentsConcentrationsVolumes [µl]
H2O-28.5
Template (plG17_34)20 ng/µl5
10 mM FW primer - 2.5
10 mM RW primer-2.5
10mM dNTPs - 1
5x Q5 Buffer-10
Q5 Polymerase -0.5
Total-50

PCR-Cycles Expected Fragment Size: 2906 bp

StepDenaturationAnnealingExtensionFinal Elongation Chill
Temperature [°]986772724
Length30 s 20 s4 Minutes5 MinutesPause
Cycles 30 x 1Pause

22.09.2017

Gel Run with Extension PCR CMV & eGFP-Hygromycin-TK Fragments

First Slot: 1 kb GeneRuler PLus Ladder

Second Slot: CMV (282 bp)

Third slot: Suicide Gene Cassette (2906 bp)

Fragments with 282 bp (extension CMV) & 2906 bp (SG-Cassette) were cut out.

23.09.2017

Gelextraction of extension PCRs with QiaQuick Gel extraction kit

Procedure according provided protocol Elution in 10 µl prewarmed (50°) Milliq H20

Sample
ex.CMV6
ext.SG130

26.09.17

Repetion of extension PCR with CMV

CMV from the Gel-Extraction (23.09.2017) was again used as template.

PCR-Cycles Expected Fragmens Size: 282 bp

StepDenaturationAnnealingExtensionFinal Elongation Chill
Temperature [°]987072724
Length30 s 20 s30s2 MinutesPause
Cycles 40 x 1Pause

No gel run.

27.09.17

Gibson Assembly with CMV-fragment, Suicide-Gene-fragment and lentiviral Backbone p526 pIG17_82

ComponentsConcentrationAmountWeight [pmol]Volume [µl]
Water-1
p526 Backbone-0,01350ng2
CMV-0,0550,5
SG-Cassette-0,0390,5
Gibson Master Mix2x5

Final Construct: pIG17_161

Transformation of pIG17_161 with XL10 Gold

28.9.17

1 Colony pick and O/N of the colony

29.9.17

Miniprep of O/N

Elution in 30 µl prewarmed (50°) Elution Buffer

Yield: 1 µg/µl Second Eluate: 140 µg/µl

Test Digest of pIG17_161

ComponentsConcentrationVolumes [µl]
Water-13,5
DNA140 ng/µl3,5
FAstDigest5x2
NdeI-1µl

Incubate for 30 Minutes on 37 degress.

Expected fragments: 5314 bp & 3647 bp

Gel run

First Slot: 1 Kb GeneRuler PLus Ladder

Second Slot: Digest with fragments of 8961 bp (uncomplete digest) 5314 bp & 3647 bp.

Third Slot: Undigested Control

Sequencing of pIG17_161

Sample with 1 µg DNA per µl (30 µl) was divided into 6 Samples and sent in for sequencing for with Oligos oIG17_19, oIG17_246, oIG17_247, oIG17_248, oIG17_221 and an eGFP-Custom Primer offered by GATC.

30.9.2017

Sequencing results

Sequencing confirmed positive sequence, pIG17_161 was handed over to cell culture for lentiviral transduction

Retransformation of pIG17_161

01.10.2017

Colony Pick & Occulation of 4 Overnight cultures

02.10.2017

Miniprep of 4 O/N

SampleConcentration [ng/µl]
1398
2685
3787
41157

An Glyerolstock of Sample 4 has been made with the Number 161 and Notation CMC_eGFP_Hygromycin_Thimidine_Kinase-transfer.

03.10.17

Miniprep of 10 O/N Cultures pIG17_83

Elution on 37° for 15 Minutes with ddH2O

SampleConcentration [ng/µl]
1262
2294
3389
4375
5278
6305
7261
8205
9321
10401

25.10.2017

Summarized Results of Ganciclovir Killing

Survival Rates