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Hijack Module (Fast robust oscillator) Notebook

25th June 2015

DH5α competent cells were transformed with the following biobricks:

BioBrick

Part

Backbone

Kit plate, Well

BBa_C0080

araC protein coding sequence

pSB1C3

3,11B

BBa_C0012

LacI protein coding sequence

pSB1C3

pSB1C3

 

The plates were kept at 37°C for 14 hours.

 

26th June 2015

Transformation results:

Biobrick

Number of colonies

BBa_C0080

0

BBa_C0012

3

 

As number of colonies obtained was very low, the transformation of these biobricks was repeated.

 

27th June 2015

Transformation results:

Biobrick

Number of colonies

BBa_C0080

3

BBa_C0012

60

 

Inoculation:

A colony from BBa_C0080 plate was inoculated in 7ml LB media + 7μL Chloramphenicol. Same was done for BBa_C0012. These cultures were kept at 37°C for 12 hours.

28th June 2015

No growth was observed in both the liquid cultures.

A new colony was inoculated again.

29th June 2015

Growth observed in the cultures of BBa_C0080 and BBa_C0012. Gylcerol stocks were made for both.

Plasmid isolation was done using Alkaline Lysis protocol for the 2 cultures. (1.5ml culture x 3)

Concentrations obtained from nanodrop:

Sample

Concentration (ng/μL)

A260/A280

BBa_C0080 (1)

3301.8

2.02

BBa_C0080 (2)

3670.9

1.98

BBa_C0080 (3)

2777.6

1.95

BBa_C0012 (1)

4560.0

1.97

BBa_C0012 (2)

4542.1

1.94

BBa_C0012 (3)

5123.5

1.61

 

A single digest was set for one of each of these plasmids:

(all volumes in μL)

BBa_C0012

BBa_C0080

PstI

0.3

0.3

10x NEBuffer 3

1

1

100x BSA

0.1

0.1

DNA

0.5

0.5

MilliQ H20

8.1

8.1

Total Volume

10

10

 

-          Kept at 37°C for 2 hours

-          Heat Inactivation: 80°C for 20 minutes

 

Gel Electrophoresis:

-          Digested samples run on a 1% gel.

-          Voltage: 100V

-          Time run: 50 minutes

 

Both samples showed an RNA smear. This occurred as the Alkaline Lysis solution I did not have RNAse. After observing this smear, RNAse was added to the solution.

Re-inoculation of the two cultures was done

 

 

1st July 2015

A plasmid isolation using Alkaline lysis was done.

Sample

Concentration (ng/μL)

A260/A280

BBa_C0080 (1)

4548.1

1.98

BBa_C0080 (2)

3411.9

2.01

BBa_C0080 (3)

3492.6

1.98

BBa_C0012 (1)

2258.4

1.99

BBa_C0012 (2)

2442.6

2.00

BBa_C0012 (3)

2691.4

1.97

 

A digest was set up with a sample of each plasmid and then run on a gel.

The gel showed bands at correct length, but the band intensity was extremely low and did not reflect the concentration obtained on nanodrop. A new method for plasmid isolation was needed.

2nd July 2015

BBa_K094120 arrived from iGEM Headquarters and was inoculated in 5ml LB media + 5μL Ampicillin. Kept at 37°C for 12 hours.

 

3rd July 2015

The liquid culture of BBa_K094120 was plated and kept overnight at 37°C

5th July 2015

A single colony was inoculated for BBa_K094120. Kept at 37°C for 12 hours

6th July 2015

Plasmid isolation of BBa_K094120 using Alkaline Lysis:

Sample

Concentration (ng/μL)

A260/A280

BBa_K094120 (1)

1050.8

1.88

BBa_K094120(2)

1493.7

1.95

BBa_K094120 (3)

1365.2

1.97

 

29th July 2015

1% gel run with all samples for the 3 plasmids BBa_C0080, BBa_C0012, BBa_K094120.

All bands seen had low intensity which did not correlate to the concentration on nanodrop.

 

11th August 2015

Revive glycerol stocks for BBa_C0080, BBa_K094120 and BBa_C0012. A 50 ml culture was inoculated for BBa_C0080 and BBa_C0012 for a Midiprep using Qiagen kit.

Kept at 37°C overnight

 

12th August 2015

Midiprep using Qiagen Kit results for BBa_C0080 and BBa_C0012:

Sample

Concentration (ng/μL)

A260/A280

BBa_C0012

7.0

3.62

BBa_C0080

27.8

2.07

 

Since results obtained were very low, a new “Qiagen spin miniprep” kit was obtained.

 

17th August 2015

Primary cultures used to make an overnight 5ml culture of BBa_C0080, BBa_C0012 and BBa_K094120.

18th August 2015

Qiagen Spin Miniprep protocol followed. Results:

Sample

Concentration (ng/μL)

A260/A280

BBa_K094120

250.7

1.91

BBa_C0080

165.5

1.92

BBa_C0012

195.4

1.92

 

A digestion was set to check plasmid length:

(all volumes in μL)

BBa_C0080

BBa_C0012

BBa_K094120

DNA

2

2

2

EcoRI

0.2

0.2

0.2

10x EcoRI Buffer

1

1

1

100x BSA

0.1

0.1

0.1

MilliQ H20

6.4

6.4

6.4

Total Volume

10

10

10

 

Gel: 1% gel run at 100V for 40 minutes.

The bands obtained for all 3 plasmids were at the correct length. The uncut plasmid ran faster than cut plasmid.

21st August 2015

Inoculated BBa_I13504 (GFP, used as reporter in oscillator construct) from previously transformed plate. Kept at 37°C for 12 hours

22nd August 2015

-          Miniprep of BBa_I13504:

Sample

Concentration (ng/μL)

A260/A280

BBa_I13504

122.4

1.94

 

-          Transformation of the biobrick BBa_B0034 (RBS) in DH5α competent cells (Ampicillin antibiotic)

-          Plates kept at 37°C for 14 hours

 

23rd August 2015

Inoculated a colony for BBa_B0034 and kept at 37°C for 12 hours.

24th August 2015

Plasmid Isolation using Qiagen Miniprep kit:

Sample

Concentration (ng/μL)

A260/A280

BBa_B0034

95.2

1.95

 

25th August 2015

-          Transformation of the biobrick BBa_B0015 (double terminator) in DH5α competent cells (Chloramphenicol antibiotic)

-          Plates kept at 37°C for 14 hours

26th August 2015

Transformation Result:

Number of colonies for BBa_B0015 = 8

-          Inoculated BBa_B0015 in 5ml LB media + 5 μL Chloramphenicol

-          Kept at 37°C for 12 hours

28th August 2015

Plasmid Isolation of BBa_B0015 using Qiagen Miniprep kit:

Sample

Concentration (ng/μL)

A260/A280

BBa_B0034

72.3

1.95

 

29th August 2015

Single Digest to check plasmid length:

(all volumes in μL)

BBa_B0015

BBa_I13504

BBa_B0034

DNA

4

2

2

EcoRI

0.2

0.2

0.2

10x EcoRI Buffer

1

1

1

100x BSA

0.1

0.1

0.1

MilliQ H20

5.7

5.7

5.7

Total Volume

10

10

10

 

Gel: 1% gel run with uncut and cut samples at 100V for 40 minutes.

The 3 single cut bands were at the right length.

 

6th September 2015

Digestion for 3A assembly of constructs of the oscillator construct:

(all volumes given are in μL)

BBa_

K094120

 

BBa_

C0080

BBa_

C0012

BBa_

I13504

BBa_

B0034

BBa_

B0015

Ampicillin Backbone

Chloramphenicol Backbone

Kanamycin Backbone

DNA

3

3

3

3

4

5

10

10

10

10x NEBuffer 2

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

2.5

BSA

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

EcoRI

0.5

0.5

0.5

-

-

-

0.5

0.5

0.5

XbaI

-

-

-

0.5

0.5

0.5

-

-

-

SpeI

0.5

0.5

0.5

-

-

-

-

-

-

PstI

-

-

-

0.5

0.5

0.5

0.5

0.5

0.5

H20

13

13

13

13

12

11

6

6

6

Total

20

20

20

20

20

20

20

20

20

-          Kept at 37°C for 5 hours

-          Heat Inactivation at 80°C for 20 minutes

-          The following devices were to be assembled:

-          BBa_K094120 + BBa_B0034 + Chloramphenicol backbone = Device 2a

-          BBa_C0080 + BBa_B0015 + Kanamycin backbone = Device 2b

-          BBa_C0012 + + BBa_B0015 + Ampicillin backbone = Device 2c

-          BBa_K094120 + BBa_I13504 + Kanamycin backbone = Device 2d

 

 

 

Ligation:

(all volumes in μL)

Device 2a

Device 2b

Device 2c

Device 2d

Ampicillin Backbone

-

-

2

-

Chloramphenicol Backbone

2

-

-

-

Kanamycin Backbone

-

2

-

2

BBa_K094120

2

-

-

2

BBa_B0034

2

-

-

-

BBa_C0080

-

2

-

-

BBa_B0015

-

2

2

-

BBa_C0012

-

-

2

-

BBa_I13504

-

-

-

2

T4 DNA ligase

0.5

0.5

0.5

0.5

Ligase Buffer

1

1

1

1

MilliQ H20

2.5

2.5

2.5

2.5

Total Volume

20

20

20

20

 

Ligation kept overnight at room temperature.

 

7th September 2015

-          Transformation of the ligation mix into DH5α cells

-          Kept at 37°C overnight

 

8th September 2015

Transformation results:

Ampicillin Negative Control : Lawn growth

Kanamycin Negative Control : Zero colonies

 

Plate

Number of Colonies

2a

10

2b

12

2c

Lawn growth

2d

5

 

Ampicillin degraded. 2c re-transformed

Inoculation of a single colony from each plate in 5ml LB media + 5μL antibiotic

Kept at 37°C for 12 hours

9th September 2015

Miniprep by Qiagen Kit:

Sample

Concentration (ng/μL)

A260/A280

2a

283.4

1.91

2b

122.3

2.09

2d

226.6

1.96

 

Single Digest with EcoRI to check plasmid length:

Backbone-Backbone ligation was observed on the gel.

A new ligation was setup. This time insert:vector ratio was increased. Kept at 37°C for 2 hours.

These ligation mix were transformed into Dh5α competent cells.

 

10th September 2015

Growth observed in negative control plates.

An overnight digestion was set for the individual plasmids again. Kept at 37°C for 12 hours

 

11th September 2015

Ligation set for 2 hours and then transformed.

12th September 2015

Colonies of device 2a, 2b and 2c obtained. No colonies on 2d.

3 colonies from each plate were inoculated, incubated for 12 hours at 37°C and miniprepped.

These were then digested with EcoRI to check the length of the plasmid on a gel.

The bands were as expected.

An overnight digest followed by 2 hour ligation was set to assemble to following device:

Device

Part1

Part2

Backbone

5a

2a

2b

pSB1A3

5b

2a

2c

pSB1K3

 

Two samples of 5b were assembled – one low copy and second high copy backbone

BBa_I13504 in Ampicillin backbone was chosen to assemble device 2d. This biobrick was digested and ligated.

Devices 5a, 5b and 2d were transformed.

13th Spetember 2015

Transformation Results:
                Negative Control: Zero

Plate

Number of Colonies

5a

15

5b (low copy)

70

5b (high copy)

26

2d

10

 

Three colonies were inoculated from each plate, incubated at 37°C and then miniprepped.

These were then single digested using EcorI to check on gel.

2d, 5a and 5b high copy showed correct bands.

 

18th September 2015

2d construct was characterized by induction with different concentrations of IPTG and arabinose.