Team:TU Munich/lab/notebook/part4

From 2011.igem.org

Cloning Part IV + Results

People: Simon, Alex, Marta, Wolfgang, Bea, Leah, Thorsten, Anna, Susan, Fabi

23-09-2011

People: Simon

Cloning

The product of the Ligation from 20-09-2011 (three samples of pSB6A1 with I746907, different I:V-ratios; pSB6A1 E,P cut as vector background) was purified today using glycogen/ethanol precipitation according to protocol.

The yielded product of this was then electroporated into DH5alpha. After incubation at 37 °C for 1 h in 1 ml SOC, 100 µl of the transformed cells were plated onto LB-Amp plates. The remaining 900 µl were spun down (4000 rpm, 5 min), resuspended in 400 µl and 100 µl of this concentrated bacteria culture were again plated onto LB-Agar plates.


24-09-2011

People: Susan

Cloning

The plates 1-3 (containing pSB6A1 with I746907) on which concentrated bacteria soulution was spread all showed lawns and were discarded. The plates 1-3 (containing pSB6A1 with I746907) on which 100 µl of the transformed cells were spread showed >1000 colonies. Plate 4 (vector background) spread with concentrated bacteria solution showed 85 colonies. Plate 4 (vector background) spread with normal bacteria solution showed 24 colonies.

From each of the plates 1 - 3, 4 colonies were picked and inoculated in LB Amp. Incubation at 37 °C over night.

25-09-2011

People: Simon

Cloning

The following overnight samples were miniprepped (all contain pSB6A1 with I746907):

1a, c = 55.0 ng/µl 1d, c = 59.5 ng/µl 2b, c = 108 ng/µl 2d, c = 68.5 ng/µl 3b, c = 52.0 ng/µl 3c, c = 78.5 ng/µl

Digest & Analytic Gel

The miniprepped samples were cut using E,P for analytic purposes:


Digest250911


The samples were then separated on an analytical 0.8 % agarose gel:

250911controlgel

All bands look fine, with bands around 4 kb (indicating the pSB6A1 plasmids) and 900 bp (indicating the I746907 insert). The band at around 5 kb is uncut vector with insert. This is due to the fact that the digest was incomplete because incubation time was only 10 minutes. However, as can be seen from the gel picture, the HF versions of the restriction enzymes which were used here produce usable results for analytical purposes in that time.

Transformation

Next, both the AND-Gate (K568001, in pSB1C3) and the reporter (I746907 in pSB6A1) were electroporated into CP919. To obtain cells with both plasmids, both plasmids were mixed in different ratios before transformation:


Trafo250911


After electroporation and incubation in SOC-medium (1h, 37 °C), the cells were plated onto LB Cam, Amp plates and incubated over night.

26-09-11

People: Marta, Simon

Cloning

Plates 1-3 showed no colonies.

Plate 4 showed 7 colonies. All of them were picked and incubated in 10 ml LB Amp, Cam at 37 °C over night.

27-09-11

People: Marta, Simon

Testing

We performed GFP-Assays with all 7 overnight cultures. All cultures were diluted to an OD of approx 0.2. Then, the GFP fluorescence and the OD600 was measured every hour. Also, a blank of LB medium was measured every hour (both fluorescence and OD600). Between measurements, the cells were incubated under different lighting conditions at 37 °C:

  • Blue light (465 nm) and red on-light (705 nm)
  • ambient light (lamp of the incubator)
  • in the dark

The fluorescence per cell can be calculated using the following formula:

"Fluorescence per cell" = (fluoresence(sample) - fluorescence (blank)) / (OD600(sample) - OD600 (blank))


Results

The results of the GFP-Assay are shown here:

270911Clone1

270911Clone2

270911Clone3

270911Clone4

270911Clone5

270911Clone6

270911Clone7


At t = 1h, the data is as expected: high fluorescence in the ambient light and the red & blue light samples, very low fluorescence in the dark samples.

Then, over the next few hours, this changes dramatically: the fluorescence per cell decreases.

The diagrams show that light does influence the GFP production in CP919 with our constructs. However, a definite quantitative statement based on this data is not possible. Further testing is needed, especially with regard to the following questions:

  • What is the temperature optimum of the blue light sensor and how does this influence the AND-Gate? For this, characterization of the bluelight sensor should be considered (see other iGEM teams).
  • Does the red light sensor work correctly (which could not be proven by previous experiments)? As no other teams managed to get this part to work properly, we need to characterize it further. The best way to do this would be testing of the following construct: BBa_K568000 + RBS + GFP
  • Has the red ligth sensor an asymptotic on steady state such that further radiation with red off light is needed ?
  • What are the optimum and maximum durations of measurement? For this, the modeling results should be considered.

06-10-11

People: Alex, Simon, Marta

Cloning

Parts BBa_I712074 (Kan; T7 prom) and BBa_I732017 (Amp; lacZ) were transformed into BL21 cells and incubated over night on the appropriate antibiotics.

Other work

Chemical competent BL21 (DE3) col+ RLF (?) cells were obtained from Lars Mitschke. In order to prepare electrocompetent cells, 20 ml LB medium are inoculated with 1 µl cells and incubated over night.

07-10-11

Alex, Simon, Marta

Cloning

New parts

The parts BBa_J23100 (Constitutive promoter), BBa_PSB4A5 (low copy plasmid) and BBa_K081012 (rbs-GFP) were transformed from the 2011 DNA distribution kit plates into DH5alpha using different amounts of DNA. This way we obtained 3 sample for each part with the following volumes of DNA:

  • Sample 1 - 0.5 µl
  • Sample 2 - 1.0 µl
  • Sample 3 - 8.0 µl

The RBS (BBa_J44001)was also transformed into DH5alpha. In this case we only had one sample with 0.5 µl DNA.

The 10 obtained cell suspensions were spread on agar plates and incubated overnight.

Results

rbs and lacZ in BL21

The transformation of rbs into BL21 was successful. 3x 5 ml were inoculated with clones and incubated over night. The transformation of lacZ did not yield any colonies.

Other work

We prepared some electro-competent cells. For this purpose we used BL21 (DE3) col+ rlf, which we had obtained from prof. Buchner the day before.

08-10-11

People: Alex

Cloning

T7 prom

A glycerin stock was prepared using the BL21 (DE3) cells transformed with T7 prom from yesterday.


Transformations

LB was inoculated with the cultures, using the following antibiotics: BBa_K081012 (3 clones used; Kan), BBa_J44001 (1 clone used; Amp), BBa_J23100 (3 clones used; Amp) and pSB4A5 (3 clones used; Amp).

Results

Transformations

All transformations from yesterday yielded colonies. The colonies from BBa_J23100 (const. prom) and from pSB4A5 were red (RFP!).


Contamination test of new electrocompetent cells

Amp and Kan plates did not yield any colonies. However, on the Cm plate, a slight, but confluent layer of bacteria could be detected.

09-10-11

Overview of Parts

Part Function To be digested with (on Monday) Plasmid-Backbone
BBa_J23100 constitutive promotor S,P BBa_J61002 (Amp & RFP)
BBa_I732017 lacZ X,P pSB1A2
BBa_J44001 rbs S,P pSB1A2
BBa_K081012 rbs-GFP-term X,P pSB1AK3
BBa_I712074 T7 promotor S,P pSB1AK8

Cloning

Minipreps

All overnight cultures were miniprepped.

1: J23100 in J61002, c = 89.5 ng/µl

2: J23100 in J61002, c = 61.0 ng/µl

3: J23100 in J61002, c = 84.5 ng / µl

4: pSB4A5, c = 113 ng/µl

5: pSB4A5, c = 127 ng/µl

6: pSB4A5, c = 175 ng/µl

7: K081012 in pSB1AK3, c = 79.0 ng/µl

8: K081012 in pSB1AK3, c = 114 ng/µl

9: K081012 in pSB1AK3, c = 66.5 ng/µl

10: J44001 in pSB1A2, c = 83.5 ng / µl


Planing of cloning

K568001 in pSB4A5:

  • Cut K568001 from pSB1C3 with E, P
  • Open pSB4A5 with E, P
  • ligate


I746907 in pSB1C3:

not necessary, because we make our own T7prom-GFP construct, because then we have the same GFP in all parts (reporter, positive control, light sensor-GFP constructs...)


Red Light Sensor with GFP:

  • Cut K081012 (rbs-GFP-term, in pSB1AK3, prepped 09.10.11) with X, P
  • Cut K568000 with P, S
  • Ligate (products cut with X and S can be ligated → scar)


'Constitutive Promoter and GFP:

  • Cut K081012 (rbs-GFP-term) with X, P
  • Cut J23100 (const. prom in vector J61002) with S, P
  • ligation

This results in J23100-K081012 construct in pSB1A2 (see description of vector J61002)


Constitutive Promoter and lacZ:

  • Cut J23100 (const. prom in vector J61002) with S, P
  • Cut I732017 (lacZ) with X, P
  • ligation

This results in J23100-I732017 construct in pSB1A2 (see description of vector J61002)


T7promoter and GFP:

  • Cut I712074 (T7 prom, in pSB1AK8) with S, P
  • Cut K081012 (rbs-GFP-term) with X, P
  • Ligate


For re-characterization of blue light promoter (blue light prom + lacZ):

  • Part K238015 could be used for this (this part is the blue light promoter plus GFP E0040, which is the same version of GFP as in K081012), but is not on a shipment plate → need to make that part.
  • → ligate blue light promotor with K081012
  • use the tube labeled „8, blue light prom, cut with S, P, 1.9.“ (is in „Wichtige Dinge Box“)
  • cut K081012 with X, P
  • ligate
  • vector: pSB1A2 (according to wiki. It doesn’t say anything on the tube, and because there are only a few µl left, after ligation and trafo the cells should be plated on three plates (with amp, kan or cam) to make sure we definately have something!)

Other Work

LB-Agar plates with Amp, Cam, or Kan were prepared.

Some 1.5 ml and 2 ml Eppendorf tubes were autoclaved.

10-10-11

People: Alex, Marta, Simon

Cloning

Restriction (IDA1)

We needed to digest existing parts in order to be able to construct the following parts: - constitutive promotor with lacZ - constitutive promotor with rbs-GFP-term - T7 promotor with rbs-GFP-term - blue light sensor with rbs-GFP-term - red light sensor with rbs-GFP-term - AND-gate in pSB4A5 (low copy vector)

Digest 10-10-11 Part 1

All tubes of this Digest are stored in "Wichtige Dinge" Box 4 and marked with AH2.


Digest 10-10-11 Part 2

All tubes of the this Digest are stored in iGEM Box 3 and marked with IDA1.

The samples were applied onto a 0.8 % Agarose gel. We expected the following sizes of fragments:

Part Insert Backbone (+ Insert) Restriction
1: BBa_J23100 0.8 kbp 2 kbp S,P
2: BBa_I732017 3 kbp 2 kbp X,P
3: BBa_K081012 0.8 kbp 3.2 kbp X,P
4: BBa_I712074 - 3.5 kbp S,P
5: BBa_K568000 - 5.8 kbp S,P
6: BBa_K568001 6.8 kbp 2 kbp E,P
7: pSB4A5 - 4.5 kbp E,P

The parts written in orange are needed for the following ligations. The others are extracted as well, in order to obtain part backups. The gel was run for 1:30 h at 110 V.

101011 restriction Alex bearbeitet

All the bands are as expected and were extracted using the kit from Qiagen, as the Wizard kit was empty.


Transformation

Transformations were prepared of the parts used in digestions 2a, 2b, 4 and 5, in order to have DNA-backup clones.

Testing

We want to redo the characterization of AND-Gate with I746907. The liquid cultures of the CP919 cells with which the characterisation was performed on 27-09-11 were stored in the fridge since then. Today, 50 µl of the cultures of trafo 4, clones 4 and 6 were spread onto LB Cam, Amp plates to see if the bacteria survived the 2 weeks in the fridge. If there are colonies, they should be inoculated and used for testing again. In addition to this, glycerol stocks should be prepared from these cells.

11-10-11

People: Alex, Simon, Marta

Testing

Testing of AND-Gate in CP919

From each of the two plates with CP919 containing K568001 and I746907, 2 colonies were picked and inoculated into 10 ml LB Amp, Cam, and incubated at 37 °C.

The original plan was to splut the cultures into 3 parts once the bacteria had grown to an OD600 of 0.1 and then continue incubation as follows:

  • Incubation in the dark, 37 °C
  • Incubation under red off-light (650 nm), 37 °C
  • Incubation under ambient light, 37 °C

However, the cultures grew very slowly if at all. Maybe they didn't keep both AB resistances during storage in the fridge and the reason why we got colonies on the LB Amp Cam plates is that the plates were too old (23-09-2011). Because of the D600 was approx 0.006 after a few hours of incubation, this might be the case. Because of that, the cultures were not split as mentionned above. Instead, they were incubated under red-off light at 37 °C over night.


Cloning

The restricted parts from yesterday were ligated according to the following scheme:

Ligations 12, 21 and 23 were not performed.

Tabelle igem 1

Other Work

In order to further test the prepared electrocompetent BL21 (DE3), bacteria, which grew on the Cm-Plate were inoculated into LB (Cm) and incubated over night.


Results

Both plates on which the CP919 cells with Andgate and reporter were spread yesterday showed many colonies.

12-10-11

People: Marta, Alex

Cloning

Transformations

The following transformations were performed:

  • I732017 (lacZ) in BL21 (DE3) -> negative control for Miller Assay; plated onto Amp
  • I712074 (T7 promotor) in BL21 (DE3) -> negative control for Miller Assay; plated onto Kan
  • K238013 in DH5 alpha -> DNA backup; plated onto Amp and Cm

Other Work

A new chloramphenicol stock (30 mg/ml in 100 % ethanol; sterile filtrated) was prepared.


Results

Contamination test BL21 cells:

The cells grew in the LB (Cm) medium. The strain we obtained has a natural chloramphenicol resistence. Thus, the growth is expected.

13-10-11

People: Marta

Cloning

"Transformations"

The samples from the following Ligations were Transformed again and plated on agar:

  • Ligation 5
  • Ligation 7
  • Ligation 13
  • Ligation 15

Also the Ligations 6 and 14 were plated again using a gretaer volume (200µl instead of 150 µl)

Colonies from the ligations that worked have been picked and will be incubated over night in liquid agar.

Results

These are the results of the Ligations that were plated the day before and cultivated over night.

Ligation number Colonies? Comments
2 yes
4 yes
6 no Transformed cells were plated again and a new transformation was carried out.
8 no
10 yes
14 no Transformed cells were plated again and a new transformation was carried out.
16 no
18 yes
20 yes
22 yes
24 yes
LacZ in BL21 yes
T7 in BL21 yes Picking was not possible, so a dilution was plated on agar.
K238013 in DH5alpha (Amp) yes
K238013 in DH5alpha (Cm) yes Colonies are violet

14-10-11

People: Alex, Simon, Marta, Bea, Thorsten, Fabipups

Cloning

Digestion

Digestion of the following parts in order to repeat some of the ligations:

Restriction 141011


Plasmid Mini-Preps and Gylcerol-Stocks

Over night cultures from 13-10-11 were mini-prepped and glycerol-stocks were made. If no strain ist mentioned, the parts were transformed into DH5 alpha cells. The plasmid mini-preps and the glycerol-stocks are marked "AH4".


Part Function Concentration (if prepped) Glycerol-stock prepared?
I732017 lacZ 138 ng/µl yes
I732017 lacZ (other charge) 110 ng/µl yes
I712074 T7 promotor (clone 1) 113 ng/µl no
K568000 red light promotor 94.5 ng/µl yes
I712074 T7 promotor 141 ng/µl yes
K238013 blue light promotor 176 ng/µl yes
K238013 blue light promotor (other charge) 218 ng/µl no
I712074 (BL21) T7 promotor no prep yes
I712074 (BL21) T7 promotor no prep yes


Inoculation

Due to too much growth, the transformation of I732017 (lacZ) in BL21 was diluted and plated again yesterday. Today, LB (Amp) was inoculated with two different colonies and incubated over night at 37 °C.

Ligation

In order to confirm our results we transformed the following ligations, that had not been transformed yet:

  • Ligation 1
  • Ligation 3
  • Ligation 13
  • Ligation 15

Ligation 13 and 15 had already been transformed the day before, but only with a small amount of sample. This time we used the entire volume in order to obtain more colonies.

This week's ligations had been plated with only 150µl of the cells culture. In order to increase the density on the plates we plated the ligations again, this time using the entire volume. The Ligations that we transformed today were also plated this way.

overview

Blue light promoter:

"This part was actually put in a pBR322 vector. This is a vector which has a low copy number (around 15-20). This is needed to make the promoter work properly in E.Coli. The low copy number ensures a good ratio between the promoter and its repressor, which is naturally present in E.Coli. When a high copy number is used, the promoter is abundant which results in a constituitivly active promoter." source http://partsregistry.org/Part:BBa_K238015:Design

--> subcloning of K568003 into low copy vector pSB4A5 (was in pSB1A2)

15-10-11

People: Marta

Cloning

Preparation of restricted DNA and Ligation

Gel of the digested DNA: 5102011verdaufertig

The T7 Promoter was cut with S,P and not with E,P as described in the picture.

The different bands were cut out and stored in the -20 freezer in the Box 3. (The tubes are labeled 1-7 and contain pieces of gel)

Results

Ligations

These are the results of our ligations. We plated on three different dates (12.10.2011, 13.10.211 and 14.10.2011) depending on the results.

Ligationergebnisse1gut


Constitutive promoter (J23100) with LacZ (I732017)

The plasmid contains an RFP-casette that is cut out when the ligation is performed correctly. We could observe, that it takes some time for the cells to produce the RFP. After they have reached a certain size, they turn violet. As the table shows we have both violet and white colonies. In order to obtain the right cells we will have to pick the withe colonies. This ligation probably worked, since the cells of the vector background, that serve as a control are mostly violet. The ones that are white are not big enough to produce the RPF, but are likely to do so after further incubation.

T7-promoter (I712074) with rbs-GFP (K081012)

The measurements from the 12.10 and the 13.10 were performed with a very low concentration, which is probably the reason why we otained almost no cells. The results from the 14.10 prove that the ligation must have worked, for we obtained cells in all samples but the vector background.



Ligationergebnisse2gut


Constitutive promoter (J23100) with rbs-GFP (K081012)

Under the UV-Lamp it is easy to distinguish the cells containing RFP from the ones containing GFP. The fact, that there are green fluorescent cells means the ligation has worked.

15102011042

15102011044

Red light sensor (K568000) and rbs-GFP (K081012)

This ligation also seems to have worked. even thought there are some cells on the plate with the vector background, the ration is still ok. Also we could observe fluorescence in the sample number 15. The others didn't show luminiscence yet for they had not been incubating as long as sample 15


Ergebnisse3gut


AND-Gate (K568001) in psBB4A5

Since there are as many colonies on the ligation-plate than on the vector background we believe this ligation did not work. We have to find out why the cells did not turn violet, as they should have, for the psBB4A5 contains an RFP-casette, that is cut out when the ligation is correctly performed.

Blue light sensor (K238013) with rbs-GFP (K081012)

The data indicates, that the ligation may not have worked. Since we decided to characterize the blue light sensor with lacZ we will probably not repeat this ligation even though it didn't work.


Ligations: Excitation Test

Colonies on ligations 10 (const. promotor with GFP) and 15 (red light sensor with GFP) produced (green to yellow) fluorescence when excited with light of 380 nm. This might imply that the ligations worked and the parts are successfully producing GFP. In the case of red light sensor with GFP, the ambient light seemed to be sufficient to trigger a leaky production of GFP.

17-10-11

Cloning

Ligations from 11-10-11

In order to find out, whether the ligations of const. prom. + lacZ in DH5 alpha were successful (Ligations 1-4), 2 colonies of each ligation plate were inoculated into LB (Amp). On the next day, they will be tested using ONPG and negative controls. Furthermore, 6 colonies of T7 prom. + rbs-GFP (2x Lig. 7 14.10.; 1x Lig. 5 14.10., Lig. 6 14.10., Lig. 7 13.10., Lig. 5 13.10.) were inoculated into LB (Kan), in order to prep the plasmids, if necessary.

Results

18-10-11

People: Wolfgang, Bea, Fabi, Marta, Thorsten, Leah, Susan

Cloning

Purification

The samples (from the digestion) that were put in the freezer on the 15.10.11 were purified with the wizard promega kit.

Following concentrations were measured:

1) const.prom J23100 (P,S) 22,5 ng/µl

2) LacZ I732017 (P,X) 22,0 ng/µl

3) cbs-GPS-term K081012 (P,X) 19,6 ng/µl

4 )T7-prom I712074 (S,P) 21,5 ng/µl

5 )Red light K568000 (P,S) 20,5 ng/µl

6 )AND Gate 568001 (E,P) 14,5 ng/µl

7) Plasmid psB4A5 (E,P) 23 ng/µl


Mini-Prep

Mini-prep (Metabion) of the overnight cultures from the 17.10.11.

1) Lig.7: T7+GFP in DH5alpha (Ligation 13.10.11) 87,5 ng/µl

2) Lig.7: T7+GFP in DH5alpha Kan (Ligation 14.10.11) 52,5 ng/µl

3) Lig.7: T7+GFP in DH5alpha Kan (Ligation 16.10.11) 125,0 ng/µl

4) Lig.5: T7+GFP in DH5alpha Kan (Ligation 14.10.11) 82,5 ng/µl

5) Lig.5: T7+GFP in DH5alpha Kan (Ligation 13.10.11) 113,0 ng/µl

6) Lig.6: T7+GFP in DH5alpha Kan (Ligation 14.10.11) 85,0 ng/µl

7) Lig.2: const.prom+LacZ in DH5alpha Amp (Ligation 12.10.11) 77,5 ng/µl

8) Lig.2: const.prom+LacZ in DH5alpha Amp (Ligation 12.10.11) 82,5 ng/µl

9) Lig.3: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 82,5 ng/µl

10) Lig.3: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 205,0 ng/µl

11) Lig.1: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 90,0 ng/µl

12) Lig.1: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 65,0 ng/µl


Analytical Digest of Minipreps

The above Minipreps from above were digested via Microwave digestion and applied onto a 0,8% Agarose gel.

Ligations

The following Ligations were performed using the purified samples from the digestion from 15.10.11. The first ligations were made using 0.5 µl of the T4 DNA Ligase from NEB. Samples 4,8,11,12 were incubated at room temperature.

Ligation1 18.10.11.jpg

Ligation2 18.10.11.jpg


Ligations were repeated using 1 µl of the T4 DNA Ligase from metabion.

Ligation3 18.10.11.jpg

Ligation4 18.10.11.jpg

Restriction Digest

K568004 from Box T7, clone 6-2 (61.5 ng/µl) was digested using E,P. This is in order to ligate it into pSB4A5, which was already digested.

Ligation of K568004 with pSB4A5

Ligation of K568004 and pSB4A5 from the digestion of 15.10.11 were performed following this protocol:

Ligation5 18.10.11.jpg

Transformation

The part K568003 (T7-lacZ reporter plasmid; in pSB1AK8) was transformed into BL21(DE3) cells and plated on Amp plate over night at 37 °C. For the transformation, clone 2c 9.9.11 131 ng/µl was used.


Other Work

Media

Kan, Cam and Amp LB plates were made

S-gal plates with Amp and LB were made

LB liquid media was made

19-10-2011

People: Thorsten, Susan, Marta, Leah, Bea, Wolfgang

Other Work

Picking

-K568003 in BL21DE3: Plate from 18.10.11 Trafo T7-LacZ clone 2 in BL21 (amp)

-Red Light with GFP: Plate from 13.10.11 Ligation 15 (cam)

-Constitutive Promoter + GFP : Plate from 12.10.11 Trafo Ligation 10 in DH5alpha (amp)

-pBad/araC I0500 in DH5alpha

Digestion

Digestion of the plasmid preps from 18.10.11 with: 1 µl DNA

1 µl SpeI

1 µl Pst

7 µl water

for 1 h in 37°C

Analyt. gel run; 130 V, 1,5 h

111019 testdigest miniprep vom181011-2

Glycogn-ethanol-precipitation

Ligations from 18.10.11, but only from the samples where the Metabion T4 ligase was used


Ligation

Ligation 19 10 2011

The Ligation Number 4 (the control, which would have been just the plasmid) was not performed, because there wasn't enough DNA left.

Transformations


in JT2:

ID:10 Lig.3: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 205,0 ng/µl: of Mini-prep (Metabion) of the overnight cultures from the 17.10.11. --> Amp

RBS in pSB1A2 (for negativ control) --> Amp


in DH5alpha:

Ligations of 18.10.11 with following ID's: 9-12 (AND-Gate in low copy pSB4A5) and 13-16 (choose first input in pSB4A5) (1-8 was frozen @ -20°C) --> Amp


in BL21(DE3)

ID:10 Lig.3: const.prom+LacZ in DH5alpha Amp (Ligation 14.10.11) 205,0 ng/µl: of Mini-prep (Metabion) of the overnight cultures from the 17.10.11. --> Amp

20-10-2011

People: Susan, Leah, Bea, Wolfgang, Alex

Cloning

Mini-Prep

Part Clone Concentration [ng/µl]
Lig. 10 from 15-10-2011 LB+Amp:const-prom+rbs GFP 1 128
3 122
4 136
Lig. 15 from 15.10.11: LB+Cm red light+rbs-GFP 1 131
2 154
3 107
4 111
pBad Ara DH5alpha I0500 19-10 Kan 1 135
2 152

Clone 2 of 19-10-2011 Lig. 10 in DH5alpha LB+Amp did not yield a culture of bacteria.


Digestion


restriction digestion of Red light + GFP and const. promoter with E and P to subclone it in pSB1C3 (also cut with E and P)

Digest201011

prep. gel

201011 prep digest redlight+gfp constprom+gfp pbs1c3 beschriftet

purified dna is stored in the "igem box 1" in one corner

Ligation


Ligation201011


Glycogen/Ethanol Precipitation and Transformation Ligations from 19.10. were concentrated and purified via glycogen ethanol precipitation. 1-3 (T7-GFP) are transformed into DH5alpha 5-8 were transformed into JT2 plated on LB+Cm (1-3) LB+ Amp (5-8)

Other Work

Gylcerol Stocks

Glycerol stocks have been prepared from the following strains: Lig. 10 15.10.11: const-prom+rbs GFP in DH5alpha LB+Amp (clone 1); Lig. 15 15.10.11: red light+rbs-GFP LB+Cm (clone 1) in DH5alpha; 19.10.11 LB+Amp Trafo T7-lacZ in BL21 clone 2 K568003; pBad Ara DH5alpha I0500 19.10. Kan (clone 1).


Electrocompetent Cells

5 ml of over night culture TOP10f' cells were inoculated into 250 ml LB. However, we might not need this strain after all.


Preparations for lacZ - Reporter construct test

5ml LB+ Amp K568003 Bl21 DE3 (inoculation with o.n.culture from 19.10) 5ml Lb+ Amp LacZ without promoter in Bl21 DE3 (inoculation with glycerol stock) 5ml LB+ Kan T7 promoter in BL21 De3 (inoculation with glycerol stock)

Transformation

Red light+GFP and const. promoter + GFP (Minipreps 20.10.) 1ul each in JT2 cells


Picking

-const.prom + LacZ in BL21DE3, ID10 Lig.3 vom 19.10.11 (amp)

-Nur Vektor mit AB in JT2,RBS in PSB1A2 vom 19.10.11 (amp)

-AND-Gate in low copy Vektor (PSB4A5) JT2, Lig.9 vom 18.10.11 in DH5alpha (amp)

-AND-Gate in low copy Vektor (PSB4A5) JT2, Lig.10 vom 18.10.11 in DH5alpha (amp)

-AND-Gate in low copy Vektor (PSB4A5) JT2, Lig.11 vom 18.10.11 in DH5alpha (amp)

-K568004, Lig.14 vom 18.10.11 in DH5alpha (amp)

-K568004, Lig.15 vom 18.10.11 in DH5alpha (amp)

-const.prom + LacZ in JT2, ID10 Lig.3 vom 19.10.11 (amp)

21-10-11

People: Bea, Leah, Wolfgang, Alex, Marta, Thorsten

Cloning

analytical digest

The following ligations were digested analytically:


Analyt verdau 21.10.11.jpg 211011 analyt digest

The digest shows that the ligation of the constituive promotor and lacZ worked.

The digest shows that the ligation of the AND-Gate into pSB4A5 seems to have failed. This has to be repeated.

The following samples were digested preparative:

using 1a and 1 b and 6c and 7c for further work:

Digest 21-10-11 2


Ligation:

Ligation 211011


Other work

Picking

- Red light + GFP in JT2 vom 20.10 (LB+cam)

- Lig.1 from 19.10 T7 + GFP in DH5alpha (LB+cam)

- Lig.2 from 19.10 T7prom + GFP in DH5alpha (LB+cam)

- Lig.3 from 19.10 T7prom + GFP in DH5alpha (LB+cam)

- const.prom + GFP in JT2 from 20.10 (LB+Amp)

- Lig.6 19.10 blue light in PSB4A5 in JT2 (LB+Amp)

- Lig.7 19.10 blue light in PSB4A5 in JT2 (LB+Amp)

- Lig.5 19.10 blue light in PSB4A5 in JT2 (LB+Amp)

Overnight cultures

- RBS in PSB1A2 19.10 in JT2 (LB+Amp)

Gly-Stocks

- RBS in PSB PSB1A2 in JT2 from 19.10.11 (LB+Amp)

- LacZ Test: T7.prom in BL21DE3 (LB+Kan)

- LacZ Test: LacZ without prom in BL21DE3 vom 20.10 (LB+Amp)

- LacZ Test K568003 in BL21DE3 20.10 (LB+Amp)

22-10-11

People: Wolfgang, Bea, Leah, Alex, Lachi

Cloning

Purification

The ligations 1-12 from 21-10-11 were purified.

The ligations 1-4 ( K568004+pBAD/araC in pSB4A5) and the ligations 9 to 12 ( AND-Gate into pSB4A5) were transformed into JT2.

The ligations 5-8 ( const prom+lacZ in pSB1C3) were transformed into DH5alpha.

The repeated ligations 1-7 from 22-10-11 were purified.

The ligations 1-3 (red light+GFP in pSB1C3) and the ligations 4-6 (const prom+lacZ in pSB1C3) and ligatoin 7 (pSB1C3 vector background) were transformed into DH5alpha.


Ligations

Ligations from 20-10-11 have to be repeated because the transformations from yesterday have not been plated out.

Therefore the old transformations from yesterday were plated out.

The following ligations were repeated for one hour at room temperature:

Ligation201011

The ligation 4 to 7 were as well repeated over night at 16 °C.

Analytical Digest

The following samples were digested analytically:


Analytic digest 22-10-11

Purification of Ligation

Minipreps

Minipreps of the following cultures were made:

- Lig.1 (19.10) T7 + GFP in DH5alpha clone 1a (cam) 75,5 ng/µl

- Lig.1 (19.10) T7 + GFP in DH5alpha clone 1b (cam) 75,5 ng/µl

- Lig.2 (19.10) T7-prom + GFP in DH5alhpa clone 2a (cam) 83,5 ng/µl

- Lig.2 (19.10) T7-prom + GFP in DH5alhpa clone 2b (cam) 73,0 ng/µl

- Lig.3 (19.10) T7-prom + GFP in DH5alhpa clone 3a (cam) 83,5 ng/µl

- Lig.3 (19.10) T7-prom + GFP in DH5alhpa clone 3b (cam) 78,0 ng/µl

- Lig.6 (19.19) blue light + LacZ in PSB4A5 in JT2 clone 6a (Amp) 82,0 ng/µl

- Lig.6 (19.19) blue light + LacZ in PSB4A5 in JT2 clone 6b (Amp) 94,5 ng/µl

- Lig.7 (19.19) blue light + LacZ in PSB4A5 clone 7a (Amp) 88,5 ng/µl

- Lig.7 (19.19) blue light + LacZ in PSB4A5 clone 7b (Amp) 80,0 ng/µl

- Lig.5 (19.19) blue light + LacZ in PSB4A5 in JT2 clone 5a (Amp) 89,5 ng/µl

- Lig.5 (19.19) blue light + LacZ in PSB4A5 in JT2 clone 5b (Amp) 121,0 ng/µl

an electrophoresis run with the analtical digest was performed:

111022 analytisches gel miniprep ligation 111019


Transformation

const. prom+lacZ on pSB1C3 was transformed into DH5alpha

RBsS iin pSB1A2 was transformend into BL21 DE3

The AND-GATE clone 6b on pSB1C3 was transformed into DH5alpha

The const.prom +GFP was transformed into BL21 DE3

Testing

Miller Assay of Reporter Plasmid

In order to test the reporter plasmid part (K568003), several cultures have been inoculated yesterday into LB. The T7 promotor and lacZ serve as negative controls in BL21 (DE3), while the constitutive promotor + lacZ is a positive control. As the Miller Assays yielded some problems, we decided to make a few changes in the protocol. The protocol is as follows:

  1. The cultures were grown under the wanted conditions.
  2. 80 µl aliquots of permeabilization solution were prepared into 1.5 ml tubes.
  3. At each time point, the OD_600 was measured and 20 µl (or less, if ONPG reacts too quickly) of cells were added to the prepared tubes.
  4. After all time points have been conducted, the samples and the substrate solution were incubated at 30 °C for at least 20 min.
  5. 600 µl substrate solution were added to each tube and the start time of the ONPG reaction was noted.
  6. When the yellow color was sufficient, 700 µl stop solution were added and mixed well. The stopping time was noted.
  7. The tubes were spinned for 10 min at maximal speed.
  8. 200 µl of solution are transferred to the cuvette while avoiding the transfer of floating material, which might lead to light scattering.
  9. OD_420 and OD_550 are measured and the Miller Units are calculated as follows:
Miller Units = 1000 * (ABS420 - (1.75 * ABS550)) / (time [min] * volume [ml] * ABS600)

Recipes

Permeabilization Solution (80 µl/sample; 100 ml)

Component Concentration Mass/Volume
Na2HPO4 100 mM 1.78 g
KCl 20 mM 149.1 mg
MgSO4 2 mM 49.2 mg
CTAB 0.8 mg/ml 80 mg
SDS 0.1 % 500 µl
beta-Mercaptoethanol 5.4 µl/ml 540 µl

Note: The added SDS lead to a participation of components in the solution. This might be due to the quality of SDS, but it might also be an unwanted reaction. Use fresh SDS the next time!


Substrate Solution (600 µl/sample; 250 ml)

Component Concentration Mass/Volume
Na2HPO4 60 mM 2.67 g
NaH2PO4 40 mM 1.56 g
beta-Mercaptoethanol 2.7 µl/ml 675 µl
ONPG 1 mg/ml 250 mg

Note: The ONPG needs to be added FRESHLY. The solution needs to be stored at 4 °C if not used.


Stop Solution (700 µl/sample; 250 ml)

Component Concentration Mass/Volume
Na2CO3 1 M 31 g


Red light+ GFP test

The following parts were inoculated for the test in incubated at 37°C in off-light(710nm) .

red light+gfp in JT2

const prom+gfp in JT2

pSB1A2 in JT2


Blue light and lacZ Test

The following parts were inoculated for the test and incubated at 37°C in the dark.

blue light+ lacZ in JT2 gly-stock 5b

const prom +lacZ in JT2

pSb1A2 in JT2

Other Work

Media

LB Amp and LB Cam plates were made.


Glycerin Stocks Glycerin Stocks of the following parts were prepared:

red light +GFP in JT2 (stored in assay box)

Constituive promotor+GFP in JT2 (stored in assay box)


Results

Miller Assay of Constitutive Promotor + lacZ

At first, the T7 promotor and the constitutive promotor + lacZ were tested, in order to find out the right settings for the assay. Therefore, thre samples were taken from each culture, which had been incubated over night at 37 °C. The ONPG reaction took 37 min to be completed.

Miller Assay 111022 const lacZ

The assay implies, that the measurement is working as expected. It also implies that the constitutive promotor + lacZ part seems to work, as it produces lacZ.


Miller Assay of K568003

In the actual assay, we used BL21 (DE3) bacteria transformed with K568003 (our reporter plasmid), I712074 (T7 promotor; as negative control), I732017 (lacZ without promotor; as negative control) and our new constitutive promotor (J23100) + lacZ (as positive control). After addition of IPTG at 0.01 mM, 0.1 mM and 1 mM to the reporter plasmid, measurements were conducted after 10 min, 20 min, 30 min, 40 min, 60 min and 90 min.

Miller Assay 111022 Reporter Plasmid

The file shows that our reporter plasmid produces considerably higher amounts of lacZ as the controls, or the uninduced culture. This means that our part indeed works as expected. However, if the constitutive promotor + lacZ is compared to lacZ only, it shows that the our new construct might not work, or the leaky level of lacZ is just too high from the beginning.

The following table shows the data generated by the assay.

Miller Assay 111022 Reporter Plasmid Data

23-10-11

People: Bea, Simon, Lachi, Wolfgang

Cloning

Ligation


over night ligation was purified via glycogen/ethanol precipitation

Over night plates from the transformations show clones on almost every plate; even of thoose which incubated in 1 ml SOC-Medium over night

The following overnight cultures were prepared from the transformations of 22-10-11:

1. in DH5alpha const-prom+lacZ on pSB1C3 Ligation 6 from 22-10-11 clone 1

2. in DH5alpha const-prom+lacZ on pSB1C3 Ligation 6 from 22-10-11 clone 2

3. in DH5alpha AND-Gate clone 6b on pSB1C3 clone 1

4. in DH5alpha AND-Gate clone 6b on pSB1C3 clone 2

5. in DH5alpha const-prom+lacZ on pSB1C3 Ligation 7 from 22-10-11 clone 1

6. in DH5alpha const-prom+lacZ on pSB1C3 Ligation 7 from 22-10-11 clone 2

7. in JT2 AND-Gate on pSB4A5 Ligation 9 from 22-20-11 clone 1

8. in JT2 AND-Gate on pSB4A5 Ligation 9 from 22-20-11 clone 2

9. in JT2 AND-Gate on pSB4A5 Ligation 10 from 22-20-11 clone 1

10.in JT2 AND-Gate on pSB4A5 Ligation 10 from 22-20-11 clone 2

11.in JT2 AND-Gate on pSB4A5 Ligation 11 from 22-20-11 clone 1

12.in JT2 AND-Gate on pSB4A5 Ligation 11 from 22-20-11 clone 2

13.in BL21 DE3 RBS in pSB1AA2 clone 1

14.in BL21 DE3 RBS in pSB1AA2 clone 2

15.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 2 from 22-10-11 clone 2

16.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 1 from 22-10-11 clone 2

17.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 1 from 22-10-11 clone 1

18.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 2 from 22-10-11 clone 1

19.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 3 from 22-10-11 clone 2

20.in JT2 K568004+pBAD/araC on pSB4A5 Ligation 3 from 22-10-11 clone 1

21.in DH5alpha const-prom+lacZ on pSB1C3 Ligation 5 from 22-10-11 clone 2

22.in DH5alpha const-prom+lacZ on pSB1C3 Ligation 5 from 22-10-11 clone 1

23.in BL21 DE3 const prom+GFP on pSB1A2 clone 2

24.in BL21 DE3 const prom+GFP on pSB1A2 clone 1



Transformations""

DH5alpha was transformed with following ligations:

Trafo 231011

additional was BL21(DE3) and JT 2 transformed with T7-Promoter+GFP

Testing

GFP-Assay

accidentally the over night cultures were incubated with 710 nm (on light); deactivation for 2h with 650 nm


Results

Trafo 231011

Other Work

24-10-11

Alex, Simon,...

Cloning

Miniprep and Analytical Digest

Minipreps and Analytical Digest of Overnight cultures:

All overnight cultures from the 23-10-11 were prepped and digested analytically.

The following overnight cultures were prepared from the transformations of 22-10-11 (stored in -20°C in a bag):

1. const-prom+lacZ on pSB1C3 Ligation 6 from 22-10-11 clone 1 - 19 ng/µl

2. const-prom+lacZ on pSB1C3 Ligation 6 from 22-10-11 clone 2 - 8 ng/µl

3. AND-Gate clone 6b on pSB1C3 clone 1 - 18 ng/µ

4. AND-Gate clone 6b on pSB1C3 clone 2 - 19 ng/µl

5. const-prom+lacZ on pSB1C3 Ligation 7 from 22-10-11 clone 1 - 61 ng/µl

6. const-prom+lacZ on pSB1C3 Ligation 7 from 22-10-11 clone 2 - 76 ng/µl

7. AND-Gate on pSB4A5 Ligation 9 from 22-20-11 clone 1 - 4.5 ng/µl

8. AND-Gate on pSB4A5 Ligation 9 from 22-20-11 clone 2 - 29.5 ng/µl

9. AND-Gate on pSB4A5 Ligation 10 from 22-20-11 clone 1 - 74 ng/µl

10.AND-Gate on pSB4A5 Ligation 10 from 22-20-11 clone 2 - 63 ng/µl

11.AND-Gate on pSB4A5 Ligation 11 from 22-20-11 clone 1 - 15.5 ng/µl

12.AND-Gate on pSB4A5 Ligation 11 from 22-20-11 clone 2 - 6.5 ng/µl

13.RBS in pSB1AA2 clone 1 - 15.5 ng/µl

14.RBS in pSB1AA2 clone 2 - 10.5 ng/µl

15.K568004+pBAD/araC on pSB4A5 Ligation 2 from 22-10-11 clone 2 - 12.5 ng/µl

16.K568004+pBAD/araC on pSB4A5 Ligation 1 from 22-10-11 clone 2 - 7 ng/µl

17.K568004+pBAD/araC on pSB4A5 Ligation 1 from 22-10-11 clone 1 - 13 ng/µl

18.K568004+pBAD/araC on pSB4A5 Ligation 2 from 22-10-11 clone 1 - 9 ng/µl

19.K568004+pBAD/araC on pSB4A5 Ligation 3 from 22-10-11 clone 2 - 14.5 ng/µl

20.K568004+pBAD/araC on pSB4A5 Ligation 3 from 22-10-11 clone 1 - 6 ng/µl

21.const-prom+lacZ on pSB1C3 Ligation 5 from 22-10-11 clone 2 - 70 ng/µl

22.const-prom+lacZ on pSB1C3 Ligation 5 from 22-10-11 clone 1 - 62 ng/µl

23.const prom+GFP on pSB1A2 clone 2 - 40 ng/µl

24.const prom+GFP on pSB1A2 clone 1 - 34.5 ng/µl



241011 analyt digest 1 24


Preparative Digest

1: plasmid prep # 15

2: plasmid prep # 16

3: plasmid prep # 17

4: plasmid prep # 18

5: plasmid prep # 19

6: plasmid prep # 20

7: plasmid prep # 21

8: pSB1C3

cut with E and S; 20 µl mix


Sequencing

The following samples from the Minipreps were sent for sequencing:

1. const prom +lacZ on pSB1C3 Ligation 6 from 22.10.11 clone 1

2. Const prom +lacZ on pSB1C3 Ligation 7 from 22.10.11 clone 1

3. K568004+pBAD/araC on pSB4A5 Ligation 1 from 22.10.11 clone 1

4. K568004+pBAD/araC on pSB4A5 Ligation 2 from 22.10.11 clone 1

5. const prom +lacZ on pSB1C3 Ligation 5 from 22.10.11 clone 1

6. K568004+pBAD/araC on pSB4A5 Ligation 3 from 22.10.11 clone 2

Furthermore the Miniprep from the 19.10.11 of the ligation 15 red-light +GFP in pSB1C3 was sent as sample 7.

Digestion:

const-prom+lacZ

Glycerol Stocks

The following Glycerol Stocks were prepared:

const-prom+GFP on pSB1A2 in BL21 DE3 from Overnight culture 23 from 23-10-11

RBS on pSB1A2 in BL21 DE3 from Overnight culture 13 from 23-10-11

AND-Gate on pSB4A5 in JT2 from Overnight culture 7 from 23-10-11

Overnight cultures

The following overnight cultures were prepared:

Const-prom+GFP on pSB1C3 in DH5alpha

T7-GFP on pSB1C3 in JT2

T7-GFP on pSB1C3 in BL21 DE3

Red-light+GFP assay:


Red-light+GFP on pSB1C3 in JT2, 4 times, all incubated at 37°C; one in turn-off light, one in turn-on light, one in the light of the incubator, one in the dark

const-prom+GFP on pSB1A2 in JT2,4 times, all incubated at 37°C; one in turn-off light, one in turn-on light, one in the light of the incubator, one in the dark

RBS on pSB1A2 in JT2 4 times, all incubated at 37°C; one in turn-off light, one in turn-on light, one in the light of the incubator, one in the dark


Transformation of JT2 with AND-Gate and T7-Promoter+GFP 1) 1:3 = T7-Promoter + GFP : AND-Gate 2) 1:10 3) 1:20

plated on cam+amp plates


Testing

T7 GFP Reporter Assay:

The following samples were prepared for the T7 Promotor+GFP assay on 25-10-11:

const prom+GFP in BL21 DE3

RBs on pSB1A2 in BL21 DE3

T7 Prom+GFP on pSB1C3 in BL21 DE3 from plate


Blue light lacZ Miller Assay:

Three cultures have been inoculated into LB yesterday. The cultures to be tested are JT2 transformed with blue light promotor + lacZ, constitutive promotor + lacZ (positive control), or rbs (negative control), respectively. The Miller Assay was performed according to the protocol used on the 22-10-11. Starting from t = 0 min, the cells were cultured in darkness, under blue or ambient light.


Results

Blue light lacZ Miller Assay:


Miller Assay 111024 Blue light + lacZ

The tested strains were JT2 cells transformed with blue light promotor + lacZ (Blue), constitutive promotor + lacZ (+), or rbs (-). They were incubated at 37 °C under different conditions. The following table shows the data generated by the assay.

Miller Assay 111024 Blue light + lacZ Data

25-10-11

Cloning

Miniprep

1 pSB1C3-T7-Promotor+GFP out of BL21DE3; 6.5 ng/µl

2 pSB1C3-T7-Promotor+GFP; 15.0 ng/µg

3 pSB1A2-const. Prom.+GFP out of BL21DE3; 37.0 ng/µl

4 pSB1A2-RBS out of BL21DE3; 25.0 ng/µl

5 const. Prom. + GFP out of BL21DE3 clone 1; 20.5 ng/µl

6 const. Prom. + GFP out of BL21DE3 clone 2; 53.5 ng/µl

7 pSB1C3-const. Prom. + GFP -6- out of DH5alpha clone 2; 37.0 ng/µl

8 pSB1C3-const. Prom. + GFP -6- out of DH5alpha clone 1; 40.5 ng/µl

9 pSB1C3-T7-Promotor + GFP out of JT2 Clone 2; 71.5 ng/µl

10 pSB1C3-T7-Promotor + GFP out of JT2 Clone 1; 74.0 ng/µl

11 pSB1C3-AND-Gate (6b) -4- out of DH5alpha clone 1; 50.5 ng/µl

12 pSB1C3-AND-Gate (6b) -4- out of DH5alpha clone 2; 42.0 ng/µl


Analytical Digest

about 100 ng of the plasmid were digested with E and P and loaded on an agarose gel


251011 analyt


Testing

1. GFP Assay


three cultures media change to M63 in appropriate antibiotic

const prom+GFP in BL21 DE3

RBs on pSB1A2 in BL21 DE3

T7 Prom+GFP on pSB1C3 in BL21 DE3


four lighting conditions, OVER NIGHT under those conditions:

1. on-light

2. off-light

3. ambient light

4. dark

25.10.2011 GFP Assay over night under different lighting conditions Table.jpg

25.10.2011 GFP Assay over night under different lighting conditions Diagram.jpg

2. GFP Assay

three cultures media change to M63 in appropriate antibiotic

const prom+GFP in BL21 DE3

RBs on pSB1A2 in BL21 DE3

T7 Prom+GFP on pSB1C3 in BL21 DE3


four lighting conditions t=0 is start of those different conditions::

1. on-light

2. off-light

3. ambient light

4. dark

Sequencing

The Miniprep number was sent for sequencing to GATC.

AND-Gate Test The following samples were incubated over night at 37°C in the turn-off light for the test tomorrow:

AND-Gate on pSB4A5 in JT2 T7-GFP on pSB1C3 in JT2 const-prom+GFP in JT2 AND-Gate + T7GFP in JT2


GFP Assay 25.10.2011.jpg


Diagram GFP Assay 25.10.2011.jpg


26-10-11

Results

Result of overnight GFP reporter test

Table GFP reporter overnight 25.10.jpg

Diagram GFP reporter Assay


Result of AND gate + T7 + GFP test

26.10.2011 AND Gate Assay Table.jpg

for example: all on-light values

26.10.2011 AND Gate Assay on-light Diagram.jpg

and the single samples

26.10.2011 AND Gate Assay const.prom-pos.control Diagram.jpg

26.10.2011 AND Gate Assay T7+GFP-neg.control Diagram.jpg

26.10.2011 AND Gate Assay ANDgate-neg.control Diagram.jpg

26.10.2011 AND Gate Assay clone 1 Diagram.jpg


26.10.2011 AND Gate Assay clone 2 Diagram.jpg

26.10.2011 AND Gate Assay clone 3 Diagram.jpg

26.10.2011 AND Gate Assay clone 4 Diagram.jpg

26.10.2011 AND Gate Assay clone 5 Diagram.jpg

We think that the transformations from JT2 with the two constructs did not work. Further results will show the analytical digest on the next day.

Sequencing Results

1. const prom +lacZ on pSB1C3 Ligation 6 from 22.10.11 clone 1

Sequence shows our reverse RBS only.


2. Const prom +lacZ on pSB1C3 Ligation 7 from 22.10.11 clone 1

Sequence shows religated RBS+lacZ without constitutive promoter


3. K568004+pBAD/araC on pSB4A5 Ligation 1 from 22.10.11 clone 1

Sequence shows religated K568004 without pBAD/araC.


4. K568004+pBAD/araC on pSB4A5 Ligation 2 from 22.10.11 clone 1

Sequence shows reverse RBS only.


5. const prom +lacZ on pSB1C3 Ligation 5 from 22.10.11 clone 1

Sequence shows religated RBS+lacZ without constitutive promoter


6. K568004+pBAD/araC on pSB4A5 Ligation 3 from 22.10.11 clone 2

Sequence shows reverse RBS only.


7. Miniprep from the 19.10.11 of the ligation 15 red-light +GFP in pSB1C3

Sequence quality is rather bad due to low concentration of DNA. However GFP is present which indicates a correct clone.


--> There is a strong conatmination with our RBS plasmid (small, good transformation efficiency etc) present.


Sequencing of 25.10.11: Constprom gfp on pSB1C3-GATC-VF2-545457:

correct clone, constitutive promoter J23100 and RBS+GFP are present.

27-10-2011

Cloning

From the five picked clones, that were used in the assay with the AND-Gate (see 26.10.11) a mini prep was performed.

An analytical digest was done and the result is shown on the gel:

26.10.2011 AND Gate Assay clone 5 Diagram.jpg

As one can see the JT2s were transformed only with the T7-Promoter + GFP construct on pSB1C3, which explains the questionable assay results from 26.10.11

Transformation

Constprom+gfp on pSB1A2 ligation from the 14-10-11 was transformend into CP919.

AND-GATE on pSB4A5 + T7-GFP on pSB1C3 was transformed into JT2.

Assays

The following cultures were incubated under the following conditions:

turn-off light 37°C

turn-on light+ blue light 37°C

light of the incubator 37°C

Dark 37°C


const prom+GFP on pSB1A2 in JT2

AND-Gate on pSB1C3 and T7GFP on pSb1A6

CP919 without part


Sequencing

The ligation 3 from the 14-10-11 const. prom+lacZ on pSB1A2 is sent for sequencing to confirm the Miller Assay using the const prom+lacZ as positive control.

Other work

This parts were shipped today:

Shipping tabelle 27112011

The part K568007 was accidentally submitted on pSB1A2. K568007 on pSB1C3 is sent by mail today.

Results

Results of Miller Assay

Table results.jpg

The results of this Miller Assay were not very convincing.

The findings are as follows:


1. The controls worked as expected, RBS + lacZ yielded a high output of lacZ, pure RBS, our negative control, did not produce lacZ. However, we are surprised that the RBS + lacZ without a certain promoter yielded that much output.


Test of controls.jpg


2. The construct to be tested yielded lacZ output

3. Tracking lacZ expression over the course of 2 hours, it decreased in many samples. This was not expected as modeling predicted a very fast increase in output of the blue light promoter in a few seconds.

4. Analyzing the three constructs under the desired conditions for a presumed test, RBS +lacZ yielded the highest lacZ output at last three points of time. It is disputable, whether the three measurements (0, 10 and 30 min) at which the blue light promoter yielded a higher output are relevant.


Test of construct (RT, blue light).jpg


5. Analyzing the blue light promoter at room temperature (RT) and under three different light conditions, the sample incubated under blue light yielded the highest lacZ output.


Test of light conditions (RT, blue prom.).jpg

However, a similar pattern is found for the positive control, RBS + lacZ.


Test of light conditions (RT, RBS + lacZ).jpg


Further diagrams of this very complex assay:


Summary of Miller Assay- test of four different parameters.jpg

Test of construct (37 °C, blue light).jpg


Test of construct (RT, dark).jpg

Test of construct (37 °C, dark).jpg

Test of light condition (37 °C, blue prom.).jpg


Test of light conditions (37 °C, RBS + lacZ).jpg

Test of temperature (blue prom., blue light).jpg

Test of temperature (RBS + lacZ, blue light).jpg


Kompliziertes Diagramm bearb klein.jpg

Other work

This parts were shipped today:

Shipping tabelle 27112011.jpg

The part K568007 was accidentally submitted on pSB1A2. K568007 on pSB1C3 is sent by mail today.