August, 16th
Inoculum of T9002-ENTERO4C5 and ENTERO-RBS (1 ml of M9 + Cm12.5) to test again diluted supernatants of E37, E38, E39, E40 and ENTERO4C5.
Inoculum of E41N-1 and J101-4C5 for plasmid purification 6 ml of LB + Cm12.5.
Streak of E32, E33, J101-31, J101-E5 and ENTERO4C5 on an LB-agar plate + Cm12.5 to test and characterize PtetR promoter with different Ribosome Binding Sites (BBa_B0030, BBa_B0031).
August, 17th
E41N-1 and J101-4C5 plasmids were purified with mini Prep kit:
| Plasmid |
DNA (ng/μl) |
| E41N-1 |
33.7 |
| J101-4C5 |
25.4 |
T9002-ENTERO4C5 and ENTERO-RBS were diluted 1:500 in a final volume and 1 ml of 12 ml M9 + Cm12.5 respectively and grown for 6 hours.
3OC6-HSL was diluted to known concentrations in order to induce T9002-ENTERO4C5 biosensor and obtain a reference curve for the measurements on E37, E38, E39, E40 and ENTERO4C5 supernatants.
Supernatants were diluted in M9 + Amp + Cm12.5 in order to obtain 1:500 and 1:200 final dilutions in the 200 μl-well of TECAN microplate.
In the afternoon supernatants were tested; this time results were more precise, even if negative control seemed to inactivate 3OC6-HSL as fast as other cultures.
1.5 μl of J101-4C5 purified DNA was transformed in 100 μl of MGZ1 competent cells.
E32, E33, J101-31, J101-E5 and ENTERO4C5 plate was grown so two colonies for each strain were picked and inoculated in 1 ml of M9 + Cm12.5 for PtetR characterization.
BBa_K300005 was inoculated in 6 ml of LB + Cm34 in order to extract pSB1C3 standard shipping vector.
August, 18th
J101-4C5 plate was grown and a colony was picked and inoculated in 750 μl LB + Cm12.5; in the late afternoon 250 μl glycerol 80% were added in order to prepare a glycerol stock of this culture.
Cultures involved in PtetR characterization were diluted 1:500 in a final volume of 1 ml M9 + Cm12.5 and grown for 2.5 hours. Then they were induced with 10 different final concentrations of anhydrotetracycline (atc) (0 ng/ml, 1 ng/ml, 2 ng/ml, 3 ng/ml, 4 ng/ml, 5 ng/ml, 8 ng/ml, 10 ng/ml50 ng/ml and 100 ng/ml).
Plasmid purification was performed for
BBa_K300005:
Then the plasmid was digested with EcoRI and PstI endonucleases:
| Plasmid |
Kind |
DNA (μl) |
H2O (μl) |
Enzyme 1 (μl) |
Enzyme 2 (μl) |
Buffer H (μl) |
Final Volume (μl) |
| BBa_K300005 |
Vector |
4 |
16.5 |
1 EcoRl |
1 Pstl |
2.5 |
25 |
Gel electrophoresis was carried out:
Small size gel
After gel extraction, digested DNA was quantified:
Digested DNA was stored at -20°C, in order to ligate the parts to send to the Registry.
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