Team:Nevada/Notebook/Weeks912

Calender Weeks 9-12
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Week 9 - July 25th-31st

E. Coli

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Cyano
7/25/11: Chloramphenicol vector was digested with EcoRI and checked on 0.7% gel. The results for this gel were good. ThiE/Topo Vector was digest with EcoRI and PstI and checked on a 0.7% gel. The gel was not very clean, so we will re-run tomorrow (7/26). The PetBD and GLF PCR was done at 63.5C. Positive control/primer controls were added to the PCR reaction. After confirmation of ThiE it will be put into plasmid PSB1C3 and sequenced. 7/26/11: Gels for PCR products of PetBD and GLF were run with no results. We believe this is due to errors in the master mix. ThiE digest was re-run on a 0.7% gel. The gel showed that the ThiE was not digested. (7/27). Ran PCR reaction on ThiE gel purification 7/18/11 with positive control and primer control at 54.3C for Topo Cloning tomorrow (7/27). 7/27/11: Ran gel on + control, Primer control and ThiE to be used for Topo cloning. Gel was completely empty aside from ladders. Did digest on ThiE in Topo Vector with ecoRI. Results showed that we have an empty topo Vector on all three digests (#'s 2, 3 and 5).

Enzymology
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Week 6 - July 4th-10th

E. Coli

Pyruvate Decarboxylase & Alcohol Dehydrogenase

PDC/ADH was re-digested with XbaI/PstI and run on a 1% agarose gel to confirm digestion. Bands obtained confirmed PDC/ADH (3054bp), and pSB1C3 (2070bp). PDC/ADH-XbaI/PstI and σ70/pSB1A3-SpeI/PstI were re-ligated and transformed into NEB10 β cells.

Cyano
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Enzymology
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Week 7 - July 11th-17th

E. Coli

Pyruvate Decarboxylase & Alcohol Dehydrogenase

Single colonies from LB-Amp plates were selected and tested on LB-Amp and LB-Chlor plates. Liquid cultures grown in LB-Amp and minipreps and nanodrop analysis performed.

To verify presence of PDC/ADH genes with the σ70 constitutive promoter, 0.5ug of PDC/ADH/σ70/pSB1A3 was digested with EcoRI and PstI. Digests were run on a 1% agarose gel, and bands confirmed σ70/PDC/ADH (3089bp) and pSB1A3 (2155bp).

Cyano
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Week 8 - July 18th-24th

E. Coli
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Cyano
7/17/11 – PCR temp gradient was created for ThiE solution, used New England Biolabs phusion high-fidelity DNA polymerase protocol. Temp gradient ranges from 72-50 degrees Celsius. Controls of only DNA and only Primer were run with the samples. 10 ul samples were run for each temp gradient
7/18/11 - PCR results were run through a 1% agarose gel. Best results came from ‘F’ which ran at 54.3 Celsius. The DNA from this band was extracted and purified using QIAGEN Gel Extraction Kit
7/19/11 – PCR 50 ul of ThiE at 54.3 Celsius for backup stock. TOPO cloned ThiE that was extracted from gel yesterday. Plated TOPO cells at 100 ul, 75 ul, 50 ul and 25 ul concentrations then placed in incubator overnight
PCR reactions only need one control, of just the primers without DNA.
7/20/11 – 5 colonies of TOPO bacteria grew overnight. Cultured all 5 for purification and confirmation of proper insert (ThiE) Ran gel to confirm that 50 ul ThiE PCR worked, nice clean band at 1 kb marker, saved the rest of the 50 ul stock in -20 C freezer for further use. PCR done on the additional pieces (CmR, PetBD and GLF) used same temp gradient as done with ThiE. Will run a gel of these tomorrow to see what optimal temp is for each sample. If clean bands are seen, we will perform a gel purification and re-PCR those samples. Spoke with Shintani, these additional pieces should just be amplified through PCR until a clean stock is created, then this stock will be used in Gibson.
7/21/11 – Miniprep purified TOPO cultures. Sample “1” did not bloom in culture but grew on stock plate. Purified “2-5” and will save “1” as a backup if no other colonies have the correct insert. Ran temp gradient samples through gels.
GLF had very light bands at 67.6 and 63.5 Celsius temps, the average temp of those two is 65.5 – will try to run more DNA at this temp to see if we can get stronger bands. Maybe increase DNA concentration in solution.
*Shintani gave me his master stock solution of GLF (in puc vector) for next run of PCR. Diluted 1:9 of his solution and stored in freezer in PCR tube (with orange label) will try to PCR this stock at 65.5.
PetBD worked really well at several temps but 63.5 Celsius appears to be the best temp, strong band that was very clean. This worked out so well I might try just running a 50 ul solution at this temp and saving it as backup stock. Confirm the same clean band with a 5 ul run of solution through gel.
CmR did not work at all  I was told K56 was the integration vector sent from Utah State but was unable to confirm that in any of my team’s notebooks. Will double check with David today and see if he has that same number in his note book. If it is correct, maybe need to play with DNA concentration and temps again.
*E. coli group has extra CmR, will ask Megan to bring over some of this stock (pSB1C3 – iGEM vector) for next PCR. Shintani thinks that maybe vials were switched in the beginning (KmR PCR also not working) or something went wrong during purification.
With better stock will run temp gradient PCR on CmR again.
7/22/11: Gel for GLF at 65.5C yielded no bands. Ran PCR of GLF at 63.5C. Faint bands, attempted gel purification, will run confirmation gel on Monday. Ran PCR for PETBD (50ul), which also yielded no bands. Will run another gel for a shorter time period on Monday. Will discuss options/next steps on Monday with the group.

Enzymology
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