Team:Cornell/notebook

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Speed-taboodunit is a mashup of speed-dating, taboo, and whodunit; the idea is that each person writes on a piece of paper something unusual about themselves, underlining the key words, then these pieces of paper are randomly redistributed. Everyone organizes in a speed-dating format, with two lines of people, and you have a minute to talk to them and try to find out if they're the person described on their piece of paper-- with the catch that they can't use any of the underlined words. People who successfully find their person leave the group, but otherwise after the minute everyone moves down the line. As for why we came up with this specific icebreaker, we wanted to hit two key requirements of icebreakers: they have to be fun, and they have to make specific accommodations for being shy or quiet. Because each person has the specific objective of finding their person, this helps them overcome the shyness, and as for the fun, everyone loves taboo!

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A lot of iGEM teams we've looked at don't have much beyond the biology, so we really try hard to do interdisciplinary projects, as they provide a great opportunity for learning to work with different kinds of people.

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We transformed parts containing carotenoid pathway genes crtE, crtI, crtB, and crtY (BBa_K523022, BBa_K539119, BBa_K145001), as well as the T7 promoter (both in pIVEX2.3d as well as BBa_I712074), the T7 polymerase gene (BBa_K145001), and the transformation efficiency kit part (BBa_J04450).

From the plasmid pUCATPH (pAh13G), we amplified the trpC promoter (PtrpC, a constitutive fungal promoter) and the trpC terminator (TtrpC). From pNG (pAg13H), we amplified nptII, the geneticin (a plant/fungal antibiotic) resistance gene.

We miniprepped the crtEIB (BBa_K523022), crtY (BBa_K539119), and T7 (BBa_I712074) biobricks. The gels confirmed our PCRs for PtrpC, TtrpC, and nptII, which we then digested to insert into pSB1C3.

PtrpC, TtrpC, and nptII were column-purified, digested pSB1C3 backbone was gel-purified and dephosphorylated, and each was ligated into the pSB1C3 backbone.

We transformed TtrpC (pC13Q), PtrpC (pC13P), and nptII (pCg13R) constructs into DH5α via electroporation.

We used Q5 PCRs with the standard biobrick primers VF2 and VR to attempt to confirm the presence of TtrpC (pC13Q), PtrpC (pC13P), and nptII (pCg13R).

Minipreps of TtrpC (pC13Q), PtrpC (pC13P), and nptII (pCg13R) were performed with an EZNA kit, and afterwards we quantified with a nanodrop.

The Q5 PCRs of TtrpC (pC13Q), PtrpC (pC13P), and nptII (pCg13R) showed bands of the correct size, so sequencing with VF2 and VR was submitted to make sure nothing strange had happened.

pC13B (crtY) was digested with XbaI and PstI, and pAK13D (T7 promoter) with SpeI and PstI (standard RFC 10 cloning). However, the gel showed only one band for each (what one would expect for pAK13D, but pC13B should have had two bands).

pC13B (crtY) was digested with XbaI and PstI, and pAK13D (T7 promoter) with SpeI and PstI (standard RFC 10 cloning). The gel this time had two bands at the correct locations for pC13B, so we're hoping it's a success this time. We also started overnight LB cultures of pAb13T (pBARGPE1).

If successful, the ligation will form pAK13AD. pC13K (crtI, BBa_K118003) and pC13M (crtB, BBa_K118002) were digested with XbaI and PstI for insertion into pAK13D, and separated on a gel. pAb13T (pBARGPE1) was miniprepped and quantified by nanodrop.

pC13K (crtI, BBa_K118003) and pC13M (crtB, BBa_K118002) were digested with XbaI and PstI, pAK13D with SpeI and PstI, pC13Q (TtrpC) with EcoRI and XbaI, and pCg13R (nptII) with EcoRI and SpeI, and all were separated on a gel; crtI looked faint, and pAK13D was smeared, but all fragments were cut out for purification tomorrow.

Digested pAK13D was dephosphorylated, then crtI , crtB, and crtY were ligated with pAK13D to put them under the T7 promoter, hopefully producing pAK13AB, pAK13AC, and pAK13AD, respectively. pCg13R was also ligated with pC13Q, hopefully producing pCg13U. All four constructs were transformed into DH5α via electroporation.

hph was amplified with Gibson primers from pAh13G, and the pSB1C3 backbone was amplified with Gibson primers from pC13F (BBa_J04450). When assembled, they will form pCh13V.

:( ;_; T_T D: (tears for the transformations lost). The bar PCR and pC13F were digested with EcoRI and PstI, and ligated to hopefully form pCp13X. Site-directed mutagenesis was performed both with and without DpnI to digest template DNA. <add something about site-directed mutagenesis design; refer to primers? probably requires Swatinput>

Minipreps were made from the crtY plates, from which a digest screen was prepared using Not-I to see if the ligation worked. The digestions were run on a gel and some appear to have worked (X/P/S, X/P/A #2/3, and X/P/S/A #⅔ worked). Also, a glycerol stock of nptII BB was made and miniprepped, but the concentration was extremely low, so an overnight culture was made from the glycerol stock to be miniprepped tomorrow. Another transformation was done using the remaining miniprep of nptII BB from earlier. Cultures were made for Gibson #3, and a colony PCR perfomed, then run on a gel. Non-GC fragments from Gibson #3 were too small, but GC #⅖ were good (1kb fragment), and #4 had a band at 1kb with another smaller fragment. Finally, nptII BB was digested with X/P then column purified, and PtrpC was digested with S/P then gel purified.

Today nptII BB and PtrpC were quantified. Also, nptII BB transformants were miniprepped, and another glycerol stock of nptII BB was made. The DNA for Gibson Assembly was miniprepped, and GC colonies 2,4, and 5 from the Gibson #3 gel yesterday were prepared for sequencing. NptII BB was digested with the PtrpC digest from yesterday. More cultures of X/P/S #1/2/3, X/P/A #⅔, and X/P/S/A #⅔ were made. CYM medium was created, and PC13Z was transformed from a kit plate.

pCg13Y was desalted, transformed, then plated into E. coli. Antibiotic stocks G418 and PPT were made (100x). G. lucidum cultures were inoculated with varying levels of antibiotic to test the strain's sensitivity for future selection purposes.

Colony PCRs and cultures of pCg13Y were completed to determine the success of cloning nptII BB downstream of PtrpC. Unfortunately, a gel revealed that the dna fragments appeared at 0.6kb instead of 1.4kb. pC13Z and pAK13AD were miniprepped, but had to be thrown out due to contamination of our EB. New cultures were made to be miniprepped again. A glycerol stock of PC13Z was made, too.

Due to the contaminated EB found yesterday, our EB supplies were checked to ensure no further delays. Gibson hph was submitted for sequencing, and pAK13ADs and pC13Z(GFP) were miniprepped. PC13Z, PC13F, PCP13X, PC13M, and PC13E were PCRed with primers 31 and 32, the standard pSB1C3 primers. A gel was run to check the PCRs-all looked successful except pC13M and pC13E which had nonspecific bands around 1kb. A new technique was used in the following digests, which used a restriction cocktail of enzymes to cut the dna. PAK13AD was digested with E/S/SacI/ClaI so that it could be placed in PSB1C3 using SpeI instead of PstI due to the small distance between the PstI and the SacI cut sites. PC13F was digested with E/S/KpnI so PAK13AD can be placed in it. PAK13D was digested with S/P so crtI/crtB can be placed in it. All the digests were then column purified rather than gel purified--a move which has improved our ligation efficiencies. Then the purifications were quantified. Cultures were made for PC13P and PC13K. Finally, PAK13AD was dephosphorylated then ligated into PC13F (PC13AH).

Sequencing results came back positive for the Gibson cloning of hph, so a culture of gibson colony 5 was made. PC13AH was transformed and plated, and pC13K and pC13K were miniprepped. pCp13X (S/P), PC13F (S/P), PC13Z (S/P) were purified and digested along with PC13P (X/P) [also dephosphorylated], then all were column purified. Reran a PCR of PC13M and PC13E, and one of PC13K with primers 31/32. All PCRs were cleaned, then run on a gel along with PBARGPE1 and PBARGPE1 which had been digested with NotI today. Results: PC13E had a 3kb fragment (good), PC13K had a .9kb fragment (should be 1.7-1.8kb), PC13M had a 1.2-1.5kb fragment (good), pBARGPE1 had a 4kb fragment (super-coiled) and pBARGPE1 with NotI had a 5-6kb fragment (has a NotI site-good). From these results it can be concluded that everything worked except PC13K. Ligations of PAK13D to inserts PC13Z, pCp13X, and PC13F along with vector PC13P to inserts PC13Z, pCp13X, and PC13F were performed. Also, overnight digestions of PC13M, PC13E, and PC13K with X/P were set up. Transformation was attempted for PC13AI and PA13AJ, but the cuvettes weren't cleaned properly so it failed. Finally, our dwindling supplies prompted the ordering of more Spe1 and membrane filters.

All 18 (yes, 18!) of the pC13AH colonies that had been screened by colony PCR yesterday were miniprepped. We digested the miniprepped colonies of pC13AH clones (T7 promoter with crtY in pSB1C3) with NotI to see if the restriction cocktail method of cloning worked. On the gel that was subsequently run, bands were expected at ~2.1 for pSB1C3 and ~1.2 for crtY+pT7. The restriction cocktail method worked! The bands appeared at the correct lengths on the gel for pC13AH. There was not enough miniprepped DNA for pC13AH to send for sequencing, so the colonies were cultured again for another miniprep. None of the ligations into pAK13D (pSB1AK8 + PT7) worked -- pC13Z (GFP), pC13M (crtB), and pCp13X (bar) all failed => try cloning only using restriction cocktail method, instead of attempting PCR with VF2 & VR. Digested pC13Z, pC13M, pCp13X, pC13K (crtI) with XbaI and PstI in addition to ApaLI and SacI for later ligation with pAK13. pAK13D had been previously digested with SpeI and PstI, column purified, and dephosphorylated for insert ligation. More pAK13D was grown to acquire more DNA to be miniprepped tomorrow. Nupur performed colony PCR and made cultures of transformants from yesterday. All transformations appeared to have very low efficiency--perhaps an issue with heat shock stocks? Transformations of AI-AL (mRFP cds and lox site parts) all yielded colonies, though at really low efficiencies compared to most transformations off of kit plates. These were screened by colony PCR to verify. Ligations into pC13P all yielded colonies, but at very low efficiencies. These were pC13E (T7 pol), pCp13X (bar), and pC13Z. All were screened by colony PCR as well. Taq was used to perform 5 colony PCRs, then all colony PCRs were run on a gel. Also, pCg13s (nptIIBB)was digested with XbaI, PstI, ApaLI, and SacI for later ligation to pC13P, which had been previously digested with SpeI and PstI, column purified, and dephosphorylated. Overnight ligations of pC13Z, pC13M, pCp13X, pC13K, pCg13S with vector pAK13D were set up, along with overnight ligations of pC13K and pCg13S in vector pC13P.

Two gels, each with 20 wells, were run simultaneously for fluorescence. The DNA samples loaded were from a Q5 PCR on pC13BQ with pC13AT, pC13BQ with pC13AU, pC13BR with pC13AU, pC13BR with pC13AT, and pAK13AO with pC13F. pC13BV was transformed into electrocompetent BL21 E. coli. A culture of G. lucidum was diluted and homogenized, and 150 μL aliquots were spread on plates and let dry. Paper discs were soaked in 100X solutions of Geniticin, Hygromycin, Ampicillin, Kanamycin, and Chloramphenicol and placed in the center of each plate. We miniprepped ‘’holin’’ 8 & 9. The results from the growth assay do not look good. However, we found that the T7 polymerase in BL21 is controlled with an IPTG inducible promoter, so more pC13BA was grown with IPTG and plates were all re-inoculated with the corresponding amounts. An appropriate volume of LB was also added to some plates to account for mass changes. The zone of inhibition tests were also restarted with recultured (with IPTG) pC13BA. The pC13BN transformations yielded no colonies.

We miniprepped the pC13AI cultures. We amplified with primers 45-52 and primers 48-51 and ran a gel (expected size at 1.5kb). Nothing appeared on the gel, not even the ladder. The EtBr needs to be replaced. There were too many transformants for pC13BV in the BL21 strain, so those cells were restreaked onto a new plate. Additionally, we transformed pC13BC into BL21 as well, and characterize that part as well.

The sequencing of pC13CO came back as ‘’PtrpC’’ + ‘’GFP’’. We are not sure why or how. We either miniprepped the wrong thing or put the wrong thing into sequencing. We continued to take measurements for growth assays. We put a lot of Aspergillus around the inoculating discs for gathering more data. We set up cultures of BL21, with no plasmid and with pC13BC and pC13BV, and then standardized the optical densities of the cells between the three cultures. We spread 50 μL aliquots onto LB, adding discs dipped in 10X, 1X, and 0X concentrations of geneticin and hygromycin.

There was a clear zone of inhibition around the discs dipped in 10X hygromycin, no inhibition around the discs dipped in sterile water, for the wild type BL21 E. coli. However, there was normal growth around the 10X hygromycin discs for the BL21 E. coli transformed with our pC13BV construct. For the geneticin tests, the antibiotic appeared relatively ineffective, possibly due to degradation, and that experiment will need to be repeated.