Team:Johns Hopkins/Notebook/Vio

(Difference between revisions)

Violacein loxPsym Integration

6/11/2011

Verify that the promoters and 3'UTRs are present in the plasmid library made by Yuxuan. The inserts are ligated into pCR 2.1-TOPO and contain BsaI sites, so following digestion with BsaI they should be visible on a gel.

Note: Due to a lack of good sequences the promoters and 3'UTRs for RPL8A, FCY2, and KRE9 were not available.

Minipreps were prepared by Ashan.

20µl digest

Component	Volume (µl)
Plasmid DNA	5
10x NEBuffer 4	2
H2O	12.5
BsaI (10U/l)	.5
Total	20

~2.5 hour incubation @ 50°C.

The 3'UTRs were expected to be small (most ~142bp), so they were run on a 2% MetaPhor agarose gel.

Results:

None of the expected bands were observed. The bands at ~1kb are pieces of the vector (pCR2.1-TOPO), which contains a BsaI site in its sequence.

6/12/2011

Gel electrophoresis of promoters from 6/11 restriction digest to verify presence in provided plasmids.

Results:

Some bands are visible around 500bp, but they are not consistent with the expected size of the promoters. The ladder is also very weak.

6/20/2011

The 6/11 digest was run with BsaI at 50°C based on Dr. Boeke's NEB book, but the NEB website recommends 37°C. I will run a digest on lambda DNA provided by Dr. Boeke to test which temperature yields better results.

Was given 10µl of DNA, 1µg/µl. Made two master mixes in order to make a titration of BsaI, enough for 7 digests each.

Reaction Mix 1	x7	Master Mix 1		Reaction Mix 2	x7	Master Mix 2
.67µl DNA		4.67µl DNA		.67µl DNA		4.67µl DNA
17.13µl H2O		119.91µl H2O		17.33µl H2O		121.31µl H2O
2µl 10x B4		14µl 10x B4		2µl 10x B4		14µl 10x B4
.2µl BsaI		1.4µl BsaI
20µl total, 3 units Bsa1/DNA		140µl total		20µl total, 0 units BsaI/DNA		140µl total

Titration
3x	2x	1x	1/3x	0x (-control)
60µl MM1	40µl MM1	20µl MM1	6.67µl MM1
	20µl MM2	40µl MM2	53.33µl MM2	60µl MM2

The master mixes and titration were prepared on ice. 20µl of each reaction mix was distributed into 2 groups of 5 microcentrifuge tubes. One group was transferred to a 37°C incubator, the other to a 50°C heat block. Both digests were run for two hours.

Digestion at 50°C yielded slightly clearer bands. This means that the promoter/UTR digestion was performed at the correct temperature, and the digestion temperature does not explain the unexpected results. Additionally, it seems that the 2-log ladder with CS red that we had been using (the leftmost column) is showing up very faintly, so we will stop using it.

6/22/2011

The unexpected digestion patterns might be explained if the plate with the plasmids sent out for sequencing was flipped. I will do colony PCR on the sequencing plates to test this hypothesis. If this fails, I will PCR the promoters and UTRs from genomic DNA.

I chose 6 promoters of varying sizes to test. The promoters are generally larger than the UTRs so they should be more visible on a gel.

Label	Promoter	Length (bp)	position	flipped position	Label	Fragment	Length (bp)
1	THD3	534	A2	H11	1F	BAP2utr	542
2	RPL24A	664	A9	H4	2F	HHO1utr	354
3	RPS8B	834	B7	G5	3F	KRE9utr w/mutation	263
4	STM1	534	D7	E6	4F	FCY2utr w/mutation	142
5	ARD1	535	F5	E9	5F	RPS2utr	142
6	BAP2	834	H5	F9	6F	TDH3utr	142

The E. coli containing these plasmids were streaked out on LB and incubated at 37°C, along with the strains containing STM1, ARD1, and BAP2 the original restriction digests were performed on.

6/24/2011

The bacteria were left in the incubator for two days, but I decided to proceed since the PCR did not need to select for single colonies.

Followed this protocol. Substituted bacteria, and changed the volume of primer to .01µl since the primers provided I were what I thought was 5mM versus the 20µM in the protocol.

Did four reactions for each promoter, flipped sequence, and original sequence.

No bands were observed. Too many cells may have been added to the reaction, inhibiting the PCR. Also, the primers were 5µM rather than the 5mM written on the plate, so not enough primer was used.

6/27/2011

The 6/24 colony PCR failed, so I will repeat the PCR, adding fewer cells to the reaction, using the correct concentration of primer, and extending the initial denaturation step.

Followed same protocol as 6/24, trying not to pick too many cells, using .15µl of the 5µM primer mix, and extending the initial denaturation to 10 minutes. PCR product was stored @ 4°C.

6/30/2011

Ran the 6/27 PCR product.

No bands observed. It was probably a bad idea modifying a yeast protocol for bacteria, will use a more suitable protocol and try again.

7/1/2011

Still trying to get a colony PCR to work in order to verify the promoters and UTRs are present, this time with a different protocol. Tested 6 promoters and their corresponding 'flipped' positions on the sequencing place in order to test the hypothesis that the sequencing plate was flipped.

Followed Marty's protocol for colony PCR using GoTaq Green.

Still nothing observed besides primers.

7/5/2011

One more attempt at the colony PCR. Same as 7/1 procedure.

Same pattern of only primers/primer dimers/partial products observed 7/1. Move to PCR the promoters and 3'UTRs from genomic DNA instead.

7/7/2011

Test whether the gDNA PCR will work, using a small set of the promoters and 3'UTRs.

Received two sets of wild-type genomic DNA from Zheng, one fully processed and one semi-processed, along with a positive control primer pair (12336/9613) and a negative control primer pair (12310/9613). Because the control primers were 20µM and the promoter/UTR primers were 5µM, made two reaction mixes.

Promoter/UTR gDNA PCR Reaction Mix

Component	Volume
gDNA	2 µl
10x ExTaq buffer	2 µl
dNTP mix (2.5mM ea.)	1 µl
F/R Primer mix (5µM)	3.2 µl
ExTaq	.1 µl
dH2O	11.7 µl
Total	20 µl

Control Reaction Mix

Component	Volume
gDNA	2 µl
10x ExTaq buffer	2 µl
dNTP mix (2.5mM ea.)	1 µl
F primer (20µM)	.4 µl
R primer (20µM)	.4 µl
ExTaq	.1 µl
dH2O	14.1 µl
Total	20 µl

PCR Program: 5 min @ 94°C, 30x(30s @ 94°C, 30s @ 55°C, 30s @ 72°C), 5 min @ 72°C, hold @ 4°C

All the bands showed up as expected with the fully processed gDNA.

7/8/2011

Should have nanodropped the gDNA to see how much to put in 7/7 reaction, so did that.

gDNA: 63.2 ng/µl

7/12/2011

PCR out all of the promoters/3'UTRs w/BsaI compatible primers for later ligation with ORFs and loxPsym site.

50µl reaction volume and Herculase polymerase. Got two positive primers from Zheng (ZK096/097, ZK098/099).

Promoter/UTR gDNA PCR Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (63ng/µl)	2 µl
F/R Primer mix (5µM)	5 µl
Herculase Polymerase	.5 µl
dH2O	27.5 µl
Total	50 µl

Control Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (63ng/µl)	2 µl
F Primer (20µM)	.625 µl
R Primer (20µM)	.625 µl
Herculase Polymerase	.5 µl
dH2O	31.25 µl
Total	50 µl

PCR Program: 2 min @ 95°C, 30x(20s @ 95°C, 20s @ 56°C, 30s @72°C), 3 min @ 72°C, hold at 4°C.

Took 10µl for gel to check for product.

Will PCR purify.

7/13/2011

PCR purification of 7/12 PCR product using Qiagen kit. Ran 10µl to check products.

7/15/2011

Based on the 7/13 PCR purification, I need to gel extract, because there is lots of junk at around 100bp for many of the reactions. I will do a new PCR with reduced primer concentration.

Got gDNA from Patrick, 138ng/µl. 50µl reaction using Herculase.

Promoter/UTR Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (138ng/µl)	1 µl
F/R Primer mix (5µM)	1 µl
Herculase Polymerase	.5 µl
dH2O	32.5 µl
Total	50 µl

Control Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (63ng/µl)	1 µl
F Primer (20µM)	.125 µl
R Primer (20µM)	.125 µl
Herculase Polymerase	.5 µl
dH2O	33.25 µl
Total	50 µl

PCR Program: 2 min @ 95°C, 30x(20s @ 95°C, 20s @ 56°C, 30s @72°C), 3 min @ 72°C, hold at 4°C.

Not enough DNA for extraction, will adjust primer concentration again.

7/18/2011

Promoter/UTR gDNA PCR attempt 3, now with an intermediate primer concentration.

Procedure:

Promoter/UTR Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (138ng/µl)	1 µl
F/R Primer mix (5µM)	2.5 µl
Herculase Polymerase	.5 µl
dH2O	31 µl
Total	50 µl

Control Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (63ng/µl)	1 µl
F Primer (20µM)	.3125 µl
R Primer (20µM)	.3125 µl
Herculase Polymerase	.5 µl
dH2O	32.875 µl
Total	50 µl

PCR Program: 2 min @ 95°C, 30x(20s @ 95°C, 20s @ 56°C, 30s @72°C), 3 min @ 72°C, hold at 4°C.

7/19/2011

Purified DNA from 7/18 gel extraction according to gel extraction protocol, then nanodropped to find concentration. Used Invitrogen spin columns I found in the columns box.

Sequence	Concentration (ng/µl)	Sequence	Concentration (ng/µl)
TDH3p	31.6	FCY2p	31.7
TDH3utr	13.7	FCY2utr	22.9
RPL24Ap	37.9	PRY1p	4.6
RPL24Autr	12.6	PRY1utr	21.9
RPS8Bp	22.2	ARD1p	3.0
RPS8Butr	5.1	ARD1utr	9.7
RPS2p	2.9	KRE9p	42.1
RPS2utr	3.7	KRE9utr	41.0
RPL8Ap	3.0	HHO1p	49.4
RPL8Autr	18.6	HHO1utr	14.6
STM1p	31.5	BAP2p	9.3
STM1utr	17.9	BAP2utr	27.9

7/21/2011

Loaded 5µl of product on a 1% gel to verify 7/19 gel purification products.

7/25/11

Colony purified ß-carotene yeast strains in preparation for gDNA PCR experiment investigating white/super orange colonies. Inoculated YPD and dough media plates w/Rob for ß-carotene assay. Prepared WT gDNA for Dan W.

7/26/11

Try to PCR missing promoter and 3'UTRs from gDNA using adjusted annealing temperature.

Promoter/UTR Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (138ng/µl)	1 µl
F/R Primer mix (5µM)	5 µl
Herculase Polymerase	.5 µl
dH2O	28.5 µl
Total	50 µl

Control Reaction Mix

Component	Volume
5x Herc. buffer	10 µl
dNTP mix (2.5mM ea.)	5 µl
gDNA (63ng/µl)	1 µl
F Primer (20µM)	.625 µl
R Primer (20µM)	.625 µl
Herculase Polymerase	.5 µl
dH2O	32.25 µl
Total	50 µl

PCR Program: 4 min @ 95°C, 30x(30s @ 95°C, 30s @ 58°C, 30s @72°C), 7 min @ 72°C, hold at 4°C.

Also ran 3 timepoints of ß-carotene assay w/Rob.

7/27/2011

Gel extraction of 7/26 PCR products. Cut gels and took mass for purification, stored in 4°C overnight.

7/28/2011

Finish purification of 7/26 PCR product according to gel extraction with microcentrifuge, ran 5µl on gel to check.

Sequence	Concentration (ng/µl)		Sequence	Concentration (ng/µl)
TDH3p	38.8		FCY2p	41.8
TDH3utr	21.3		FCY2utr	26.1
RPL24Ap	53.1		PRY1p	14.9
RPL24Autr	26.4		PRY1utr	41.2
RPS8Bp	40.9		ARD1p	4.4
RPS8Butr	9.7		ARD1utr	21.1
RPS2p	3.4		KRE9p	66.3
RPS2utr	16.5		KRE9utr	54.3
RPL8Ap	3.2		HHO1p	48.5
RPL8Autr	21.8		HHO1utr	15.2
STM1p	43.0		BAP2p	8.4
STM1utr	31.3		BAP2utr	34.3

7/29/2011

Linearize vector pTZ19u w/SmaI in order to blunt-end ligate the BsaI containing fragments in for cloning and attaching URA3 to UTRs.

20µl digest

Component	Volume (µl)
ptz19u (60ng/µl)	20
NEBuffer 4 (10x)	5
BSA (100x)	.5
SmaI	1
H2O	23.5
Total	50

Left to digest overnight at room temperature (~23°C), rather than suggested temperature 25°C.

7/30/2011

Heat-killed SmaI (20 min @ 65°C).

Diluted pTZ19u 10x to 156.4 ng/µl (50µl total).

Ran gel of digested and undigested pTZ19u.

SmaI digest looks good; will go ahead with ligation.

Ligation Mix (20µl)

Component	Volume
10x T4 Buffer	2µl
SmaI linearized pTZ19u (58ng/µl)	1µl
T4 ligase (120,000 U/ml)	1µl
insert	6:1 molar ratio insert:vector
H2O	to 20µl

Left in 16°C overnight.

8/1/2011

Streaked out TOP10 e. coli on LB+carb for making competent cells.

8/2/2011

The TOP10 plates were accidentally placed in 30°C incubator instead of 37°C incubator overnight, there was no growth at all. Also I think you have to streak out on plain LB or the carb will kill the cells as they come out of -80°C.

Streaked out two new plates of TOP10 cells, one on LB, one on LB+carb, put in 37°C incubator along with the 8/1 plate.

Came back in evening, some growth on LB only plate, but no colonies for inoculation yet, so will have to delay one day.

8/3/2011

Inoculated 25ml LB with TOP10 E. coli, put in 37°C w/shaking.

Made gDNA from orange yeasts according to this protocol upload and link to protocol here. Accidentally forgot to spin and discard supernatant before adding glass beads, so spun 5 min @ 14000 rpm after adding beads and then discarded supernatant. Got pretty low concentrations:

Strain	gDNA concentration (ng/µl)
039	54.6
179	85.9
201	85.1
128	33.4
128 Super Orange	81.1
128 White	63.1

8/4/2011

Prepared competent cells according to competent E. coli preparation protocol.

There were no LB Carb plates for transformations of the 7/30 ligation, so spread 90µl of an X-Gal/IPTG/Carb mix on plain LB plates.

Component	Volume (µl)
X-Gal (1000x)	25
100mM IPTG	40
Carbenicillin (1000x)	25
Total	90

Followed Top10 transformation protocol for all promoters and UTRs except for RPS2utr (from 7/30 ligation). Spread one set of 50µl cells/ 35µl LB and one set of 200µl cells/ 85µl LB. Placed in 37°C overnight.

8/5/2011

Blue/white colonies observed for both 50µl and 200µl plates, but were very small, so incubated further. Spread 25µl 1000x Carbenicillin on plain LB plates to streak out colonies. Picked one white colony for each promoter/UTR and restreaked; put in 37°C incubator. Blue/white plates moved to iGEM 4°C space.

8/6/2011

Inoculated promoter/UTR E. coli into 5ml LB. Moved 8/5 plates to iGEM 4°C space.

8/8/2011

All overnight cultures looked ok except for PRY1p, which was yellowish. Perhaps contamination?

Miniprepped all promoter/UTR overnights according to protocol.

Performed restriction digest with BsaI. If the ligation/transformation was successful, the promoter/UTR should be cut out of the vector.

Made 15% glycerol stocks of E. coli w/correct fragments present, put in iGEM -80°C space.

8/9/2011

PCR of URA3 to get product and add NotI site to add to 3' UTR.

Diluted ura3_fwd and ura3_rev primers to 10µM (50µl 60µM primer, 250µl TE). 50µl reaction using Herculase II Polymerase.

Component	Volume (µl)
5x Herculase Buffer	10
dNTP mix (2.5mM ea.)	5
gDNA (148.8ng/µl)	.67 (100ng), 1.34 (200ng), 2.01 (300ng)
forward primer (10µM)	1.25
reverse primer (10µM)	1.25
dH2O	to 50
Total	50

Control primers were 20µM (ZK096/097), used .625µl ea.

PCR Program: 2 min @ 95°C, 30x (20s @95°C, 20s @64°C, 34s @72°C), 3 min @ 72°C

Ran gel under long wave in preparation for extraction, only saw faint product for 300ng band, decided not enough DNA to cut.

8/10/2011

Looking at 8/8 gels, need to redo ligation and transformation for TDH3utr, RPS8Butr, RPS2utr, RPL8Ap, RPL8Autr, STM1utr, FCY2utr, PRY1p, PRY1utr, ARD1utr, KRE9utr, HH01p, HH01utr, BAP2utr.

Linearized pTZ19u w/SmaI.

50µl reaction

Component	Volume (µl)
pTZ19U (156.4 ng/µl)	7.67
10x NEBuffer 4	5
BSA (100x)	.5
SmaI (20U/µl)	1
dH2O	35.83
Total	50

2 hour digest, heat kill SmaI 65°C 20 min.

20µl ligation mix

Component	Volume (µl)
10x T4 buffer	2
T4 ligase (Enzymatics: 120U/µl)	1
linearized pTZ19u (58ng/µl)	1
insert	6x molar ratio insert/vector
dH2O	to 20
Total	20

Moved to 25°C for overnight.

Redid URA3 PCR. Trying primers suspended in H₂O as well as in TE, and lowering the annealing temperature to 61°C vs 64°C.

Both primer sets yielded a good product this time. Gel extracted using Qiagen protocol with microcentrifuge.

8/11/2011

Heat killed ligase 65°C 20 min.

Discovered that TOP10 cells do not require IPTG for blue/white screen. Spread 25µl 1000x X-Gal/ 175µl H₂O onto LB-carb plates, put in 37°C for 1 hour. Followed TOP10 transformation protocol (heat shock), spread one set 50µl cells/150µl LB, one set 200µl cells/100µl LB, put plates in 37°C overnight.

8/12/2011

Blue/white colonies observed for all, except STMutr, which had no growth for both 50µl and 200µl plates. Picked white colonies and restreaked on LB+carb, put in 37°C.

PCR of ß-Carotene producing yeasts to determine which strain is which. The ORFs all have the same promoter and 3'UTR so after PCR with one set of primers I expect to see bands corresponding to each gene.

50µl reaction

Component	Volume (µl)
2x GoTaq Green Master Mix	25
Forward primer (10µM)	5
Reverse primer (10µM)	5
gDNA template	200ng
dH2O	to 50
Total	50

PCR Program: 2 min @ 95°C, 30x(30s @ 95°C, 30s @ 52°C, 2 min @ 72°C), 5 min @ 72°C

ORF	Expected Size (bp)
crtE	1131
crtYB	2234
crtI	2011
BTS1	1008

8/13/2011

Inoculated 5ml LB w/streaked out white colonies with remaining promoters/UTRs, put in 37°C drum.

Inoculated 25ml LB w/ TOP10 for competent cell preparation.

8/14/2011

Began preparation of competent cells, but did not have time to finish, so abandoned this.

Miniprepped 8/13 remaining promoter/UTRs.

8/15/2011

BsaI restriction digest of 8/14 minipreps to check if promoters/UTRs ligated correctly.

40µl reaction

Component	Volume (µl)
10x NEBuffer 4	4
miniprep product	20
BSA (100x)	.75
dH2O	15.25
Total	40

Incubated @ 50°C 2 hours.

All fragments looked correct, so made 15% glycerol stocks of the E. coli they came from and stored in iGEM -80°C space.

Picked another white colony and inoculated 5ml LB with E. coli containing pTZ19u with STM1utr SmaI ligated in.

8/16/2011

Miniprepped and BsaI digested STM1utr, same protocol as 8/15.

Lab:27 stm1 miniprep digest 8 16 11.jpg?640 No fragment observed.

8/17/2011

Picked all white colonies (5) from 1st transformation for STM1utr, streaked out on LB+carb, put in 37°C incubator.

The primers for RPS2utr arrived: Did 50µl reaction according to Herculase II protocol with 20µM control primers ZK096/097.

PCR program: 2 min @ 95°C, 30x(20s @ 95°C, 20s @ 58°C, 30s @72°C), 3 min @ 72°C. PCR product to -20°C.

8/20/2011

3/5 white colonies for STM1utr grew, but were too overgrown to pick single colonies, so were restreaked on LB+carb and put in 37°C.

Ran gel of RPS2utr PCR product from 8/16, extracted. Lab:28 rps2utr gel extraction fixed 8 20 11.jpg?640

8/22/2011

Inoculated 5 ml LB w/STM1utr (3 colonies), put in 37°C drum.

Gel purified RPS2utr according to Qiagen gel extraction protocol.

Nanodrop of possible RPS2utr product: 8.0 ng/µl.

Loaded 12.5µl (~100ng) in 2% MetaPhor agarose gel to verify product.

Lab:29 rps2utr post purification 8 22 11.jpg?640 Product is too small.

8/23/2011

Streaked out ß-carotene yeasts on YPD, put in 30°C incubator for enzyme assays.

Miniprepped 3 STM1utr samples.

Did overnight BsaI digest @ 50°C according to 8/15 protocol.

8/24/2011

Ran digested STM1utr: Lab:30 stm1utr miniprep digest 8 24 11.jpg?640 Got one good colony, made 15% glycerol perm of liquid culture (500µl 30% glycerol/500µl cells), put in -80°C w/other promoter/UTR E. coli.

8/25/2011

Another PCR attempt for RPS2utr.

50µl reaction using Herculase II protocol along with 20µM control primers (ZK096/097).

PCR program: 2 min @95°C, (20s @95°C, 20s @45°C, 30s @72°C), 3 min @ 72°C

Ran possible RPS2utr product on gel, extracted. Lab:31 rps2utr gel extraction 8 25 11.jpg?640

Gel purified according to Qiagen Gel Extraction protocol, nanodropped cleaned product: 8.9ng/µl. Loaded 11.24µl (100ng) on gel to verify product. Lab:32 rps2utr post purification 8 25 11.jpg?640 Product looks correct.

8/29/2011

Ligation of RPS2utr PCR product into SmaI-digested pTZ19u.

20µl reaction w/6 molar insert to vector ratio:

Component	Volume (µl)
10x T4 buffer	2
SmaI linearized pTZ19u (25.2 ng/µl)	1
T4 ligase (Enzymatics, 120U/µl)	1
RPS2utr (8.9ngµl)	.66
dH2O	15.34
Total	20

Ligation at 25°C overnight.

Streaked out 23 other promoter/3'UTR containing E. coli from -80°C glycerol stocks on LB+Carb, put in 37°C incubator for inoculation of liquid cultures for miniprepping to make stocks of fragments.

8/30/2011

Transformed RPS2utr/pTZ19u ligation into TOP10 cells according to Lab:oneshottop10 man.pdf. Spread 50µl in 150µl LB and 200µl in 300µl LB on LB+Carb plates w/40µl 40mg/ml X-Gal spread previously in 160µl LB. To 37°C incubator.

9/2/2011

Couldn't come in to take transformation plates out, plates are too overgrown to be any good.

Miniprepped 23 promoters/3'UTRs according to E. Davis protocol.

40µl BsaI digest of minipreps.

Component	Volume (µl)
10x NEBuffer 4	4
miniprep	18
BsaI (10U/µl)	1
dH2O	14.5
Total	37.5

50°C overnight incubation.

9/3/2011

Heat kill BsaI 65°C 20 min. Gel extraction of all parts.

9/9/2011

Gel purification of all parts according to Lab:qiaquick spin handbook-1.pdf.

Nanodrop concentrations of products (ng/µl)

Fragment	concentration (ng/µl)	Fragment	concentration (ng/µl)
TDH3p	14.9	FCY2p	22.0
TDH3utr	6.2	FCY2utr	6.0
RPL24Ap	9.0	PRY1p	13.4
RPL24Autr	4.5	PRY1utr	8.1
RPS8Bp	22.0	ARD1p	8.0
RPS8Butr	5.3	ARD1utr	6.5
RPS2p	18.8	KRE9p	6.9
RPS2utr	----	KRE9utr	8.4
RPL8Ap	11.1	HHO1p	7.8
RPL8Autr	13.6	HHO1utr	7.5
STM1p	15.2	BAP2p	15.9
STM1utr	5.9	BAP2utr	19.2

Ran 100ng each to verify product. Lab:34 prom utr post purification 9 9 11.jpg?640 DNA is not very visible, will do another round of minipreps.

Streaked out another round of 23 promoters and 3'UTRs from -80°C on LB+Carb, put in 37°C.

9/10/2011

Inoculated 5ml LB w/colonies from overnight plates. Plates to cold room, liquid cultures to 37°C drum.

Hybridized loxPsym oligos: Resuspended ssDNAs to 100µM, took 10µl of each in one tube, put @ 94°C 10 minutes, moved to bench and then to cold room for slow cooling.

Nanodropped ss + strand, ss - strand, and ds loxPsym linker. + strand- 1360ng/µl - strand- 1345ng/µl double stranded- 2096.7ng/µl

Ran 1µg of each on 2% MetaPhor agarose gel.

Lab:35 loxpsym linker hybridization 9 10 11.jpg?640

9/11/2011

Miniprepped all 23 overnight cultures according to Marty Taylor's Lab:miniprep without columns mst.doc, put liquid cultures in cold room.

9/12/2011

Nanodrop all minipreps from 9/11.

Fragment	Concentration (ng/µl)	Fragment	Concentration (ng/µl)
TDH3p	292.1	FCY2p	116.4
TDH3utr	288.2	FCY2utr	298.4
RPL24Ap	84.0	PRY1p	253.1
RPL24Autr	385.0	PRY1utr	308.3
RPS8Bp	317.6	ARD1p	54.1
RPS8Butr	235.8	ARD1utr	299.2
RPS2p	338.1	KRE9p	290.7
------		KRE9utr	566.7
RPL8Ap	307.8	HHO1p	292.9
RPL8Autr	280.5	HHO1utr	175.4
STM1p	27.3	BAP2p	262.7
STM1utr	354.2	BAP2utr	337.8

Digested all promoters with BsaI, split 3'UTRs into two aliquots, digested one with NotI, then realized that in order to cut the entire 3'UTR and URA3 out I would have to digest with BsaI, which works in buffer 4, while NotI works in NEBuffer 3. Digested the other UTR aliquot with NotI-HF, which works in NEBuffer 4.

9/16/2011

PCR of URA3 w/Herculase. 8 reactions in parallel.

50µl reaction

Component	Volume (µl)
gDNA template (156 ng/µl)	1
Herculase II polymerase	1
Herc. II 5x Buffer	10
URA3 fwd primer (10µM)	1.25
URA3 rev primer (10µM)	1.25
dNTP mix (2.5mM ea.)	5
dH2O	30.5
Total	50

PCR program: 2min @95°C, 30x(20s @ 95°C, 20s @42°C, 34s @ 72°C), 3 min @ 72°C.

Got 8 very bright bands at correct size (1134bp), extracted all and purified according to Lab:qiaquick spin handbook-1.pdf.

Nanodropped 8 URA3 gel purification products:

URA3 fragment	Concentration (ng/µl)
1	28.8
2	21.6
3	21.9
4	23.2
5	28.5
6	33.7
7	33.8
8	23.8

9/17/2011

NotI-HF digests of all 8 URA3 PCR products.

55µl digest

Component	Volume (ng/µl)
URA3 PCR product	48
10x NEBuffer 4	5.5
BSA (100x)	.55
NotI-HF (20U/µl)	.3
dH2O	.65
Total	55

2 hour digest @ 37°C, 20 min heat kill @ 65°C.

Ligation of URA3 into 3'UTRs, also a ligation of plain RPS2utr. 20µl ligation (same protocol as 7/30. 1 hour at 25°C. Transformed into DH5α competent cells (Lab:oneshottop10 man.pdf). Spread two volumes of cells, 50µl cells in 250µl LB and 200µl cells in 300µl LB.

9/18/2011

Transformations showed mixed results. Many plates showed only white colonies. Picked 7 colonies from good plate and 2 colonies from bad plates for miniprep and digestion to check for URA3 ligation. Inoculated in 5ml LB+carb.

9/19/2011

Miniprepped 9/18 liquid cultures (Lab:miniprep without columns mst.doc).

9/20/2011

BsaI digests of URA3 3'UTR ligations.

50µl digests

Component	Volume (µl)
Miniprep DNA (~1.2µg/µl)	1
10x NEBuffer 4	5
BSA (100x)	.5
BsaI (10U/µl)	1
dH2O	42.5
Total	50

9/23/2011

Ran gels of 9/20 digests. Lab:36 utr ura3 tag gel 1 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 2 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 3 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 4 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 5 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 6 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 7 9 23 11.jpg?640

Lab:36 utr ura3 tag gel 8 9 23 11.jpg?640

Made SC-his-leu-ura plates for Vitamin C transformations.

Component	Volume (ml)
2x SC--8	250
20% galactose	50
40mM trp	5
16mM ade	5
100mM lys	5
50mM met	6
4% agar	250

Violacein Biosynthesis in Yeast

June 7th, 2011

Purpose:

1. Make 4 copies of violacein building blocks and select promoters and 3’UTRs on 96 well plates. 2 were made previously by Dr. Boeke's Lab Tech and I (not entered into wiki). Therefore I am only making 2 new copies today.
2. Begin growing colonies on petri dishes (to prepare for miniprep).

Procedure:

• Made 100ml LB+Carbenicillin Solution (ampicillin resistance gene also resists Carbenicillin) using 100uL 1000x Carbenicillin (thawed from -20 degrees Celsius) and 100mL LB Broth.
• Labelled plates and Petri Dishes
  • Except for one petri dish (forgot to add a label), each label says: “iGEM: Boeke promoter, 3’ end & Vio BB’s from YW (pseudonym); F2.”
• Transferred LB+Carb solution to a ‘sterile reagent reservoir for multi-channel pipetting.
• Took out a previous copy of the genes (arrayed on a 96 well plate) from -80 degree freezer, placed in a centrifuge with a balance.
  • Centrifuged until speed reached 1000g (short spin).
• Used a 12-lane multichannel micropipette to transfer 100uL of LB+Carb to rows A-D on new 96 well plates.
• Placed air-pore tape on each new 96 well plate (now inoculated) and incubated them at 37 degrees Celsius.
  • Incubated petri dishes at 37 degrees.

Problems:

• I added LB+carb to every well in rows a-d. The original array only filled row A/C, half of row B and 11/12 wells in Row D.
  • Always remember how original array was organized and always stick to it.
• Original plate (the one being copied) was left out for around 50min. Not good.
  • Next time, only take out plate from -80 after each new 96 well plate/petri dish has been prepared for inoculation (e.g. LB+Carb should be added to wells before original plate is taken out to thaw).
• I am still learning where everything in the lab is. This will take time.
• When pipetting, I would scrape the tip onto the side of the well to get rid of the final drops. This motion resulted in me almost mixing the original cultures.
  • Remember: Do not worry about “pipetting the last drop.”
• When inoculating petri dishes, the liquid sprayed out of the tip instead of dripping out.
  • Don’t let the liquid spray out of the tip, the different cultures may mix.

June 9th, 2011

Purpose:

• Inoculated test tubes (filled with ~ 5mL LB+Carb)with each part (Vio ORF Building Blocks (ie ORF fragments), Promoters and UTR's)

Procedure:

• For each part, took wooden stick, placed flat end onto a single colony on the agar plate, dipped stick into the appropriate text tube (inoculating the test tube) and threw out the stick.
• Incubated them overnight at 37 degrees on a shaker (a slanted spinning wheel with slots for test tubes).

June 10th, 2011

Purpose:

• Mini-Prep of parts (Vio ORF Building Blocks, Promoters, UTR's)
• Double Cut Restriction Digest of Mini Prep Samples (to run an analytical gel to check if the correct inserts (parts) are present).

Procedure:

• See File:Miniprep stet prep pm .pdf for boiling mini prep.
• See Double Digest Reaction Mixes here
  • All other parts (promoters and UTR's) double digested with XmaI and SphI)
• See neb.com for correct digestion procedures with each enzyme.
• After digestions completed, stored samples at -20 degrees Celsius.

Results:

Results show high concentrations of plasmid, too high. In reality there is RNA in the solution too and nanodrop detects nucleic acid without distinction for DNA or RNA. According to Dr. Boeke’s Lab Tech, the readings still indicate that the DNA concentration is probably high.

Problems:

Mini Prep:

• Instead of boiling all 29 samples at once, I boiled 15 and then 14. For the first 15, I boiled for 2min 45sec and not the required 3 minutes. The reason: the water was not boiling when we entered the samples. At the last minute, we had to refill the bath with hot water and place the samples in. We set the timer for 4 minutes and the water started to boil with 2minutes 45seconds left.
• Sometimes during mini prep, I did not change the tip for each sample while aspirating supernatant.

June 11th, 2011

Purpose:

• Gel Electrophoresis of Yesterday's Digests

Procedure:

• Added 4uL CS Red Dye (with added RNAse) to each sample and 2 log ladder.

Problems:

• Added 7uL Dye to VioA2
• Ladder Didn't show up on the gel (must redo tomorrow).

June 13th, 2011

Purpose:

• Redo Digest (No image uploaded), the ladders on the gel did not show up. Will use 2 log ladder with blue Juice this time and not CS Red. Will add a second digest condition for VioE, using a BsaI single cut.
  • Note: Although the ladder couldn't be seen properly, we agreed that the patterns/digests were correct and matched what we expected. We believe there is nothing wrong with our restriction enzymes or our starting material (parts).

Procedure:

• See reaction here
• See neb.com for correct digestion procedures.

Problems:

• Accidentally heated VioE2 tube with the others at 37 degrees. After 37 degree heating, I Placed it in 50 degree water bath for around 1hour 55minutes. Made a PCR tube of new VioE2 solution (according to above table) and used thermocycler (PCR machine) to heat it for 2hours at 65 degrees and refrigerate it (4 degrees) afterwards). Still not the right temperature. I made yet another PCR tube of VioE2 (VioE2=VioE cut with BsaI) and 'PCR'd' at 50 degrees (I refer to this tube now as 'VioE BsaI cut (3).'
• "R" from Zhu lab took VioD BB’s and VioE2 out for me and placed the samples in my minus 20 freezer space. I left the lab when I put them to digest.

June 14th, 2011

Purpose:

• Run a preparative gel (a gel for gel extraction/purification of Vio ORF Building Blocks).

Procedure:

• Made 200uL of 1% agarose gel with 1x Ethidium Bromide (diluted from 20000x) added.
  • 25 thick lanes indented into gel.
• Planned Lanes:

• • • Note: Lane 25 for this run was for VioE BsaI Cut (3) (see June 13th's 'Problems' section).

Results:

• Gel looked fine. Got expected band patterns. See todays 'Problems' section

Problems:

• It's not good practice to take a picture of a gel before gel extraction, UV exposure can damage the DNA. Hand held UV light can go to long wave, unlike the 'picture taker, which uses only short wave UV light' Long form is less harmful to the DNA. This gel must be re-done.
  • Note: New practice is to allow pictures before gel extraction, but exposure to short wave UV light must be as short as possible (less than a split second is good).
• See 'Blooper' section. As we exposed the gel (today's image on the wiki) for a short time to short UV, we could have used it for gel extraction. Unfortunately, it fell and shattered.
• I redid the digests according to the June 13th protocol to run a future analytic gel (to definitively see if the patterns are what we expect).
  • Note: I also ran another exact set of digests in parallel for a future preparative gel for gel extraction.

June 15th, 2011

Purpose:

• Run an analytical gel to determine if the digests worked before we do a preparative gel.

Procedure:

• Made 2x 200mL 1% gels with EB, exactly like the June 14th Gel.
• Made a 100mL gel with 25 thick, narrow lanes. We decided that we should use a smaller gel for an analytical gel. This way (out of 1 tube of 25uL digest mixture + CS Red) we can load 3uL for the analytical gel and the rest for the preparative gel. I originally made a copy of each digest; one for analytical, one for preparative. We decided to use one copy for both (the second set of digests I made remain unused).
• 2 log ladder in lane 2, 100bp ladder in lane 24.

Data:

Problem:

• Accidentally switched the 2nd copy Vio B BB1 (which should have remained unused) with the first copy of VioB BB2 (which should have been loaded). It was a mis-labelling error. There are 2 vio B BB1 samples in the analytical gel (lanes 5 and 7), and no VioB BB2. We decided we could proceed to the preparative gel step as I found the 1st copy VioB BB2.

June 19th, 2011

Purpose:

• Plan with Zheng how to do a ligation reaction (I planned today to digest the vector in preparation for the gel extraction and future ligation of ORF buidling blocks).

• Final Planned Procedure for Ligation:

• • Note: If using enzymatics reagents, ligate at room temp for an hour. If NEB reagents, 16 degrees Celsius (from now on, all temperature measurements are in Celsius) overnight.

June 20th, 2011

Purpose: Gel Extraction

Procedure: See Qiagen Gel Purification protocol, June 13th Gel Specifics

• Only 16uL VioE 2x RE Cut loaded into the gel.
• 120V 15min, 10V 15min, 130V 10 Min (all to try and separate 2 bands, only 1 of which we wanted to extract.
• Left for home after QG, NaAcetate and 100% Isopropanol were added to the excised gel fragments (experiment not finished yet). A post-doc said this is OK to do.

June 21st, 2011

Purpose:

• Finish gel purification

Results:

• DNA concentrations are small, but workable. I digested 30uL of each ORF with 1uL of each enzyme and added dye just in case.

June 22nd, 2011

Purpose:

• Just came in to add dye to the VioD digests (they need to be digested at 2 temps, which is why I didn't add dye to them with the others).

June 30th, 2011

Purpose:

• Replica Plate transformed colonies from LB+Carb plates to LB+Carb+XGal+IPTG Plates.

Procedure:

• Mixed 3ml LB with 500uL 1000x IPTG and 500uL 1000x XGal.
  • Spread 19X200uL aliquots of this solution onto 19 LB+Carb Plates using sterile glass beads.
  • Note: I selected 15 out of 31 plates for replica plating and made 4 extra Xgal plates just in case.
• Dr. Boeke said to let transformed colonies grow more at 37 degrees.
• Left the 15 selected plates in the 37 degree incubator, left the new xgal plates to soak on my bench, placed all other plates in the 4 degree fridge.

Problems:

• Wasted lots of time thawing the xgal because its solvent is DMSO and I left it on ice to thaw. Note: Never leave DMSO on ice to thaw, it will not melt. Do not even leave thawed DMSO on ice, it will refreeze quickly.
• Be more careful when pouring beads, wasted a couple.

July 1st, 2011

Purpose:

• Replica Plate transformed colonies from LB+Carb plates to LB+Carb+XGal+IPTG Plates (made yesterday).
• Inoculate glass tubes for mini prep for each white colony on the xgal destination plates.

Procedure:

• Drew a line on original plate and destination plate. Used it to make sure destination plate colonies had the same orientation as original plate. Looked for white colonies in the evening.
• Pressed original plate onto a sterile velvet, pressed empty destination plate onto the newly 'dirty' velvet to pick up the colonies.
• Filled glass tubes with 5mL LB+5uL Carb, labeled them according to ligation condition (16 degree or room temp incubation), transformation volume (e.g. 180uL transformation mixture added to the plate) & sample name (e.g. VioA, VioB,...VioE).
• For all white colonies on the destination plates, I found the colony location on the destination plate and picked it with a wooden stick(pressed the flat end onto the colony, avoiding small satellite colonies). I then shook the picked colony in the LB mixture vigorously, threw the toothpick, and placed the tubes in a 37 degree shaking incubator overnight.

July 2nd, 2011

Purpose:

• Miniprep from yesterday's inoculated tubes.
• Digest

Procedure:

July 3rd, 2011

Purpose:

• Run an analytical get to see if the correct inserts are present.

Procedure:

• Prepare a 200mL 1% agarose gel with EB and 25 think lanes.
• Add 10uL of digest and CS red dye.
• Run at 150V and take picture after 40min.

Results:

• C, D, E ligated well, but E-90-R did not ligate.
• Dr. Boeke suggests making replica plates of all other A, B plates and searching for a white colony.

July 5th, 2011

Purpose:

• Make 14 replica plates of A/B

Procedure:

• Used 25mL of agar, 25uL of IPTG and Xgal, and 150mL LB
• Mix consists of 375uL of Xgal, 375uL of IPTG, and 2250uL of LB for a total volume of 3000uL.
• 30, 90, and R 30uL plates held at 16 degrees Celsius.

Results:

• VioA and VioE 30uL RT had no colonies.
• Because the original colonies were very small, the 90uL B was not re-plated to allow it to grow more.
• All colonies incubated at 30 degrees Celsius to try to lower the amount of Halos.
• Note: Halos: Original colony secretes resistance protein for other colonies to leech off of. Only good colonies survive in liquid suspension, as Halos can't effectively leech anymore. Streaking on a new plate kills most Halos too.

July 6th, 2011

Purpose:

• Find whites on replica plate B-90 1b and inoculate the white on the A XGal plate
• June 27th ligation: aliquot 5uL and save, leave the rest overnight.
• Transformation (June 27th protocol)
• Protocol:
• Transform dilute PTE 19 after first A/B tubes heat shocked.
• Put ligation tubes back to 16 degrees Celsius after heat shock of vector and negative control.

Results:

• One plate of A-30-RT has a white-ish colony (Placed in 37 degrees Celsius to see if it turns blue
• All useless inoculated plates from yesterday thrown out (except the whitish A, which was put in 4 degrees Celsius).
• No DNA control full of bacteria
• PTE19 plate empty
• PTE-LB plate chalk full
• Conclusion: No DNA plate and PTE19 plate (LB-Carb) switched. No DNA bacteria went to PTE19 plate and vice-versa. PTE cannot be toxic as it grows on LB.

July 7th, 2011

• Protocol:
• Inoculate from July 5th VioB (85uL, 45uL at 16 degrees Celsius) and July 30th VioA (180uL at 16 degrees Celsius)
• Replica plate July 6th VioA (30-90-180 at 16 degrees Celsius)
• PTE19 plate in 4 degrees Celsius and negative DNA and PTE LB (proof)

Results:

• "All whitish A" from yesterday was blue...not using it.
• July 5th 15uL VioB had ambiguous large colonies, want to let it grow

July 8th, 2011

Purpose:

• Miniprep B-T 16-285 a, B-T 16-245 & A 16 180 (Take 3mL of each and split into 2 1.5mL tubes)

Procedure:

• Aided STET suspension by heating at 37 degrees Celsius for 5min
• After double digest, run 100mL 1% agarose gel with EB for 25min
• Inoculate relica whites if gel doesn't work
• Vortexed B-T456 and A minipreps before adding to digest mix
• Run 50mL 1% agarose gel with EB for 25min at 150V

- Lanes: Ladder, A, B-45, B-85, Ladder

Results:

• Inoculated B-T 16-285 b and c were clear, with no bacteria
• 15uL VioB had no colonies
• VioA 185 and B 95 had one white colony each
• Gel broke, but probably still worked
• Dr. Boeke suggests digesting with the middle restriction enzyme (for the unique restriction site that stitched the BBs together)to make sure to make competent cells, design primers to add BSAI sites and unique sequences for each Vio expression cassette objective, and stitch all cassettes to the neochromosome in one go.
• Suggestions: Whenever measuring pieces, always digest the vector alone and run it alongside the others. Also, run gels longer, add EB to TE.

July 9th, 2011

Purpose:

• Make sure no internal BsaI or BsnbI sites are in any designs.
• Double digest within regions (no E required, at least 3 Bs)
• Single digest with BsaI
• Choose the more plentiful Eu out of XmaI and SphI
• Design primers according to the incoming Boeke diagram

July 10th, 2011

Procedure:

• Run gel at 150V for 1 hour (500mL, 1% agarose)
• Lanes: Ladder, A B C D (BsaI), A B B2 B3 C D, Ladder
• Add 400mL TE and and EB

Results:

• Digest went too long, need to redo
• BsaI and DraII at 37 degrees Celsius for 50min
• XbaI is gone - finished, will stick with a DraIII, BspHI 28cut
• Make mixes

July 11th, 2011

Purpose:

• Make 500uL of CS red dye with 0.1ug/uL of RNAse
• Digests

July 12th, 2011

Purpose:

• Run gel at 150V for 75min (1% agarose with EB in gel and buffer, 5uL CS red dye per sample)
• design Boeke oligos
• Protocol:
• Lanes: Ladder, BsaI A B B B, Ladder, BsaI C C D D, Ladder

Results:

July 13th, 2011

Purpose:

• Run 50mL 1% agarose gel with EB (300mL TTE & 15uL EB for 45min at 150V)

Results:

• VioB is not here :( Transform overnight ligations, miniprep and try again

July 19th, 2011

Purpose:

• Digest and ligate B 1, 2, 3 to PTZ19u tomorrow
• Transform overnight ligations
• Design oligos

July 23th, 2011

Purpose:

• Ligations
• Finish oligos with Boeke

Procedure:

• Cooked vector at 65 degrees Celsius for 20min

Results:

• Will aliquot 6uL for transformations. Leave rest overnight
• Make sure melting temps for yeast DNA regions are nearly equal +/- 1-2 degrees best (so that lengths are nearly equal)

July 26th, 2011

Purpose:

• Cook all my ligation rxns for 10min at 65 degrees Celsius
• Digest available ORFs with BsaI in preparation for gel purification
• Strategy: Take bare minimum (may need to redo)

July 27th, 2011

Purpose:

• Gel purify ORFs
• Digest PTZ14u with BsaI to load with other 4 samples

Procedure:

• Gel lanes: Ladder, A C D E PTZ19u

Results:

• A is suspect, may be contaminated with upper band
• C is inseparable on this gel
• Mixed D and E, must redo and repeat July 26 digest
• Run bigger and longer gel next time

July 28th, 2011

Purpose:

• Gel extractions on long plate (300uL TTE and 3g agarose and 15uL EB)
• Procudure:
• Run for 1.5hr at 150V
• Lanes: Ladder, A C, Ladder, D E, Ladder
• Make new wide, thin gel (1.5% to run at 100-120V). Tape combs together and add 12.5uL per well.

Results:

• Blue band at ~300bp, gel was slow

July 29th, 2011

Purpose:

• Run gel for 2hrs
• Purify what you can. If time permits, set up a double digest.

Results:

• DNA did not diffuse from the refrigeration. (Don't try to do too much in a day)
• A and D melting gel at 48 degrees Celsius, closest block available
• A: 3.2ug/uL
• D: 9.1ug/uL
• C: highly suspect of contamination, 10.8ug/uL

August 1st, 2011

Purpose:

• Transform B1, 2, 3
• Make 6x XGal plates (1 for 2hrs, one for overnight)

Procedure:

• 2hr: 50 and 500 uL
• Overnight: 50 and 500uL (no DNA, just vector only)

August 2nd, 2011

Purpose:

• Transform B 1, 2, 3
• Digest promoters with BsaI
• ligate to appropriate ORFs

August 4th, 2011

Purpose:

• Digest vector with XbaI and XmaI at 37 degrees Celsius for 0.5hr.

Procedure:

• Cook digest, run 50mL 1% agarose gel with EB of all BBs (ligation mix, individual parts, ladder, and uncut vector (all>10ug))
• Transform with 1ug uncut vector
• Larger than 30uL...insert digest
• After 2hrs, check on gel and leave on for 3hrs.

Results:

• some wells too shallow

August 5th, 2011

Purpose:

• Ligation and transformation

Results:

• Did not digest vector first
• added wrongly-digest vector

August 6th, 2011

Purpose:

• Prep PTZ19u for ligation
• Prep ligations to add digest vector

Procedure:

• 200uL PB, vortex, column, spin for 1min, discard, add 750uL of TE, spin for 1min, discard, spin for 1min @1300rpm, discard, add 25uL EB, spin 1min (into new tube), nanodrop
• Add 25uL of water, 3uL T4, 3uL ligase. Split to three tubes, each containing 20uL. (Label 1:3, 1:5, 1:10)
• Add 1, 2, 3 to right tubes, add 1 to vector tubes.
• Ligate 2hrs overnight, transform 1uL, ligate

August 9th, 2011

Experiments Performed by Xin Yuan (see Acknowledgments ). These entries are transcribed from her lab notebook.

• Ran a gel to verify size/presence of VioB Building Blocks in previous gel purifications.
• It’s not on my notes, but according to the brightness of the bands, I think I ran 1ul for the Elu product and 3 ul for B1 B2 B3 B4

 * ladder  B1Elu  B1  B2Elu  B2  B3Elu  B3  B4Elu  B4

• Redo Ligation: Purpose is to get VioB by ligation
• Rxn1: B1:3ul B2:3ul B3:3ul vector:1ul T4 ligase:1ul T4 10xBuffer:2ul H2O:7ul Total=20ul
• Rxn1Control1: B1:3ul B2:3ul B3:3ul XmaI XbaI vector:1ul T4 10xBuffer:2ul H2O:8ul Total=20ul
• Rxn1Control2: XmaI XbaI vector:1ul T4 ligase:1ul T4 10xBuffer:2ul H2O:16ul Total=20ul
• Rxn2: B1:3ul B2:3ul B3:3ul B4:3ul vector:1ul T4 ligase:1ul T4 10xBuffer:2ul H2O:4ul * Total=20ul
• Rxn2Control1: B1:3ul B2:3ul B3:3ul B4:3ul XmaI SphI vector:1ul T4 10xBuffer:2ul H2O:5ul * Total=20ul

• Rxn2Control2: XmaI SphI vector:1ul T4 ligase:1ul T4 10xBuffer:2ul H2O:16ul Total=20ul

Ligate for 2 hours

• Then use LA Taq to do PCR.

cocktail and DNA:

• Ligation DNA 1ul

• PCR Rxn Mix

Primer1: 1ul Primer2:1ul La Taq: 0.5ul 10x Buffer: 5ul dNTP: 8ul H2O:33.5ul Total: 50 ul

• PCR condition:

94 degree 1 min 30 cycles: 94 degree 30 seconds 55 degree 30 seconds 72 degree 1 min 72 degree 10 min 4 degree infinitely

• PCR Gel:

• It’s hard to tell if there’s any band below the first well. I inverted, and adjusted many times on the picture taking machine and saw a super light band which can’t be shown on the picture.
• It’s not on my notes, but I sense this is a picture of gel which contain 2 product, the new VioB is the PCR version of my ligation product, the old VioB may be yours ligation product which I might also PCRed.

• In the following picture, only 2 wells are for iGEM. Those 2 wells proved that puc19 vectors were purified. Other wells are for my personal projects in the Boeke Lab.

• Lastly, transformation: 4 controls and 2 rxns and 1 no DNA control

August 22nd, 2011

Purpose:

• Draw up offcut ligation for RFC assembly standard

Procedure:

• Digest 30uL E180 16-1 (7/2/2011) and run it by two purified ORFs
• Run 20-well gel (thin comb, B2-20, 200mL 1% agarose with EB). Load 50ug

Results:

• Purify E, use rest of digest product

August 23rd, 2011

Purpose:

• End Goal: 58ng scale ligation of VioE to its TDM3p and RPL8a utr

Procedure:

• Gel purify what's left of digest (took 10uL out of 40uL solution)
• Run 7x8cm gel (100uL, 1% agarose, and 5uL EB)
• Digest 10uL of each promoter/utr

Results:

• Prep Gel Pic:

August 24th, 2011

Purpose:

• Overhang PCR

August 25th, 2011

Purpose:

• Analytical gel of VioE cassette PCR product

Results:

• Gel Pic:

August 26th, 2011

Purpose:

• End Goal: Ligate VioB ORF to RPS2p & utr (5ug for each part)
• Gel purify ORF after BsaI digest
• Digest p & utr

Results:

• Used wrong tube
• Gel Pic:

August 29th, 2011

Purpose:

• Digest VioB DNA with BsaI and BsaI/XbaI

Procedure:

• Run 7x8 1% agarose gel for 35min at 150V

Results:

• Pre-Gel Extraction:

• Post-Gel Extraction:

August 30th, 2011

Purpose:

• Overhang PCR of VioB expression cassette

Procedure:

• Recommended extension time is 2min at 72 degree Celsius
• Run 6-well 50mL 7x8 1% agarose gel at 150V (add 2.5uL EB)
• Lanes: Ladder, 0.5 1 2, Ladder

Results:

• Bands turned out correct
• Gel Pic:

September 1st, 2011

Purpose:

• End Goal: Design, Digest, and Ligation of all 5 Vio genes
• Nanodrop all products

Procedure:

• Ligated according to Aug 23rd protocol. Left at room temp.

Results:

• Lost VioE, re-PCR and gel.

September 2nd, 2011

Purpose:

• PCR cleanup (Invitrogen)
• Design ligation, find PUC19 to digest and do it
• Get reagents for yeast transformation
• Grow culture (inoculate 10mL YPD with 2uL cells for tomorrow, measure OD and dilute based on murkiness on Sunday)

Procedure:

• Run 7x8 50mL 1% agarose gel + 2.5uL EB at 150V for 35min
• Dilute YPD culture, multiply dilution factors by the absorbance reading

Results:

• Gel Pic:

September 6th, 2011

Purpose:

• Final Plan: Select Auxotroph specific vector, get sequence
• Re-PCR expression cassettes and digest internal sites

September 7th, 2011

Purpose:

• Get PRS416 DNA, digest with EcoRI and HindIII
• Find smallest possible bar and comb

Procedure:

• Run 150mL 1% agarose gel with 7.5uL EB at 160V
• Lanes: 300ug 200ug, Ladder, 100ug 50ug 25ug 10ug 5ug 1ug
• Lanes: 300 200 100(1) 100(10) 50 25 10 5 1(1) 1(10)
• Lanes: 10 50 300 200 100

Results

• Water makes ladder float, not sink

September 8th, 2011

Purpose:

• PCR cleanup products (amplify them)
• Gel purify PRS416
• PCR Purify again
• Gel purify

Procedure:

• Run 7x8cm gel(50mL, 1% agarose, 2.5uL EB)
• Lanes: Ladder, A B C D E

Results:

• Gel Prep Pic:

• Analytical Gel Pic:

• A, B, C, D good, E is too small (don't purify)
• Redo E, likely primers were wrong
• Use 1uL PRS as positive control in transformation
• Redo PCR (cleanup took out final product)

September 9th, 2011

Purpose:

• Transform ligation misses and no DNA or vector control
• Redo PCR for VioE

Procedure:

• Add 5uL positive and negative ligation and 1uL PRS416
• 2min on ice
• Heat shock for 45s
• Ice for 2min
• Added 450mL SOC to each
• 1hr on shaking incubator
• 1 plate (50uL), next plate (centrifuge 7000rpm for 25s)
• Take 350mL supernatent out, plate rest after resuspension with pipet

Results:

• Can't tell which tube was PRS416, and no DNA.

September 10th, 2011

Purpose:

• Miniprep colonies and digest them

Procedure:

• Run 7x8 50mL 1% agarose gel with 2.5uL EB
• Lanes: 5uL Ladder, 10uL each of E(new) and E(old)
• Redid VioE PCR from ligation mix
• PCR cleanup with Qiagen
• Gel purify of undigested PCR clean product
• Run 12x14 150mL 1% agarose gel with 7.5 EB
• Lanes: A, Ladder, B X, Ladder, C X D, Ladder, E X X

Results:

• Gel Pics:

• Amplified the wrong fragment?

September 12th, 2011

Purpose:

• Colony PCR design

September 13th, 2011

Purpose:

• Colony PCR

Results:

• Gel Pics:

September 15th, 2011

Purpose:

• Religate in case yeast transformation didn't work
• Colony PCR

September 16th, 2011

Purpose:

• Colony PCR gel (each 96-well plate section of 3 rows occupies one gel row)
• Redigest PRS416 and test plasmid with EcoRI and HindIII

Procedure:

• Run 7x8cm 50mL 1% agarose with 2.5uL EB gel
• Lanes: PRS X Ladder, PAR...6wells

Results:

• Gel Pics:

• Did it work?
• 4th colony section the best