Matt:LabNotes/2015-2-28
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CA12k_Nov2014_V4 Probe Production[edit]
- Production of Padlock Probes (V4) Matt:LabNotes/2014-11-19#Assembly_of_oligo_pool_for_ordering
Production PCR[edit]
- 10nM 1st round amplicons
- V4 master mix made in 2 5ml tubes
Components | Volume (1X) | Volume (100X) |
First round amplicon CA12k_Nov14_V7 (10nM) | 0.2 | 20 |
2X KAPA SYBG MM | 50 | 5000 |
AP1V4U (100uM) | 0.4 | 40 |
AP2V4 (100uM) | 0.4 | 40 |
H2O | 49 | 4900 |
Total | 100 | 10000 |
Program 98C 1min -> (98C 10sec -> 55C 30sec -> 72C 45sec) x 15 -> 72C 2min -> 15C hold File:022815 CA12kNov14 ProductionPCR V4.JPG
EtOH Precipitation[edit]
- 12 5-ml tubes (with 8 wells of PCR product each) for V4
- 800ul PCR product
- 2000ul 100% EtOH
- 2.7ul GlycoBlue
- 80ul 3M NaOAc pH 5.2-5.5
- Vortexed and put in -80C for 30min
- Centrifuged at 3000rpm at 4C for 30 min
- Discarded supernatant and added 800ul of cold 80% EtOH
- Transferred DNA pellet (with 1ml pipette tip) to 12 1.5mL tubes
- Centrifuged 1.5ml tubes at 14,000rpm for 5 min at 4C
- Discarded supernatant and air-dried for 5 min in hood
- Resuspended DNA with 100ul H2O
Qia Column Purification[edit]
- Purified 12 tubes of 100ul in 12 columns following Qiagen protocol
- Eluted each column with 50ul and combined all into one 1.5ml
- Measured concentration with Nanodrop:
~600ul of V4 probes: 82.1ng/ul => ~49.3 ug
Lambda Exonuclease Digestion[edit]
- Divide into 6 pcr tubes of ~100ul with total amplicon of <10ug each
- One of the 6 tubes somehow lost ~40% volume (I think when I was tapping the tubes it splashed out)
Components | Volume |
Amplicon | 96 |
10X Lambda Exo Buffer | 12 |
Lambda Exonuclease | 12 |
Total | 120 |
- Incubated at 37C for 1hr
- Purified with 6 Zymo ssDNA/RNA columns
- Eluted with 40ul each
- Recombined and measured ssDNA with Nanodrop:
- 66.6 ng/ul x 240ul = 15.98 ug( 65% yield)
Remove Amplification Adapters[edit]
USER[edit]
- Split into 4 PCR tubes and add 5ul USER
Components | Volume |
SS-amplicon | 59 |
USER | 5 |
10X DpnII Buffer | 8 |
H2O | 8 |
Total | 80 |
- Incubate at 37C for 2.5 hours
DpnII[edit]
- Added 15ul of the following
Components | Volume |
10X DpnII Buffer | 2 |
100uM RE-DpnII_V4 guide oligo | 5 |
H2O | 8 |
- Incubated at 94C for 2 min, then 37C for 3 min
- Added 5ul DpnII
- Incubated at 37C for overnight (~15hrs)
Zymo Column Purification[edit]
- Eluted 30ul each column (115ul total)
- Nanodrop
- 74.9ng/ul x 115ul = 8.6ug (54% yield)
PAGE Size Selection[edit]
- Run 3 gels
- 200V for 40min
Components | 3X Volume |
V4 Probes | 115 |
TBE-Urea Buffer 2X | 115 |
Components | 3X Volume |
Low Mass Ladder | 3 |
TBE-Urea Buffer 2X | 15 |
H2O | 12 |
Total | 30 |
- Gel 1
File:2015-03-03 CA12kNov14 V4 SizeSelect Gel1.jpg
- Gel 2
File:2015-03-03 CA12kNov14 V4 SizeSelect Gel2.jpg
- Gel 3
File:2015-03-03 CA12kNov14 V4 SizeSelect Gel3.jpg
EtOH Precipitation[edit]
- Put cut out gel in 0.5mL tube (with holes at bottom and centrifuged the tube at 15,000 rpm, for 3 min at RT.
- Transferred the gel remaining in 0.5 mL tube to 2.0 mL tube below with pipette tip.
- Added 900 ul of 1X TE buffer
- Vortexed for 60min at 37 C in incubator
- Centrifuged at 15,000 rpm for 3 min at RT
- Transferred the clear spnt. to 6 Nanosep columns and centrifuged at 15,000 rpm for 3 min
- Transferred the lower layer to Nanosep again and centrifuged at 15,000 rpm for 3 min
- Transferred spnt to 6 fresh 1.5 mL tube (~400ul per tube)
- Precipitated with 1000ul of 100% EtOH, 1.4ul of Glycoblue, 40ul of 3M NaoAc pH 5.2
- Vortexed and placed the 2 tubes at -80C for overnight
- Spun 6 tubes at 10,000rpm at 4C for 30min
- Discard supernatant and add 650ul cold 80% EtOH and spin at 14,000rpm at 4C for 5min
- Discard supernatant and let dry in hood for 10min
- Resuspend each tube with 10ul and combine
TBU Gel Quantification[edit]
- Dilute 2ul to 10ul with H2O
- Add 10ul 2X TBE-Urea Buffer
- Load wells with 2, 4, 6, and 8 ul
- Load Low Mass DNA ladders in 0.5, 1, and 2 ul
- Ran at 200 V for 35min
' | 0.5 ladder | 1 ladder | 2 ul | 4 ul | 6 ul | 8 ul | 2 ladder |
DNA volume | 0.5 | 1 | 0.1 | 0.2 | 0.3 | 0.4 | 2 |
H2O | 1.5 | 1 | 0.9 | 1.8 | 2.7 | 3.6 | 0 |
2X Buffer | 2 | 2 | 1 | 2 | 3 | 4 | 2 |
Total | 4 | 4 | 2 | 4 | 6 | 8 | 4 |
File:2015-03-04 CA12kNov14 V4 GelQuant.jpg
- Only use ladder bands 100bp, 200bp, to get trendline with better R^2
- 55.6 ng/ul => 55.6 ng/ul / (150nt*325Da/nt + 79Da) = 1.14uM (1,139nM) (58ul)