Noi/NOTES/2014-11-4: Difference between revisions

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:- Continue to CapSeq hybridization capture
:- Continue to CapSeq hybridization capture
<br>
<br>
== Part III: SeaCap hybridization capture ==
== Part III: SeqCap hybridization capture ==
* Followed exactly the instruction describe in the User Guide page 22-24
=== Step 1. Preparing for hybridization ===
# Turn on a heat block to 95C. I use thermocycler to heat DNA mix at step 4.9 as I transfer the DNA mix from 1.5mL tube to 0.2ul PCR tube.
<br>
=== Step 2. Resuspend the SeqCap HE Universal and SeqCap HE Index Oligos ===
* I prepare this step in the first time I open the kit
* We have HE Oligo Index set A
# Spin the lyophilized oligo tubes, contained in the SeqCap HE-Oligo KitA briefly to allow the contents to pellet to the bottom of the tube.
# Add 120ul PCR-grade H2O to SeqCap HE Universal Oligo tube (1000uM final concentration).
# Add 10ul PCR-grade H2O to SeqCap HE Index Oligo tube (1000uM final concentration).
# Vortex the oligos plus H2O for 5s and spin down the resuspended oligo tube.
# After use, they should be stored at -15 to -25C
<br>
=== Step 3. Prepare the bisulfite-converted DNA sample library and HE oligos for hybridization ===
# Have ~1ug of the WGBS library pool in a Lo-bind 1.5 mL tube prepare above, including normal control WGBS library pool and cancer patient WGBS library pool
# Thaw the resuspended SeqCap HE Universal Oligos (1000uM) and the resuspended SeqCap HE Index Oligo (1000uM) that matches the DNA adaptor index in the WGBS library preparation
::- In this experiment, I pooled all libraries using barcode adaptor match with all 12 indexes in HE-Oligo KitA (0.8ul each). I pool the same amount of the 12 indexes in kit A and use 1ul of the pooled oligos in step 4.3
<br>
=== Step 4. Prepare the hybridization samples ===
# Add 10ul of Bisulfite Capture Enhancer (found in the ''SeqCap Epi Accessary Kit'') to a new Lo-bind 1.5 mL tube
# Add 1ug of WGBS library pool
# Add 1,000pmol SeqCap HE Universal Oligo 1 and 1,000pmol of the 1000uM SeqCap HE Index Oligo SetA as described above.
## This equal to 1ul of 1,000uM of oligos
# Close the tube and make a hole in the top of the tube's cap with an 20 gauge needle (I poked many holes)
# Dry the mixture of WGBS library pool/Bisulfite Capture Enhancer/Hybridization Enhancing Oligos in a vacuum concentrator on high heat 60C for ~15-20min until it dry up. A little liquid left in the tube between 1-2ul should be fine to prevent over dry.
# Cover the holes in the tube's cap with a sticker
# To each tube, add
## 7.5ul of 2X Hybridization Buffer (vial 5)
## 3ul of Hybridization Component A (vial 6)
# Vortext the mixture for 10s and centrifuge at maximum speed for 10s. I transfer the contents in the tube to 0.2mL Lo-bind PCR tube
# Heat the mixture at 95C for 10min with a heat lid on thermocycler. During this time, I thaw a 4.5ul aliquot of SeqCap Epi probe pool in a 0.2mL PCR tube on ice and spend down
# Centrifuge the heated tubes at maximum speed for 10s at RT.
# Transfer the WGBS library pool/Bisulfite Capture Enhancer/Hybridization Enhancing Oligos/Hybridization Cocktail to the 4.5mL SeqCap Epi probe pool on ice.
# Vortext quickly for 3s and at maximum speed for 10s at RT.
# Incubate on a thermo cycler at 47C for 64-72h. Turn on the thermocycler 's heat lid and set to maintain at 57C (10C above the hybridization temperature).

Revision as of 18:49, 8 November 2014

SeqCap Epi probe pool (UMR v1) hybridization capture on normal and cancer patient WGBS libraries

Back to calendar
SeqCap Epi User Guide

  • Since the kit we purchased contains only SeqCap EZ HE-Oligo Kit A used to block the adaptor region also barcode adaptor of WGBS, I will pool only libraries that have the match barcode in set A

SeqCap EZ HE-Oligo Kit A oligo list

-HE Universal Oligo 1
-HE Index 2 Oligo
-HE Index 4 Oligo
-HE Index 5 Oligo
-HE Index 6 Oligo
-HE Index 7 Oligo
-HE Index 12 Oligo
-HE Index 13 Oligo
-HE Index 14 Oligo
-HE Index 15 Oligo
-HE Index 16 Oligo
-HE Index 18 Oligo
-HE Index 19 Oligo

Part I: Re-amplification of WGBS libraries of normal plasma samples

Link to WGBS library prep of normal plasma sample

  • Most of normal plasma WGBS libraries have very low yield. I need to re-amplify to increase the yield and have some left for future experiment.
  • I did a test on few samples, including NC-7, NC-7, and NC-30, for number of cycle to re-amplify .

Template amount for 30ul run

Sample Conc. (ng/ul) Volume for 3.6ng H2O to 10ul
NC-7 0.47 7.66 2.34
NC-8 1.52 2.37 7.63
NC-30 6.46 0.56 9.44

PCR Mix

Components Conc unit Final conc. unit Volume (ul) 3.5 rxn mix
Purified 1st round DNA 10.00 0.00
5X Phusion HF buffer 5 X 1 X 6.00 21.00
dNTP mix 10 mM 0.25 mM 0.75 2.63
TruS_F/R 10 uM 0.3 uM 0.90 3.15
50X SYBR 50 X 0.4 X 0.24 0.84
Phusion HF 2 unit/ul 0.30 1.05
H2O 11.81 41.34
Total 30.00
- Aliquot 20ul + DNA template with adjusted H2O total 10ul
- Split 9ul 3X
98C for 2min --> [98C for 10sec -> 60C for 30sec -> 72C for 1min] X 5,6,7 cycles --> 72C for 2min
- Added 2ul of 6X loading dye
- Loaded 6ul of PCR and dye mix in 6% TBE gel
File:ZhangLab 2 2014-11-03 13hr 46min test-reamp-wgbs.jpg
  • 6 cycles seemed to be over-amplified either based on gel image or qPCR curve (not shown). I will use the same PCR condition to amplify the rest of libraries with the same template concentration at 5 cycles.
Sample Conc. (ng/ul) Volume for 30ng (ul) Sample H2O to 80 ul
NC-1 0.41 73.17 NC-1 6.83
NC-2 1.39 21.58 NC-2 58.42
NC-3 1.8 16.67 NC-3 63.33
NC-5 0.47 63.83 NC-5 16.17
NC-6 4.25 7.06 NC-6 72.94
NC-7 0.47 63.83 NC-7 16.17
NC-8 1.52 19.74 NC-8 60.26
NC-9 3.72 8.06 NC-9 71.94
NC-12 2.99 10.03 NC-12 69.97
NC-13 1.64 18.29 NC-13 61.71
NC-14 1.28 23.44 NC-14 56.56
NC-15 1.29 23.26 NC-15 56.74
NC-16 1.33 22.56 NC-16 57.44
NC-17 3.86 7.77 NC-17 72.23
NC-18 2.63 11.41 NC-18 68.59
NC-19 0.47 63.83 NC-19 16.17
NC-20 0.4 75.00 NC-20 5.00
NC-21 0.41 73.17 NC-21 6.83
NC-22 2.71 11.07 NC-22 68.93
NC-23 1.76 17.05 NC-23 62.95
NC-24 0.39 76.92 NC-24 3.08
NC-27 6.88 4.36 NC-27 75.64
NC-29 3.59 8.36 NC-29 71.64
NC-30 6.46 4.64 NC-30 75.36

PCR Mix

Components Conc unit Final conc. unit Volume (ul) 25rxn
Purified 1st round DNA 80.00 0.00
5X Phusion HF buffer 5 X 1 X 50.00 1,250.00
dNTP mix 10 mM 0.25 mM 6.25 156.25
TruS_F/R 10 uM 0.3 uM 7.50 187.50
50X SYBR 50 X 0.4 X 2.00 50.00
Phusion HF 2 unit/ul 2.50 62.50
H2O 101.75 2,543.75
Total 250.00
- Aliquot 170ul to each tube + 80 ul of DNA template adjusted volume with H2O
- Split ~60ul 4X in 96-well plate
98C for 2min --> [98C for 10sec -> 60C for 30sec -> 72C for 1min] X 5 cycles --> 72C for 2min
- Purified with 1X diluted AMPure bead (dilute 1:1 with 20% PEG/5N NaCl)
- Elute with 60ul EB Buffer.
  • NOTE: SeqCap experiment requires DNA resuspended in H2O not TE or EB buffer. However, in this case, I plan to pool the library and re-purify with 1 round of the bead agin to completely remove adaptor dimer background and resuspend the pooled libraries with small volume of H2O to reduce evaporation time that will be explained in SeqCap experiment.

Qubit dsDNA HS assay result

Sample Conc. in the Qubit Unit uL used Dilution Conc. Unit Conc. (ng/ul) Yield in 60ul
NC-1 56.4 ng/mL 1.5 133.3 56.4 ng/mL 7.52 451.20
NC-2 53.9 ng/mL 1.5 133.3 53.9 ng/mL 7.19 431.20
NC-3 58.6 ng/mL 1.5 133.3 58.6 ng/mL 7.81 468.80
NC-5 59.5 ng/mL 1.5 133.3 59.5 ng/mL 7.93 476.00
NC-6 49.3 ng/mL 1.5 133.3 49.3 ng/mL 6.57 394.40
NC-7 60.5 ng/mL 1.5 133.3 60.5 ng/mL 8.07 484.00
NC-8 43.2 ng/mL 1.5 133.3 43.2 ng/mL 5.76 345.60
NC-9 49.6 ng/mL 1.5 133.3 49.6 ng/mL 6.61 396.80
NC-12 34.9 ng/mL 1.5 133.3 34.9 ng/mL 4.65 279.20
NC-13 40.7 ng/mL 1.5 133.3 40.7 ng/mL 5.43 325.60
NC-14 34.9 ng/mL 1.5 133.3 34.9 ng/mL 4.65 279.20
NC-15 42.6 ng/mL 1.5 133.3 42.6 ng/mL 5.68 340.80
NC-16 39.6 ng/mL 1.5 133.3 39.6 ng/mL 5.28 316.80
NC-17 42.7 ng/mL 1.5 133.3 42.7 ng/mL 5.69 341.60
NC-18 37.2 ng/mL 1.5 133.3 37.2 ng/mL 4.96 297.60
NC-19 44.5 ng/mL 1.5 133.3 44.5 ng/mL 5.93 356.00
NC-20 48.8 ng/mL 1.5 133.3 48.8 ng/mL 6.51 390.40
NC-21 51.1 ng/mL 1.5 133.3 51.1 ng/mL 6.81 408.80
NC-22 36.6 ng/mL 1.5 133.3 36.6 ng/mL 4.88 292.80
NC-23 41.5 ng/mL 1.5 133.3 41.5 ng/mL 5.53 332.00
NC-24 49.4 ng/mL 1.5 133.3 49.4 ng/mL 6.59 395.20
NC-27 39.5 ng/mL 1.5 133.3 39.5 ng/mL 5.27 316.00
NC-29 41.8 ng/mL 1.5 133.3 41.8 ng/mL 5.57 334.40
NC-30 31.9 ng/mL 1.5 133.3 31.9 ng/mL 4.25 255.20


Part II: Pooling WGBS libraries

Normal control WGBS libraries

  • I pooled the re-amplified libraries as shown above
Sample Conc. (ng/ul) Volume for 100ng (ul) Sample Illumina Index
NC-2 7.19 13.91 NC-2 2
NC-3 7.81 12.80 NC-3 4
NC-5 7.93 12.61 NC-5 5
NC-6 6.57 15.21 NC-6 6
NC-7 8.07 12.40 NC-7 7
NC-12 4.65 21.49 NC-12 13
NC-13 5.43 18.43 NC-13 14
NC-14 4.65 21.49 NC-14 15
NC-15 5.68 17.61 NC-15 16
NC-17 5.69 17.56 NC-17 18
NC-18 4.96 20.16 NC-18 19
NC-21 6.81 14.68 NC-21 12
- Total volume: 198.34ul

Cancer patient WGBS libraries

Sample Conc. (ng/ul) Volume for 100ng (ul) Sample Illumina Index
PC-P-3 13.80 7.25 PC-P-3 2
PC-P-4 9.03 11.07 PC-P-4 4
PC-P-5 8.59 11.64 PC-P-5 5
PC-P-6 11.40 8.77 PC-P-6 6
PC-P-7 12.20 8.20 PC-P-7 7
6-P-1 9.58 10.44 6-P-1 13
6-P-2 12.60 7.94 6-P-2 14
6-P-3 6.16 16.23 6-P-3 15
6-P-4 10.40 9.62 6-P-4 16
6-P-10 6.76 14.79 6-P-10 18
6-P-8 7.71 12.97 6-P-8 19
7-P-2 8.67 11.53 7-P-2 12
- Total volume: 130.45ul
- Re-purified the two pools with 1X AMOPure bead
- Resuspended each library with 33ul H2O
- Measure conc. with Qubit dsDNA HS assay using 1ul of purified library pool. Total volume left ~32ul
- Mormal WGBS library pool: conc. = 32.9ng/ul --> total amount in 32ul = 1052.8ng
- Cancer patient WGBS library pool: conc. = 30.80ng/ul --> total amount in 32ul = 985.6 ng
- The total amount of the two library pools is close to 1ug as recommended by User guide.
- Continue to CapSeq hybridization capture


Part III: SeqCap hybridization capture

  • Followed exactly the instruction describe in the User Guide page 22-24

Step 1. Preparing for hybridization

  1. Turn on a heat block to 95C. I use thermocycler to heat DNA mix at step 4.9 as I transfer the DNA mix from 1.5mL tube to 0.2ul PCR tube.


Step 2. Resuspend the SeqCap HE Universal and SeqCap HE Index Oligos

  • I prepare this step in the first time I open the kit
  • We have HE Oligo Index set A
  1. Spin the lyophilized oligo tubes, contained in the SeqCap HE-Oligo KitA briefly to allow the contents to pellet to the bottom of the tube.
  2. Add 120ul PCR-grade H2O to SeqCap HE Universal Oligo tube (1000uM final concentration).
  3. Add 10ul PCR-grade H2O to SeqCap HE Index Oligo tube (1000uM final concentration).
  4. Vortex the oligos plus H2O for 5s and spin down the resuspended oligo tube.
  5. After use, they should be stored at -15 to -25C


Step 3. Prepare the bisulfite-converted DNA sample library and HE oligos for hybridization

  1. Have ~1ug of the WGBS library pool in a Lo-bind 1.5 mL tube prepare above, including normal control WGBS library pool and cancer patient WGBS library pool
  2. Thaw the resuspended SeqCap HE Universal Oligos (1000uM) and the resuspended SeqCap HE Index Oligo (1000uM) that matches the DNA adaptor index in the WGBS library preparation
- In this experiment, I pooled all libraries using barcode adaptor match with all 12 indexes in HE-Oligo KitA (0.8ul each). I pool the same amount of the 12 indexes in kit A and use 1ul of the pooled oligos in step 4.3


Step 4. Prepare the hybridization samples

  1. Add 10ul of Bisulfite Capture Enhancer (found in the SeqCap Epi Accessary Kit) to a new Lo-bind 1.5 mL tube
  2. Add 1ug of WGBS library pool
  3. Add 1,000pmol SeqCap HE Universal Oligo 1 and 1,000pmol of the 1000uM SeqCap HE Index Oligo SetA as described above.
    1. This equal to 1ul of 1,000uM of oligos
  4. Close the tube and make a hole in the top of the tube's cap with an 20 gauge needle (I poked many holes)
  5. Dry the mixture of WGBS library pool/Bisulfite Capture Enhancer/Hybridization Enhancing Oligos in a vacuum concentrator on high heat 60C for ~15-20min until it dry up. A little liquid left in the tube between 1-2ul should be fine to prevent over dry.
  6. Cover the holes in the tube's cap with a sticker
  7. To each tube, add
    1. 7.5ul of 2X Hybridization Buffer (vial 5)
    2. 3ul of Hybridization Component A (vial 6)
  8. Vortext the mixture for 10s and centrifuge at maximum speed for 10s. I transfer the contents in the tube to 0.2mL Lo-bind PCR tube
  9. Heat the mixture at 95C for 10min with a heat lid on thermocycler. During this time, I thaw a 4.5ul aliquot of SeqCap Epi probe pool in a 0.2mL PCR tube on ice and spend down
  10. Centrifuge the heated tubes at maximum speed for 10s at RT.
  11. Transfer the WGBS library pool/Bisulfite Capture Enhancer/Hybridization Enhancing Oligos/Hybridization Cocktail to the 4.5mL SeqCap Epi probe pool on ice.
  12. Vortext quickly for 3s and at maximum speed for 10s at RT.
  13. Incubate on a thermo cycler at 47C for 64-72h. Turn on the thermocycler 's heat lid and set to maintain at 57C (10C above the hybridization temperature).