Arichard:Protocols/CEL Seq
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CEL-Seq protocol validation
- Protocol modified to use common sequence primer with Illumina 5' Adapter and T7 promoter (CS-5primeAD-T7).
- 100 ng/ul total RNA will be used as input (from Rui).
- I will work with 16 tubes at a time.
- For one set of 16 tubes, I want 2 x 1 ng rxns (+ control), 12 x 100 pg rxns (experimental), and 2 x no RNA (no template controls, NTC).
- For the second set of 16, I want 2 x 100 pg rxns (+ control), 12 x 10 pg rxns (experimental, approx. single cell amount), and 2 x no RNA (NTCs).
- Keep all RNA on ice at all times.
- Work in the hood. EtOH, RNase away, and UV treat all surfaces and tools. UV treat water for dilutions.
- Use low-bind tubes.
Prep
Dilute RT primers to appropriate concentrations
- Dilute primers to 32 pmol/ul, 3.2 pmol/ul, and 0.32 pmol/ul, depending on input (Note that each primer must be diluted separately for each sample):
- Add 16 ul of 100 pmol/ul primer to 84 ul H2O --> 100 ul 32 pmol/ul primer. Use 0.5 ul of this per 1 ng total RNA.
- Add 10 ul of 32 pmol/ul primer to 90 ul H2O --> 100 ul 3.2 pmol/ul primer. Use 0.5 ul of this per 100 pg total RNA.
- Add 10 ul of 3.2 pmol/ul primer to 90 ul H2O --> 100 ul 0.32 pmol/ul primer. Use 0.5 ul of this per 10 pg total RNA.
- See diluted RT primer layout.
Dilute total RNA to 2 ng/ul, on ice
- Add 1 ul 100 ng/ul RNA to 9 ul H2O --> 10 ul 10 ng/ul RNA.
- Add 2 ul 10 ng/ul RNA to 8 ul of H2O --> 10 ul 2 ng/ul RNA.
- Store all at -80 degC.
Dilute ERCC RNA Spike-in Control to 1:10,000, on ice
- Add 1 ul of undiluted ERCC to 9 ul H2O --> 10 ul 1:10 ERCC.
- Add 1 ul of 1:10 ERCC to 9 ul H2O --> 10 ul 1:100 ERCC.
- Add 1 ul of 1:100 ERCC to 9 ul H2O --> 10 ul 1:1000 ERCC.
- Add 1 ul of 1:1000 ERCC to 9 ul H2O --> 10 ul 1:10000 ERCC.
- Store all at -80 degC.
Mix total RNA and ERCC RNA Spike-in Control
- Add 5 ul 2 ng/ul RNA to 2 ul 1:10000 ERCC --> 7 ul 1.42 ng/ul RNA 1:35000 ERCC.
- Add 0.7 ul of this to 0.5 ul 32 pmol/ul primer for 1 ng total RNA samples.
- Need total of 2 x 0.7 ul + 2 ul for dilution to 142 pg/ul RNA 1:350000 ERCC = 3.4 ul.
- Add 2 ul 1.42 ng/ul RNA 1:35000 ERCC to 18 ul H2O --> 20 ul 142 pg/ul RNA 1:350000 ERCC.
- Add 0.7 ul of this to 0.5 ul 3.2 pmol/ul primer for 100 pg total RNA samples.
- Need 14 x 0.7 ul + 1 ul for dilution to 14.2 pg/ul RNA 1:3500000 ERCC = 10.8 ul.
- Add 1 ul 142 pg/ul RNA 1:350000 ERCC to 9 ul H2O --> 10 ul 14.2 pg/ul RNA 1:3500000 ERCC.
- Add 0.7 ul of this to 0.5 ul 0.32 pmol/ul primer for 10 pg samples.
- Need 12 x 0.7 ul = 8.4 ul.
Protocol
RT reaction, first strand
- On ice block, add 0.5 ul of each RT primer at appropriate concentration (see prep above) to each tube.
- Add 0.7 ul of each sample/ERCC mixture to respective tubes.
- Flick and spin tubes to collect, then return to ice block.
- Incubate 10 min at 70 degC to anneal RT primers.
- Add 0.8 ul of RT mix per rxn:
- 0.2 ul 10X first strand buffer.
- 0.4 ul dNTP mix.
- 0.1 ul RNase inhibitor.
- 0.1 ul ArrayScript.
- Flick and spin tubes to collect, then return to ice block.
- Incubate 2 hrs at 42 degC for RT rxn.
- Move tubes to ice block and add 8 ul of second strand mix per rxn: