- Materials
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- Direct RNA Sequencing Kit (SQK-RNA004)
- Consumables
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- Induro® Reverse Transcriptase (NEB, M0681)
- 10 mM dNTP solution (e.g. NEB, cat # N0447)
- NEBNext® Quick Ligation Reaction Buffer (NEB, B6058)
- T4 DNA Ligase 2M U/ml (NEB, cat # M0202M)
- Murine RNase Inhibitor (NEB, M0314)
- Agencourt RNAClean XP beads (Beckman Coulter™, cat # A63987)
- Nuclease-free water (e.g. ThermoFisher, AM9937)
- Freshly prepared 70% ethanol in nuclease-free water
- 0.2 ml thin-walled PCR tubes
- 1.5 ml Eppendorf DNA LoBind tubes
- Qubit RNA HS Assay Kit (ThermoFisher, cat # Q32852)
- Qubit 1x dsDNA HS Assay Kit (ThermoFisher, Q33230)
- Qubit™ Assay Tubes (Invitrogen, Q32856)
- Equipment
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- Hula mixer (gentle rotator mixer)
- Magnetic rack, suitable for 1.5 ml Eppendorf tubes
- Microfuge
- Vortex mixer
- Ice bucket with ice
- Timer
- Thermal cycler
- Qubit fluorometer (or equivalent for QC check)
- P1000 pipette and tips
- P200 pipette and tips
- P100 pipette and tips
- P20 pipette and tips
- P10 pipette and tips
- P2 pipette and tips
- Eppendorf 5424 centrifuge (or equivalent)
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For this protocol, you will need the RNA Control Strand (RCS) supplied in the Direct RNA Sequencing Kit.
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Input RNA
It is important that the input RNA meets the quantity and quality requirements. Using too little or too much RNA, or RNA of poor quality (e.g. fragmented or containing chemical contaminants) can affect your library preparation.
For instructions on how to perform quality control of your RNA sample, please read the Input DNA/RNA QC protocol.
For further information on using RNA as input, please read the links below.
- Polyadenylation of non-poly(A) transcripts using E. coli poly(A) polymerase
- RNA contaminants
- RNA stability
- RNA Integrity Number (RIN)
- Enrichment of polyadenylated RNA molecules
These documents can also be found in the DNA/RNA Handling page.
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Third-party reagents
We have validated and recommend the use of all the third-party reagents used in this protocol. Alternatives have not been tested by Oxford Nanopore Technologies.
For all third-party reagents, we recommend following the manufacturer's instructions to prepare the reagents for use.
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Check your flow cell
We highly recommend that you check the number of pores in your flow cell prior to starting a sequencing experiment. This should be done within three months of purchasing for MinION/GridION/PromethION or within four weeks of purchasing Flongle Flow Cells. Oxford Nanopore Technologies will replace any flow cell with fewer than the number of pores in the table below, when the result is reported within two days of performing the flow cell check, and when the storage recommendations have been followed. To do the flow cell check, please follow the instructions in the Flow Cell Check document.
Flow cell Minimum number of active pores covered by warranty Flongle Flow Cell 50 MinION/GridION Flow Cell 800 PromethION Flow Cell 5000 -
Direct RNA Sequencing Kit (SQK-RNA004) contents:
Name Acronym Cap colour No. of vials Fill volume per vial (μl) RT Adapter RTA Blue 1 10 RNA Ligation Adapter RLA Green 1 45 RNA CS RCS Yellow 1 25 Wash Buffer WSB Orange 2 1,200 RNA Elution Buffer REB Black 1 300 Library Solution LIS White cap, pink label 1 600 Sequencing Buffer SB Red 1 700 RNA Flush Tether RFT Pink 1 200 Flow Cell Flush FCF White 1 8,000 Note: The RNA CS (RCS) is the calibration strand and contains the Enolase II from YHR174W, extracted from the yeast saccharomyces cerevisiae. The reference FASTA files for the yeast is available here.