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Shallow nanopore RNA sequencing enables transcriptome profiling for precision cancer medicine (Hipo_021)

Type: Cancer Genomics
Archiver: European Genome-Phenome Archive (EGA)

5 Datasets 1 Publication

Click on a Dataset ID in the table below to learn more, and to find out who to contact about access to these data

Dataset ID	Description	Technology	Samples
EGAD00001008969	Reads were processed with the RNA-seq workflow 1.3.0 developed by the DKFZ Omics IT and Data Management Core Facility (https://github.com/DKFZ-ODCF/RNAseqWorkflow). First, FASTQ reads were aligned via two-pass alignment using STAR 2.5.3a. The STAR index was generated from the 1000 Genomes assembly and GENCODE Version 19 gene models with a sjdbOverhang of 200. Duplicate marking of the resultant main alignment file was done with sambamba 0.6.5. Gene-specific read counting was performed using featureCounts (from Subread 1.5.1) over exon features based on GENCODE Version 19 gene models. Both reads of a paired fragment were used for counting, and the quality threshold was set to 255, indicating that STAR found a unique alignment. Strand-specific counting was also used. For RPKM and TPM calculations, all genes on chromosomes X and Y, the mitochondrial genome, as well as rRNA and tRNA genes were omitted as they are likely to introduce library size estimation biases.		10
EGAD00001008970	Nanopore RNA Sequencing was done for 10 tumor samples. Direct cDNA sequencing was performed using the SQK-DCS109 kit (Oxford Nanopore Technologies). For analysis of a single sample on a MinION flow cell (version R9.4.1), 5 μg RNA was used as input. For multiplexing on a MinION flow cell, 2.5 μg RNA per sample was used as input, and the native barcoding expansion kit EXP-NBD104 was employed in conjunction with SQK-DCS109. After reverse transcription with Maxima H Minus Reverse Transcriptase (Thermo Scientific), second-strand synthesis was performed using the 2x LongAmp Taq Master Mix (New England Biolabs). The resulting double-stranded cDNA was subjected to end-repair and dA-tailing using the NEBNext Ultra End Repair/dA-Tailing Module (New England Biolabs). For multiplexed libraries, this step was followed by barcode ligation and library pooling. Next, libraries were quantified with a Qubit Fluorometer 3.0 (Life Technologies). Finally, sequencing adapters were added to the library preparations and ligated with Blunt/TA Ligase Master Mix (New England Biolabs), followed by further quality control using a Qubit. Samples ACC1 and ACC2 were analyzed on individual MinION flow cells, while the remaining eight samples were sequenced as multiplexed libraries on two MinION flow cells by pooling four samples for each run. Five ACC samples were also analyzed individually on Flongle flow cells	MinION	10
EGAD00001008971	Fastq files of paired RNA-Seq of 10 different tumor samples, for which Nanopore and Illumina sequencing was compared. Illumina sequencing was carried out with HiSeq4000 or HiSeq X-Ten using the Illumina TruSeq stranded mRNA Kit.	HiSeq X Ten Illumina HiSeq 4000	10
EGAD00001009689	FAST5 original nanopore data from MinION sequencing of 10 tumor samples		10
EGAD00001009690	Reads were aligned to 1000 Genomes assembly reference (hs37d5) using minimap2 2.22. SAM-to-BAM conversion, BAM sorting and indexing were performed with SAMtools 1.13. Read summarization was performed with featureCounts (from Subread 2.0.3) over exon features based on GENCODE Version 19 gene models. Strand specific counting was used.		10

Publications	Citations
Transcriptome profiling for precision cancer medicine using shallow nanopore cDNA sequencing. Mock A, Braun M, Scholl C, Fröhling S, Erkut C. Sci Rep 13: 2023 2378	4