Detection and Mitigation of Spurious Antisense Reads with RoSA

Detection and Mitigation of Spurious Antisense Reads with RoSA
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使用 RoSA 检测和减少虚假反义读取

DOI:
10.1101/425900
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发表时间:
2018
期刊:
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影响因子:
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通讯作者:
Mourão K
Mourão K
中科院分区:
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文献类型:
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作者:
Mourão K

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MotivationAntisense transcription is known to have a range of impacts on sense gene expression, including (but not limited to) impeding transcription initiation, disrupting post-transcriptional processes, and enhancing, slowing, or even preventing transcription of the sense gene. Strand-specific RNA-Seq protocols preserve the strand information of the original RNA in the data, and so can be used to identify where antisense transcription may be implicated in regulating gene expression. However, our analysis of 199 strand-specific RNA-Seq experiments reveals that spurious antisense reads are often present in these datasets at levels greater than 1% of sense gene expression levels. Furthermore, these levels can vary substantially even between replicates in the same experiment, potentially disrupting any downstream analysis, if the incorrectly assigned antisense counts dominate the set of genes with high antisense transcription levels. Currently, no tools exist to detect or correct for this spurious antisense signal.ResultsOur tool, RoSA (Removal of Spurious Antisense), detects the presence of high levels of spurious antisense read alignments in strand-specific RNA-Seq datasets. It uses incorrectly spliced reads on the antisense strand and/or ERCC spike-ins (if present in the data) to calculate both global and gene-specific antisense correction factors. We demonstrate the utility of our tool to filter out spurious antisense transcript counts in anArabidopsis thalianaRNA-Seq experiment.AvailabilityRoSA is open source software available under the GPL licence via the Barton Group GitHub page https://github.com/bartongroup.Contactg.j.barton@dundee.ac.uk, g.g.simpson@dundee.ac.uk
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