Grape RNA-Seq analysis pipeline environment

TitleGrape RNA-Seq analysis pipeline environment
Publication TypeJournal Article
Year of Publication2013
AuthorsKnowles D, Röder M, Merkel A, Guigó R
Date PublishedJan

MOTIVATION: The avalanche of data arriving since the development of next generation sequencing (NGS) technologies has prompted the need for developing fast, accurate, and easily automated bioinformatic tools capable of dealing with massive datasets. Among the most productive applications of NGS technologies is the sequencing of cellular RNA, known as RNA-Seq. While RNA-Seq provides similar or superior dynamic range than microarrays at similar or lower cost, the lack of standard and user-friendly pipelines is a bottleneck preventing RNA-Seq from becoming the standard for transcriptome analysis. RESULTS: In this work we present a pipeline for processing and analyzing RNA-Seq data, that we have named Grape (Grape RNA-Seq Analysis Pipeline Environment). Grape supports raw sequencing reads produced by a variety of technologies, either in Fasta or FastQ format, or as prealigned reads in SAM/BAM format. A minimal Grape configuration consists of the file location of the raw sequencing reads, the genome of the species, and the corresponding gene and transcript annotation.Grape first runs a set of quality control (QC) steps, and then aligns the reads to the genome, a step that is omitted for prealigned read formats. Grape next estimates gene and transcript expression levels, calculates exon inclusion levels, and identifies novel transcripts.Grape can be run on a single computer or in parallel on a computer cluster. It is distributed with specific mapping and quantification tools, but given its modular design, any tool supporting popular data inter-change formats, can be integrated. AVAILABILITY: Grape can be obtained from the Bioinformatics and Genomics website at: ''. CONTACT: