Motivation: Although many next-generation sequencing (NGS) read preprocessing tools already existed, we could not find any tool or combination of tools that met our requirements in terms of flexibility, correct handling of paired-end data and high performance. We have developed Trimmomatic as a more flexible and efficient preprocessing tool, which could correctly handle paired-end data.Results: The value of NGS read preprocessing is demonstrated for both reference-based and reference-free tasks. Trimmomatic is shown to produce output that is at least competitive with, and in many cases superior to, that produced by other tools, in all scenarios tested.Availability and implementation: Trimmomatic is licensed under GPL V3. It is cross-platform (Java 1.5+ required) and available at http://www.usadellab.org/cms/index.php?page=trimmomaticContact:
usadel@bio1.rwth-aachen.deSupplementary information:
Supplementary data are available at Bioinformatics online.
Mitochondria and plastids (chloroplasts) are cell organelles of endosymbiotic origin that possess their own genetic information. Most organellar DNAs map as circular double-stranded genomes. Across the eukaryotic kingdom, organellar genomes display great size variation, ranging from ∼15 to 20 kb (the size of the mitochondrial genome in most animals) to >10 Mb (the size of the mitochondrial genome in some lineages of flowering plants). We have developed OrganellarGenomeDraw (OGDRAW), a suite of software tools that enable users to create high-quality visual representations of both circular and linear annotated genome sequences provided as GenBank files or accession numbers. Although all types of DNA sequences are accepted as input, the software has been specifically optimized to properly depict features of organellar genomes. A recent extension facilitates the plotting of quantitative gene expression data, such as transcript or protein abundance data, directly onto the genome map. OGDRAW has already become widely used and is available as a free web tool (http://ogdraw.mpimp-golm.mpg.de/). The core processing components can be downloaded as a Perl module, thus also allowing for convenient integration into custom processing pipelines.
Mitochondria and plastids are DNA-containing cell organelles whose genomes occur at high copy numbers per cell. Organellar genomes vary greatly in size ranging from approximately 15 kb for some animal mitochondrial genomes to more than 2 Mb for some plant mitochondrial genomes. The vast majority of organellar genomes map as circular molecules that are difficult to illustrate by available commercial or free software tools. Thus, published genome maps are extremely heterogeneous in design, often tediously drawn semi-manually and lack any consensus in display. Here, we present a new web-based tool, OrganellarGenomeDRAW (OGDRAW), which produces high-resolution custom graphical maps of DNA sequences as stored in standard GenBank format entries. GenBank data can be provided as either file uploads or accession numbers. The program is specially optimized for the display of chloroplast and mitochondrial genomes but can also be used to depict other circular DNA sequences. The design of the program core as a Perl module with an object-oriented interface allows easy integration into custom scripts.
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