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Analysis pipeline to detect germline or somatic variants (pre-processing, variant calling and annotation) from WGS / targeted sequencing

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nf-core/sarek

An open-source analysis pipeline to detect germline or somatic variants from whole genome or targeted sequencing

Nextflow nf-core DOI

GitHub Actions CI status GitHub Actions Linting status CircleCi build status

install with bioconda Docker Get help on Slack

Introduction

Sarek is a workflow designed to detect variants on whole genome or targeted sequencing data. Initially designed for Human, and Mouse, it can work on any species with a reference genome. Sarek can also handle tumour / normal pairs and could include additional relapses.

The pipeline is built using Nextflow, a workflow tool to run tasks across multiple compute infrastructures in a very portable manner. It comes with Docker containers making installation trivial and results highly reproducible.

It's listed on Elixir - Tools and Data Services Registry and Dockstore.

Quick Start

  1. Install Nextflow (>=20.04.0)

  2. Install any of Docker, Singularity, Podman, Shifter or Charliecloud for full pipeline reproducibility (please only use Conda as a last resort; see docs)

  3. Download the pipeline and test it on a minimal dataset with a single command:

    nextflow run nf-core/sarek -profile test,<docker/singularity/podman/shifter/charliecloud/conda/institute>

    Please check nf-core/configs to see if a custom config file to run nf-core pipelines already exists for your Institute. If so, you can simply use -profile <institute> in your command. This will enable either Docker or Singularity and set the appropriate execution settings for your local compute environment.

  4. Start running your own analysis!

    nextflow run nf-core/sarek -profile <docker/singularity/podman/shifter/charliecloud/conda/institute> --input '*.tsv' --genome GRCh38

See usage docs for all of the available options when running the pipeline.

Pipeline Summary

By default, the pipeline currently performs the following:

  • Sequencing quality control (FastQC)
  • Map Reads to Reference (BWA mem)
  • Mark Duplicates (GATK MarkDuplicatesSpark)
  • Base (Quality Score) Recalibration (GATK BaseRecalibrator, GATK ApplyBQSR)
  • Preprocessing quality control (samtools stats)
  • Preprocessing quality control (Qualimap bamqc)
  • Overall pipeline run summaries (MultiQC)

Documentation

The nf-core/sarek pipeline comes with documentation about the pipeline: usage and output.

Credits

Sarek was developed at the National Genomics Infastructure and National Bioinformatics Infastructure Sweden which are both platforms at SciLifeLab, with the support of The Swedish Childhood Tumor Biobank (Barntumörbanken). QBiC later joined and helped with further development.

Main authors:

Helpful contributors:

Contributions & Support

If you would like to contribute to this pipeline, please see the contributing guidelines.

For further information or help, don't hesitate to get in touch on the Slack #sarek channel (you can join with this invite), or contact us: Maxime Garcia, Szilvester Juhos

CHANGELOG

Acknowledgements

Barntumörbanken SciLifeLab
National Genomics Infrastructure National Bioinformatics Infrastructure Sweden
QBiC

Citations

If you use nf-core/sarek for your analysis, please cite the Sarek article as follows:

Garcia M, Juhos S, Larsson M et al. Sarek: A portable workflow for whole-genome sequencing analysis of germline and somatic variants [version 2; peer review: 2 approved] F1000Research 2020, 9:63 doi: 10.12688/f1000research.16665.2.

You can cite the sarek zenodo record for a specific version using the following doi: 10.5281/zenodo.3476426

In addition, references of tools and data used in this pipeline can be found in the CITATIONS.md file.

You can cite the nf-core publication as follows:

The nf-core framework for community-curated bioinformatics pipelines.

Philip Ewels, Alexander Peltzer, Sven Fillinger, Harshil Patel, Johannes Alneberg, Andreas Wilm, Maxime Ulysse Garcia, Paolo Di Tommaso & Sven Nahnsen.

Nat Biotechnol. 2020 Feb 13. doi: 10.1038/s41587-020-0439-x.

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Analysis pipeline to detect germline or somatic variants (pre-processing, variant calling and annotation) from WGS / targeted sequencing

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