MacSyFinder: a program to mine genomes for molecular systems with an application to CRISPR-Cas systems. - Archive ouverte HAL Access content directly
Journal Articles PLoS ONE Year : 2013

MacSyFinder: a program to mine genomes for molecular systems with an application to CRISPR-Cas systems.

Sophie S Abby
Bertrand Néron
Hervé Ménager
Marie Touchon
Eduardo P C Rocha

Abstract

Biologists often wish to use their knowledge on a few experimental models of a given molecular system to identify homologs in genomic data. We developed a generic tool for this purpose. Macromolecular System Finder (MacSyFinder) provides a flexible framework to model the properties of molecular systems (cellular machinery or pathway) including their components, evolutionary associations with other systems and genetic architecture. Modelled features also include functional analogs, and the multiple uses of a same component by different systems. Models are used to search for molecular systems in complete genomes or in unstructured data like metagenomes. The components of the systems are searched by sequence similarity using Hidden Markov model (HMM) protein profiles. The assignment of hits to a given system is decided based on compliance with the content and organization of the system model. A graphical interface, MacSyView, facilitates the analysis of the results by showing overviews of component content and genomic context. To exemplify the use of MacSyFinder we built models to detect and class CRISPR-Cas systems following a previously established classification. We show that MacSyFinder allows to easily define an accurate "Cas-finder" using publicly available protein profiles. MacSyFinder is a standalone application implemented in Python. It requires Python 2.7, Hmmer and makeblastdb (version 2.2.28 or higher). It is freely available with its source code under a GPLv3 license at https://github.com/gem-pasteur/macsyfinder. It is compatible with all platforms supporting Python and Hmmer/makeblastdb. The "Cas-finder" (models and HMM profiles) is distributed as a compressed tarball archive as Supporting Information.
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Dates and versions

pasteur-01080418 , version 1 (23-01-2015)

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Sophie S Abby, Bertrand Néron, Hervé Ménager, Marie Touchon, Eduardo P C Rocha. MacSyFinder: a program to mine genomes for molecular systems with an application to CRISPR-Cas systems.. PLoS ONE, 2013, 9 (10), pp.e110726. ⟨10.1371/journal.pone.0110726⟩. ⟨pasteur-01080418⟩

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