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Nano-GLADIATOR: real-time detection of copy number alterations from nanopore sequencing data


Motivation
The past few years have seen the emergence of nanopore-based sequencing technologies which interrogate single molecule of DNA and generate reads sequentially.

Results
In this paper we demonstrate that, thanks to the sequentiality of the nanopore process, the data generated in the first tens of minutes of a typical MinION/GridION run can be exploited to resolve the alterations of a human genome at a karyotype level with a resolution in the order of tens of Mb, while the data produced in the first 6-12 hours allow to obtain a resolution comparable to currently available arraybased technologies, and thanks to a novel probabilistic approach are capable to predict the allelic fraction of genomic alteration with high accuracy. To exploit the unique characteristics of nanopore sequencing data we developed a novel software tool, Nano-GLADIATOR, that is capable to perform CNVs/CNAs detection and allelic fraction prediction during the sequencing run ("On-line" mode) and after experiment completion ("Off-line" mode). We tested Nano-GLADIATOR on publicly available ("Off-line" mode) and on novel WGS dataset generated with MinION device ("On-line" mode) showing that our tool is capable to perform realtime CNAs detection obtaining good results with respect to other state of the art tools.

Availability
Nano-GLADIATOR is freely available at https://sourceforge.net/projects/nanogladiator/.

Authors: Alberto Magi, Davide Bolognini, Niccoló Bartalucci, Alessandra Mingrino, Roberto Semeraro, Luna Giovannini, Stefania Bonifacio, Daniela Parrini, Elisabetta Pelo, Francesco Mannelli, Paola Guglielmelli, Alessandro Maria Vannucchi

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