Karect: accurate correction of substitution, insertion and deletion errors for next-generation sequencing data

Amin Allam, Panos Kalnis, Victor Solovyev

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Motivation: Next-generation sequencing generates large amounts of data affected by errors in the form of substitutions, insertions or deletions of bases. Error correction based on the high-coverage information, typically improves de novo assembly. Most existing tools can correct substitution errors only; some support insertions and deletions, but accuracy in many cases is low. Results: We present Karect, a novel error correction technique based on multiple alignment. Our approach supports substitution, insertion and deletion errors. It can handle non-uniform coverage as well as moderately covered areas of the sequenced genome. Experiments with data from Illumina, 454 FLX and Ion Torrent sequencing machines demonstrate that Karect is more accurate than previous methods, both in terms of correcting individual-bases errors (up to 10% increase in accuracy gain) and post de novo assembly quality (up to 10% increase in NGA50). We also introduce an improved framework for evaluating the quality of error correction.
Original languageEnglish (US)
Pages (from-to)3421-3428
Number of pages8
JournalBioinformatics
Volume31
Issue number21
DOIs
StatePublished - Jul 14 2015

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