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Haploflow: Strain-resolved de novo assembly of viral genomes

Publication

Date: 26th January 2021 | Source: BioRxiv

Authors: A. Fritz, A. Bremges, Z.-L. Deng, T.-R. Lesker, J. Götting, T. Ganzenmüller, A. Sczyrba, A. Dilthey, F. Klawonn, A.C. McHardy.

In viral infections often multiple related viral strains are present, due to coinfection or within-host evolution. We describe Haploflow, a de Bruijn graph-based assembler for de novo genome assembly of viral strains from mixed sequence samples using a novel flow algorithm. We assessed Haploflow across multiple benchmark data sets of increasing complexity, showing that Haploflow is faster and more accurate than viral haplotype assemblers and generic metagenome assemblers not aiming to reconstruct strains. Haplotype reconstructed high-quality strain-resolved assemblies from clinical HCMV samples and SARS-CoV-2 genomes from wastewater metagenomes identical to genomes from clinical isolates.

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