Original title: CheckV assesses the quality and completeness of metagenome-assembled viral genomes
A metagenomeGenetic material collected from a sample containing many organisms, rather than from one organism alone. contains genetic material collected from many organisms in an environment, including viruses. Some viral sequences are complete genomes, while others are fragments or include nearby host DNA. CheckV compares a sequence with a database of complete viral genomes to estimate how much of the virus genome is present, and it can identify closed genomes and remove flanking host regions from integrated viruses. The authors found that most sequences they examined were small fragments, and that removing host DNA improved the identification of viral genes linked to metabolism.
Imagine sorting a pile of jigsaw pieces after someone has mixed in pieces from another puzzle. Some pieces form a whole picture, while others are only scraps, and the wrong puzzle pieces can make the picture misleading. In this paper, the pile is a collection of viral sequences, the complete picture is a full viral genome, and CheckV estimates how much of that picture is present while removing pieces from the host.
Researchers use viral sequences to study viruses and the functions they may carry, but fragments and attached host DNA can mislead them. CheckV helps assess genome completeness and remove host contamination, improving the identification of viral genes and the interpretation of viral functions.
The abstract does not establish how accurately CheckV performs in every setting or for every type of viral sequence. It reports validation on mock datasets, comparison with existing methods, and applications to particular large collections, but gives no detailed accuracy measures or broader assessment of downstream biological conclusions.
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CheckV assesses the quality and completeness of metagenome-assembled viral genomes — Stephen Nayfach, Antônio Pedro Camargo, Frederik Schulz et al. — Nature Biotechnology — doi:10.1038/s41587-020-00774-7
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.