A diverse gut virome from Drosophila melanogaster
Ansari, M. H.; Staubach, F.; Alacatli, N.; Obbard, D. J.
Show abstract
Drosophila melanogaster is not only one of the most important models of antiviral immunity in invertebrates, but is also a powerful model for research of the gut microbiome. Although recent studies have continued to improve our knowledge of the fly gut microbiota, the viral component of the microbiome has remained unexplored. Here we explore the viral component of the Drosophila melanogaster gut microbiome using deep metagenomic DNA sequencing. We recovered 3035 phage sequences, resulting in 167 viral Metagenome-Assembled Genomes. The majority of these sequences are potentially novel bacteriophages from the order Caudovirales, which mainly target major gut bacteria of D. melanogaster, including Lactobacillus, Acetobacter, and Gluconobacter. Our functional annotation and discovery of auxiliary metabolic genes showed that these bacteriophages have the potential to influence microbial metabolism and genetic information processing. We also identified evidence of known fly pathogens Drosophila Kallithea nudivirus, Vesanto bidna-like virus, and Viltain densovirus, some of which were common in our studied populations. Our findings reveal a complex and diverse phage community in the D. melanogaster gut microbiome, paving the way to study host-phage related research in the natural microbial communities.
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