Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids
Abstract Background Most phages infect free-living bacteria but a few have been identified that infect heritable symbionts of insects or other eukaryotes. Heritable symbionts are usually specialized and isolated from other bacteria with little known about the origins of associated phages. Hamiltonel...
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oai:doaj.org-article:11600e04f127422f826f3c54fef16d862021-11-14T12:05:22ZEvolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids10.1186/s12985-021-01685-y1743-422Xhttps://doaj.org/article/11600e04f127422f826f3c54fef16d862021-11-01T00:00:00Zhttps://doi.org/10.1186/s12985-021-01685-yhttps://doaj.org/toc/1743-422XAbstract Background Most phages infect free-living bacteria but a few have been identified that infect heritable symbionts of insects or other eukaryotes. Heritable symbionts are usually specialized and isolated from other bacteria with little known about the origins of associated phages. Hamiltonella defensa is a heritable bacterial symbiont of aphids that is usually infected by a tailed, double-stranded DNA phage named APSE. Methods We conducted comparative genomic and phylogenetic studies to determine how APSE is related to other phages and prophages. Results Each APSE genome was organized into four modules and two predicted functional units. Gene content and order were near-fully conserved in modules 1 and 2, which encode predicted DNA metabolism genes, and module 4, which encodes predicted virion assembly genes. Gene content of module 3, which contains predicted toxin, holin and lysozyme genes differed among haplotypes. Comparisons to other sequenced phages suggested APSE genomes are mosaics with modules 1 and 2 sharing similarities with Bordetella-Bcep-Xylostella fastidiosa-like podoviruses, module 4 sharing similarities with P22-like podoviruses, and module 3 sharing no similarities with known phages. Comparisons to other sequenced bacterial genomes identified APSE-like elements in other heritable insect symbionts (Arsenophonus spp.) and enteric bacteria in the family Morganellaceae. Conclusions APSEs are most closely related to phage elements in the genus Arsenophonus and other bacteria in the Morganellaceae.Bret M. BoydGermain ChevignonVilas PatelKerry M. OliverMichael R. StrandBMCarticleVirusBacteriaMutualismAphidParasitoidInfectious and parasitic diseasesRC109-216ENVirology Journal, Vol 18, Iss 1, Pp 1-18 (2021) |
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Virus Bacteria Mutualism Aphid Parasitoid Infectious and parasitic diseases RC109-216 |
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Virus Bacteria Mutualism Aphid Parasitoid Infectious and parasitic diseases RC109-216 Bret M. Boyd Germain Chevignon Vilas Patel Kerry M. Oliver Michael R. Strand Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
description |
Abstract Background Most phages infect free-living bacteria but a few have been identified that infect heritable symbionts of insects or other eukaryotes. Heritable symbionts are usually specialized and isolated from other bacteria with little known about the origins of associated phages. Hamiltonella defensa is a heritable bacterial symbiont of aphids that is usually infected by a tailed, double-stranded DNA phage named APSE. Methods We conducted comparative genomic and phylogenetic studies to determine how APSE is related to other phages and prophages. Results Each APSE genome was organized into four modules and two predicted functional units. Gene content and order were near-fully conserved in modules 1 and 2, which encode predicted DNA metabolism genes, and module 4, which encodes predicted virion assembly genes. Gene content of module 3, which contains predicted toxin, holin and lysozyme genes differed among haplotypes. Comparisons to other sequenced phages suggested APSE genomes are mosaics with modules 1 and 2 sharing similarities with Bordetella-Bcep-Xylostella fastidiosa-like podoviruses, module 4 sharing similarities with P22-like podoviruses, and module 3 sharing no similarities with known phages. Comparisons to other sequenced bacterial genomes identified APSE-like elements in other heritable insect symbionts (Arsenophonus spp.) and enteric bacteria in the family Morganellaceae. Conclusions APSEs are most closely related to phage elements in the genus Arsenophonus and other bacteria in the Morganellaceae. |
format |
article |
author |
Bret M. Boyd Germain Chevignon Vilas Patel Kerry M. Oliver Michael R. Strand |
author_facet |
Bret M. Boyd Germain Chevignon Vilas Patel Kerry M. Oliver Michael R. Strand |
author_sort |
Bret M. Boyd |
title |
Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
title_short |
Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
title_full |
Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
title_fullStr |
Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
title_full_unstemmed |
Evolutionary genomics of APSE: a tailed phage that lysogenically converts the bacterium Hamiltonella defensa into a heritable protective symbiont of aphids |
title_sort |
evolutionary genomics of apse: a tailed phage that lysogenically converts the bacterium hamiltonella defensa into a heritable protective symbiont of aphids |
publisher |
BMC |
publishDate |
2021 |
url |
https://doaj.org/article/11600e04f127422f826f3c54fef16d86 |
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