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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Autores principales: Bret M. Boyd, Germain Chevignon, Vilas Patel, Kerry M. Oliver, Michael R. Strand
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Publicado: BMC 2021
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spelling 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)
institution DOAJ
collection DOAJ
language EN
topic Virus
Bacteria
Mutualism
Aphid
Parasitoid
Infectious and parasitic diseases
RC109-216
spellingShingle 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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