Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.

In 2009, James Lake introduced a new hypothesis in which reticulate phylogeny reconstruction is used to elucidate the origin of gram-negative bacteria (Nature 460: 967-971). The presented data supported the gram-negative bacteria originating from an ancient endosymbiosis between the Actinobacteria a...

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Autores principales:	Kristen S Swithers, Gregory P Fournier, Anna G Green, J Peter Gogarten, Pascal Lapierre
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/448959bc3e5c41caa18be4a1267a6de1
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id	oai:doaj.org-article:448959bc3e5c41caa18be4a1267a6de1
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spelling	oai:doaj.org-article:448959bc3e5c41caa18be4a1267a6de12021-11-18T06:47:39ZReassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.1932-620310.1371/journal.pone.0023774https://doaj.org/article/448959bc3e5c41caa18be4a1267a6de12011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21876769/?tool=EBIhttps://doaj.org/toc/1932-6203In 2009, James Lake introduced a new hypothesis in which reticulate phylogeny reconstruction is used to elucidate the origin of gram-negative bacteria (Nature 460: 967-971). The presented data supported the gram-negative bacteria originating from an ancient endosymbiosis between the Actinobacteria and Clostridia. His conclusion was based on a presence-absence analysis of protein families that divided all prokaryotes into five groups: Actinobacteria, Double Membrane bacteria (DM), Clostridia, Archaea and Bacilli. Of these five groups, the DM are by far the largest and most diverse group compared to the other groupings. While the fusion hypothesis for the origin of double membrane bacteria is enticing, we show that the signal supporting an ancient symbiosis is lost when the DM group is broken down into smaller subgroups. We conclude that the signal detected in James Lake's analysis in part results from a systematic artifact due to group size and diversity combined with low levels of horizontal gene transfer.Kristen S SwithersGregory P FournierAnna G GreenJ Peter GogartenPascal LapierrePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 8, p e23774 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kristen S Swithers Gregory P Fournier Anna G Green J Peter Gogarten Pascal Lapierre Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
description	In 2009, James Lake introduced a new hypothesis in which reticulate phylogeny reconstruction is used to elucidate the origin of gram-negative bacteria (Nature 460: 967-971). The presented data supported the gram-negative bacteria originating from an ancient endosymbiosis between the Actinobacteria and Clostridia. His conclusion was based on a presence-absence analysis of protein families that divided all prokaryotes into five groups: Actinobacteria, Double Membrane bacteria (DM), Clostridia, Archaea and Bacilli. Of these five groups, the DM are by far the largest and most diverse group compared to the other groupings. While the fusion hypothesis for the origin of double membrane bacteria is enticing, we show that the signal supporting an ancient symbiosis is lost when the DM group is broken down into smaller subgroups. We conclude that the signal detected in James Lake's analysis in part results from a systematic artifact due to group size and diversity combined with low levels of horizontal gene transfer.
format	article
author	Kristen S Swithers Gregory P Fournier Anna G Green J Peter Gogarten Pascal Lapierre
author_facet	Kristen S Swithers Gregory P Fournier Anna G Green J Peter Gogarten Pascal Lapierre
author_sort	Kristen S Swithers
title	Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
title_short	Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
title_full	Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
title_fullStr	Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
title_full_unstemmed	Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
title_sort	reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/448959bc3e5c41caa18be4a1267a6de1
work_keys_str_mv	AT kristensswithers reassessmentofthelineagefusionhypothesisfortheoriginofdoublemembranebacteria AT gregorypfournier reassessmentofthelineagefusionhypothesisfortheoriginofdoublemembranebacteria AT annaggreen reassessmentofthelineagefusionhypothesisfortheoriginofdoublemembranebacteria AT jpetergogarten reassessmentofthelineagefusionhypothesisfortheoriginofdoublemembranebacteria AT pascallapierre reassessmentofthelineagefusionhypothesisfortheoriginofdoublemembranebacteria
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Reassessment of the lineage fusion hypothesis for the origin of double membrane bacteria.

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