Transitional forms between the three domains of life and evolutionary implications

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Title: Transitional forms between the three domains of life and evolutionary implications
Authors: Reynaud, Emmanuel G.Devos, Damien P.
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Date: 14-Sep-2011
Online since: 2020-12-08T13:15:07Z
Abstract: The question as to the origin and relationship between the three domains of life is lodged in a phylogenetic impasse. The dominant paradigm is to see the three domains as separated. However, the recently characterized bacterial species have suggested continuity between the three domains. Here, we review the evidence in support of this hypothesis and evaluate the implications for and against the models of the origin of the three domains of life. The existence of intermediate steps between the three domains discards the need for fusion to explain eukaryogenesis and suggests that the last universal common ancestor was complex. We propose a scenario in which the ancestor of the current bacterial Planctomycetes, Verrucomicrobiae and Chlamydiae superphylum was related to the last archaeal and eukaryotic common ancestor, thus providing a way out of the phylogenetic impasse.
Funding Details: Science Foundation Ireland
Funding Details: EMBL
Type of material: Journal Article
Publisher: The Royal Society
Journal: Proceedings of the Royal Society B: Biological Sciences
Volume: 278
Start page: 3321
End page: 3328
Keywords: BacteriaArchaeaPhylogenyGenetic modelsEukaryotaBiological evolutionPlatypusTransition forms
DOI: 10.1098/rspb.2011.1581
Language: en
Status of Item: Peer reviewed
ISSN: 0962-8452
This item is made available under a Creative Commons License:
Appears in Collections:Biomolecular and Biomedical Science Research Collection

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