Cited by 267Genomics and Phylogenetic StudiesProtist diversity and phylogenyRNA and protein synthesis mechanisms

The Rooting of the Universal Tree of Life Is Not Reliable

Philippe, Hervé, Forterre, Patrick·1999·Journal of Molecular Evolution

Abstract

Several composite universal trees connected by an ancestral gene duplication have been used to root the universal tree of life. In all cases, this root turned out to be in the eubacterial branch. However, the validity of results obtained from comparative sequence analysis has recently been questioned, in particular, in the case of ancient phylogenies. For example, it has been shown that several eukaryotic groups are misplaced in ribosomal RNA or elongation factor trees because of unequal rates of evolution and mutational saturation. Furthermore, the addition of new sequences to data sets has often turned apparently reasonable phylogenies into confused ones. We have thus revisited all composite protein trees that have been used to root the universal tree of life up to now (elongation factors, ATPases, tRNA synthetases, carbamoyl phosphate synthetases, signal recognition particle proteins) with updated data sets. In general, the two prokaryotic domains were not monophyletic with several aberrant groupings at different levels of the tree. Furthermore, the respective phylogenies contradicted each others, so that various ad hoc scenarios (paralogy or lateral gene transfer) must be proposed in order to obtain the traditional Archaebacteria-Eukaryota sisterhood. More importantly, all of the markers are heavily saturated with respect to amino acid substitutions. As phylogenies inferred from saturated data sets are extremely sensitive to differences in evolutionary rates, present phylogenies used to root the universal tree of life could be biased by the phenomenon of long branch attraction. Since the eubacterial branch was always the longest one, the eubacterial rooting could be explained by an attraction between this branch and the long branch of the outgroup. Finally, we suggested that an eukaryotic rooting could be a more fruitful working hypothesis, as it provides, for example, a simple explanation to the high genetic similarity of Archaebacteria and Eubacteria inferred from complete genome analysis.

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Crossref · 10.1007/pl00006573

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  • The younger inferred ages of some nodes in the ATP synthase analysis may be due in part to the shorter ATP synthase alignment (433-512 AA) and lower phylogenetic resolution reducing the species tree calibrations and braces to the ATP synthase phylogeny through gene and species tree incongruence.

    “In part, this may be due to the shorter alignment of ATP synthase (433-512AA, Supplementary Figs. 4–7, 10) and lower phylogenetic resolution102 reducing the species tree calibrations and braces to the ATP synthase phylogeny through gene and species tree incongruence (Supplementary Information).”

    From ATP synthase evolution on a cross-braced dated tree of life (2023) · cites this paper as [102]

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Authors
Philippe, H., & Forterre, P.
Affiliations
Université Paris-Sud (FR)
Venue
Journal of Molecular Evolution
Published
1999-10
Volume
49
Issue
4
Pages
509-523
ISSN
0022-2844 (ISSN-L)
OpenAlex
W2108093581
Cited by
267
References
55
Citations by year
2026: 4 · 2025: 7 · 2024: 8 · 2023: 13 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 4 · 2018: 11 · 2017: 9 · 2016: 2 · 2015: 11 · 2014: 9 · 2013: 9 · 2012: 7
FWCI
5.98
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Molecular Evolution (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Allergy and Infectious Diseases
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protist diversity and phylogeny
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
universal tree of life, root placement, long-branch attraction, protein phylogeny, elongation factors, ATPase, tRNA synthetase, carbamoyl phosphate synthetase, horizontal gene transfer, paralogy
MeSH terms
Adenosine Triphosphatases, Animals, Archaea, Bacteria, Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing), Eubacterium, Humans, Phylogeny, Databases, Factual, Evolution, Molecular, Gene Duplication

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