Evidence map›Paper›PMID 22291975›Full record

ArticlePloS one2012

The SAR11 group of alpha-proteobacteria is not related to the origin of mitochondria.

Naiara Rodríguez-Ezpeleta, T Martin Embley

Abstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

48 citing papers in PubMed.

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  16. Farming the mitochondrial ancestor as a model of endosymbiotic establishment by natural selection.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  17. Archaea and the origin of eukaryotes.Nature reviews. Microbiology · 2017
    Review
  18. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Naiara Rodríguez-EzpeletaInstitute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, United Kingdom. nrodriguez@azti.es
T Martin Embley

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although free living, members of the successful SAR11 group of marine alpha-proteobacteria contain a very small and A+T rich genome, two features that are typical of mitochondria and related obligate intracellular parasites such as the Rickettsiales. Previous phylogenetic analyses have suggested that Candidatus Pelagibacter ubique, the first cultured member of this group, is related to the Rickettsiales+mitochondria clade whereas others disagree with this conclusion. In order to determine the evolutionary position of the SAR11 group and its relationship to the origin of mitochondria, we have performed phylogenetic analyses on the concatenation of 24 proteins from 5 mitochondria and 71 proteobacteria. Our results support that SAR11 group is not the sistergroup of the Rickettsiales+mitochondria clade and confirm that the position of this group in the alpha-proteobacterial tree is strongly affected by tree reconstruction artefacts due to compositional bias. As a consequence, genome reduction and bias toward a high A+T content may have evolved independently in the SAR11 species, which points to a different direction in the quest for the closest relatives to mitochondria and Rickettsiales. In addition, our analyses raise doubts about the monophyly of the newly proposed Pelagibacteraceae family.

Indexed as

Biological EvolutionAlphaproteobacteriaAmino Acid SequenceBase SequenceClassificationDNA, MitochondrialGenome, MitochondrialHumansMitochondriaMitochondrial ProteinsPhylogenyDNA, MitochondrialMitochondrial Proteins

Identifiers

PMID22291975
PMCPMC3264578

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.