Evidence map›Paper›PMID 30727958›Full record

ArticleBMC genomics2019

Genome expansion of an obligate parthenogenesis-associated Wolbachia poses an exception to the symbiont reduction model.

A A Kampfraath, L Klasson, S Y Anvar, R H A M Vossen, D Roelofs, K Kraaijeveld, J Ellers

Open access · goldAbstract read
In one paragraph

Article in BMC genomics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
5.8field-weighted citation impact, top 4% of its field
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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

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  13. Diminutive, degraded but dissimilar:Microbial genomics · 2020
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  14. An Earliest Endosymbiont,International journal of molecular sciences · 2020
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  15. Article
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  19. Evolution ofPeerJ · 2020
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  20. The Wolbachia Symbiont: Here, There and Everywhere.Results and problems in cell differentiation · 2020
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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

7 authors at 3 institutions in 2 countries.

A A KampfraathDepartment of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands. a.a.kampfraath@vu.nl.
L KlassonDepartment of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.
S Y AnvarDepartment of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
R H A M VossenLeiden Genome Technology Center, Leiden University Medical Center, Leiden, The Netherlands.
D RoelofsDepartment of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
K KraaijeveldDepartment of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
J EllersDepartment of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Vrije Universiteit Amsterdam · NLLeiden University Medical Center · NLUppsala University · SE

Funding

Nederlandse Organisatie voor Wetenschappelijk Onderzoek 865.12.003Stichting voor de Technische Wetenschappen 15494
6 · The paper itself

Abstract

backgroundTheory predicts that dependency within host-endosymbiont interactions results in endosymbiont genome size reduction. Unexpectedly, the largest Wolbachia genome was found in the obligate, parthenogenesis-associated wFol. In this study, we investigate possible processes underlying this genome expansion by comparing a re-annotated wFol genome to other Wolbachia genomes. In addition, we also search for candidate genes related to parthenogenesis induction (PI).

resultsWithin wFol, we found five phage WO regions representing 25.4% of the complete genome, few pseudogenized genes, and an expansion of DNA-repair genes in comparison to other Wolbachia. These signs of genome conservation were mirrored in the wFol host, the springtail F. candida, which also had an expanded DNA-repair gene family and many horizontally transferred genes. Across all Wolbachia genomes, there was a strong correlation between gene numbers of Wolbachia strains and their hosts. In order to identify genes with a potential link to PI, we assembled the genome of an additional PI strain, wLcla. Comparisons between four PI Wolbachia, including wFol and wLcla, and fourteen non-PI Wolbachia yielded a small set of potential candidate genes for further investigation.

conclusionsThe strong similarities in genome content of wFol and its host, as well as the correlation between host and Wolbachia gene numbers suggest that there may be some form of convergent evolution between endosymbiont and host genomes. If such convergent evolution would be strong enough to overcome the evolutionary forces causing genome reduction, it would enable expanded genomes within long-term obligate endosymbionts.

Indexed as

Gene Transfer, HorizontalGenome, BacterialParthenogenesisSymbiosisAnimalsArthropodsDNA RepairEvolution, MolecularSequence Analysis, DNAWolbachiaFolsomia candidaLeptopilina clavipesParthenogenesis inductionwFolwLcla

Identifiers

PMID30727958
PMCPMC6364476
OpenAlexW2912666986

What OpenQuestion holds

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LicenceCC BY
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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.