Evidence map›Paper›PMID 27573819›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Repeated replacement of an intrabacterial symbiont in the tripartite nested mealybug symbiosis.

Filip Husnik, John P McCutcheon

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 120 papers.

0numbers the graph read from it
0cells of the map it votes in
120citing 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

120 citing papers in PubMed.

  1. Review
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  5. Cellular remodeling of ovarian follicular epithelial cells transmits an obligate nutritional endosymbiont in a scale insect.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  8. A genomic view of Earth's biomes.Nature reviews. Genetics · 2026
    Review
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60 more citing papers are in PubMed but not listed here.

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.

Filip HusnikDivision of Biological Sciences, University of Montana, Missoula, MT 59812; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice 37005, Czech Republic; Faculty of Science, University of South Bohemia, Ceske Budejovice 37005, Czech Republic; filip.husnik@gmail.com john.mccutcheon@umontana.edu.
John P McCutcheonDivision of Biological Sciences, University of Montana, Missoula, MT 59812; Canadian Institute for Advanced Research, Program in Integrated Microbial Biodiversity, Toronto, ON, Canada M5G 1Z8 filip.husnik@gmail.com john.mccutcheon@umontana.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Stable endosymbiosis of a bacterium into a host cell promotes cellular and genomic complexity. The mealybug Planococcus citri has two bacterial endosymbionts with an unusual nested arrangement: the γ-proteobacterium Moranella endobia lives in the cytoplasm of the β-proteobacterium Tremblaya princeps These two bacteria, along with genes horizontally transferred from other bacteria to the P. citri genome, encode gene sets that form an interdependent metabolic patchwork. Here, we test the stability of this three-way symbiosis by sequencing host and symbiont genomes for five diverse mealybug species and find marked fluidity over evolutionary time. Although Tremblaya is the result of a single infection in the ancestor of mealybugs, the γ-proteobacterial symbionts result from multiple replacements of inferred different ages from related but distinct bacterial lineages. Our data show that symbiont replacement can happen even in the most intricate symbiotic arrangements and that preexisting horizontally transferred genes can remain stable on genomes in the face of extensive symbiont turnover.

Indexed as

AnimalsBetaproteobacteriaGammaproteobacteriaGene Transfer, HorizontalGenome, BacterialPhylogenyPlanococcus InsectSequence Analysis, DNASymbiosishorizontal gene transferorganellescale insectSodalis

Identifiers

PMID27573819
PMCPMC5027413

What OpenQuestion holds

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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.