Evidence map›Paper›PMID 26286984›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2015

Genome expansion via lineage splitting and genome reduction in the cicada endosymbiont Hodgkinia.

Matthew A Campbell, James T Van Leuven, Russell C Meister, Kaitlin M Carey, Chris Simon, John P McCutcheon

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing 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

50 citing papers in PubMed.

  1. First Record ofInsects · 2026
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  4. Whole Genome Sequences ofCurrent genomics · 2025
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  11. Symbionts inApplied and environmental microbiology · 2023
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  20. Human follicular mites: Ectoparasites becoming symbionts.Molecular biology and evolution · 2022
    Article
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

6 authors.

Matthew A CampbellDivision of Biological Sciences, University of Montana, Missoula, MT 59812;
James T Van LeuvenDivision of Biological Sciences, University of Montana, Missoula, MT 59812;
Russell C MeisterDepartment of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269;
Kaitlin M CareyDivision of Biological Sciences, University of Montana, Missoula, MT 59812;
Chris SimonDepartment of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269;
John P McCutcheonDivision of Biological Sciences, University of Montana, Missoula, MT 59812; Program in Integrated Microbial Biodiversity, Canadian Institute for Advanced Research, Toronto, ON, Canada M5G 1Z8 john.mccutcheon@umontana.edu.

Funding

THE ROLE OF PULMONARY SUBPOPULATIONS AND TH2 IMMUNITY IN BALB/C SILICOSIS MODELP20RR017670 · NCRR · UNIVERSITY OF MONTANA · PI ROBERTS, KEVAN · 2002 to 2011
$22.0M
NCRR NIH HHS P20RR017670
6 · The paper itself

Abstract

Comparative genomics from mitochondria, plastids, and mutualistic endosymbiotic bacteria has shown that the stable establishment of a bacterium in a host cell results in genome reduction. Although many highly reduced genomes from endosymbiotic bacteria are stable in gene content and genome structure, organelle genomes are sometimes characterized by dramatic structural diversity. Previous results from Candidatus Hodgkinia cicadicola, an endosymbiont of cicadas, revealed that some lineages of this bacterium had split into two new cytologically distinct yet genetically interdependent species. It was hypothesized that the long life cycle of cicadas in part enabled this unusual lineage-splitting event. Here we test this hypothesis by investigating the structure of the Ca. Hodgkinia genome in one of the longest-lived cicadas, Magicicada tredecim. We show that the Ca. Hodgkinia genome from M. tredecim has fragmented into multiple new chromosomes or genomes, with at least some remaining partitioned into discrete cells. We also show that this lineage-splitting process has resulted in a complex of Ca. Hodgkinia genomes that are 1.1-Mb pairs in length when considered together, an almost 10-fold increase in size from the hypothetical single-genome ancestor. These results parallel some examples of genome fragmentation and expansion in organelles, although the mechanisms that give rise to these extreme genome instabilities are likely different.

Indexed as

Genome, BacterialSymbiosisAlphaproteobacteriaAnimalsEvolution, MolecularFemaleGenome, MitochondrialGenomicsHemipteraIn Situ Hybridization, FluorescenceMolecular Sequence DataOpen Reading FramesOrganellesPhylogenyPlastidsRibosomesbacteriagenome evolutionnonadaptive evolutionorganellessymbiosis

Identifiers

PMID26286984
PMCPMC4547289

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.