ArticleGenome biology and evolution2016
Genome Evolution in the Obligate but Environmentally Active Luminous Symbionts of Flashlight Fish.
Article in Genome biology and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 28 citations in OpenAlex.
- Draft genomes ofMicrobiology resource announcements · 2026Article
- Review
- The reduced genome of Candidatus Portiera sp. in Bemisia afer: evolutionary trajectories and functional implications.BMC genomics · 2026Article
- Fast, bioluminescent blinks attract group members of the nocturnal flashlight fish Anomalops katoptron (Bleeker, 1856).Frontiers in zoology · 2025Article
- Endosymbioses Have Shaped the Evolution of Biological Diversity and Complexity Time and Time Again.Genome biology and evolution · 2024Review
- The importance of host physical niches for the stability of gut microbiome composition.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024Review
- Emerging Research Topics in the Vibrionaceae and the Squid-Microorganisms · 2022Review
- A complex interplay of evolutionary forces continues to shape ancient co-occurring symbiont genomes.iScience · 2022Article
- The "Other"Applied and environmental microbiology · 2022Review
- The coral symbiont Candidatus Aquarickettsia is variably abundant in threatened Caribbean acroporids and transmitted horizontally.The ISME journal · 2022Article
- Acquisition of bioluminescent trait by non-luminous organisms from luminous organisms through various origins.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2021Review
- Intracellular Bacterial Symbionts in Corals: Challenges and Future Directions.Microorganisms · 2021Review
- Social signaling via bioluminescent blinks determines nearest neighbor distance in schools of flashlight fish Anomalops katoptron.Scientific reports · 2021Article
- Article
- The role of microbial motility and chemotaxis in symbiosis.Nature reviews. Microbiology · 2019Review
- Bioluminescent flashes drive nighttime schooling behavior and synchronized swimming dynamics in flashlight fish.PloS one · 2019Article
- Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The luminous bacterial symbionts of anomalopid flashlight fish are thought to be obligately dependent on their hosts for growth and share several aspects of genome evolution with unrelated obligate symbionts, including genome reduction. However, in contrast to most obligate bacteria, anomalopid symbionts have an active environmental phase that may be important for symbiont transmission. Here we investigated patterns of evolution between anomalopid symbionts compared with patterns in free-living relatives and unrelated obligate symbionts to determine if trends common to obligate symbionts are also found in anomalopid symbionts. Two symbionts, "Candidatus Photodesmus katoptron" and "Candidatus Photodesmus blepharus," have genomes that are highly similar in gene content and order, suggesting genome stasis similar to ancient obligate symbionts present in insect lineages. This genome stasis exists in spite of the symbiont's inferred ability to recombine, which is frequently lacking in obligate symbionts with stable genomes. Additionally, we used genome comparisons and tests of selection to infer which genes may be particularly important for the symbiont's ecology compared with relatives. In keeping with obligate dependence, substitution patterns suggest that most symbiont genes are experiencing relaxed purifying selection compared with relatives. However, genes involved in motility and carbon storage, which are likely to be used outside the host, appear to be under increased purifying selection. Two chemoreceptor chemotaxis genes are retained by both species and show high conservation with amino acid sensing genes, suggesting that the bacteria may actively seek out hosts using chemotaxis toward amino acids, which the symbionts are not able to synthesize.
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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.