ArticleMicrobial ecology2019
A New Species of the γ-Proteobacterium Francisella, F. adeliensis Sp. Nov., Endocytobiont in an Antarctic Marine Ciliate and Potential Evolutionary Forerunner of Pathogenic Species.
Article in Microbial ecology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 29 citations in OpenAlex.
- Genomic Evolution of Francisella: Metabolic Innovation, Endosymbiotic Transitions to Ticks, and Biogeographic History.Genome biology and evolution · 2026Article
- Draft genomes of three cultured members of a psychrophilicMicrobiology resource announcements · 2026Article
- Host-bacteria interactions: ecological and evolutionary insights from ancient, professional endosymbionts.FEMS microbiology reviews · 2024Review
- Symbionts of Ciliates and Ciliates as Symbionts.Indian journal of microbiology · 2024Review
- Bipolar Biogeographical Distribution of Parafrancisella Bacteria Carried by the Ciliate Euplotes.Microbial ecology · 2023Article
- Discovery of a glutathione utilization pathway in Francisella that shows functional divergence between environmental and pathogenic species.Cell host & microbe · 2023Article
- At the threshold of symbiosis: the genome of obligately endosymbiotic 'Microbial genomics · 2022Article
- Bacterial symbiosis in ciliates (Alveolata, Ciliophora): Roads traveled and those still to be taken.The Journal of eukaryotic microbiology · 2022Review
- The microbiome of a bacterivorous marine choanoflagellate contains a resource-demanding obligate bacterial associate.Nature microbiology · 2022Article
- Reorganized Genomic Taxonomy ofMicroorganisms · 2021Article
- Morphology, ultrastructure, genomics, and phylogeny of Euplotes vanleeuwenhoeki sp. nov. and its ultra-reduced endosymbiont "Candidatus Pinguicoccus supinus" sp. nov.Scientific reports · 2020Article
- Exploring the Diversity Within the GenusFrontiers in microbiology · 2020Article
- The core microbiome of sessile ciliate Stentor coeruleus is not shaped by the environment.Scientific reports · 2019Article
- Symbionts of the ciliate Euplotes: diversity, patterns and potential as models for bacteria-eukaryote endosymbioses.Proceedings. Biological sciences · 2019Article
Corrections and comments
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Authors and funding
11 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The study of the draft genome of an Antarctic marine ciliate, Euplotes petzi, revealed foreign sequences of bacterial origin belonging to the γ-proteobacterium Francisella that includes pathogenic and environmental species. TEM and FISH analyses confirmed the presence of a Francisella endocytobiont in E. petzi. This endocytobiont was isolated and found to be a new species, named F. adeliensis sp. nov.. F. adeliensis grows well at wide ranges of temperature, salinity, and carbon dioxide concentrations implying that it may colonize new organisms living in deeply diversified habitats. The F. adeliensis genome includes the igl and pdp gene sets (pdpC and pdpE excepted) of the Francisella pathogenicity island needed for intracellular growth. Consistently with an F. adeliensis ancient symbiotic lifestyle, it also contains a single insertion-sequence element. Instead, it lacks genes for the biosynthesis of essential amino acids such as cysteine, lysine, methionine, and tyrosine. In a genome-based phylogenetic tree, F. adeliensis forms a new early branching clade, basal to the evolution of pathogenic species. The correlations of this clade with the other clades raise doubts about a genuine free-living nature of the environmental Francisella species isolated from natural and man-made environments, and suggest to look at F. adeliensis as a pioneer in the Francisella colonization of eukaryotic organisms.
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