ArticleProceedings of the National Academy of Sciences of the United States of America2011
Antarctic and Arctic populations of the ciliate Euplotes nobilii show common pheromone-mediated cell-cell signaling and cross-mating.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 45 citations in OpenAlex.
- Cold-adaptive variations in the membrane lipid composition in polar species of the ciliateFrontiers in microbiology · 2026Article
- Article
- Morphometric and richness analysis of free-living and parasite taxa-invading street wetlands in Port Said, Egypt.Open veterinary journal · 2025Article
- Bipolar Biogeographical Distribution of Parafrancisella Bacteria Carried by the Ciliate Euplotes.Microbial ecology · 2023Article
- Crystal structure of the pheromone Er-13 from the ciliate Euplotes raikovi, with implications for a protein-protein association model in pheromone/receptor interactions.Journal of structural biology · 2022Article
- The Anti-Oxidant Defense System of the Marine Polar Ciliate Euplotes nobilii: Characterization of the MsrB Gene Family.Biology · 2017Article
- Article
- Unfolding thermodynamics of cysteine-rich proteins and molecular thermal-adaptation of marine ciliates.Biomolecules · 2013Article
- Characterization and expression of the gene encoding En-MAPK1, an intestinal cell kinase (ICK)-like kinase activated by the autocrine pheromone-signaling loop in the Polar Ciliate, Euplotes nobilii.International journal of molecular sciences · 2013Article
- Thermodynamic stability of psychrophilic and mesophilic pheromones of the protozoan ciliate euplotes.Biology · 2013Article
- Divergences in the response to ultraviolet radiation between polar and non-polar ciliated protozoa: UV radiation effects in Euplotes.Microbial ecology · 2012Article
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Authors and funding
8 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Wild-type strains of the protozoan ciliate Euplotes collected from different locations on the coasts of Antarctica, Tierra del Fuego and the Arctic were taxonomically identified as the morpho-species Euplotes nobilii, based on morphometric and phylogenetic analyses. Subsequent studies of their sexual interactions revealed that mating combinations of Antarctic and Arctic strains form stable pairs of conjugant cells. These conjugant pairs were isolated and shown to complete mutual gene exchange and cross-fertilization. The biological significance of this finding was further substantiated by demonstrating that close homology exists among the three-dimensional structures determined by NMR of the water-borne signaling pheromones that are constitutively secreted into the extracellular space by these interbreeding strains, in which these molecules trigger the switch between the growth stage and the sexual stage of the life cycle. The fact that Antarctic and Arctic E. nobilii populations share the same gene pool and belong to the same biological species provides new support to the biogeographic model of global distribution of eukaryotic microorganisms, which had so far been based exclusively on studies of morphological and phylogenetic taxonomy.
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