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cognitis nomina
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Authors Ito

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Ito, Michihiro


Publications
2

CitationNamesAbstract
Complete Genome Sequence of “ Candidatus Hydrogeosomobacter endosymbioticus,” an Intracellular Bacterial Symbiont of the Anaerobic Ciliate Scuticociliate GW7 Shiohama et al. (2022). Microbiology Resource Announcements 11 (2) Ca. Hydrogenosomobacter endosymbioticus
Tripartite Symbiosis of an Anaerobic Scuticociliate with Two Hydrogenosome-Associated Endosymbionts, a Holospora -Related Alphaproteobacterium and a Methanogenic Archaeon Takeshita et al. (2019). Applied and Environmental Microbiology 85 (24) Ca. Hydrogenosomobacter endosymbioticus Ca. Hydrogenosomobacter

Complete Genome Sequence of “ Candidatus Hydrogeosomobacter endosymbioticus,” an Intracellular Bacterial Symbiont of the Anaerobic Ciliate Scuticociliate GW7
The bacterium “ Candidatus Hydrogenosomobacter endosymbioticus” is an intracellular symbiont of anaerobic scuticociliate GW7, which is associated with hydrogenosome together with methanogenic archaea. Here, we report a complete genome sequence of the symbiont consisting of 827 kbp. Knowing this sequence would contribute to the understanding of the metabolic interactions and evolution of the tripartite symbiosis.
Tripartite Symbiosis of an Anaerobic Scuticociliate with Two Hydrogenosome-Associated Endosymbionts, a Holospora -Related Alphaproteobacterium and a Methanogenic Archaeon
Tripartite symbioses between anaerobic ciliated protists and their intracellular archaeal and bacterial symbionts are not uncommon, but most reports have been based mainly on microscopic observations. Deeper insights into the function, ecology, and evolution of these fascinating symbioses involving partners from all three domains of life have been hampered by the difficulties of culturing anaerobic ciliates in the laboratory and the frequent loss of their prokaryotic partners during long-term cultivation. In the present study, we report the isolation of an anaerobic scuticociliate, strain GW7, which has been stably maintained in our laboratory for more than 3 years without losing either of its endosymbionts. Unexpectedly, molecular characterization of the endosymbionts revealed that the bacterial partner of GW7 is phylogenetically related to intranuclear endosymbionts of aerobic ciliates. This strain will enable future genomic, transcriptomic, and proteomic analyses of the interactions in this tripartite symbiosis and a comparison with endosymbioses in aerobic ciliates.
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