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New Intranuclear Symbiotic Bacteria from Macronucleus of Paramecium putrinum—“Candidatus Gortzia Yakutica”

Department of Invertebrate Zoology, Saint Petersburg State University, 199034 Saint Petersburg, Russia
Bioinformatics Institute, 197342 Saint Petersburg, Russia
Kharkevitch Institute for Information Transmission Problems, 127051 Moscow, Russia
Skolkovo Institute of Science and Technology, 143026 Moscow, Russia
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China
Authors to whom correspondence should be addressed.
Diversity 2020, 12(5), 198;
Received: 6 April 2020 / Revised: 11 May 2020 / Accepted: 12 May 2020 / Published: 15 May 2020
(This article belongs to the Special Issue Biodiversity of Ciliates and their Symbionts)
Holospora-like bacteria (HLB) are obligate intracellular Alphaproteobacteria, inhabiting nuclei of Paramecium and other ciliates such as “Candidatus Hafkinia” is in Frontonia. The HLB clade is comprised of four genera, Holospora, Preeria, “Candidatus Gortzia”, and “Candidatus Hafkinia”. These bacteria have a peculiar life cycle with two morphological forms and some degree of specificity to the host species and the type of nucleus they inhabit. Here we describe a novel species of HLB—“Candidatus Gortzia yakutica” sp. nov.—a symbiont from the macronucleus of Paramecium putrinum, the first described HLB for this Paramecium species. The new endosymbiont shows morphological similarities with other HLB. The phylogenetic analysis of the SSU rRNA gene places it into the “Candidatus Gortzia” clade. View Full-Text
Keywords: symbiosis; intranuclear bacteria; Holospora; Gortzia; Paramecium symbiosis; intranuclear bacteria; Holospora; Gortzia; Paramecium
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Beliavskaia, A.Y.; Predeus, A.V.; Garushyants, S.K.; Logacheva, M.D.; Gong, J.; Zou, S.; Gelfand, M.S.; Rautian, M.S. New Intranuclear Symbiotic Bacteria from Macronucleus of Paramecium putrinum—“Candidatus Gortzia Yakutica”. Diversity 2020, 12, 198.

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