オリゴフレクスス綱

オリゴフレクスス綱（オリゴフレクススこう、Oligoflexia）は、真正細菌のPseudomonadota門に属する綱の一つである。 2014年のOligoflexus tunisiensis（オリゴフレクスス・チュニジエンシス）発見論文の公表時に提案された。O. tunisiensisは、0.2μmフィルターを通過する特徴がある好気性の糸状菌で、チュニジア南部の都市マトマタから採取されたサハラ砂漠の砂礫より分離されたものである。 当初はO. tunisiensis1種と未培養種のみを含むとされたが、デルタプロテオバクテリア綱からブデロビブリオ目など一部の分類群が移されたことなどで、2024年現在は4目で構成されている。16S rRNA配列の系統解析により定義されており、共通する性質は少ないが、一応現在含まれている種は好気性のものが多く、また細胞が微少か幅が小さいものが多い。このほか存在量は少ないが、広い環境から16S rRNA配列が検出されている。 本綱は以下の目を含む（2024年10月現在)。 Bacteriovoracales　バクテリオボラックス目 Hahn et al. 2017 (IJSEMリストに掲載 2017)、Waite et al. 2020 (IJSEMリストに掲載 2021) タイプ属はBacteriovorax（バクテリオボラックス属）である。 Bacteriovoracaceae　バクテリオボラックス科 Davidov & Jurkevitch 2004 (IJSEMリストに掲載 2005)、修正　Koval et al. 2015 (IJSEMリストに掲載 2015) Bacteriovoraxのみを含む。 Halobacteriovoracaceae　ハロバクテリオボラックス科 Koval et al. 2015 (IJSEMリストに掲載 2015) Halobacteriovorax（ハロバクテリオボラックス属）のみを含む。 Bdellovibrionales　ブデロビブリオ目 Garrity et al. 2006 (IJSEMリストに掲載 2006)、修正　Hahn et al. 2017 (IJSEMリストに掲載 2017)、修正　Waite et al. 2020 (IJSEMリストに掲載 2021) タイプ属はBdellovibrio（ブデロビブリオ属）である。 Pseudobdellovibrionaceae　シュードブデロビブリオ科 Waite et al. 2022 (IJSEMリストに掲載 2023) Pseudobdellovibrio（シュードブデロビブリオ属）、Bdellovibrio、Micavibrio（ミカビブリオ属）を含む。 Oligoflexales　オリゴフレクスス目 Nakai et al. 2014 (IJSEMリストに掲載 2015)、修正　Hahn et al. 2017 (IJSEMリストに掲載 2017)、修正　Waite et al. 2020 (IJSEMリストに掲載 2021) タイプ属はOligoflexus（オリゴフレクスス属）である。 Oligoflexaceae　オリゴフレクスス科 Nakai et al. 2014 (IJSEMリストに掲載 2015) Oligoflexusのみを含む。 Pseudobacteriovoracaceae　シュードバクテリオボラックス科 McCauley et al. 2015 (IJSEMリストに掲載 2015) Pseudobacteriovorax（シュードバクテリオボラックス属）のみを含む。 Silvanigrellales　シルバニグレラ目 Hahn et al. 2017 (IJSEMリストに掲載 2017) タイプ属はSilvanigrella（シルバニグレラ属）である。 Silvanigrellaceae　シルバニグレラ科 Hahn et al. 2017 (IJSEMリストに掲載 2017) Silvanigrella、Fluviispira、Pigmentibacterを含む。 ^ a b c d e f Ryosuke Nakai1,2,†, Miyuki Nishijima3,†, Nozomi Tazato3, Yutaka Handa3, Fatma Karray4, Sami Sayadi4, Hiroko Isoda5 and Takeshi Naganuma1 (1 Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8528, Japan ; 2 Research Fellow of the Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo 102-8471, Japan ; 3 Technical Department, TechnoSuruga Laboratory Co., Ltd., 330 Nagasaki, Shimizu-ku, Shizuoka 424-0065, Japan ; 4 Centre of Biotechnology at Sfax, P.O. Box 1177, 3018 Sfax, Tunisia ; 5 Alliance for Research on North Africa (ARENA), University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572, Japan ; † 筆頭著者) (2014). “Oligoflexus tunisiensis gen. nov., sp. nov., a Gram-negative, aerobic, filamentous bacterium of a novel proteobacterial lineage, and description of Oligoflexaceae fam. nov., Oligoflexales ord. nov. and Oligoflexia classis nov.”. Int. J. Syst. Evol. Microbiol. 64 (Pt 10): 3353-9. doi:10.1099/ijs.0.060798-0. PMID 25013226.  ^ a b c d Aharon Oren1 and George M. Garrity2 (1 The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, Givat Ram, 91904 Jerusalem, Israel ; 2 Department of Microbiology & Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320, U.S.A.) (01 January 2015). “Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 64, part 10, of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 65 (Pt_1): 5-6. doi:10.1099/ijs.0.000005-0.  ^ a b c d e f g h Martin W. Hahn1,†, Johanna Schmidt1, Ulrike Koll1, Manfred Rohde2, Susanne Verbarg3, Alexandra Pitt1, Ryosuke Nakai4, Takeshi Naganuma5 and Elke Lang3 (1 Research Institute for Limnology, University of Innsbruck, Mondseestrasse 9, 5310 Mondsee, Austria ; 2 Central Facility for Microscopy, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany ; 3 Leibniz-Institut DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7B, 38124 Braunschweig, Germany ; 4 Genetic Strains Research Center, National Institute of Genetics, 1111 Yata, Mishima 411-0801, Japan ; 5 Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higahi-hiroshima 739-8528, Japan ; † 筆頭著者) (2017). “Silvanigrella aquatica gen. nov., sp. nov., isolated from a freshwater lake, description of Silvanigrellaceae fam. nov. and Silvanigrellales ord. nov., reclassification of the order Bdellovibrionales in the class Oligoflexia, reclassification of the families Bacteriovoracaceae and Halobacteriovoraceae in the new order Bacteriovoracales ord. nov., and reclassification of the family Pseudobacteriovoracaceae in the order Oligoflexales.”. Int. J. Syst. Evol. Microbiol. 67 (8): 2555-2568. doi:10.1099/ijsem.0.001965. PMID 28771119.  ^ a b c d e f g Aharon Oren1 and George M. Garrity2 (1: The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, 91904 Jerusalem, Israel ; 2 Department of Microbiology and Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320, USA *Correspondence: Aharon Oren) (01 November 2017). “Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 67, part 8, of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 67 (11): 4294-4297. doi:10.1099/ijsem.0.002359.  ^ a b c d e f g David W Waite 1 2, Maria Chuvochina 2, Claus Pelikan 3, Donovan H Parks 2, Pelin Yilmaz 4, Michael Wagner 3, Alexander Loy 3, Takeshi Naganuma 5, Ryosuke Nakai 6, William B Whitman 7, Martin W Hahn 8, Jan Kuever 9, Philip Hugenholtz 2 (1 School of Biological Sciences, University of Auckland, Auckland, New Zealand. ; 2 Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, Australia. ; 3 University of Vienna, Centre for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria. ; 4 b.experts GmbH Dortmund, Germany. ; 5 Hiroshima University, Hiroshima, Japan. ; 6 Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Hokkaido, Japan. ; 7 Department of Microbiology, University of Georgia, Athens, Georgia, USA. ; 8 Research Department for Limnology, University of Innsbruck, Mondsee, Austria. ; 9 Department of Microbiology, Bremen Institute for Materials Testing, Bremen, Germany. *Correspondence: David W Waite (05 November 2020). “Proposal to reclassify the proteobacterial classes Deltaproteobacteria and Oligoflexia, and the phylum Thermodesulfobacteria into four phyla reflecting major functional capabilities”. International Journal of Systematic and Evolutionary Microbiology 70 (11): 5972-6016. doi:10.1099/ijsem.0.004213.  ^ a b c d e f g Aharon Oren1ORCID icon and George M. Garrity2 (1 The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, 9190401 Jerusalem, Israel ; 2Department of Microbiology & Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320, USA *Correspondence: Aharon Oren) (26 February 2021). “Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 70, part 11 of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 71 (2): 4645. doi:10.1099/ijsem.0.004645.  ^ a b Jean P. Euzéby, Aidan C. Parte. “Class Oligoflexia”. List of Prokaryotic names with Standing in Nomenclature. 2024年10月1日閲覧。 ^ Nakai, R., Naganuma, T. (2015). “Oligoflexia, the Newest Class of the Phylum Proteobacteria, Consisting of only One Cultured Species and Uncultured Bacterial Phylotypes from Diverse Habitats.”. J. Phylogen. Evolution Biol. 3: 141. doi:10.4172/2329-9002.1000141.  ^ Yaacov Davidov1 and Edouard Jurkevitch1 (1 Department of Plant Pathology and Microbiology, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, PO Box 12, Rehovot 76100, Israel *CorrespondenceEdouard Jurkevitch) (01 September 2004). “Diversity and evolution of Bdellovibrio-and-like organisms (BALOs), reclassification of Bacteriovorax starrii as Peredibacter starrii gen. nov., comb. nov., and description of the Bacteriovorax–Peredibacter clade as Bacteriovoracaceae fam. nov.”. International Journal of Systematic and Evolutionary Microbiology 54 (5): 1439-1452. doi:10.1099/ijs.0.02978-0. PMID 15388693.  ^ “Notification that new names and new combinations have appeared in volume 54, part 5, of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 55 (1): 3-5. (01 January 2005). doi:10.1099/ijs.0.63563-0.  ^ a b Susan F. Koval1, Henry N. Williams2 and O. Colin Stine3 (1 Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1, Canada 2 School of the Environment, Florida A&M University, Tallahassee, FL 32307, USA ; 3 Department of Epidemiology and Public Health, University of Maryland, Baltimore, MD 21201, USA *Correspondence Susan F. Koval) (01 February 2015). “Reclassification of Bacteriovorax marinus as Halobacteriovorax marinus gen. nov., comb. nov. and Bacteriovorax litoralis as Halobacteriovorax litoralis comb. nov.; description of Halobacteriovoraceae fam. nov. in the class Deltaproteobacteria”. International Journal of Systematic and Evolutionary Microbiology 65 (Pt_2): 593-597. doi:10.1099/ijs.0.070201-0. PMC 4811658. PMID 25406234. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4811658/.  ^ a b c Aharon Oren1 and George M. Garrity2 (1 The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, Givat Ram, 91904 Jerusalem, Israel ; 2 Department of Microbiology & Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI, 48824-4320, U.S.A *Correspondence Aharon Oren) (01 May 2015). “Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 65, part 2, of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 65 (Pt_5): 1397-1399. doi:10.1099/ijs.0.000142.  ^ Garrity GM, Bell JA, Lilburn T (2005). “Order VII. Bdellovibrionales ord. nov.”. In Brenner DJ, Krieg NR, Staley JT, Garrity GM. Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria). Springer, ニューヨーク. p. 1040.  ^ “List of new names and new combinations previously effectively, but not validly, published”. International Journal of Systematic and Evolutionary Microbiology 56 (1): 1-6. (01 January 2006). doi:10.1099/ijs.0.64188-0.  ^ Markus Göker1 (1 Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstrasse 7B, D-38124 Braunschweig, Germany) (14 December 2022). “Filling the gaps: missing taxon names at the ranks of class, order and family”. International Journal of Systematic and Evolutionary Microbiology 72 (12): 5638. doi:10.1099/ijsem.0.005638. PMID 36748602.  ^ Aharon Oren1ORCID icon and Markus Göker2 (1 The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, 9190401 Jerusalem, Israel ; 2 Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures,, Inhoffenstrasse 7B, 38124 Braunschweig, Germany *Correspondence: Aharon Oren, aharon) (31 March 2023). “Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 72, part 12 of the IJSEM”. International Journal of Systematic and Evolutionary Microbiology 73 (3): 5799. doi:10.1099/ijsem.0.005799.  ^ Erin P. McCauley1, Brad Haltli1,2 and Russell G. Kerr1,2 (1 Department of Biomedical Sciences, Atlantic Veterinary College, Charlottetown, PE C1A 4P3, Canada ; 2 Department of Chemistry, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada *Correspondence Russell G. Kerr) (01 February 2015). “Description of Pseudobacteriovorax antillogorgiicola gen. nov., sp. nov., a bacterium isolated from the gorgonian octocoral Antillogorgia elisabethae, belonging to the family Pseudobacteriovoracaceae fam. nov., within the order Bdellovibrionales”. International Journal of Systematic and Evolutionary Microbiology 65 (Pt_2): 522-530. doi:10.1099/ijs.0.066266-0. PMID 25389148.