title: Nitrolancea hollandica gen. nov., sp. nov., a chemolithoautotrophic nitrite-oxidizing bacterium isolated from a bioreactor belonging to the phylum Chloroflexi.
abstract: A novel nitrite-oxidizing bacterium (NOB), strain Lb(T), was isolated from a nitrifying bioreactor with a high loading of ammonium bicarbonate in a mineral medium with nitrite as the energy source. The cells were oval (lancet-shaped) rods with pointed edges, non-motile, Gram-positive (by staining and from the cell wall structure) and non-spore-forming. Strain Lb(T) was an obligately aerobic, chemolitoautotrophic NOB, utilizing nitrite or formate as the energy source and CO2 as the carbon source. Ammonium served as the only source of assimilated nitrogen. Growth with nitrite was optimal at pH 6.8-7.5 and at 40 °C (maximum 46 °C). The membrane lipids consisted of C20 alkyl 1,2-diols with the dominant fatty acids being 10MeC18 and C(18 : 1)ω9. The peptidoglycan lacked meso-DAP but contained ornithine and lysine. The dominant lipoquinone was MK-8. Phylogenetic analyses of the 16s rRNA gene sequence placed strain Lb(T) into the class Thermomicrobia of the phylum Chloroflexi with Sphaerobacter thermophilus as the closest relative. On the basis of physiological and phylogenetic data, it is proposed that strain Lb(T) represents a novel species of a new genus, with the suggested name Nitrolancea hollandica gen. nov., sp. nov. The type strain of the type species is Lb(T) ( = DSM 23161(T) = UNIQEM U798(T)).
authors.affiliation: Department of Biotechnology, TU Delft, The Netherlands.|Winogradsky Institute of Microbiology RAS, Moscow, Russia.
authors.forename: Dimitry Y
authors.initials: DY
authors.lastname: Sorokin
authors.affiliation: Department of Water Technology, ICT Prague, Czech Republic.
authors.forename: Dana
authors.initials: D
authors.lastname: Vejmelkova
authors.affiliation: Department of Microbial Ecology, Ecology Centre, University of Vienna, Vienna, Austria.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Lücker
authors.affiliation: Microbiology Department, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
authors.forename: Galina M
authors.initials: GM
authors.lastname: Streshinskaya
authors.affiliation: Department of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, Den Burg, The Netherlands.
authors.forename: W Irene C
authors.initials: WIC
authors.lastname: Rijpstra
authors.affiliation: Department of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, Den Burg, The Netherlands.
authors.forename: Jaap S
authors.initials: JS
authors.lastname: Sinninghe Damsté
authors.affiliation: Department of Biotechnology, TU Delft, The Netherlands.
authors.forename: Robbert
authors.initials: R
authors.lastname: Kleerbezem
authors.affiliation: Department of Biotechnology, TU Delft, The Netherlands.
authors.forename: Mark
authors.initials: M
authors.lastname: van Loosdrecht
authors.affiliation: Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.
authors.forename: Gerard
authors.initials: G
authors.lastname: Muyzer
authors.affiliation: Department of Microbial Ecology, Ecology Centre, University of Vienna, Vienna, Austria.
authors.forename: Holger
authors.initials: H
authors.lastname: Daims
mesh_terms: D001482:Base Composition; D019149:Bioreactors / Q000382:microbiology*; D052837:Chemoautotrophic Growth; D041862:Chloroflexi / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000648:ultrastructure; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry; D008969:Molecular Sequence Data; D009426:Netherlands; D058465:Nitrification; D009573:Nitrites / Q000378:metabolism*; D010084:Oxidation-Reduction; D010457:Peptidoglycan / Q000737:chemistry; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D009573:Nitrites; D010457:Peptidoglycan; D012336:RNA, Ribosomal, 16S; D024482:Vitamin K 2; C024223:vitamin MK 8