title: Pyrobaculum ferrireducens sp. nov., a hyperthermophilic Fe(III)-, selenate- and arsenate-reducing crenarchaeon isolated from a hot spring.
abstract: A novel hyperthermophilic, anaerobic, archaeon was isolated from a terrestrial hot spring at Uzon Caldera, Kronotsky Nature Reserve, Kamchatka, Russia. The isolate, strain 1860(T), grew optimally at 90-95 °C and pH 6.0-7.0. The cells were non-motile straight rods, 1.5-5.0 µm in length, covered with surface-layer lattice. Strain 1860(T) utilized complex proteinaceous compounds as electron donors and ferrihydrite, Fe(III) citrate, nitrate, thiosulfate, selenite, selenate and arsenate as electron acceptors for growth. The sequence of the 16S rRNA gene of strain 1860(T) had 97.9-98.7 % similarity with those of members of the genus Pyrobaculum. On the basis of its physiological properties and phylogenetic analyses including in silico genome to genome hybridization, the isolate is considered to represent a novel species, for which the name Pyrobaculum ferrireducens sp. nov. is proposed. The type strain is 1860(T) ( = DSM 28942(T) = VKM B-2856(T)).
authors.affiliation: Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117312 Moscow, Russia.
authors.forename: G B
authors.initials: GB
authors.lastname: Slobodkina
authors.affiliation: Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117312 Moscow, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Lebedinsky
authors.affiliation: Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117312 Moscow, Russia.
authors.forename: N A
authors.initials: NA
authors.lastname: Chernyh
authors.affiliation: Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117312 Moscow, Russia.
authors.forename: E A
authors.initials: EA
authors.lastname: Bonch-Osmolovskaya
authors.affiliation: Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117312 Moscow, Russia.
authors.forename: A I
authors.initials: AI
authors.lastname: Slobodkin
mesh_terms: D001149:Arsenates / Q000378:metabolism; D004269:DNA, Bacterial / Q000235:genetics; D005290:Ferric Compounds / Q000378:metabolism; D045482:Hot Springs / Q000382:microbiology*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D041543:Pyrobaculum / Q000235:genetics* / Q000254:growth & development / Q000302:isolation & purification; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012426:Russia; D064586:Selenic Acid / Q000378:metabolism; D017422:Sequence Analysis, DNA; D014871:Water Microbiology
chemical_list: D001149:Arsenates; D004269:DNA, Bacterial; D005290:Ferric Compounds; D012336:RNA, Ribosomal, 16S; C092844:ferric oxyhydroxide; D064586:Selenic Acid; C025657:arsenic acid