FN Archimer Export Format PT J TI Physiological and Genomic Characterization of a Hyperthermophilic Archaeon Archaeoglobus neptunius sp. nov. Isolated From a Deep-Sea Hydrothermal Vent Warrants the Reclassification of the Genus Archaeoglobus BT AF Slobodkina, Galina ALLIOUX, Maxime Merkel, Alexander CAMBON BONAVITA, Marie-Anne ALAIN, Karine JEBBAR, Mohamed Slobodkin, Alexander AS 1:1;2:4;3:1;4:2;5:3;6:4;7:1; FF 1:;2:;3:;4:PDG-REM-EEP-LMEE;5:;6:;7:; C1 Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, Plouzané, France Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, Plouzané, France Laboratoire de Microbiologie des Environnements Extrêmes LM2E, Univ Brest, CNRS, IFREMER, IRP 1211 MicrobSea, UMR 6197, Plouzané, France C2 RUSSIAN ACAD SCI, RUSSIA IFREMER, FRANCE CNRS, FRANCE UBO, FRANCE SI BREST SE PDG-REM-EEP-LMEE UM BEEP-LM2E IN WOS Ifremer UMR WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france copubli-int-hors-europe IF 6.064 TC 5 UR https://archimer.ifremer.fr/doc/00705/81715/86315.pdf https://archimer.ifremer.fr/doc/00705/81715/86316.pptx https://archimer.ifremer.fr/doc/00705/81715/86317.xls https://archimer.ifremer.fr/doc/00705/81715/86318.docx LA English DT Article CR BICOSE 2 BO Pourquoi pas ? DE ;sulfate reduction;chemolithoautotroph;anaerobe;hyperthermophile;Archaea AB Hyperthermophilic archaea of the genus Archaeoglobus are the subject of many fundamental and biotechnological researches. Despite their significance, the class Archaeoglobi is currently represented by only eight species obtained as axenic cultures and taxonomically characterized. Here, we report the isolation and characterization of a new species of Archaeoglobus from a deep-sea hydrothermal vent (Mid-Atlantic Ridge, TAG) for which the name Archaeoglobus neptunius sp. nov. is proposed. The type strain is SE56T (=DSM 110954T = VKM B-3474T). The cells of the novel isolate are motile irregular cocci growing at 50–85°C, pH 5.5–7.5, and NaCl concentrations of 1.5–4.5% (w/v). Strain SE56T grows lithoautotrophically with H2 as an electron donor, sulfite or thiosulfate as an electron acceptor, and CO2/HCO3− as a carbon source. It is also capable of chemoorganotrophic growth by reduction of sulfate, sulfite, or thiosulfate. The genome of the new isolate consists of a 2,115,826 bp chromosome with an overall G + C content of 46.0 mol%. The whole-genome annotation confirms the key metabolic features of the novel isolate demonstrated experimentally. Genome contains a complete set of genes involved in CO2 fixation via reductive acetyl-CoA pathway, gluconeogenesis, hydrogen and fatty acids oxidation, sulfate reduction, and flagellar motility. The phylogenomic reconstruction based on 122 conserved single-copy archaeal proteins supported by average nucleotide identity (ANI), average amino acid identity (AAI), and alignment fraction (AF) values, indicates a polyphyletic origin of the species currently included into the genus Archaeoglobus, warranting its reclassification. PY 2021 PD JUN SO Frontiers In Microbiology SN 1664-302X PU Frontiers Media VL 12 UT 000679984900001 DI 10.3389/fmicb.2021.679245 ID 81715 ER EF