Ben Hania Wajdi auteur aut IRD Fadhlaoui K. auteur aut IRD Brochier-Armanet C. auteur aut IRD Persillon C. auteur aut IRD Postec A. auteur aut IRD Hamdi M. auteur aut IRD Dolla A. auteur aut IRD Ollivier Bernard auteur aut IRD Fardeau Marie-Laure auteur aut IRD Le Mer Jean auteur aut IRD Erauso G. auteur aut IRD text journalArticle eng text/pdf born digital access Mesotoga strain PhosAc3 was the first mesophilic cultivated member of the order Thermotogales. This genus currently contain two described species, M. prima and M. infera. Strain PhosAc3, isolated from a Tunisian digestor treating phosphogypsum, is phylogenetically closely related to M. prima strain MesG1.Ag.4.2(T). Strain PhosAc3 has a genome of 3.1 Mb with a G + C content of 45.2%. It contains 3,051 protein-coding genes of which 74.6% have their best reciprocal BLAST hit in the genome of the type species, strain MesG1.Ag.4.2(T). For this reason we propose to assign strain PhosAc3 as a novel ecotype of the Mesotoga prima species. However, in contrast with the M. prima type strain, (i) it does not ferment sugars but uses them only in the presence of elemental sulfur as terminal electron acceptor, (ii) it produces only acetate and CO2 from sugars, whereas strain MesG1.Ag.4.2(T) produces acetate, butyrate, isobutyrate, isovalerate, 2-methyl-butyrate and (iii) sulfides are also end products of the elemental sulfur reduction in theses growth conditions. specialized Anaerobic Mesophilic Thermotogales Mesotoga TUNISIE 084 10 12 [7 ] 2015 1944-3277 https://www.documentation.ird.fr/hor/fdi:010066120 10.1186/1944-3277-10-12 1944-3277 [F B010066120] https://www.documentation.ird.fr/hor/fdi:010066120 https://www.documentation.ird.fr/intranet/publi/2016/02/010066120.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-02-26 2021-09-16 fdi:010066120 fre