Abstract
A novel Gram-negative, motile, rod-shaped bacterium, designated 4137-clT, was isolated from a thermal spring of North Ossetia (Russian Federation). Strain 4137-clT grew at 30-50°C (optimum 42°C) with 0-3.5% NaCl (optimum 0-0.3%) and within pH range 4.0-8.7 (optimum pH 6.8-7.3). It was a strictly anaerobic microorganism capable of fermentation and respiration on organic acids and proteinaceous substrates. Sulfur, sulfite, polysulfide, and arsenate were used as electron acceptors. In addition to heterotrophic growth it grew autotrophically with H2/CO2. The major fatty acids were C16:1 ω8c and C16:0. The size of the genome and genomic DNA G+C content of strain 4137-clT were 4.5Mb and 59.2%, respectively. According to the 16S rRNA gene sequence and conserved protein sequences phylogenies, strain 4137-clT represented a distinct lineage of the family Acetonemataceae within the class Negativicutes. As inferred from the morphology, physiology, chemotaxonomical and phylogenomic analyses, strain 4137-clT ought to be recognized as a novel genus for which the name Anaeroselena agilis gen. nov., sp. nov., we propose. The type strain is 4137-clT(=KCTC 25383T = VKM B-3575T).
Published Version
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