Thermaurantimonas aggregans gen. nov., sp. nov., a moderately thermophilic heterotrophic aggregating bacterium isolated from microbial mats at a terrestrial hot spring.

Thermaurantimonas aggregans gen. nov., sp. nov., a moderately thermophilic heterotrophic aggregating bacterium isolated from microbial mats at a terrestrial hot spring. Int J Syst Evol Microbiol. 2019 Nov 28;: Authors: Iino T, Kawai S, Yuki M, Dekio I, Ohkuma M, Haruta S Abstract A moderately thermophilic and heterotrophic bacterial strain, LAT, was isolated from microbial mats sampled at a hot spring in Nakabusa, Nagano, Japan. The cells of strain LAT were aerobic, Gram-stain-negative, non-sporulating, non-motile and rod-shaped (2.0-4.1 µm long). The formation of dense cell aggregates in liquid medium was a unique characteristic of the strain. Strain LAT grew optimally at 50°C and at pH 7.5. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that the nearest neighbour of strain LAT was Schleiferia thermophila JCM 30197T with 94.1 % sequence similarity. The draft genome sequence of strain LAT (2 671 880 bp) showed 18.0 % digital DNA-DNA hybridization, 70.9 % average nucleotide identity and 72.1 % average amino acid identity (AAI) values in comparison with the genome sequence of S. thermophila JCM 30197T (2 606 763 bp); the 16S rRNA gene sequence similarity and AAI values are lower than the cutoffs used for assignment to a separate genus. On the basis of phenotypic features, major cellular fatty acid composition, genome sequencing and phylogenetic position, a novel genus and species are proposed for s...
Source: International Journal of Systematic and Evolutionary Microbiology - Category: Microbiology Authors: Tags: Int J Syst Evol Microbiol Source Type: research