Fastidiosibacter lacustris gen. nov., sp. nov., isolated from a lake water sample, and proposal of Fastidiosibacteraceae fam. nov. within the order Thiotrichales
Xiao, Min and Salam, Nimaichand and Liu, Lan and Jiao, Jian-Yu and Zheng, Min-Ling and Wang, Juan and Li, Song and Chen, Cha and Li, Wen-Jun and Qu, Ping-Hua,, 68, 347-352 (2018),
doi = https://doi.org/10.1099/ijsem.0.002510,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= A Francisella -like bacterium, designated strain SYSU HZH-2T, was isolated from a water sample collected from Haizhu Lake, Guangzhou, China. The bacterium was fastidious, and required an exogenous source of l-cysteine for its growth on artificial media. Cells were Gram-stain-negative, coccobacilli, non-motile and non-spore-forming. The strain shared highest 16S rRNA gene sequence similarities with Cysteiniphilum litorale SYSU D3-2T (94.6 % identity), Fangia hongkongensis UST040201-002T (93.2 %) and Caedibacter taeniospiralis 51T (91.6 %). This strain possessed ubiquinone-8 as the respiratory quinone; diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine and phosphatidylglycerol as the known polar lipids, and anteiso-C15 : 0 and C18 : 0 as the major fatty acids (>10 % of total fatty acids). The dendrograms based on 16S rRNA gene sequence analysis showed that it formed a separate cluster along with Cysteiniphilum litorale SYSU D3-2T, Caedibacter taeiniospiralis 51T and Fangia hongkongensis UST040201-002T. Based on the 16S rRNA gene sequence identity and differences in other phenotypic characteristics, the strain is considered to represent a novel species of a novel genus, for which the name Fastidiosibacter lacustris gen. nov., sp. nov. is proposed. The type strain of the type species Fastidiosibacter lacustris is SYSU HZH-2T (=NBRC 112274T = CGMCC 1.15950T). Additionally, the new taxon along with the genera Caedibacter , Cysteiniphilum and Fangia (family unassigned) were distinctly separated from the related families Francisellaceae , Piscirickettsiaceae and Thiotrichaeae in the phylogenetic trees. Therefore, we proposed a new family Fastidiosibacteraceae fam. nov. within the order Thiotrichales to accommodate these four genera.,
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