1887

Abstract

A polyphasic taxonomic study was undertaken to clarify the exact position of type strain HEL-45 of Oceanibulbusindolifex Wagner-Döbler et al. 2004. A combination of physiological properties of HEL-45 were similar to those of its closest relatives, Sulfitobacterdelicatus KMM 3584 and Sulfitobacterdubius KMM 3554. The results of 16S rRNA gene sequences analysis indicated that HEL-45 and the two relatives shared 99.6 % similarity and formed a coherent cluster in the phylogenetic tree. The close relationship between HEL-45 and the two relatives was underpinned by the results for chemotaxonomic characters, including the fatty acids, quinone and polar lipids. The digital DNA–DNA hybridization values and between HEL-45 and the two relatives were 25.9 and 31.6 %, respectively, which were well below the 70 % threshold value recommended for delineation of bacterial species. The comparative phenotypic and genotypic analyses supported the incorporation of Oceanibulbusindolifex into the genus Sulfitobacter as Sulfitobacter indolifex comb. nov.; the type strain is HEL-45 (=MCCC 1A11773=DSM 14862=NCIMB 13983).

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/content/journal/ijsem/10.1099/ijsem.0.001950
2017-07-10
2019-10-20
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