1887

Abstract

A Gram-staining-positive, strictly aerobic, spherical, non-motile, red-pigmented bacterium, designated strain MK03, was isolated from a soil sample collected in South Korea. The taxonomic position of the novel strain was investigated using a polyphasic approach. In phylogenetic analyses based on 16S rRNA gene sequences, strain MK03 was placed in a clade formed by members of the genus in the family and appeared to be most closely related to 5516T-9 (97.4 % sequence similarity), AA-63 (97.2 %), ATCC 19172 (97.2 %) and AA-1444 (96.9 %). The genomic DNA G+C content of the novel strain was 64.5 mol%. The chemotaxonomic characteristics of strain MK03 were typical of members of the genus : MK-8 was identified as the predominant respiratory quinine, the major fatty acids were Cω7, Cω6, C and Cornithine was found to be the diamino acid in the cell-wall peptidoglycan and the novel strain showed resistance to gamma radiation, with a D value (i.e. the dose required to reduce the bacterial population by 10-fold) in excess of 9 kGy. In hybridization experiments, only low DNA–DNA relatedness values (11.6–34.5 %) were recorded between the novel strain and its closest relatives in the genus . Based on the phylogenetic, chemotaxonomic, phenotypic and DNA–DNA relatedness data, strain MK03 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is MK03 ( = KCTC 13619  = JCM 17915).

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2012-12-01
2019-12-08
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