Journal of Microbiology

Journal Article

Deinococcus rubellus sp. nov., bacteria isolated from the muscle of antarctic fish: Seok-Gwan Choi , Seon Hwa Jeon , Jae-Bong Lee , Eun Sun Joo , Sangyong Lim , Hee-Young Jung , Myung Kyum Kim; J. Microbiol. 2016;54(12):796-801. Published online November 26, 2016; DOI: https://doi.org/10.1007/s12275-016-6390-3

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Two new bacterial strains designated as Ant6T and Ant18 were isolated from the muscle of a fish which had been caught in the Antarctic Ocean. Both strains are Gram-stain-positive, catalase positive, oxidase negative, aerobic, and coccoid bacteria. Phylogenetic analysis based on the 16S rRNA gene sequences of strains Ant6T and Ant18 revealed that the strains Ant6T and Ant18 belong to the genus Deinococcus in the family Deinococcaceae in the class Deinococci. The highest degrees of sequence similarities of strains Ant6T and Ant18 were found with Deinococcus alpinitundrae LMG 24283T by 96.4% and 96.8%, respectively. Strain Ant6T exhibited a high level of DNA- DNA hybridization values with strain Ant18 (82 ± 0.6%). Chemotaxonomic data revealed that the predominant fatty acids were C17􍾙:􍾙0 cyclo, 16:0, and feature 3 (C16:1 ω6c/ω7c) for both strains. A complex polar lipid profile consisted of major amounts of unknown phosphoglycolipids (PGL) and unknown aminophospholipid (APL). Based on the phylogenetic, phenotypic, and chemotaxonomic data, strains Ant6T (=KEMB 9004-169T =JCM 31434T) and Ant18 (=KEMB 9004- 170) should be classified as a new species, for which the name Deinococcus rubellus sp. nov. is proposed.

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Complete genome sequence of Deinococcus rubellus Ant6 isolated from the fish muscle in the Antarctic Ocean
Surajit De Mandal, Sathiyaraj Srinivasan, Junhyun Jeon
Frontiers in Bioengineering and Biotechnology.2023;[Epub] CrossRef

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Deinococcus swuensis sp. nov., a Gamma-Radiation-Resistant Bacterium Isolated from Soil: Jae-Jin Lee , Hyun Ji Lee , Gi Seon Jang , Ja Myoung Yu , Ji Yoon Cha , Su Jeong Kim , Eun Bit Lee , Myung Kyum Kim; J. Microbiol. 2013;51(3):305-311. Published online June 28, 2013; DOI: https://doi.org/10.1007/s12275-013-3023-y

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Abstract

Strain DY59T, a Gram-positive non-motile bacterium, was isolated from soil in South Korea, and was characterized to determine its taxonomic position. Phylogenetic analysis based on the 16S rRNA gene sequence of strain DY59T revealed that the strain DY59T belonged to the family Deinococcaceae in the class Deinococci. The highest degree of sequence similarities of strain DY59T were found with Deinococcus radiopugnans KACC 11999T (99.0%), Deinococcus marmoris KACC 12218T (97.9%), Deinococcus saxicola KACC 12240T (97.0%), Deinococcus aerolatus KACC 12745T (96.2%), and Deinococcus frigens KACC 12220T (96.1%). Chemotaxonomic data revealed that the predominant fatty acids were iso-C15:0 (19.0%), C16:1 ω7c (17.7%), C15:1 ω6c (12.6%), iso-C17:0 (10.3%), and iso-C17:1 ω9c (10.3%). A complex polar lipid profile consisted of a major unknown phosphoglycolipid. The predominant respiratory quinone is MK-8. The cell wall peptidoglycan contained D-alanine, L-glutamic acid, glycine, and L-ornithine (di-amino acid). The novel strain showed resistance to gamma radiation, with a D10 value (i.e. the dose required to reduce the bacterial population by 10-fold) in excess of 5 kGy. Based on the phylogenetic, chemotaxonomic, and phenotypic data, strain DY59T (=KCTC 33033T =JCM 18581T) should be classified as a type strain of a novel species, for which the name Deinococcus swuensis sp. nov. is proposed.

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