Deinococcus seoulensis sp. nov., a bacterium isolated from sediment at Han River in Seoul, Republic of Korea

Jae-Jin Lee; Yeon-Hee Lee; Su-Jin Park; Sangyong Lim; Sun-Wook Jeong; Seung-Yeol Lee; Young-Je Cho; Myung Kyum Kim; Hee-Young Jung

doi:10.1007/s12275-016-6253-y

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Deinococcus seoulensis sp. nov., a bacterium isolated from sediment at Han River in Seoul, Republic of Korea: Jae-Jin Lee ¹, Yeon-Hee Lee ¹, Su-Jin Park ¹, Sangyong Lim ², Sun-Wook Jeong ², Seung-Yeol Lee ¹, Young-Je Cho ³, Myung Kyum Kim ⁴, Hee-Young Jung ^1,5; Journal of Microbiology 2016;54(8):537-542.
DOI: https://doi.org/10.1007/s12275-016-6253-y
Published online: August 2, 2016

¹School of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea, ²Radiation Research Division for Biotechnology, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea, ³School of Food Science and Biotechnology/Food and Bio-Industry Research Institute, Kyungpook National University, Daegu 41566, Republic of Korea, ⁴Department of Bio and Environmental Technology, Seoul Women’s University, Seoul 01797, Republic of Korea, ⁵Institute of Plant Medicine, Kyungpook National University, Daegu 41566, Republic of Korea¹School of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea, ²Radiation Research Division for Biotechnology, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea, ³School of Food Science and Biotechnology/Food and Bio-Industry Research Institute, Kyungpook National University, Daegu 41566, Republic of Korea, ⁴Department of Bio and Environmental Technology, Seoul Women’s University, Seoul 01797, Republic of Korea, ⁵Institute of Plant Medicine, Kyungpook National University, Daegu 41566, Republic of Korea

Corresponding author: Hee-Young Jung , Tel: +82-53-950-5760,

Received: 1 June 2016 • Revised: 12 July 2016 • Accepted: 12 July 2016

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Abstract

Strain 16F1ET was isolated from a 3-kGy-irradiated sediment sample collected at Han River in Seoul, Republic of Korea. Cells of this strain were observed to be Gram-positive, pililike structure, and short rod shape, and colonies were red in color. The strain showed the highest degree of 16S rRNA gene sequence similarity to Deinococcus aquaticus PB314T (98.8%), Deinococcus depolymerans TDMA-24T (98.1%), Deinococcus caeni Ho-08T (98.0%), and Deinococcus grandis DSM 3963T (97.0%). 16S rRNA gene sequence analysis identified this strain as a member of the genus Deinococcus (Family: Deinococcaceae). The genomic DNA G+C content of strain 16F1ET was 66.9 mol%. The low levels of DNA-DNA hybridization (< 56.2%) with the species mentioned above identified strain 16F1ET as a novel Deinococcus species. Its oxidase and catalase activities as well as the production of acid from glucose were positive. Growth of the strain was observed at 10–37°C (optimum: 20–30°C) and pH 4–10 (optimum: pH 7–8). The cells tolerated less than 5% NaCl and had low resistance to gamma radiation (D10 < 4 kGy). Strain 16F1ET possessed the following chemotaxonomic characteristics: C16:0, C15:1 ω6c, and C16:1 ω7c as the major fatty acids; phosphoglycolipid as the predominant polar lipid; and menaquinone-8 as the predominant respiratory isoprenoid quinone. Based on the polyphasic evidence, as well as the phylogenetic, genotypic, phenotypic, and chemotaxonomic characterization results, strain 16F1ET (=KCTC 33793T =JCM 31404T) is proposed to represent the type strain of a novel species, Deinococcus seoulensis sp. nov.

Keywords: Deinococcus;polyphasic taxonomy;gamma-radiation resistance

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Deinococcus seoulensis sp. nov., a bacterium isolated from sediment at Han River in Seoul, Republic of Korea

J. Microbiol. 2016;54(8):537-542. Published online August 2, 2016

DOI: https://doi.org/10.1007/s12275-016-6253-y

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