Sunxiuqinia dokdonensis sp. nov., Isolated from Deep Sub-Seafloor Sediment

Dong-Ho Chang; Jae-Bong Lee; Geun-Hye Lee; Moon-Soo Rhee; Haewon Lee; Kyung Sook Bae; Doo-Sang Park; Byoung-Chan Kim

doi:10.1007/s12275-013-3492-z

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Research Support, Non-U.S. Gov't
Sunxiuqinia dokdonensis sp. nov., Isolated from Deep Sub-Seafloor Sediment: Dong-Ho Chang ¹, Jae-Bong Lee ², Geun-Hye Lee ¹, Moon-Soo Rhee ¹, Haewon Lee ², Kyung Sook Bae ¹, Doo-Sang Park ¹, Byoung-Chan Kim ¹; Journal of Microbiology 2013;51(6):741-746.
DOI: https://doi.org/10.1007/s12275-013-3492-z
Published online: December 19, 2013

¹Korean Collection for Type Cultures (KCTC), Biological Resource Center (BRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea, ²Dokdo Fisheries Research Center, National Fisheries Research and Development Institute, Pohang 791-119, Republic of Korea

Corresponding author: Byoung-Chan Kim , Tel: +82-42-860-4628,

Received: 25 September 2013 • Accepted: 25 November 2013

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Abstract

A novel facultatively anaerobic strain DH1T was isolated from deep sub-seafloor sediment at a depth of 900 m below the seafloor off Seo-do (the west part of Dokdo Island) in the East Sea of the Republic of Korea. The new strain was characterized using polyphasic approaches. The isolate was Gram-stain-negative, motile by gliding, non-spore-forming rods, oxidase-negative, and catalase-positive; and formed colonies of orange-red color. The NaCl range for growth was 0.5–7.0% (w/v) and no growth was observed in the absence of NaCl. The isolate grew optimally at 30°C, with 2% (w/v) NaCl and at pH 7. The cell-wall hydrolysates contained ribose as a major sugar. The DNA G+C content was 40.8 mol%. The closest related strains are Sunxiuqinia faeciviva JAM-BA0302T and Sunxiuqinia elliptica DQHS-4T (97.9 and 96.3% sequence similarity, respectively). The level of DNADNA relatedness between strain DH1T and S. faeciviva JAMBA0302T was around 41% (but only 6% between DH1T and S. elliptica DQHS-4T). The major cellular fatty acids of the isolate were contained iso-C15:0 (25.9%), anteiso-C15:0 (16.7%), and summed feature 9 (comprising C16:0 3-OH and/or unknown fatty acid of dimethylacetal ECL 17.157; 13.2%). The predominant menaquinone was MK-7. On the basis of polyphasic evidence from this study, the isolate was considered to represent a novel species of the genus Sunxiuqinia, for which the name Sunxiuqinia dokdonensis sp. nov. is proposed; the type strain is DH1T (=KCTC 32503T =CGMCC 1.12676T =JCM 19380T).

Keywords: Sunxiuqinia dokdonensis;16S rRNA;taxonomy;Dokdo;Sub-seafloor;Bacteroidetes

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Sunxiuqinia dokdonensis sp. nov., Isolated from Deep Sub-Seafloor Sediment

J. Microbiol. 2013;51(6):741-746. Published online December 19, 2013

DOI: https://doi.org/10.1007/s12275-013-3492-z

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