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Paracoccus homiensis sp. nov., isolated from a sea-sand sample

¹ Korean Agricultural Culture Collection (KACC), Genetic Resources Division, National Institute of Agricultural Biotechnology, Rural Development Administration (RDA), Suwon 441-707, South Korea
² Applied Microbiology Division, National Institute of Agricultural Science and Technology, Rural Development Administration (RDA), Suwon 441-707, South Korea
³ Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany

Correspondence
Soon-Wo Kwon
swkwon{at}rda.go.kr

Strain DD-R11^T, isolated from a sea-sand sample from Homi Cape, Pohang city, South Korea, was a Gram-negative, aerobic, motile, non-spore-forming, rod- to ovoid-shaped bacterium. Colonies grown on marine agar were circular, convex and colourless to creamy white. Growth occurred between 10 and 40 °C (optimum 25–30 °C) and at pH 5.0–9.0 (optimum pH 6.0–8.0). The strain could grow in up to 15 % NaCl (optimum 3–5 % NaCl). According to 16S rRNA gene sequence analysis, the strain was a member of the genus Paracoccus in the Alphaproteobacteria. Sequence similarities to type strains of the genus Paracoccus were between 94.6 and 98.3 %, showing the highest sequence similarity to Paracoccus zeaxanthinifaciens ATCC 21588^T. The DNA–DNA relatedness value of strain DD-R11^T and P. zeaxanthinifaciens ATCC 21588^T was 27 %. Strain DD-R11^T was characterized by having ubiquinone 10 as the major respiratory quinone and C_{18 : 1}7c as the predominant fatty acid. The DNA G+C content was 63.0 mol%. On the basis of its phenotypic and genotypic characteristics, it is suggested that DD-R11^T represents a novel species of the genus Paracoccus, for which the name Paracoccus homiensis sp. nov. is proposed, with DD-R11^T (=KACC 11518^T=DSM 17862^T) as the type strain.

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