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Paracoccus koreensis sp. nov., isolated from anaerobic granules in an upflow anaerobic sludge blanket (UASB) reactor

Hyun-Jun La¹, Wan-Taek Im¹, Leonid N. Ten^1,2, Myung Suk Kang¹, Do-Yun Shin^1, and Sung-Taik Lee¹

¹ Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
² National University of Uzbekistan, VUZ-gorodok, Tashkent 700-174, Uzbekistan

Correspondence
Sung-Taik Lee
e_stlee{at}kaist.ac.kr

A Gram-negative, short rod- to coccus-shaped, non-spore-forming bacterium (Ch05^T) was isolated from granules in an upflow anaerobic sludge blanket (UASB) reactor. On the basis of 16S rRNA gene sequence similarity, strain Ch05^T was shown to belong to the subclass -Proteobacteria, being related to Paracoccus solventivorans (97·5 %), Paracoccus alkenifer (96·9 %) and Paracoccus kocurii (96·4 %). The phylogenetic distance from Paracoccus species with validly published names was always less than 96 %. Physiological and chemotaxonomic data (major ubiquinone, Q-10; major fatty acids, C_{18 : 1} and C_{18 : 0}) supported the affiliation of strain Ch05^T to the genus Paracoccus. The results of DNA–DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain Ch05^T from the 17 Paracoccus species with validly published names. Ch05^T therefore represents a novel species, for which the name Paracoccus koreensis sp. nov. is proposed. The type strain is Ch05^T (=KCTC 12238^T=IAM 15216^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain Ch05^T is AB187584.

Present address: School of Civil, Urban and Geosystem Engineering, Seoul National University, Shillim-dong, Gwanak-gu, Seoul, Republic of Korea.

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