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1 Division of Applied Life Science, EB-NCRC, PMBBRC, Gyeongsang National University, Jinju 660-701, Republic of Korea
2 Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
Correspondence
Che Ok Jeon
cojeon{at}gnu.ac.kr
A long, Gram-negative, rod-shaped bacterium, designated strain EMB13T, was isolated from a wastewater treatment plant in Korea. The isolate was strictly aerobic and non-motile. The strain grew optimally at 30–35 °C and pH 7.5–8.0, and the predominant fatty acids were iso-C15 : 0, summed feature 3 (C16 : 1
7c and/or iso-C15 : 0 2-OH), C16 : 1
5c and iso-C17 : 0 3-OH. The strain contained a large amount of phosphatidylethanolamine and small amounts of phosphatidylcholine and an unknown phospholipid as the polar lipids. The G+C content of the genomic DNA was 40.1 mol% and the major isoprenoid quinone was menaquinone-7. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain EMB13T belonged to the genus Runella and was most closely related to Runella limosa EMB111T, with a 16S rRNA gene sequence similarity of 97.1 %. DNA–DNA relatedness between strain EMB13T and R. limosa EMB111T was approximately 25 %. On the basis of phenotypic, chemotaxonomic and molecular data, it is clear that strain EMB13T represents a novel species within the genus Runella, for which the name Runella defluvii sp. nov. is proposed. The type strain is EMB13T (=KCTC 12614T =DSM 17976T).
These authors contributed equally to this work. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain EMB13T is DQ372980.
A transmission electron micrograph of cells of strain EMB13T and API 50CH utilization results for strain EMB13T are available as supplementary material with the online version of this paper.
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