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Chelatococcus daeguensis sp. nov., isolated from wastewater of a textile dye works, and emended description of the genus Chelatococcus

¹ Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejeon, Republic of Korea
² Department of Biological Science, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

A Gram-negative, non-spore-forming, rod-shaped bacterial strain, K106^T, was isolated from wastewater collected from a textile dye works in Korea. Strain K106^T grew optimally at pH 7.0–7.5 and 30–37 °C in the presence of 0–1.0 % (w/v) NaCl. A phylogenetic tree based on 16S rRNA gene sequences showed that strain K106^T joined the type strain of Chelatococcus asaccharovorans with a bootstrap resampling value of 99.9 %. The predominant ubiquinone of strain K106^T was Q-10. The fatty acid profile of strain K106^T was similar to that of C. asaccharovorans DSM 6462^T. Major polar lipids of strain K106^T and C. asaccharovorans DSM 6462^T were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, two aminolipids and two unidentified phospholipids. sym-Homospermidine, spermidine and putrescine were major polyamines. The DNA G+C content was 68.3 mol%. Strain K106^T exhibited 16S rRNA gene sequence similarity of 96.6 % to the type strain of C. asaccharovorans. DNA–DNA relatedness data and differential phenotypic properties, particularly differences in cell morphology and the ability to utilize nitrilotriacetate, demonstrated that strain K106^T can be differentiated from C. asaccharovorans. On the basis of phenotypic, phylogenetic and genetic data, strain K106^T represents a novel species of the genus Chelatococcus, for which the name Chelatococcus daeguensis sp. nov. is proposed. The type strain is K106^T (=KCTC 12979^T =CCUG 54519^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain K106^T is EF584507.