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Altererythrobacter epoxidivorans gen. nov., sp. nov., an epoxide hydrolase-active, mesophilic marine bacterium isolated from cold-seep sediment, and reclassification of Erythrobacter luteolus Yoon et al. 2005 as Altererythrobacter luteolus comb. nov.

¹ Marine Biotechnology Research Center, Korea Ocean Research & Development Institute, PO Box 29, Ansan 425-600, Republic of Korea
² Extremobiosphere Research Center, JAMSTEC, 2-15 Natsushima-cho, Yokosuka City, Kanagawa 237-0061, Japan

Correspondence
Sang-Jin Kim
s-jkim{at}kordi.re.kr

A novel marine bacterium, strain JCS350^T, was isolated from marine sediment samples collected from a cold-seep area. The 16S rRNA gene sequence of the isolate showed high similarity to that of Erythrobacter luteolus SW-109^T (95.9 % sequence similarity). Lower 16S rRNA gene sequence similarities were shown to other members of the genus Erythrobacter (94.6–95.4 %) and members of the genus Porphyrobacter (94.5–95.2 %). Phylogenetic analysis with all members of the family Erythrobacteraceae and several members of the family Sphingomonadaceae revealed that the isolate formed a phyletic line with [Erythrobacter] luteolus that was distinct from other members of the family Erythrobacteraceae. The dominant fatty acids of strain JCS350^T were 18 : 17c, 16 : 17c and cyclopropane 17 : 0. The major respiratory quinone was ubiquinone 10. The DNA G+C content was 54.5 mol%. The isolate did not contain bacteriochlorophyll a. Optimal growth required the presence of 2 % (w/v) NaCl with either 0.18 % CaCl₂ or 0.59 % MgCl₂, at pH 6.5 and at 35 °C. On the basis of the evidence of this polyphasic taxonomic study, strain JCS350^T should be classified in a novel genus and species in the family Erythrobacteraceae, for which the name Altererythrobacter epoxidivorans gen. nov., sp. nov. is proposed. The misclassified species [Erythrobacter] luteolus is transferred to the new genus as Altererythrobacter luteolus comb. nov. The type strain of Altererythrobacter epoxidivorans is JCS350^T (=KCCM 42314^T =JCM 13815^T) and the type strain of Altererythrobacter luteolus is SW-109^T (=KCTC 12311^T =JCM 12599^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain JCS350^T is DQ304436.

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