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Rhodanobacter thiooxydans sp. nov., isolated from a biofilm on sulfur particles used in an autotrophic denitrification process

Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseong, Yuseong, Daejeon, Republic of Korea

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

A novel thiosulfate-oxidizing bacterium, designated strain LCS2^T, was isolated from a biofilm on sulfur particles used in an autotrophic denitrification process. The strain was found to comprise Gram-negative, non-motile, non-spore-forming rods that produced yellow-pigmented colonies on R2A agar. The strain contained Q-8 as the major ubiquinone and 17 : 1 iso 9c, 15 : 0 iso and 17 : 0 iso as the major fatty acids. The G+C content of the genomic DNA was 64.6 mol%. The 16S rRNA gene sequence of strain LCS2^T was found to be most similar to that of Rhodanobacter fulvus IAM 15025^T (97.4 % similarity). The results of DNA–DNA hybridization and phenotypic analysis showed that strain LCS2^T can be distinguished from all known Rhodanobacter species and therefore represents a novel species of the genus, for which the name Rhodanobacter thiooxydans sp. nov. is proposed. The type strain is LCS2^T (=DSM 18863^T =KCTC 12771^T).