f Melaminivora jejuensis sp. nov., isolated from Swinery waste

A sulfur-oxidizing bacterium, designated strain KBB12T, was isolated from swinery waste collected in Jeju, Republic of Korea. The cells were Gram-stain-negative, flagellated and rod-shaped. Growth occurred at 15–45 °C (optimum, 30–37 °C), at pH 6–9 (optimum, pH 7.0) and in the presence of 0–1 % (w/v) NaCl. The major cellular fatty acids were summed feature 3 (iso-C_15 : 0 2-OH and/or C_16 : 1 ω7c, C_16 : 0 and C_18 : 1ω7c. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipid and an unidentified lipid. The major isoprenoid quinone was ubiquinone-8 (Q-8) and the DNA G+C content of the genomic DNA was 69.6 mol%. Phylogenetic analyses, based on 16S rRNA gene sequences, showed that the novel isolate belongs to the genus Melaminivora and was most closely related to Melaminivora alkalimesophila CY1T (97.2 % similarity). The DNA–DNA relatedness values between strain KBB12T and M. alkalimesophila DSM26005T was 43.4 2.7 %. On the basis of phylogenetic and phenotypic evidence, it is proposed that strain KBB12T represents a novel species of the genus Melaminivora , for which the name Melaminivora jejuensis sp. nov. is proposed. The type strain is KBB12T (=KCTC 32230T=JCM 18740T).