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A Gram-stain-negative, non-motile, aerobic bacterium, strain 13-93-B1T, was isolated from seawater off Jeju Island, Republic of Korea, and was subjected to polyphasic taxonomic study. Cells formed ivory colonies and were ovoid to rod-shaped. The strain was catalase-positive, oxidase-negative and grew optimally at 30 °C, in the presence of 1-2 % (w/v) NaCl and at pH 7.0-7.5. It did not synthesize bacteriochlorophyll a. Neighbour-joining, maximum-likelihood and maximum-parsimony phylogenetic trees based on 16S rRNA gene sequences revealed that strain 13-93-B1T clustered with the type strain Donghicola eburneus SW-277T (97.0 % 16S rRNA gene sequence similarity). DNA-DNA hybridization between strain 13-93-B1T and D. eburneus KCTC 12735T was 33.1 ± 1.4 % (35.2 ± 2.8 % in a reciprocal experiment). The predominant cellular fatty acid was summed feature 8 (C18 : 1ω7c/C18 : 1ω6c; 76.9 %). The major respiratory quinone was ubiquinone Q-10 and polar lipids detected in strain 13-93-B1T were phosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, an unidentified aminolipid and unidentified lipids. The DNA G+C content of strain 13-93-B1T was 60.4 mol%. Based on the phenotypic, chemotaxonomic and phylogenetic data presented, strain 13-93-B1T is considered to represent a novel species of the genus Donghicola, for which the name Donghicola tyrosinivorans sp. nov. is proposed. The type strain is 13-93-B1T ( = DSM 100212T = KCTC 42571T).

Donghicola tyrosinivorans sp. nov., a tyrosine-degrading bacterium isolated from seawater