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  • Title: Lutibacter citreus sp. nov., isolated from Arctic surface sediment.
    Author: Du ZZ, Zhou LY, Wang TJ, Li HR, Du ZJ.
    Journal: Int J Syst Evol Microbiol; 2020 May; 70(5):3154-3161. PubMed ID: 32302274.
    Abstract:
    A Gram-stain-negative, aerobic, non-motile, non-gliding, yellow-pigmented and rod-shaped bacterial strain, designated 1KV19T, was isolated from a surface sediment sample collected near a bay in the Arctic. Growth of strain 1KV19T occurred in 1-4 % (w/v) NaCl (optimum, 2 %), at 4-35 °C (optimum, 25-30 °C) and at pH 6.5-8.0 (optimum, pH 7.0-7.5). The phylogenetic trees based on the 16S rRNA gene sequences showed that strain 1KV19T was associated with the genus Lutibacter and had the highest 16S rRNA gene sequence similarity to Lutibacter oceani 325-5T with 98.1 % similarity. Similarity values between strain 1KV19T and the type strains of other Lutibacter species were in the range 95.9-97.6 %. The average nucleotide identity and digital DNA-DNA hybridization values between strain 1KV19T and related species of the genus Lutibacter were 76.4-79.1 and 19.9-22.3 %, respectively. The major cellular fatty acids of strain 1KV19T were iso-C15 : 0 3-OH, iso-C15 : 0 and iso-C16 : 1 H. The respiratory quinone was MK-6. The major polar lipids of strain 1KV19T were phosphatidylethanolamine, one unidentified aminolipid and two unidentified polar lipids. The phenotypic, genotypic and chemotaxonomic differences between strain 1KV19T and its phylogenetic relatives indicate that strain 1KV19T should be regarded as representing a novel species in the genus Lutibacter, for which the name Lutibacter citreus sp. nov. is proposed. The type strain is 1KV19T (=KCTC 62595T=MCCC 1H00307T).
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