1887

Abstract

A Gram-stain-negative, oval- or short-rod-shaped and non-motile bacterial strain, designated KEM-3, was isolated from water of Geumgang Estuary Bank, South Korea, and was subjected to a polyphasic taxonomic study. Strain KEM-3 grew optimally at pH 7.0–8.0, at 25 °C and in the presence of 2–3% (w/v) NaCl. The neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain KEM-3 fell within the clade comprising Altererythrobacter species, clustering with Altererythrobacter confluentis KEM-4 and Altererythrobacter gangjinensis KJ7, with which it exhibited 97.3 and 96.0 % sequence similarity, respectively. The 16S rRNA gene sequence similarity values between strain KEM-3 and the type strains of other Altererythrobacter species were 92.9–95.2 %. The DNA G+C content of strain KEM-3 was determined to be 59.0 mol% and its mean DNA–DNA relatedness with A. confluentis KEM-4 was 8.6±3.1 %. Strain KEM-3 contained Q-10 as the predominant ubiquinone and summed feature 8 (C18:1ω7c and/or C18:1ω6c), C17:1ω6c and summed feature 3 (C16:1ω6c and/or C16:1ω7c) as the major fatty acids. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, a sphingoglycolipid, an unidentified glycolipid and an unidentified phospholipid. Differential phenotypic properties, together with phylogenetic distinctiveness, demonstrated that strain KEM-3 is distinguishable from other Altererythrobacter species. On the basis of the data presented, strain KEM-3 is considered to represent a novel species of the genus Altererythrobacter , for which the name Altererythrobacter aquiaggeris sp. nov. is proposed. The type strain is KEM-3 (=KCTC 52471=NBRC 112425).

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2017-09-06
2019-10-15
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