Erythrobacter flavus sp. nov., a slight halophile from the East Sea in Korea

Abstract

Two Gram-negative, motile, non-spore-forming, yellow-pigmented and slightly halophilic strains (SW-46 T and SW-52) were isolated from sea water of the East Sea, Korea, and subjected to a polyphasic taxonomic study. Strains SW-46 T and SW-52 were characterized chemotaxonomically by having ubiquinone-10 (Q-10) as the predominant respiratory lipoquinone and C 18 : 1 v7c as the major fatty acid. Their DNA G+C content was 64?0-64?1 mol%. Strains SW-46 T and SW-52 showed 1 bp difference in their 16S rDNA sequences and a mean DNA-DNA relatedness level of 94?4 %. Phylogenetic analysis based on 16S rDNA sequences showed that strains SW-46 T and SW-52 fall within the a-subclass of the Proteobacteria and form a coherent cluster with Erythrobacter longus, Erythrobacter litoralis and Erythrobacter citreus. Levels of 16S rDNA similarity between strains SW-46 T and SW-52 and the type strains of these three Erythrobacter species were 96?5-97?9 %. Levels of DNA-DNA relatedness between strains SW-46 T and SW-52 and the type strains of E. longus, E. litoralis and E. citreus were 3?6-14?7 %. Therefore, on the basis of phenotypic properties, phylogeny and genomic data, strains SW-46 T and SW-52 should be placed in the genus Erythrobacter as a novel species, for which the name Erythrobacter flavus sp. nov. is proposed. The type strain is SW-46 T (=KCCM 41642 T =JCM 11808 T ).

Distributions of phospholipid and glycolipid fatty acids in two strains of different functional Erythrobacter sp. isolated from South China Sea

“…Of all the AAPB species, C 18∶2 is present only in the isolated Erythrobacter longus and some relatives which are phylogenetically related to this species, suggesting that C 18∶2ω7,13 may function as the indicator of Erythrobacter longus and its phylogenetically related relatives. This also substantiates that JL475 has a firmly phylogenetic relationship with Erythrobacter longus (Denner et al, 2002;Yoon et al, 2003;Rontani et al, 2005). 18 represents the total carbon number of fatty acids backbone, 2 denotes number of double bonds and 7, 13 after omega mean the double bonds positions relative to the terminal methyl end rather than to the carbonyl carbon.…”

New Light on Aerobic Anoxygenic Phototrophs

“…After all, in spite of the deceptive visual homogeneity of bacteria harboring divergent metabolic strategies, the difference made by possession of a photosynthetic apparatus is as signifi cant as would be the discovery of a fi sh breathing nitrate rather than oxygen. Yet, since 2002, no less than nine species of BChl-lacking bacteria have been proposed as members of phototrophic genera (Erythrobacter aquamaris, Erythrobacter citreus, Erythrobacter fl avus, Erythrobacter gaetbuli, Erythrobacter luteolus, Erythrobacter vulgaris, Roseovarius crassostreae, Roseovarius nubinhibens) (Denner et al, 2002;Yoon et al, 2003Yoon et al, , 2004aYoon et al, , 2005aGonzález et al, 2003;Boettcher et al, 2005;Ivanova et al, 2005). Conversely, and despite repeated appeals to the contrary since 1998 (Yurkov and Beatty, 1998), BChl-producing species such as H. phototrophica and S. marina are included in defi nitively non-phototrophic genera.…”

Diversity of culturable bacteria in deep-sea water from the South Atlantic Ocean

“…Strains identical to the genus Erythrobacter were observed in all the 3 sampling sites, and notably in all samples across the whole water column of 5-2700 m at CTD06. These strains were most closely related to Erythrobacter citreus from the western Mediterranean Sea, 24 E. flavus from the East Sea in Korea 25 and E. pelagi from the Red Sea. 26 The second most common group of strains was identical to the genus Alteromonas.…”