Aureibaculum algae sp. nov. isolated from the Pacific red alga Ahnfeltia tobuchiensis

A Gram stain-negative, aerobic, rod-shaped, motile by gliding and yellow-orange-pigmented bacterium, designated strain 10Alg 115(T), was isolated from the red alga Ahnfeltia tobuchiensis. The phylogenetic analysis based on 16S rRNA gene sequences placed the novel strain within the family Flavobacteriaceae, phylum Bacteroidetes. The nearest neighbor of the new isolate was Aureibaculum marinum KCTC 62204(T) with sequence similarity of 98.1%. The average nucleotide similarity and digital DNA-DNA hybridization values between the novel strain and Aureibaculum marinum KCTC 62204(T) were 80% and 22.3%, respectively. The prevalent fatty acids of strain 10Alg 115(T) were iso-C-15:0, iso-C-15:1 G(,) iso-C-17:0 3-OH, iso-C-16:0 3-OH and C-15:0. The polar lipid profile consisted of phosphatidylethanolamine, two unidentified aminolipids and two unidentified lipids. The DNA G + C content of the type strain calculated from the whole-genome sequence was 32.2 mol%. A combination of the genotypic and phenotypic data showed that the algal isolate represents a novel species of the of genus Aureibaculum, for which the name Aureibaculum algae sp. nov. is proposed. The type strain is 10Alg 115(T) (= KCTC 62086(T) = KMM 6764(T)).

Automated summary

A novel yellow-orange-pigmented bacterium, designated Aureibaculum algae sp. nov., was isolated from the red alga Ahnfeltia tobuchiensis, and it belongs to the family Flavobacteriaceae, phylum Bacteroidetes.