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Brevibacterium celere sp. nov., isolated from degraded thallus of a brown alga

¹ Industrial Research Institute, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia
² Pacific Institute of Bioorganic Chemistry of the Far-Eastern Branch of the Russian Academy of Sciences, Prospekt 100 Let Vladivostoku 159, Russia
³ UMR6543 CNRS – Université de Nice Sophia Antipolis, Centre de Biochimie, Parc Valrose, F06108 Nice cedex 2, France
⁴ Institute of Marine Biology of the Far-Eastern Branch of the Russian Academy of Sciences, 690041, Vladivostok, Russia
⁵ Institute of Microbiology of the Russian Academy of Sciences, 117811 Moscow, Russia

Correspondence
Elena P. Ivanova
eivanova{at}swin.edu.au

Two whitish yellow, Gram-positive, non-motile, aerobic bacteria were isolated from enrichment culture during degradation of the thallus of the brown alga Fucus evanescens. The bacteria studied were chemo-organotrophic, mesophilic and grew well on nutrient media containing up to 15 % (w/v) NaCl. The DNA G+C content was 61 mol%. The two isolates exhibited a conspecific DNA–DNA relatedness value of 98 %, indicating that they belong to the same species. A comparative analysis of 16S rRNA gene sequences revealed that strain KMM 3637^T formed a distinct phyletic lineage in the genus Brevibacterium (family Brevibacteriaceae, class Actinobacteria) and showed the highest sequence similarity (about 97 %) to Brevibacterium casei. DNA–DNA hybridization experiments demonstrated 45 % binding with the DNA of B. casei DSM 20657^T. Physiological and chemotaxonomic characteristics (meso-diaminopimelic acid in the peptidoglycan, major cellular fatty acids 15 : 0ai and 17 : 0ai) of the bacteria studied were consistent with the genomic and phylogenetic data. On the basis of the results of this study, a novel species, Brevibacterium celere sp. nov., is proposed. The type strain is KMM 3637^T (=DSM 15453^T=ATCC BAA-809^T).

A consensus tree including ‘B. sanguinis’ and the fatty acid compositions of B. celere sp. nov. strains are available as supplementary material in IJSEM Online.

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