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Brevibacterium oceani sp. nov., isolated from deep-sea sediment of the Chagos Trench, Indian Ocean

¹ Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
² National Institute of Oceanography, Dona Paula, Goa 403 004, India

Correspondence
Sisinthy Shivaji
shivas{at}ccmb.res.in

Two bacterial strains, designated BBH5 and BBH7^T, were isolated from a deep-sea sediment sample collected from the Chagos Trench of the Indian Ocean (1 ° 06' S 7 ° 31' E). Based on their 16S rRNA gene sequence similarity (99.9 %), level of DNA–DNA relatedness (93 %) and a number of similar phenotypic characteristics, the two strains are identified as representing the same species. Their phylogenetically nearest neighbours, based on 16S rRNA gene sequence similarity values (97.9–98.4 %), were identified as Brevibacterium iodinum, Brevibacterium epidermidis, Brevibacterium linens and Brevibacterium permense. However, strains BBH5 and BBH7^T could be distinguished from the above four species by a number of phenotypic characteristics, and levels of DNA–DNA relatedness between the two new isolates and these Brevibacterium species were 35–42 %. Therefore, strains BBH5 and BBH7^T are considered to represent a novel species of the genus Brevibacterium, for which the name Brevibacterium oceani sp. nov. is proposed. The type strain is BBH7^T (=LMG 23457^T =IAM 15353^T).

An extended phylogenetic tree based on 16S rRNA gene sequences and tables comparing the phenotypic characteristics and cellular fatty acid profiles of strain BBH7^T with those of other members of the genus Brevibacterium are available as supplementary material with the online version of this paper.