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Tessaracoccus flavescens sp. nov., isolated from marine sediment

Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea

Correspondence
Soon Dong Lee
sdlee{at}cheju.ac.kr

A novel actinobacterium, designated strain SST-39^T, was isolated from a marine sediment sample collected in Jeju, Republic of Korea. Cells were facultatively anaerobic, Gram-positive, non-endospore-forming, non-motile rods. Colonies were circular, slightly convex, opaque and brilliant yellow. The cell-wall peptidoglycan of the organism contained LL-diaminopimelic acid as the diagnostic diamino acid. Polar lipids included phosphatidylglycerol and diphosphatidylglycerol. The predominant menaquinone was MK-9(H₄). The major cellular fatty acids were anteiso-C_{15 : 0}, C_{18 : 0} and C_{16 : 0}. The DNA G+C content was 68.4 mol%. A phylogenetic tree based on 16S rRNA gene sequences indicated that the isolate belonged to the family Propionibacteriaceae and formed a unique cluster with the type strain of Tessaracoccus bendigoensis (97.0 % sequence similarity). Other phylogenetic neighbours were the type strains of Luteococcus peritonei (95.1 % 16S rRNA gene sequence similarity) and Propionibacterium propionicum (95.1 %). On the basis of its phenotypic and phylogenetic distinctiveness, strain SST-39^T is considered to represent a novel species of the genus Tessaracoccus, for which the name Tessaracoccus flavescens sp. nov. is proposed. The type strain is SST-39^T (=DSM 18582^T =KCTC 19196^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SST-39^T is AM393882.

A transmission electron micrograph of cells of strain SST-39^T and an extended neighbour-joining tree based on 16S rRNA gene sequences are available as supplementary material with the online version of this paper.