| Abstract |
A novel actinomycete, strain S7F-02(T), which produced primary branched hyphae and fragmented into V- and Y-shaped bacillary cells, was isolated from marine sediment collected in the Andaman Sea, Trang Province, Thailand. Lysine was found to be the diagnostic diamino acid in the cell-wall peptidoglycan. The whole-cell sugars of strain S7F-02(T) were ribose, arabinose and glucose. The characteristic phospholipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylinositol. The predominant menaquinone was MK-9(H(4)). The predominant cellular fatty acids were anteiso-C(15 : 0) and iso-C(15 : 0). The G+C content of the genomic DNA of strain S7F-02(T) was 70.6 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain S7F-02(T) should be classified in the genus Promicromonospora. This strain formed a close association with Promicromonospora citrea DSM 43110(T), with which it shared 99.2 % 16S rRNA gene sequence similarity. DNA-DNA hybridization data together with physiological and biochemical properties showed that strain S7F-02(T) could be readily distinguished from its closest phylogenetic relatives. On the basis of these phenotypic and genotypic data, strain S7F-02(T) is considered to represent a novel species of the genus Promicromonospora, for which the name Promicromonospora thailandica sp. nov. is proposed. The type strain is S7F-02(T) (= BCC 41922(T) = JCM 17130(T)).
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