As part of an enzyme-screening programme, an actinobacterium, strain HSM#10, was isolated from a sample collected from the base of a translucent quartz rock in Miers Valley, eastern Antarctica. The isolate produced branching vegetative mycelium that was characteristic of filamentous actinobacteria. The chemotaxonomic characteristics of the strain suggested that HSM#10 should be classified as a member of the genus . Furthermore, phylogenetic analysis based on 16S rRNA gene sequences showed that the strain was closely related to members of the genus , which supports the classification of this strain within the family . Phenotypic and phylogenetic results allowed strain HSM#10 to be differentiated from known streptomycetes. DNA–DNA hybridization data also showed that strain HSM#10 could be differentiated from its nearest phylogenetic neighbours DSM 40420 (53.55±3.15 % DNA relatedness), DSM 40431 (38.75±2.75 %), DSM 40150 (30.7±2.90 %) and DSM 41800 (33.9±0.10 %). Therefore, the name sp. nov. is proposed, with HSM#10 (=DSM 41950 =NRRL B-24669) as the type strain.


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vol. , part 8, pp. 2032 - 2035

Comparison of the growth characteristics of strain HSM#10 , NRRL B-12347 (=DSM 40420 ) and NRRL B-12365 (=DSM 40431 ) on different agar media. [PDF](46 KB)

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