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Int J Syst Evol Microbiol 57 (2007), 2794-2798; DOI  10.1099/ijs.0.64911-0
© 2007 International Union of Microbiological Societies

Lapillicoccus jejuensis gen. nov., sp. nov., a novel actinobacterium of the family Intrasporangiaceae, isolated from stone

Soon Dong Lee and Dong Wan Lee

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

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

A novel, yellow-pigmented actinobacterium was isolated from a small stone collected in Jeju, Republic of Korea. The cells of the organism, designated strain R-Ac013T, were Gram-positive, aerobic, non-motile cocci that occurred singly or in pairs. The strain showed growth at 10–37 °C and pH 4.1–11.1, and tolerated 2 % NaCl. On the basis of the 16S rRNA gene sequence, the organism was phylogenetically related to members of the genera Tetrasphaera (94.6–97.1 % sequence similarity), Terrabacter (96.5 %), Knoellia (96.4 %), Terracoccus (96.4 %), Oryzihumus (96.4 %), Janibacter (96.1–96.4 %) and Intrasporangium (96.2 %). The chemotaxonomic results for the organism were as follows: LL-diaminopimelic acid as the diagnostic diamino acid in the peptidoglycan, acetyl-type murein, MK-8(H4) as the major menaquinone, a DNA G+C content of 74.1 mol%, and a polar lipid profile that comprised diphosphatidylglycerol and phosphatidylinositol. The fatty acid profile consisted of iso- and anteiso-methyl-branched, straight-chain saturated and monounsaturated types, the major components being iso-C16 : 0, C17 : 1{omega}8c and iso-C15 : 0. The combination of the phenotypic and phylogenetic data revealed that this strain represents a novel genus and species of the family Intrasporangiaceae, for which the name Lapillicoccus jejuensis gen. nov., sp. nov. is proposed. The type strain is strain R-Ac013T (=KCTC 19200T=DSM 18607T).

Abbreviations: LL-DAP, LL-diaminopimelic acid; meso-DAP, meso-diaminopimelic acid

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain R-Ac013T is AM398397.

A transmission electron micrograph of cells of strain R-Ac013T is available as supplementary material with the online version of this paper.






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