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Int J Syst Evol Microbiol 59 (2009), 1875-1879; DOI  10.1099/ijs.0.005140-0
© 2009 International Union of Microbiological Societies

Georgenia thermotolerans sp. nov., an actinobacterium isolated from forest soil

Moriyuki Hamada, Tomohiko Tamura, Yuumi Ishida and Ken-ichiro Suzuki

NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation, 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan

Correspondence
Moriyuki Hamada
hamada-moriyuki{at}nite.go.jp

A Gram-positive bacterium strain, designated TT02-04T, was isolated from a forest soil sample in Iriomote Island, Japan, and its taxonomic position was investigated by using a polyphasic approach. The peptidoglycan type of this organism was found to be A4{alpha} and lysine was the diagnostic cell-wall diamino acid of the peptidoglycan. The only menaquinone was MK-8(H4), and the major fatty acid was anteiso-C15 : 0. Galactose was detected as the cell-wall sugar. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylinositol mannosides. The DNA G+C content was 73.0 mol%. 16S rRNA gene sequencing studies indicated that strain TT02-04T was closely related to the type strains of Georgenia ruanii (99.0 %) and Georgenia muralis (97.7 %). However, DNA–DNA hybridization results and phenotypic characteristics revealed that the strain differed from the currently recognized species of the genus Georgenia. Therefore, strain TT02-04T represents a novel species of the genus Georgenia, for which the name Georgenia thermotolerans sp. nov. is proposed. The type strain is TT02-04T (=NBRC 104148T=DSM 21501T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain TT02-04T is AB436534.






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