sp. nov., a gamma radiation-resistant bacterium isolated from gamma ray-irradiated soil.

A gamma radiation-resistant and pink-pigmented bacterial strain, designated as 17Sr1-39, was isolated from a gamma ray-irradiated soil sample collected in the Republic of Korea. Cells were Gram-stain-negative, strictly aerobic, flagellated, asporogenous, rod-shaped and methylotrophic. Results of 16S rRNA gene sequence analysis showed that strain 17Sr1-39 was phylogenetically related to PR1016A (97.3 %), DSM 16371 (97.2 %), PMB02 (97.0 %), IER25-16 (96.6 %), 17Sr1-28 (96.6 %) and JCM 2833 (93.4 %). The G+C content calculated based on the genome sequence was 70.4 mol%. The average nucleotide identity and DNA-DNA hybridization values between strain 17Sr1-39 and , , , , and were 77.3-89.9 and 22-38.2 %, respectively. The predominant fatty acids were summed feature 8 (Cω7 and/or Cω6) and summed feature 3 (Cω7 and/or Cω6). The predominant quinone was ubiquinone 10 and the major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Based on the data from phenotypic tests and genotypic differences between strain 17Sr1-39 and its close phylogenetic relatives, strain 17Sr1-39 represented a new species belonging to the genus , for which the name sp. nov. (=KACC 52905=NBRC 112874) is proposed.