%0 Journal Article %A Lee, Jae-Jin %A Lee, Yeon-Hee %A Park, Su-Jin %A Lee, Seung-Yeol %A Kim, Byung-Oh %A Ten, Leonid N %A Kim, Myung Kyum %A Jung, Hee-Young %T Spirosoma knui sp. nov., a radiation-resistant bacterium isolated from the Han River %D 2017 %J International Journal of Systematic and Evolutionary Microbiology, %V 67 %N 5 %P 1359-1365 %@ 1466-5034 %R https://doi.org/10.1099/ijsem.0.001817 %K Spirosoma %K polyphasic taxonomy %K Bacteroidetes %I Microbiology Society, %X A Gram-stain-negative, non-motile, non-spore-forming, rod-shaped, aerobic bacterium, designated 15J8-12T, was isolated from a water sample after exposure to 3 kGy of gamma radiation. The strain showed resistance to gamma radiation with a dose required to reduce the bacterial population 10 fold (D10) value of 4.7 kGy. The results of comparative 16S rRNA gene sequence analysis indicated that strain 15J8-12T represented a member of the family Cytophagaceae , phylum Bacteroidetes , and was most closely related to ‘Spirosoma fluminis’ 15J17 (97.92 %) and Spirosoma arcticum R2-35T (92.22 %). The G+C content of the genomic DNA of 15J8-12T was 51.3 mol%. The detection of menaquinone MK-7 as the predominant respiratory quinone, a fatty acid profile with summed feature 3 (C16 : 1ω7c/C16  : 1ω6c; 40.5 %), C16 : 1ω5c (35.3 %), C15 : 0 iso (6.9 %) and C16 : 0 (6.8 %) as the major components and phosphatidylethanolamine as the major polar lipid also supported the affiliation of 15J8-12T with the genus Spirosoma . The DNA–DNA relatedness between 15J8-12T and ‘Spirosoma fluminis’ 15J17 was 27.8 %. On the basis of its phenotypic and genotypic properties, together with its phylogenetic distinctiveness, 15J8-12T should be considered to be a representative of a novel species of the genus Spirosoma , for which the name Spirosoma knui sp. nov. is proposed. The type strain is 15J8-12T (=KCTC 52510T=JCM 31407T). %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.001817