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- Title
Spirosoma taeanense sp. nov., a radiation resistant bacterium isolated from a coastal sand dune.
- Authors
Lee, Ji Hee; Jung, Jong-Hyun; Kim, Min-Kyu; Choe, Han Na; Seong, Chi Nam; Lim, Sangyong
- Abstract
An aerobic, Gram-negative, non-motile, non-spore-forming, rod-shaped, and pale yellow-colored bacterial strain, designated TS118T, was isolated from a sand sample obtained from a coastal sand dune after exposure to 3 kGy of gamma radiation. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the isolate was a member of the genus Spirosoma and most closely related to Spirosoma metallicum PR1014kT (95.1% similarity). The genome of strain TS118T is constituted by one chromosome (5,691,492 bp) and one plasmid (28,440 bp) and has a G + C content of 52.7%. The genome contains 4641 protein coding sequences (CDSs), 38 tRNAs, and 11 rRNAs. The predominant fatty acids of strain TS118T were C16:1ω5c, iso-C15:0, C16:0, summed feature 3 (C16:1ω6c and/or C16:1ω7c), and iso-C17:0 3-OH. The major polar lipids were phosphatidylethanolamine, an unidentified amino lipid and an unidentified aminophospholipid. The main respiratory quinone was menaquinone-7 (MK-7). The novel strain showed resistance to gamma radiation with a D10 value (i.e., the dose required to reduce the bacterial population by tenfold) of 4.3 kGy. Based on the phylogenetic, physiological, and chemotaxonomic characteristics, strain TS118T represents a novel species, for which the name Spirosoma taeanense sp. nov. is proposed. The type strain is TS118T (=KCTC 72898T =JCM 34024T).
- Subjects
SAND dunes; GAMMA rays; RADIATION; AMINO acid sequence; BACTERIAL population; TRANSFER RNA
- Publication
Antonie van Leeuwenhoek, 2021, Vol 114, Issue 2, p151
- ISSN
0003-6072
- Publication type
Article
- DOI
10.1007/s10482-020-01508-0